[PATCH AUTOSEL 4.19 01/47] drm: panel-orientation-quirks: Add quirk for KD Kurio Smart C15200 2-in-1

[PATCH AUTOSEL 4.19 01/47] drm: panel-orientation-quirks: Add quirk for KD Kurio Smart C15200 2-in-1

[Sasha Levin]

From: Hans de Goede <hdegoede@redhat.com>

[ Upstream commit a53f1dd3ab9fec715c6c2e8e01bf4d3c07eef8e5 ]

The KD Kurio Smart C15200 2-in-1 uses  a panel which has been mounted 90
degrees rotated. Add a quirk for this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Simon Ser <contact@emersion.fr>
Link: https://patchwork.freedesktop.org/patch/msgid/20210530110428.12994-3-hdegoede@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/drm_panel_orientation_quirks.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/drm_panel_orientation_quirks.c b/drivers/gpu/drm/drm_panel_orientation_quirks.c
index 652de972c3aea..6c04181470a67 100644
--- a/drivers/gpu/drm/drm_panel_orientation_quirks.c
+++ b/drivers/gpu/drm/drm_panel_orientation_quirks.c
@@ -164,6 +164,13 @@ static const struct dmi_system_id orientation_data[] = {
 		  DMI_EXACT_MATCH(DMI_BOARD_NAME, "TW891"),
 		},
 		.driver_data = (void *)&itworks_tw891,
+	}, {	/* KD Kurio Smart C15200 2-in-1 */
+		.matches = {
+		  DMI_EXACT_MATCH(DMI_SYS_VENDOR, "KD Interactive"),
+		  DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Kurio Smart"),
+		  DMI_EXACT_MATCH(DMI_BOARD_NAME, "KDM960BCP"),
+		},
+		.driver_data = (void *)&lcd800x1280_rightside_up,
 	}, {	/*
 		 * Lenovo Ideapad Miix 310 laptop, only some production batches
 		 * have a portrait screen, the resolution checks makes the quirk
-- 
2.33.0

[PATCH AUTOSEL 4.19 02/47] Bluetooth: sco: Fix lock_sock() blockage by memcpy_from_msg()

[Sasha Levin]

From: Takashi Iwai <tiwai@suse.de>

[ Upstream commit 99c23da0eed4fd20cae8243f2b51e10e66aa0951 ]

The sco_send_frame() also takes lock_sock() during memcpy_from_msg()
call that may be endlessly blocked by a task with userfaultd
technique, and this will result in a hung task watchdog trigger.

Just like the similar fix for hci_sock_sendmsg() in commit
92c685dc5de0 ("Bluetooth: reorganize functions..."), this patch moves
the  memcpy_from_msg() out of lock_sock() for addressing the hang.

This should be the last piece for fixing CVE-2021-3640 after a few
already queued fixes.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/bluetooth/sco.c | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 007a01b08dbe9..d052b454dc4e1 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -280,7 +280,8 @@ static int sco_connect(struct hci_dev *hdev, struct sock *sk)
 	return err;
 }
 
-static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
+static int sco_send_frame(struct sock *sk, void *buf, int len,
+			  unsigned int msg_flags)
 {
 	struct sco_conn *conn = sco_pi(sk)->conn;
 	struct sk_buff *skb;
@@ -292,15 +293,11 @@ static int sco_send_frame(struct sock *sk, struct msghdr *msg, int len)
 
 	BT_DBG("sk %p len %d", sk, len);
 
-	skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
+	skb = bt_skb_send_alloc(sk, len, msg_flags & MSG_DONTWAIT, &err);
 	if (!skb)
 		return err;
 
-	if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
-		kfree_skb(skb);
-		return -EFAULT;
-	}
-
+	memcpy(skb_put(skb, len), buf, len);
 	hci_send_sco(conn->hcon, skb);
 
 	return len;
@@ -714,6 +711,7 @@ static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg,
 			    size_t len)
 {
 	struct sock *sk = sock->sk;
+	void *buf;
 	int err;
 
 	BT_DBG("sock %p, sk %p", sock, sk);
@@ -725,14 +723,24 @@ static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg,
 	if (msg->msg_flags & MSG_OOB)
 		return -EOPNOTSUPP;
 
+	buf = kmalloc(len, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	if (memcpy_from_msg(buf, msg, len)) {
+		kfree(buf);
+		return -EFAULT;
+	}
+
 	lock_sock(sk);
 
 	if (sk->sk_state == BT_CONNECTED)
-		err = sco_send_frame(sk, msg, len);
+		err = sco_send_frame(sk, buf, len, msg->msg_flags);
 	else
 		err = -ENOTCONN;
 
 	release_sock(sk);
+	kfree(buf);
 	return err;
 }
 
-- 
2.33.0

[PATCH AUTOSEL 4.19 03/47] Bluetooth: fix use-after-free error in lock_sock_nested()

[Sasha Levin]

From: Wang ShaoBo <bobo.shaobowang@huawei.com>

[ Upstream commit 1bff51ea59a9afb67d2dd78518ab0582a54a472c ]

use-after-free error in lock_sock_nested is reported:

[  179.140137][ T3731] =====================================================
[  179.142675][ T3731] BUG: KMSAN: use-after-free in lock_sock_nested+0x280/0x2c0
[  179.145494][ T3731] CPU: 4 PID: 3731 Comm: kworker/4:2 Not tainted 5.12.0-rc6+ #54
[  179.148432][ T3731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014
[  179.151806][ T3731] Workqueue: events l2cap_chan_timeout
[  179.152730][ T3731] Call Trace:
[  179.153301][ T3731]  dump_stack+0x24c/0x2e0
[  179.154063][ T3731]  kmsan_report+0xfb/0x1e0
[  179.154855][ T3731]  __msan_warning+0x5c/0xa0
[  179.155579][ T3731]  lock_sock_nested+0x280/0x2c0
[  179.156436][ T3731]  ? kmsan_get_metadata+0x116/0x180
[  179.157257][ T3731]  l2cap_sock_teardown_cb+0xb8/0x890
[  179.158154][ T3731]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  179.159141][ T3731]  ? kmsan_get_metadata+0x116/0x180
[  179.159994][ T3731]  ? kmsan_get_shadow_origin_ptr+0x84/0xb0
[  179.160959][ T3731]  ? l2cap_sock_recv_cb+0x420/0x420
[  179.161834][ T3731]  l2cap_chan_del+0x3e1/0x1d50
[  179.162608][ T3731]  ? kmsan_get_metadata+0x116/0x180
[  179.163435][ T3731]  ? kmsan_get_shadow_origin_ptr+0x84/0xb0
[  179.164406][ T3731]  l2cap_chan_close+0xeea/0x1050
[  179.165189][ T3731]  ? kmsan_internal_unpoison_shadow+0x42/0x70
[  179.166180][ T3731]  l2cap_chan_timeout+0x1da/0x590
[  179.167066][ T3731]  ? __msan_metadata_ptr_for_load_8+0x10/0x20
[  179.168023][ T3731]  ? l2cap_chan_create+0x560/0x560
[  179.168818][ T3731]  process_one_work+0x121d/0x1ff0
[  179.169598][ T3731]  worker_thread+0x121b/0x2370
[  179.170346][ T3731]  kthread+0x4ef/0x610
[  179.171010][ T3731]  ? process_one_work+0x1ff0/0x1ff0
[  179.171828][ T3731]  ? kthread_blkcg+0x110/0x110
[  179.172587][ T3731]  ret_from_fork+0x1f/0x30
[  179.173348][ T3731]
[  179.173752][ T3731] Uninit was created at:
[  179.174409][ T3731]  kmsan_internal_poison_shadow+0x5c/0xf0
[  179.175373][ T3731]  kmsan_slab_free+0x76/0xc0
[  179.176060][ T3731]  kfree+0x3a5/0x1180
[  179.176664][ T3731]  __sk_destruct+0x8af/0xb80
[  179.177375][ T3731]  __sk_free+0x812/0x8c0
[  179.178032][ T3731]  sk_free+0x97/0x130
[  179.178686][ T3731]  l2cap_sock_release+0x3d5/0x4d0
[  179.179457][ T3731]  sock_close+0x150/0x450
[  179.180117][ T3731]  __fput+0x6bd/0xf00
[  179.180787][ T3731]  ____fput+0x37/0x40
[  179.181481][ T3731]  task_work_run+0x140/0x280
[  179.182219][ T3731]  do_exit+0xe51/0x3e60
[  179.182930][ T3731]  do_group_exit+0x20e/0x450
[  179.183656][ T3731]  get_signal+0x2dfb/0x38f0
[  179.184344][ T3731]  arch_do_signal_or_restart+0xaa/0xe10
[  179.185266][ T3731]  exit_to_user_mode_prepare+0x2d2/0x560
[  179.186136][ T3731]  syscall_exit_to_user_mode+0x35/0x60
[  179.186984][ T3731]  do_syscall_64+0xc5/0x140
[  179.187681][ T3731]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[  179.188604][ T3731] =====================================================

In our case, there are two Thread A and B:

Context: Thread A:              Context: Thread B:

l2cap_chan_timeout()            __se_sys_shutdown()
  l2cap_chan_close()              l2cap_sock_shutdown()
    l2cap_chan_del()                l2cap_chan_close()
      l2cap_sock_teardown_cb()        l2cap_sock_teardown_cb()

Once l2cap_sock_teardown_cb() excuted, this sock will be marked as SOCK_ZAPPED,
and can be treated as killable in l2cap_sock_kill() if sock_orphan() has
excuted, at this time we close sock through sock_close() which end to call
l2cap_sock_kill() like Thread C:

Context: Thread C:

sock_close()
  l2cap_sock_release()
    sock_orphan()
    l2cap_sock_kill()  #free sock if refcnt is 1

If C completed, Once A or B reaches l2cap_sock_teardown_cb() again,
use-after-free happened.

We should set chan->data to NULL if sock is destructed, for telling teardown
operation is not allowed in l2cap_sock_teardown_cb(), and also we should
avoid killing an already killed socket in l2cap_sock_close_cb().

Signed-off-by: Wang ShaoBo <bobo.shaobowang@huawei.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/bluetooth/l2cap_sock.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 967a9bb144157..d938311c58a8d 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -1328,6 +1328,9 @@ static void l2cap_sock_close_cb(struct l2cap_chan *chan)
 {
 	struct sock *sk = chan->data;
 
+	if (!sk)
+		return;
+
 	l2cap_sock_kill(sk);
 }
 
@@ -1336,6 +1339,9 @@ static void l2cap_sock_teardown_cb(struct l2cap_chan *chan, int err)
 	struct sock *sk = chan->data;
 	struct sock *parent;
 
+	if (!sk)
+		return;
+
 	BT_DBG("chan %p state %s", chan, state_to_string(chan->state));
 
 	/* This callback can be called both for server (BT_LISTEN)
@@ -1519,8 +1525,10 @@ static void l2cap_sock_destruct(struct sock *sk)
 {
 	BT_DBG("sk %p", sk);
 
-	if (l2cap_pi(sk)->chan)
+	if (l2cap_pi(sk)->chan) {
+		l2cap_pi(sk)->chan->data = NULL;
 		l2cap_chan_put(l2cap_pi(sk)->chan);
+	}
 
 	if (l2cap_pi(sk)->rx_busy_skb) {
 		kfree_skb(l2cap_pi(sk)->rx_busy_skb);
-- 
2.33.0

[PATCH AUTOSEL 4.19 04/47] platform/x86: wmi: do not fail if disabling fails

[Sasha Levin]

From: Barnabás Pőcze <pobrn@protonmail.com>

[ Upstream commit 1975718c488a39128f1f515b23ae61a5a214cc3d ]

Previously, `__query_block()` would fail if the
second WCxx method call failed. However, the
WQxx method might have succeeded, and potentially
allocated memory for the result. Instead of
throwing away the result and potentially
leaking memory, ignore the result of
the second WCxx call.

Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com>
Link: https://lore.kernel.org/r/20210904175450.156801-25-pobrn@protonmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/platform/x86/wmi.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 35cdc3998eb59..387358af685c5 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -350,7 +350,14 @@ static acpi_status __query_block(struct wmi_block *wblock, u8 instance,
 	 * the WQxx method failed - we should disable collection anyway.
 	 */
 	if ((block->flags & ACPI_WMI_EXPENSIVE) && ACPI_SUCCESS(wc_status)) {
-		status = acpi_execute_simple_method(handle, wc_method, 0);
+		/*
+		 * Ignore whether this WCxx call succeeds or not since
+		 * the previously executed WQxx method call might have
+		 * succeeded, and returning the failing status code
+		 * of this call would throw away the result of the WQxx
+		 * call, potentially leaking memory.
+		 */
+		acpi_execute_simple_method(handle, wc_method, 0);
 	}
 
 	return status;
-- 
2.33.0

[PATCH AUTOSEL 4.19 05/47] MIPS: lantiq: dma: add small delay after reset

[Sasha Levin]

From: Aleksander Jan Bajkowski <olek2@wp.pl>

[ Upstream commit c12aa581f6d5e80c3c3675ab26a52c2b3b62f76e ]

Reading the DMA registers immediately after the reset causes
Data Bus Error. Adding a small delay fixes this issue.

Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/mips/lantiq/xway/dma.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/mips/lantiq/xway/dma.c b/arch/mips/lantiq/xway/dma.c
index 664f2f7f55c1c..45a622b72cd13 100644
--- a/arch/mips/lantiq/xway/dma.c
+++ b/arch/mips/lantiq/xway/dma.c
@@ -22,6 +22,7 @@
 #include <linux/export.h>
 #include <linux/spinlock.h>
 #include <linux/clk.h>
+#include <linux/delay.h>
 #include <linux/err.h>
 
 #include <lantiq_soc.h>
@@ -233,6 +234,8 @@ ltq_dma_init(struct platform_device *pdev)
 	clk_enable(clk);
 	ltq_dma_w32_mask(0, DMA_RESET, LTQ_DMA_CTRL);
 
+	usleep_range(1, 10);
+
 	/* disable all interrupts */
 	ltq_dma_w32(0, LTQ_DMA_IRNEN);
 
-- 
2.33.0

[PATCH AUTOSEL 4.19 06/47] MIPS: lantiq: dma: reset correct number of channel

[Sasha Levin]

From: Aleksander Jan Bajkowski <olek2@wp.pl>

[ Upstream commit 5ca9ce2ba4d5884cd94d1a856c675ab1242cd242 ]

Different SoCs have a different number of channels, e.g .:
* amazon-se has 10 channels,
* danube+ar9 have 20 channels,
* vr9 has 28 channels,
* ar10 has 24 channels.

We can read the ID register and, depending on the reported
number of channels, reset the appropriate number of channels.

Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/mips/lantiq/xway/dma.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/mips/lantiq/xway/dma.c b/arch/mips/lantiq/xway/dma.c
index 45a622b72cd13..efee1c538a518 100644
--- a/arch/mips/lantiq/xway/dma.c
+++ b/arch/mips/lantiq/xway/dma.c
@@ -41,6 +41,7 @@
 #define LTQ_DMA_PCTRL		0x44
 #define LTQ_DMA_IRNEN		0xf4
 
+#define DMA_ID_CHNR		GENMASK(26, 20)	/* channel number */
 #define DMA_DESCPT		BIT(3)		/* descriptor complete irq */
 #define DMA_TX			BIT(8)		/* TX channel direction */
 #define DMA_CHAN_ON		BIT(0)		/* channel on / off bit */
@@ -51,7 +52,6 @@
 #define DMA_POLL		BIT(31)		/* turn on channel polling */
 #define DMA_CLK_DIV4		BIT(6)		/* polling clock divider */
 #define DMA_2W_BURST		BIT(1)		/* 2 word burst length */
-#define DMA_MAX_CHANNEL		20		/* the soc has 20 channels */
 #define DMA_ETOP_ENDIANNESS	(0xf << 8) /* endianness swap etop channels */
 #define DMA_WEIGHT	(BIT(17) | BIT(16))	/* default channel wheight */
 
@@ -218,7 +218,7 @@ ltq_dma_init(struct platform_device *pdev)
 {
 	struct clk *clk;
 	struct resource *res;
-	unsigned id;
+	unsigned int id, nchannels;
 	int i;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -240,17 +240,18 @@ ltq_dma_init(struct platform_device *pdev)
 	ltq_dma_w32(0, LTQ_DMA_IRNEN);
 
 	/* reset/configure each channel */
-	for (i = 0; i < DMA_MAX_CHANNEL; i++) {
+	id = ltq_dma_r32(LTQ_DMA_ID);
+	nchannels = ((id & DMA_ID_CHNR) >> 20);
+	for (i = 0; i < nchannels; i++) {
 		ltq_dma_w32(i, LTQ_DMA_CS);
 		ltq_dma_w32(DMA_CHAN_RST, LTQ_DMA_CCTRL);
 		ltq_dma_w32(DMA_POLL | DMA_CLK_DIV4, LTQ_DMA_CPOLL);
 		ltq_dma_w32_mask(DMA_CHAN_ON, 0, LTQ_DMA_CCTRL);
 	}
 
-	id = ltq_dma_r32(LTQ_DMA_ID);
 	dev_info(&pdev->dev,
 		"Init done - hw rev: %X, ports: %d, channels: %d\n",
-		id & 0x1f, (id >> 16) & 0xf, id >> 20);
+		id & 0x1f, (id >> 16) & 0xf, nchannels);
 
 	return 0;
 }
-- 
2.33.0

[PATCH AUTOSEL 4.19 07/47] locking/lockdep: Avoid RCU-induced noinstr fail

[Sasha Levin]

From: Peter Zijlstra <peterz@infradead.org>

[ Upstream commit ce0b9c805dd66d5e49fd53ec5415ae398f4c56e6 ]

vmlinux.o: warning: objtool: look_up_lock_class()+0xc7: call to rcu_read_lock_any_held() leaves .noinstr.text section

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210624095148.311980536@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/locking/lockdep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 126c6d524a0f2..4dc79f57af827 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -689,7 +689,7 @@ look_up_lock_class(const struct lockdep_map *lock, unsigned int subclass)
 	if (DEBUG_LOCKS_WARN_ON(!irqs_disabled()))
 		return NULL;
 
-	hlist_for_each_entry_rcu(class, hash_head, hash_entry) {
+	hlist_for_each_entry_rcu_notrace(class, hash_head, hash_entry) {
 		if (class->key == key) {
 			/*
 			 * Huh! same key, different name? Did someone trample
-- 
2.33.0

[PATCH AUTOSEL 4.19 08/47] net: sched: update default qdisc visibility after Tx queue cnt changes

[Sasha Levin]

From: Jakub Kicinski <kuba@kernel.org>

[ Upstream commit 1e080f17750d1083e8a32f7b350584ae1cd7ff20 ]

mq / mqprio make the default child qdiscs visible. They only do
so for the qdiscs which are within real_num_tx_queues when the
device is registered. Depending on order of calls in the driver,
or if user space changes config via ethtool -L the number of
qdiscs visible under tc qdisc show will differ from the number
of queues. This is confusing to users and potentially to system
configuration scripts which try to make sure qdiscs have the
right parameters.

Add a new Qdisc_ops callback and make relevant qdiscs TTRT.

Note that this uncovers the "shortcut" created by
commit 1f27cde313d7 ("net: sched: use pfifo_fast for non real queues")
The default child qdiscs beyond initial real_num_tx are always
pfifo_fast, no matter what the sysfs setting is. Fixing this
gets a little tricky because we'd need to keep a reference
on whatever the default qdisc was at the time of creation.
In practice this is likely an non-issue the qdiscs likely have
to be configured to non-default settings, so whatever user space
is doing such configuration can replace the pfifos... now that
it will see them.

Reported-by: Matthew Massey <matthewmassey@fb.com>
Reviewed-by: Dave Taht <dave.taht@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 include/net/sch_generic.h |  4 ++++
 net/core/dev.c            |  2 ++
 net/sched/sch_generic.c   |  9 +++++++++
 net/sched/sch_mq.c        | 24 ++++++++++++++++++++++++
 net/sched/sch_mqprio.c    | 23 +++++++++++++++++++++++
 5 files changed, 62 insertions(+)

diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index d737a6a2600be..286bc674a6e79 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -216,6 +216,8 @@ struct Qdisc_ops {
 					  struct netlink_ext_ack *extack);
 	void			(*attach)(struct Qdisc *sch);
 	int			(*change_tx_queue_len)(struct Qdisc *, unsigned int);
+	void			(*change_real_num_tx)(struct Qdisc *sch,
+						      unsigned int new_real_tx);
 
 	int			(*dump)(struct Qdisc *, struct sk_buff *);
 	int			(*dump_stats)(struct Qdisc *, struct gnet_dump *);
@@ -547,6 +549,8 @@ void qdisc_class_hash_grow(struct Qdisc *, struct Qdisc_class_hash *);
 void qdisc_class_hash_destroy(struct Qdisc_class_hash *);
 
 int dev_qdisc_change_tx_queue_len(struct net_device *dev);
+void dev_qdisc_change_real_num_tx(struct net_device *dev,
+				  unsigned int new_real_tx);
 void dev_init_scheduler(struct net_device *dev);
 void dev_shutdown(struct net_device *dev);
 void dev_activate(struct net_device *dev);
diff --git a/net/core/dev.c b/net/core/dev.c
index 397bc2f50de08..2519a90a14827 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2648,6 +2648,8 @@ int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq)
 		if (dev->num_tc)
 			netif_setup_tc(dev, txq);
 
+		dev_qdisc_change_real_num_tx(dev, txq);
+
 		dev->real_num_tx_queues = txq;
 
 		if (disabling) {
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 4e15913e7519e..2128b77d5cb33 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -1256,6 +1256,15 @@ static int qdisc_change_tx_queue_len(struct net_device *dev,
 	return 0;
 }
 
+void dev_qdisc_change_real_num_tx(struct net_device *dev,
+				  unsigned int new_real_tx)
+{
+	struct Qdisc *qdisc = dev->qdisc;
+
+	if (qdisc->ops->change_real_num_tx)
+		qdisc->ops->change_real_num_tx(qdisc, new_real_tx);
+}
+
 int dev_qdisc_change_tx_queue_len(struct net_device *dev)
 {
 	bool up = dev->flags & IFF_UP;
diff --git a/net/sched/sch_mq.c b/net/sched/sch_mq.c
index c008a316e9436..699b6bb444cea 100644
--- a/net/sched/sch_mq.c
+++ b/net/sched/sch_mq.c
@@ -130,6 +130,29 @@ static void mq_attach(struct Qdisc *sch)
 	priv->qdiscs = NULL;
 }
 
+static void mq_change_real_num_tx(struct Qdisc *sch, unsigned int new_real_tx)
+{
+#ifdef CONFIG_NET_SCHED
+	struct net_device *dev = qdisc_dev(sch);
+	struct Qdisc *qdisc;
+	unsigned int i;
+
+	for (i = new_real_tx; i < dev->real_num_tx_queues; i++) {
+		qdisc = netdev_get_tx_queue(dev, i)->qdisc_sleeping;
+		/* Only update the default qdiscs we created,
+		 * qdiscs with handles are always hashed.
+		 */
+		if (qdisc != &noop_qdisc && !qdisc->handle)
+			qdisc_hash_del(qdisc);
+	}
+	for (i = dev->real_num_tx_queues; i < new_real_tx; i++) {
+		qdisc = netdev_get_tx_queue(dev, i)->qdisc_sleeping;
+		if (qdisc != &noop_qdisc && !qdisc->handle)
+			qdisc_hash_add(qdisc, false);
+	}
+#endif
+}
+
 static int mq_dump(struct Qdisc *sch, struct sk_buff *skb)
 {
 	struct net_device *dev = qdisc_dev(sch);
@@ -285,6 +308,7 @@ struct Qdisc_ops mq_qdisc_ops __read_mostly = {
 	.init		= mq_init,
 	.destroy	= mq_destroy,
 	.attach		= mq_attach,
+	.change_real_num_tx = mq_change_real_num_tx,
 	.dump		= mq_dump,
 	.owner		= THIS_MODULE,
 };
diff --git a/net/sched/sch_mqprio.c b/net/sched/sch_mqprio.c
index fcfe41a954733..3fd0e5dd7ae3e 100644
--- a/net/sched/sch_mqprio.c
+++ b/net/sched/sch_mqprio.c
@@ -308,6 +308,28 @@ static void mqprio_attach(struct Qdisc *sch)
 	priv->qdiscs = NULL;
 }
 
+static void mqprio_change_real_num_tx(struct Qdisc *sch,
+				      unsigned int new_real_tx)
+{
+	struct net_device *dev = qdisc_dev(sch);
+	struct Qdisc *qdisc;
+	unsigned int i;
+
+	for (i = new_real_tx; i < dev->real_num_tx_queues; i++) {
+		qdisc = netdev_get_tx_queue(dev, i)->qdisc_sleeping;
+		/* Only update the default qdiscs we created,
+		 * qdiscs with handles are always hashed.
+		 */
+		if (qdisc != &noop_qdisc && !qdisc->handle)
+			qdisc_hash_del(qdisc);
+	}
+	for (i = dev->real_num_tx_queues; i < new_real_tx; i++) {
+		qdisc = netdev_get_tx_queue(dev, i)->qdisc_sleeping;
+		if (qdisc != &noop_qdisc && !qdisc->handle)
+			qdisc_hash_add(qdisc, false);
+	}
+}
+
 static struct netdev_queue *mqprio_queue_get(struct Qdisc *sch,
 					     unsigned long cl)
 {
@@ -632,6 +654,7 @@ static struct Qdisc_ops mqprio_qdisc_ops __read_mostly = {
 	.init		= mqprio_init,
 	.destroy	= mqprio_destroy,
 	.attach		= mqprio_attach,
+	.change_real_num_tx = mqprio_change_real_num_tx,
 	.dump		= mqprio_dump,
 	.owner		= THIS_MODULE,
 };
-- 
2.33.0

[PATCH AUTOSEL 4.19 09/47] smackfs: Fix use-after-free in netlbl_catmap_walk()

[Sasha Levin]

From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>

[ Upstream commit 0817534ff9ea809fac1322c5c8c574be8483ea57 ]

Syzkaller reported use-after-free bug as described in [1]. The bug is
triggered when smk_set_cipso() tries to free stale category bitmaps
while there are concurrent reader(s) using the same bitmaps.

Wait for RCU grace period to finish before freeing the category bitmaps
in smk_set_cipso(). This makes sure that there are no more readers using
the stale bitmaps and freeing them should be safe.

[1] https://lore.kernel.org/netdev/000000000000a814c505ca657a4e@google.com/

Reported-by: syzbot+3f91de0b813cc3d19a80@syzkaller.appspotmail.com
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 security/smack/smackfs.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index 009e83ee2d002..25705a72d31bc 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -859,6 +859,7 @@ static int smk_open_cipso(struct inode *inode, struct file *file)
 static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
 				size_t count, loff_t *ppos, int format)
 {
+	struct netlbl_lsm_catmap *old_cat;
 	struct smack_known *skp;
 	struct netlbl_lsm_secattr ncats;
 	char mapcatset[SMK_CIPSOLEN];
@@ -948,9 +949,11 @@ static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
 
 	rc = smk_netlbl_mls(maplevel, mapcatset, &ncats, SMK_CIPSOLEN);
 	if (rc >= 0) {
-		netlbl_catmap_free(skp->smk_netlabel.attr.mls.cat);
+		old_cat = skp->smk_netlabel.attr.mls.cat;
 		skp->smk_netlabel.attr.mls.cat = ncats.attr.mls.cat;
 		skp->smk_netlabel.attr.mls.lvl = ncats.attr.mls.lvl;
+		synchronize_rcu();
+		netlbl_catmap_free(old_cat);
 		rc = count;
 	}
 
-- 
2.33.0

[PATCH AUTOSEL 4.19 10/47] NET: IPV4: fix error "do not initialise globals to 0"

[Sasha Levin]

From: wangzhitong <wangzhitong@uniontech.com>

[ Upstream commit db9c8e2b1e246fc2dc20828932949437793146cc ]

this patch fixes below Errors reported by checkpatch
    ERROR: do not initialise globals to 0
    +int cipso_v4_rbm_optfmt = 0;

Signed-off-by: wangzhitong <wangzhitong@uniontech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/ipv4/cipso_ipv4.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
index e8b8dd1cb1576..75908722de47a 100644
--- a/net/ipv4/cipso_ipv4.c
+++ b/net/ipv4/cipso_ipv4.c
@@ -87,7 +87,7 @@ struct cipso_v4_map_cache_entry {
 static struct cipso_v4_map_cache_bkt *cipso_v4_cache;
 
 /* Restricted bitmap (tag #1) flags */
-int cipso_v4_rbm_optfmt = 0;
+int cipso_v4_rbm_optfmt;
 int cipso_v4_rbm_strictvalid = 1;
 
 /*
-- 
2.33.0

Re: [PATCH AUTOSEL 4.19 10/47] NET: IPV4: fix error "do not initialise globals to 0"

[Joe Perches]

On Mon, 2021-11-08 at 12:49 -0500, Sasha Levin wrote:
> From: wangzhitong <wangzhitong@uniontech.com>
> 
> [ Upstream commit db9c8e2b1e246fc2dc20828932949437793146cc ]
> 
> this patch fixes below Errors reported by checkpatch
>     ERROR: do not initialise globals to 0
>     +int cipso_v4_rbm_optfmt = 0;
> 
> Signed-off-by: wangzhitong <wangzhitong@uniontech.com>
> Signed-off-by: David S. Miller <davem@davemloft.net>
> Signed-off-by: Sasha Levin <sashal@kernel.org>
> ---
>  net/ipv4/cipso_ipv4.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
> index e8b8dd1cb1576..75908722de47a 100644
> --- a/net/ipv4/cipso_ipv4.c
> +++ b/net/ipv4/cipso_ipv4.c
> @@ -87,7 +87,7 @@ struct cipso_v4_map_cache_entry {
>  static struct cipso_v4_map_cache_bkt *cipso_v4_cache;
>  
>  /* Restricted bitmap (tag #1) flags */
> -int cipso_v4_rbm_optfmt = 0;
> +int cipso_v4_rbm_optfmt;

I think this is a silly thing to backport unless it's required
for some other patch.

>  int cipso_v4_rbm_strictvalid = 1;
>  
>  /*

Re: [PATCH AUTOSEL 4.19 10/47] NET: IPV4: fix error "do not initialise globals to 0"

[Sasha Levin]

On Mon, Nov 08, 2021 at 05:49:04PM -0800, Joe Perches wrote:
>On Mon, 2021-11-08 at 12:49 -0500, Sasha Levin wrote:
>> From: wangzhitong <wangzhitong@uniontech.com>
>>
>> [ Upstream commit db9c8e2b1e246fc2dc20828932949437793146cc ]
>>
>> this patch fixes below Errors reported by checkpatch
>>     ERROR: do not initialise globals to 0
>>     +int cipso_v4_rbm_optfmt = 0;
>>
>> Signed-off-by: wangzhitong <wangzhitong@uniontech.com>
>> Signed-off-by: David S. Miller <davem@davemloft.net>
>> Signed-off-by: Sasha Levin <sashal@kernel.org>
>> ---
>>  net/ipv4/cipso_ipv4.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
>> index e8b8dd1cb1576..75908722de47a 100644
>> --- a/net/ipv4/cipso_ipv4.c
>> +++ b/net/ipv4/cipso_ipv4.c
>> @@ -87,7 +87,7 @@ struct cipso_v4_map_cache_entry {
>>  static struct cipso_v4_map_cache_bkt *cipso_v4_cache;
>>
>>  /* Restricted bitmap (tag #1) flags */
>> -int cipso_v4_rbm_optfmt = 0;
>> +int cipso_v4_rbm_optfmt;
>
>I think this is a silly thing to backport unless it's required
>for some other patch.

You're right - it's silly. I'll drop it.

-- 
Thanks,
Sasha

[PATCH AUTOSEL 4.19 11/47] x86: Increase exception stack sizes

[Sasha Levin]

From: Peter Zijlstra <peterz@infradead.org>

[ Upstream commit 7fae4c24a2b84a66c7be399727aca11e7a888462 ]

It turns out that a single page of stack is trivial to overflow with
all the tracing gunk enabled. Raise the exception stacks to 2 pages,
which is still half the interrupt stacks, which are at 4 pages.

Reported-by: Michael Wang <yun.wang@linux.alibaba.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/YUIO9Ye98S5Eb68w@hirez.programming.kicks-ass.net
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/x86/include/asm/page_64_types.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h
index 0b6352aabbd3d..b16fb3e185134 100644
--- a/arch/x86/include/asm/page_64_types.h
+++ b/arch/x86/include/asm/page_64_types.h
@@ -20,7 +20,7 @@
 #define THREAD_SIZE  (PAGE_SIZE << THREAD_SIZE_ORDER)
 #define CURRENT_MASK (~(THREAD_SIZE - 1))
 
-#define EXCEPTION_STACK_ORDER (0 + KASAN_STACK_ORDER)
+#define EXCEPTION_STACK_ORDER (1 + KASAN_STACK_ORDER)
 #define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
 
 #define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
-- 
2.33.0

[PATCH AUTOSEL 4.19 12/47] mwifiex: Run SET_BSS_MODE when changing from P2P to STATION vif-type

[Sasha Levin]

From: Jonas Dreßler <verdre@v0yd.nl>

[ Upstream commit c2e9666cdffd347460a2b17988db4cfaf2a68fb9 ]

We currently handle changing from the P2P to the STATION virtual
interface type slightly different than changing from P2P to ADHOC: When
changing to STATION, we don't send the SET_BSS_MODE command. We do send
that command on all other type-changes though, and it probably makes
sense to send the command since after all we just changed our BSS_MODE.
Looking at prior changes to this part of the code, it seems that this is
simply a leftover from old refactorings.

Since sending the SET_BSS_MODE command is the only difference between
mwifiex_change_vif_to_sta_adhoc() and the current code, we can now use
mwifiex_change_vif_to_sta_adhoc() for both switching to ADHOC and
STATION interface type.

This does not fix any particular bug and just "looked right", so there's
a small chance it might be a regression.

Signed-off-by: Jonas Dreßler <verdre@v0yd.nl>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210914195909.36035-4-verdre@v0yd.nl
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 .../net/wireless/marvell/mwifiex/cfg80211.c   | 22 ++++---------------
 1 file changed, 4 insertions(+), 18 deletions(-)

diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
index 650191db25cbe..becde7c254de2 100644
--- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
@@ -1233,29 +1233,15 @@ mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy,
 		break;
 	case NL80211_IFTYPE_P2P_CLIENT:
 	case NL80211_IFTYPE_P2P_GO:
+		if (mwifiex_cfg80211_deinit_p2p(priv))
+			return -EFAULT;
+
 		switch (type) {
-		case NL80211_IFTYPE_STATION:
-			if (mwifiex_cfg80211_deinit_p2p(priv))
-				return -EFAULT;
-			priv->adapter->curr_iface_comb.p2p_intf--;
-			priv->adapter->curr_iface_comb.sta_intf++;
-			dev->ieee80211_ptr->iftype = type;
-			if (mwifiex_deinit_priv_params(priv))
-				return -1;
-			if (mwifiex_init_new_priv_params(priv, dev, type))
-				return -1;
-			if (mwifiex_sta_init_cmd(priv, false, false))
-				return -1;
-			break;
 		case NL80211_IFTYPE_ADHOC:
-			if (mwifiex_cfg80211_deinit_p2p(priv))
-				return -EFAULT;
+		case NL80211_IFTYPE_STATION:
 			return mwifiex_change_vif_to_sta_adhoc(dev, curr_iftype,
 							       type, params);
-			break;
 		case NL80211_IFTYPE_AP:
-			if (mwifiex_cfg80211_deinit_p2p(priv))
-				return -EFAULT;
 			return mwifiex_change_vif_to_ap(dev, curr_iftype, type,
 							params);
 		case NL80211_IFTYPE_UNSPECIFIED:
-- 
2.33.0

[PATCH AUTOSEL 4.19 13/47] mwifiex: Properly initialize private structure on interface type changes

[Sasha Levin]

From: Jonas Dreßler <verdre@v0yd.nl>

[ Upstream commit c606008b70627a2fc485732a53cc22f0f66d0981 ]

When creating a new virtual interface in mwifiex_add_virtual_intf(), we
update our internal driver states like bss_type, bss_priority, bss_role
and bss_mode to reflect the mode the firmware will be set to.

When switching virtual interface mode using
mwifiex_init_new_priv_params() though, we currently only update bss_mode
and bss_role. In order for the interface mode switch to actually work,
we also need to update bss_type to its proper value, so do that.

This fixes a crash of the firmware (because the driver tries to execute
commands that are invalid in AP mode) when switching from station mode
to AP mode.

Signed-off-by: Jonas Dreßler <verdre@v0yd.nl>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210914195909.36035-9-verdre@v0yd.nl
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/marvell/mwifiex/cfg80211.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
index becde7c254de2..892247145f428 100644
--- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
@@ -912,16 +912,20 @@ mwifiex_init_new_priv_params(struct mwifiex_private *priv,
 	switch (type) {
 	case NL80211_IFTYPE_STATION:
 	case NL80211_IFTYPE_ADHOC:
-		priv->bss_role =  MWIFIEX_BSS_ROLE_STA;
+		priv->bss_role = MWIFIEX_BSS_ROLE_STA;
+		priv->bss_type = MWIFIEX_BSS_TYPE_STA;
 		break;
 	case NL80211_IFTYPE_P2P_CLIENT:
-		priv->bss_role =  MWIFIEX_BSS_ROLE_STA;
+		priv->bss_role = MWIFIEX_BSS_ROLE_STA;
+		priv->bss_type = MWIFIEX_BSS_TYPE_P2P;
 		break;
 	case NL80211_IFTYPE_P2P_GO:
-		priv->bss_role =  MWIFIEX_BSS_ROLE_UAP;
+		priv->bss_role = MWIFIEX_BSS_ROLE_UAP;
+		priv->bss_type = MWIFIEX_BSS_TYPE_P2P;
 		break;
 	case NL80211_IFTYPE_AP:
 		priv->bss_role = MWIFIEX_BSS_ROLE_UAP;
+		priv->bss_type = MWIFIEX_BSS_TYPE_UAP;
 		break;
 	default:
 		mwifiex_dbg(adapter, ERROR,
-- 
2.33.0

[PATCH AUTOSEL 4.19 14/47] media: mt9p031: Fix corrupted frame after restarting stream

[Sasha Levin]

From: Dirk Bender <d.bender@phytec.de>

[ Upstream commit 0961ba6dd211a4a52d1dd4c2d59be60ac2dc08c7 ]

To prevent corrupted frames after starting and stopping the sensor its
datasheet specifies a specific pause sequence to follow:

Stopping:
	Set Pause_Restart Bit -> Set Restart Bit -> Set Chip_Enable Off

Restarting:
	Set Chip_Enable On -> Clear Pause_Restart Bit

The Restart Bit is cleared automatically and must not be cleared
manually as this would cause undefined behavior.

Signed-off-by: Dirk Bender <d.bender@phytec.de>
Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/i2c/mt9p031.c | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/drivers/media/i2c/mt9p031.c b/drivers/media/i2c/mt9p031.c
index 715be3632b01a..eb08acf43e3a2 100644
--- a/drivers/media/i2c/mt9p031.c
+++ b/drivers/media/i2c/mt9p031.c
@@ -81,7 +81,9 @@
 #define		MT9P031_PIXEL_CLOCK_INVERT		(1 << 15)
 #define		MT9P031_PIXEL_CLOCK_SHIFT(n)		((n) << 8)
 #define		MT9P031_PIXEL_CLOCK_DIVIDE(n)		((n) << 0)
-#define MT9P031_FRAME_RESTART				0x0b
+#define MT9P031_RESTART					0x0b
+#define		MT9P031_FRAME_PAUSE_RESTART		(1 << 1)
+#define		MT9P031_FRAME_RESTART			(1 << 0)
 #define MT9P031_SHUTTER_DELAY				0x0c
 #define MT9P031_RST					0x0d
 #define		MT9P031_RST_ENABLE			1
@@ -448,9 +450,23 @@ static int mt9p031_set_params(struct mt9p031 *mt9p031)
 static int mt9p031_s_stream(struct v4l2_subdev *subdev, int enable)
 {
 	struct mt9p031 *mt9p031 = to_mt9p031(subdev);
+	struct i2c_client *client = v4l2_get_subdevdata(subdev);
+	int val;
 	int ret;
 
 	if (!enable) {
+		/* enable pause restart */
+		val = MT9P031_FRAME_PAUSE_RESTART;
+		ret = mt9p031_write(client, MT9P031_RESTART, val);
+		if (ret < 0)
+			return ret;
+
+		/* enable restart + keep pause restart set */
+		val |= MT9P031_FRAME_RESTART;
+		ret = mt9p031_write(client, MT9P031_RESTART, val);
+		if (ret < 0)
+			return ret;
+
 		/* Stop sensor readout */
 		ret = mt9p031_set_output_control(mt9p031,
 						 MT9P031_OUTPUT_CONTROL_CEN, 0);
@@ -470,6 +486,16 @@ static int mt9p031_s_stream(struct v4l2_subdev *subdev, int enable)
 	if (ret < 0)
 		return ret;
 
+	/*
+	 * - clear pause restart
+	 * - don't clear restart as clearing restart manually can cause
+	 *   undefined behavior
+	 */
+	val = MT9P031_FRAME_RESTART;
+	ret = mt9p031_write(client, MT9P031_RESTART, val);
+	if (ret < 0)
+		return ret;
+
 	return mt9p031_pll_enable(mt9p031);
 }
 
-- 
2.33.0

[PATCH AUTOSEL 4.19 15/47] media: netup_unidvb: handle interrupt properly according to the firmware

[Sasha Levin]

From: Zheyu Ma <zheyuma97@gmail.com>

[ Upstream commit dbb4cfea6efe979ed153bd59a6a527a90d3d0ab3 ]

The interrupt handling should be related to the firmware version. If
the driver matches an old firmware, then the driver should not handle
interrupt such as i2c or dma, otherwise it will cause some errors.

This log reveals it:

[   27.708641] INFO: trying to register non-static key.
[   27.710851] The code is fine but needs lockdep annotation, or maybe
[   27.712010] you didn't initialize this object before use?
[   27.712396] turning off the locking correctness validator.
[   27.712787] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 5.12.4-g70e7f0549188-dirty #169
[   27.713349] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
[   27.714149] Call Trace:
[   27.714329]  <IRQ>
[   27.714480]  dump_stack+0xba/0xf5
[   27.714737]  register_lock_class+0x873/0x8f0
[   27.715052]  ? __lock_acquire+0x323/0x1930
[   27.715353]  __lock_acquire+0x75/0x1930
[   27.715636]  lock_acquire+0x1dd/0x3e0
[   27.715905]  ? netup_i2c_interrupt+0x19/0x310
[   27.716226]  _raw_spin_lock_irqsave+0x4b/0x60
[   27.716544]  ? netup_i2c_interrupt+0x19/0x310
[   27.716863]  netup_i2c_interrupt+0x19/0x310
[   27.717178]  netup_unidvb_isr+0xd3/0x160
[   27.717467]  __handle_irq_event_percpu+0x53/0x3e0
[   27.717808]  handle_irq_event_percpu+0x35/0x90
[   27.718129]  handle_irq_event+0x39/0x60
[   27.718409]  handle_fasteoi_irq+0xc2/0x1d0
[   27.718707]  __common_interrupt+0x7f/0x150
[   27.719008]  common_interrupt+0xb4/0xd0
[   27.719289]  </IRQ>
[   27.719446]  asm_common_interrupt+0x1e/0x40
[   27.719747] RIP: 0010:native_safe_halt+0x17/0x20
[   27.720084] Code: 07 0f 00 2d 8b ee 4c 00 f4 5d c3 0f 1f 84 00 00 00 00 00 8b 05 72 95 17 02 55 48 89 e5 85 c0 7e 07 0f 00 2d 6b ee 4c 00 fb f4 <5d> c3 cc cc cc cc cc cc cc 55 48 89 e5 e8 67 53 ff ff 8b 0d 29 f6
[   27.721386] RSP: 0018:ffffc9000008fe90 EFLAGS: 00000246
[   27.721758] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000
[   27.722262] RDX: 0000000000000000 RSI: ffffffff85f7c054 RDI: ffffffff85ded4e6
[   27.722770] RBP: ffffc9000008fe90 R08: 0000000000000001 R09: 0000000000000001
[   27.723277] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff86a75408
[   27.723781] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888100260000
[   27.724289]  default_idle+0x9/0x10
[   27.724537]  arch_cpu_idle+0xa/0x10
[   27.724791]  default_idle_call+0x6e/0x250
[   27.725082]  do_idle+0x1f0/0x2d0
[   27.725326]  cpu_startup_entry+0x18/0x20
[   27.725613]  start_secondary+0x11f/0x160
[   27.725902]  secondary_startup_64_no_verify+0xb0/0xbb
[   27.726272] BUG: kernel NULL pointer dereference, address: 0000000000000002
[   27.726768] #PF: supervisor read access in kernel mode
[   27.727138] #PF: error_code(0x0000) - not-present page
[   27.727507] PGD 8000000118688067 P4D 8000000118688067 PUD 10feab067 PMD 0
[   27.727999] Oops: 0000 [#1] PREEMPT SMP PTI
[   27.728302] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 5.12.4-g70e7f0549188-dirty #169
[   27.728861] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
[   27.729660] RIP: 0010:netup_i2c_interrupt+0x23/0x310
[   27.730019] Code: 0f 1f 80 00 00 00 00 55 48 89 e5 41 55 41 54 53 48 89 fb e8 af 6e 95 fd 48 89 df e8 e7 9f 1c 01 49 89 c5 48 8b 83 48 08 00 00 <66> 44 8b 60 02 44 89 e0 48 8b 93 48 08 00 00 83 e0 f8 66 89 42 02
[   27.731339] RSP: 0018:ffffc90000118e90 EFLAGS: 00010046
[   27.731716] RAX: 0000000000000000 RBX: ffff88810803c4d8 RCX: 0000000000000000
[   27.732223] RDX: 0000000000000001 RSI: ffffffff85d37b94 RDI: ffff88810803c4d8
[   27.732727] RBP: ffffc90000118ea8 R08: 0000000000000000 R09: 0000000000000001
[   27.733239] R10: ffff88810803c4f0 R11: 61646e6f63657320 R12: 0000000000000000
[   27.733745] R13: 0000000000000046 R14: ffff888101041000 R15: ffff8881081b2400
[   27.734251] FS:  0000000000000000(0000) GS:ffff88817bc80000(0000) knlGS:0000000000000000
[   27.734821] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.735228] CR2: 0000000000000002 CR3: 0000000108194000 CR4: 00000000000006e0
[   27.735735] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.736241] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   27.736744] Call Trace:
[   27.736924]  <IRQ>
[   27.737074]  netup_unidvb_isr+0xd3/0x160
[   27.737363]  __handle_irq_event_percpu+0x53/0x3e0
[   27.737706]  handle_irq_event_percpu+0x35/0x90
[   27.738028]  handle_irq_event+0x39/0x60
[   27.738306]  handle_fasteoi_irq+0xc2/0x1d0
[   27.738602]  __common_interrupt+0x7f/0x150
[   27.738899]  common_interrupt+0xb4/0xd0
[   27.739176]  </IRQ>
[   27.739331]  asm_common_interrupt+0x1e/0x40
[   27.739633] RIP: 0010:native_safe_halt+0x17/0x20
[   27.739967] Code: 07 0f 00 2d 8b ee 4c 00 f4 5d c3 0f 1f 84 00 00 00 00 00 8b 05 72 95 17 02 55 48 89 e5 85 c0 7e 07 0f 00 2d 6b ee 4c 00 fb f4 <5d> c3 cc cc cc cc cc cc cc 55 48 89 e5 e8 67 53 ff ff 8b 0d 29 f6
[   27.741275] RSP: 0018:ffffc9000008fe90 EFLAGS: 00000246
[   27.741647] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000
[   27.742148] RDX: 0000000000000000 RSI: ffffffff85f7c054 RDI: ffffffff85ded4e6
[   27.742652] RBP: ffffc9000008fe90 R08: 0000000000000001 R09: 0000000000000001
[   27.743154] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff86a75408
[   27.743652] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888100260000
[   27.744157]  default_idle+0x9/0x10
[   27.744405]  arch_cpu_idle+0xa/0x10
[   27.744658]  default_idle_call+0x6e/0x250
[   27.744948]  do_idle+0x1f0/0x2d0
[   27.745190]  cpu_startup_entry+0x18/0x20
[   27.745475]  start_secondary+0x11f/0x160
[   27.745761]  secondary_startup_64_no_verify+0xb0/0xbb
[   27.746123] Modules linked in:
[   27.746348] Dumping ftrace buffer:
[   27.746596]    (ftrace buffer empty)
[   27.746852] CR2: 0000000000000002
[   27.747094] ---[ end trace ebafd46f83ab946d ]---
[   27.747424] RIP: 0010:netup_i2c_interrupt+0x23/0x310
[   27.747778] Code: 0f 1f 80 00 00 00 00 55 48 89 e5 41 55 41 54 53 48 89 fb e8 af 6e 95 fd 48 89 df e8 e7 9f 1c 01 49 89 c5 48 8b 83 48 08 00 00 <66> 44 8b 60 02 44 89 e0 48 8b 93 48 08 00 00 83 e0 f8 66 89 42 02
[   27.749082] RSP: 0018:ffffc90000118e90 EFLAGS: 00010046
[   27.749461] RAX: 0000000000000000 RBX: ffff88810803c4d8 RCX: 0000000000000000
[   27.749966] RDX: 0000000000000001 RSI: ffffffff85d37b94 RDI: ffff88810803c4d8
[   27.750471] RBP: ffffc90000118ea8 R08: 0000000000000000 R09: 0000000000000001
[   27.750976] R10: ffff88810803c4f0 R11: 61646e6f63657320 R12: 0000000000000000
[   27.751480] R13: 0000000000000046 R14: ffff888101041000 R15: ffff8881081b2400
[   27.751986] FS:  0000000000000000(0000) GS:ffff88817bc80000(0000) knlGS:0000000000000000
[   27.752560] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   27.752970] CR2: 0000000000000002 CR3: 0000000108194000 CR4: 00000000000006e0
[   27.753481] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   27.753984] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   27.754487] Kernel panic - not syncing: Fatal exception in interrupt
[   27.755033] Dumping ftrace buffer:
[   27.755279]    (ftrace buffer empty)
[   27.755534] Kernel Offset: disabled
[   27.755785] Rebooting in 1 seconds..

Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 .../pci/netup_unidvb/netup_unidvb_core.c      | 27 +++++++++++--------
 1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/drivers/media/pci/netup_unidvb/netup_unidvb_core.c b/drivers/media/pci/netup_unidvb/netup_unidvb_core.c
index ead59fabd15ff..de3fc62810e6c 100644
--- a/drivers/media/pci/netup_unidvb/netup_unidvb_core.c
+++ b/drivers/media/pci/netup_unidvb/netup_unidvb_core.c
@@ -267,19 +267,24 @@ static irqreturn_t netup_unidvb_isr(int irq, void *dev_id)
 	if ((reg40 & AVL_IRQ_ASSERTED) != 0) {
 		/* IRQ is being signaled */
 		reg_isr = readw(ndev->bmmio0 + REG_ISR);
-		if (reg_isr & NETUP_UNIDVB_IRQ_I2C0) {
-			iret = netup_i2c_interrupt(&ndev->i2c[0]);
-		} else if (reg_isr & NETUP_UNIDVB_IRQ_I2C1) {
-			iret = netup_i2c_interrupt(&ndev->i2c[1]);
-		} else if (reg_isr & NETUP_UNIDVB_IRQ_SPI) {
+		if (reg_isr & NETUP_UNIDVB_IRQ_SPI)
 			iret = netup_spi_interrupt(ndev->spi);
-		} else if (reg_isr & NETUP_UNIDVB_IRQ_DMA1) {
-			iret = netup_dma_interrupt(&ndev->dma[0]);
-		} else if (reg_isr & NETUP_UNIDVB_IRQ_DMA2) {
-			iret = netup_dma_interrupt(&ndev->dma[1]);
-		} else if (reg_isr & NETUP_UNIDVB_IRQ_CI) {
-			iret = netup_ci_interrupt(ndev);
+		else if (!ndev->old_fw) {
+			if (reg_isr & NETUP_UNIDVB_IRQ_I2C0) {
+				iret = netup_i2c_interrupt(&ndev->i2c[0]);
+			} else if (reg_isr & NETUP_UNIDVB_IRQ_I2C1) {
+				iret = netup_i2c_interrupt(&ndev->i2c[1]);
+			} else if (reg_isr & NETUP_UNIDVB_IRQ_DMA1) {
+				iret = netup_dma_interrupt(&ndev->dma[0]);
+			} else if (reg_isr & NETUP_UNIDVB_IRQ_DMA2) {
+				iret = netup_dma_interrupt(&ndev->dma[1]);
+			} else if (reg_isr & NETUP_UNIDVB_IRQ_CI) {
+				iret = netup_ci_interrupt(ndev);
+			} else {
+				goto err;
+			}
 		} else {
+err:
 			dev_err(&pci_dev->dev,
 				"%s(): unknown interrupt 0x%x\n",
 				__func__, reg_isr);
-- 
2.33.0

[PATCH AUTOSEL 4.19 16/47] media: uvcvideo: Set capability in s_param

[Sasha Levin]

From: Ricardo Ribalda <ribalda@chromium.org>

[ Upstream commit 97a2777a96070afb7da5d587834086c0b586c8cc ]

Fixes v4l2-compliance:

Format ioctls (Input 0):
                warn: v4l2-test-formats.cpp(1339): S_PARM is supported but doesn't report V4L2_CAP_TIMEPERFRAME
                fail: v4l2-test-formats.cpp(1241): node->has_frmintervals && !cap->capability

Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/usb/uvc/uvc_v4l2.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index 2ca1e8ce6159d..e858f4f189ed9 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -474,10 +474,13 @@ static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
 	uvc_simplify_fraction(&timeperframe.numerator,
 		&timeperframe.denominator, 8, 333);
 
-	if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+	if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 		parm->parm.capture.timeperframe = timeperframe;
-	else
+		parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+	} else {
 		parm->parm.output.timeperframe = timeperframe;
+		parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
+	}
 
 	return 0;
 }
-- 
2.33.0

[PATCH AUTOSEL 4.19 17/47] media: uvcvideo: Return -EIO for control errors

[Sasha Levin]

From: Ricardo Ribalda <ribalda@chromium.org>

[ Upstream commit ffccdde5f0e17d2f0d788a9d831a027187890eaa ]

The device is doing something unexpected with the control. Either because
the protocol is not properly implemented or there has been a HW error.

Fixes v4l2-compliance:

Control ioctls (Input 0):
                fail: v4l2-test-controls.cpp(448): s_ctrl returned an error (22)
        test VIDIOC_G/S_CTRL: FAIL
                fail: v4l2-test-controls.cpp(698): s_ext_ctrls returned an error (22)
        test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL

Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/usb/uvc/uvc_video.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index 56b058d60a0dc..9c26e586bb01d 100644
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -117,6 +117,11 @@ int uvc_query_ctrl(struct uvc_device *dev, u8 query, u8 unit,
 	case 5: /* Invalid unit */
 	case 6: /* Invalid control */
 	case 7: /* Invalid Request */
+		/*
+		 * The firmware has not properly implemented
+		 * the control or there has been a HW error.
+		 */
+		return -EIO;
 	case 8: /* Invalid value within range */
 		return -EINVAL;
 	default: /* reserved or unknown */
-- 
2.33.0

[PATCH AUTOSEL 4.19 18/47] media: s5p-mfc: fix possible null-pointer dereference in s5p_mfc_probe()

[Sasha Levin]

From: Tuo Li <islituo@gmail.com>

[ Upstream commit 8515965e5e33f4feb56134348c95953f3eadfb26 ]

The variable pdev is assigned to dev->plat_dev, and dev->plat_dev is
checked in:
  if (!dev->plat_dev)

This indicates both dev->plat_dev and pdev can be NULL. If so, the
function dev_err() is called to print error information.
  dev_err(&pdev->dev, "No platform data specified\n");

However, &pdev->dev is an illegal address, and it is dereferenced in
dev_err().

To fix this possible null-pointer dereference, replace dev_err() with
mfc_err().

Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Tuo Li <islituo@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/platform/s5p-mfc/s5p_mfc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
index 4b8516c35bc20..80bb58d31c3f6 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -1276,7 +1276,7 @@ static int s5p_mfc_probe(struct platform_device *pdev)
 	spin_lock_init(&dev->condlock);
 	dev->plat_dev = pdev;
 	if (!dev->plat_dev) {
-		dev_err(&pdev->dev, "No platform data specified\n");
+		mfc_err("No platform data specified\n");
 		return -ENODEV;
 	}
 
-- 
2.33.0

[PATCH AUTOSEL 4.19 19/47] media: s5p-mfc: Add checking to s5p_mfc_probe().

[Sasha Levin]

From: Nadezda Lutovinova <lutovinova@ispras.ru>

[ Upstream commit cdfaf4752e6915a4b455ad4400133e540e4dc965 ]

If of_device_get_match_data() return NULL,
then null pointer dereference occurs in  s5p_mfc_init_pm().
The patch adds checking if dev->variant is NULL.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Nadezda Lutovinova <lutovinova@ispras.ru>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/platform/s5p-mfc/s5p_mfc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
index 80bb58d31c3f6..0fc101bc58d67 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -1281,6 +1281,10 @@ static int s5p_mfc_probe(struct platform_device *pdev)
 	}
 
 	dev->variant = of_device_get_match_data(&pdev->dev);
+	if (!dev->variant) {
+		dev_err(&pdev->dev, "Failed to get device MFC hardware variant information\n");
+		return -ENOENT;
+	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	dev->regs_base = devm_ioremap_resource(&pdev->dev, res);
-- 
2.33.0

[PATCH AUTOSEL 4.19 20/47] media: mceusb: return without resubmitting URB in case of -EPROTO error.

[Sasha Levin]

From: Rajat Asthana <rajatasthana4@gmail.com>

[ Upstream commit 476db72e521983ecb847e4013b263072bb1110fc ]

Syzkaller reported a warning called "rcu detected stall in dummy_timer".

The error seems to be an error in mceusb_dev_recv(). In the case of
-EPROTO error, the routine immediately resubmits the URB. Instead it
should return without resubmitting URB.

Reported-by: syzbot+4d3749e9612c2cfab956@syzkaller.appspotmail.com
Signed-off-by: Rajat Asthana <rajatasthana4@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/rc/mceusb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/rc/mceusb.c b/drivers/media/rc/mceusb.c
index 845583e2af4d5..cf4bcf7c62f2e 100644
--- a/drivers/media/rc/mceusb.c
+++ b/drivers/media/rc/mceusb.c
@@ -1323,6 +1323,7 @@ static void mceusb_dev_recv(struct urb *urb)
 	case -ECONNRESET:
 	case -ENOENT:
 	case -EILSEQ:
+	case -EPROTO:
 	case -ESHUTDOWN:
 		usb_unlink_urb(urb);
 		return;
-- 
2.33.0

[PATCH AUTOSEL 4.19 21/47] ia64: don't do IA64_CMPXCHG_DEBUG without CONFIG_PRINTK

[Sasha Levin]

From: Randy Dunlap <rdunlap@infradead.org>

[ Upstream commit c15b5fc054c3d6c97e953617605235c5cb8ce979 ]

When CONFIG_PRINTK is not set, the CMPXCHG_BUGCHECK() macro calls
_printk(), but _printk() is a static inline function, not available
as an extern.
Since the purpose of the macro is to print the BUGCHECK info,
make this config option depend on PRINTK.

Fixes multiple occurrences of this build error:

../include/linux/printk.h:208:5: error: static declaration of '_printk' follows non-static declaration
  208 | int _printk(const char *s, ...)
      |     ^~~~~~~
In file included from ../arch/ia64/include/asm/cmpxchg.h:5,
../arch/ia64/include/uapi/asm/cmpxchg.h:146:28: note: previous declaration of '_printk' with type 'int(const char *, ...)'
  146 |                 extern int _printk(const char *fmt, ...);

Cc: linux-ia64@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Chris Down <chris@chrisdown.name>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/ia64/Kconfig.debug | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/ia64/Kconfig.debug b/arch/ia64/Kconfig.debug
index 1371efc9b0055..637ac79c29b6d 100644
--- a/arch/ia64/Kconfig.debug
+++ b/arch/ia64/Kconfig.debug
@@ -39,7 +39,7 @@ config DISABLE_VHPT
 
 config IA64_DEBUG_CMPXCHG
 	bool "Turn on compare-and-exchange bug checking (slow!)"
-	depends on DEBUG_KERNEL
+	depends on DEBUG_KERNEL && PRINTK
 	help
 	  Selecting this option turns on bug checking for the IA-64
 	  compare-and-exchange instructions.  This is slow!  Itaniums
-- 
2.33.0

[PATCH AUTOSEL 4.19 22/47] media: rcar-csi2: Add checking to rcsi2_start_receiver()

[Sasha Levin]

From: Nadezda Lutovinova <lutovinova@ispras.ru>

[ Upstream commit fc41665498332ad394b7db37f23e9394096ddc71 ]

If rcsi2_code_to_fmt() return NULL, then null pointer dereference occurs
in the next cycle. That should not be possible now but adding checking
protects from future bugs.
The patch adds checking if format is NULL.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Nadezda Lutovinova <lutovinova@ispras.ru>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/platform/rcar-vin/rcar-csi2.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/media/platform/rcar-vin/rcar-csi2.c b/drivers/media/platform/rcar-vin/rcar-csi2.c
index dc5ae8025832a..23f55514b002a 100644
--- a/drivers/media/platform/rcar-vin/rcar-csi2.c
+++ b/drivers/media/platform/rcar-vin/rcar-csi2.c
@@ -474,6 +474,8 @@ static int rcsi2_start(struct rcar_csi2 *priv)
 
 	/* Code is validated in set_fmt. */
 	format = rcsi2_code_to_fmt(priv->mf.code);
+	if (!format)
+		return -EINVAL;
 
 	/*
 	 * Enable all Virtual Channels.
-- 
2.33.0

[PATCH AUTOSEL 4.19 23/47] ACPICA: Avoid evaluating methods too early during system resume

[Sasha Levin]

From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>

[ Upstream commit d3c4b6f64ad356c0d9ddbcf73fa471e6a841cc5c ]

ACPICA commit 0762982923f95eb652cf7ded27356b247c9774de

During wakeup from system-wide sleep states, acpi_get_sleep_type_data()
is called and it tries to get memory from the slab allocator in order
to evaluate a control method, but if KFENCE is enabled in the kernel,
the memory allocation attempt causes an IRQ work to be queued and a
self-IPI to be sent to the CPU running the code which requires the
memory controller to be ready, so if that happens too early in the
wakeup path, it doesn't work.

Prevent that from taking place by calling acpi_get_sleep_type_data()
for S0 upfront, when preparing to enter a given sleep state, and
saving the data obtained by it for later use during system wakeup.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=214271
Reported-by: Reik Keutterling <spielkind@gmail.com>
Tested-by: Reik Keutterling <spielkind@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/acpi/acpica/acglobal.h  |  2 ++
 drivers/acpi/acpica/hwesleep.c  |  8 ++------
 drivers/acpi/acpica/hwsleep.c   | 11 ++++-------
 drivers/acpi/acpica/hwxfsleep.c |  7 +++++++
 4 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index 1e6204518496c..38712fa4dd9d2 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -224,6 +224,8 @@ extern struct acpi_bit_register_info
     acpi_gbl_bit_register_info[ACPI_NUM_BITREG];
 ACPI_GLOBAL(u8, acpi_gbl_sleep_type_a);
 ACPI_GLOBAL(u8, acpi_gbl_sleep_type_b);
+ACPI_GLOBAL(u8, acpi_gbl_sleep_type_a_s0);
+ACPI_GLOBAL(u8, acpi_gbl_sleep_type_b_s0);
 
 /*****************************************************************************
  *
diff --git a/drivers/acpi/acpica/hwesleep.c b/drivers/acpi/acpica/hwesleep.c
index e0ad3f11142e4..9516966124ae3 100644
--- a/drivers/acpi/acpica/hwesleep.c
+++ b/drivers/acpi/acpica/hwesleep.c
@@ -147,17 +147,13 @@ acpi_status acpi_hw_extended_sleep(u8 sleep_state)
 
 acpi_status acpi_hw_extended_wake_prep(u8 sleep_state)
 {
-	acpi_status status;
 	u8 sleep_type_value;
 
 	ACPI_FUNCTION_TRACE(hw_extended_wake_prep);
 
-	status = acpi_get_sleep_type_data(ACPI_STATE_S0,
-					  &acpi_gbl_sleep_type_a,
-					  &acpi_gbl_sleep_type_b);
-	if (ACPI_SUCCESS(status)) {
+	if (acpi_gbl_sleep_type_a_s0 != ACPI_SLEEP_TYPE_INVALID) {
 		sleep_type_value =
-		    ((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) &
+		    ((acpi_gbl_sleep_type_a_s0 << ACPI_X_SLEEP_TYPE_POSITION) &
 		     ACPI_X_SLEEP_TYPE_MASK);
 
 		(void)acpi_write((u64)(sleep_type_value | ACPI_X_SLEEP_ENABLE),
diff --git a/drivers/acpi/acpica/hwsleep.c b/drivers/acpi/acpica/hwsleep.c
index d8b8fc2ff5633..f4282370947c8 100644
--- a/drivers/acpi/acpica/hwsleep.c
+++ b/drivers/acpi/acpica/hwsleep.c
@@ -179,7 +179,7 @@ acpi_status acpi_hw_legacy_sleep(u8 sleep_state)
 
 acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state)
 {
-	acpi_status status;
+	acpi_status status = AE_OK;
 	struct acpi_bit_register_info *sleep_type_reg_info;
 	struct acpi_bit_register_info *sleep_enable_reg_info;
 	u32 pm1a_control;
@@ -192,10 +192,7 @@ acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state)
 	 * This is unclear from the ACPI Spec, but it is required
 	 * by some machines.
 	 */
-	status = acpi_get_sleep_type_data(ACPI_STATE_S0,
-					  &acpi_gbl_sleep_type_a,
-					  &acpi_gbl_sleep_type_b);
-	if (ACPI_SUCCESS(status)) {
+	if (acpi_gbl_sleep_type_a_s0 != ACPI_SLEEP_TYPE_INVALID) {
 		sleep_type_reg_info =
 		    acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE);
 		sleep_enable_reg_info =
@@ -216,9 +213,9 @@ acpi_status acpi_hw_legacy_wake_prep(u8 sleep_state)
 
 			/* Insert the SLP_TYP bits */
 
-			pm1a_control |= (acpi_gbl_sleep_type_a <<
+			pm1a_control |= (acpi_gbl_sleep_type_a_s0 <<
 					 sleep_type_reg_info->bit_position);
-			pm1b_control |= (acpi_gbl_sleep_type_b <<
+			pm1b_control |= (acpi_gbl_sleep_type_b_s0 <<
 					 sleep_type_reg_info->bit_position);
 
 			/* Write the control registers and ignore any errors */
diff --git a/drivers/acpi/acpica/hwxfsleep.c b/drivers/acpi/acpica/hwxfsleep.c
index 3f22f7dd4556d..dc1e44ccaae20 100644
--- a/drivers/acpi/acpica/hwxfsleep.c
+++ b/drivers/acpi/acpica/hwxfsleep.c
@@ -288,6 +288,13 @@ acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
 		return_ACPI_STATUS(status);
 	}
 
+	status = acpi_get_sleep_type_data(ACPI_STATE_S0,
+					  &acpi_gbl_sleep_type_a_s0,
+					  &acpi_gbl_sleep_type_b_s0);
+	if (ACPI_FAILURE(status)) {
+		acpi_gbl_sleep_type_a_s0 = ACPI_SLEEP_TYPE_INVALID;
+	}
+
 	/* Execute the _PTS method (Prepare To Sleep) */
 
 	arg_list.count = 1;
-- 
2.33.0

[PATCH AUTOSEL 4.19 24/47] media: usb: dvd-usb: fix uninit-value bug in dibusb_read_eeprom_byte()

[Sasha Levin]

From: Anant Thazhemadam <anant.thazhemadam@gmail.com>

[ Upstream commit 899a61a3305d49e8a712e9ab20d0db94bde5929f ]

In dibusb_read_eeprom_byte(), if dibusb_i2c_msg() fails, val gets
assigned an value that's not properly initialized.
Using kzalloc() in place of kmalloc() for the buffer fixes this issue,
as the val can now be set to 0 in the event dibusb_i2c_msg() fails.

Reported-by: syzbot+e27b4fd589762b0b9329@syzkaller.appspotmail.com
Tested-by: syzbot+e27b4fd589762b0b9329@syzkaller.appspotmail.com
Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/usb/dvb-usb/dibusb-common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/usb/dvb-usb/dibusb-common.c b/drivers/media/usb/dvb-usb/dibusb-common.c
index fb1b4f2d5f9de..85b7838b3ede3 100644
--- a/drivers/media/usb/dvb-usb/dibusb-common.c
+++ b/drivers/media/usb/dvb-usb/dibusb-common.c
@@ -226,7 +226,7 @@ int dibusb_read_eeprom_byte(struct dvb_usb_device *d, u8 offs, u8 *val)
 	u8 *buf;
 	int rc;
 
-	buf = kmalloc(2, GFP_KERNEL);
+	buf = kzalloc(2, GFP_KERNEL);
 	if (!buf)
 		return -ENOMEM;
 
-- 
2.33.0

[PATCH AUTOSEL 4.19 25/47] tracefs: Have tracefs directories not set OTH permission bits by default

[Sasha Levin]

From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>

[ Upstream commit 49d67e445742bbcb03106b735b2ab39f6e5c56bc ]

The tracefs file system is by default mounted such that only root user can
access it. But there are legitimate reasons to create a group and allow
those added to the group to have access to tracing. By changing the
permissions of the tracefs mount point to allow access, it will allow
group access to the tracefs directory.

There should not be any real reason to allow all access to the tracefs
directory as it contains sensitive information. Have the default
permission of directories being created not have any OTH (other) bits set,
such that an admin that wants to give permission to a group has to first
disable all OTH bits in the file system.

Link: https://lkml.kernel.org/r/20210818153038.664127804@goodmis.org

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/tracefs/inode.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c
index 7098c49f36934..990f794b1dd0a 100644
--- a/fs/tracefs/inode.c
+++ b/fs/tracefs/inode.c
@@ -427,7 +427,8 @@ static struct dentry *__create_dir(const char *name, struct dentry *parent,
 	if (unlikely(!inode))
 		return failed_creating(dentry);
 
-	inode->i_mode = S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO;
+	/* Do not set bits for OTH */
+	inode->i_mode = S_IFDIR | S_IRWXU | S_IRUSR| S_IRGRP | S_IXUSR | S_IXGRP;
 	inode->i_op = ops;
 	inode->i_fop = &simple_dir_operations;
 
-- 
2.33.0

[PATCH AUTOSEL 4.19 26/47] ath: dfs_pattern_detector: Fix possible null-pointer dereference in channel_detector_create()

[Sasha Levin]

From: Tuo Li <islituo@gmail.com>

[ Upstream commit 4b6012a7830b813799a7faf40daa02a837e0fd5b ]

kzalloc() is used to allocate memory for cd->detectors, and if it fails,
channel_detector_exit() behind the label fail will be called:
  channel_detector_exit(dpd, cd);

In channel_detector_exit(), cd->detectors is dereferenced through:
  struct pri_detector *de = cd->detectors[i];

To fix this possible null-pointer dereference, check cd->detectors before
the for loop to dereference cd->detectors.

Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Tuo Li <islituo@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210805153854.154066-1-islituo@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/ath/dfs_pattern_detector.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/ath/dfs_pattern_detector.c b/drivers/net/wireless/ath/dfs_pattern_detector.c
index a274eb0d19688..a0ad6e48a35b4 100644
--- a/drivers/net/wireless/ath/dfs_pattern_detector.c
+++ b/drivers/net/wireless/ath/dfs_pattern_detector.c
@@ -182,10 +182,12 @@ static void channel_detector_exit(struct dfs_pattern_detector *dpd,
 	if (cd == NULL)
 		return;
 	list_del(&cd->head);
-	for (i = 0; i < dpd->num_radar_types; i++) {
-		struct pri_detector *de = cd->detectors[i];
-		if (de != NULL)
-			de->exit(de);
+	if (cd->detectors) {
+		for (i = 0; i < dpd->num_radar_types; i++) {
+			struct pri_detector *de = cd->detectors[i];
+			if (de != NULL)
+				de->exit(de);
+		}
 	}
 	kfree(cd->detectors);
 	kfree(cd);
-- 
2.33.0

[PATCH AUTOSEL 4.19 27/47] ACPI: battery: Accept charges over the design capacity as full

[Sasha Levin]

From: André Almeida <andrealmeid@collabora.com>

[ Upstream commit 2835f327bd1240508db2c89fe94a056faa53c49a ]

Some buggy firmware and/or brand new batteries can support a charge that's
slightly over the reported design capacity. In such cases, the kernel will
report to userspace that the charging state of the battery is "Unknown",
when in reality the battery charge is "Full", at least from the design
capacity point of view. Make the fallback condition accepts capacities
over the designed capacity so userspace knows that is full.

Signed-off-by: André Almeida <andrealmeid@collabora.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/acpi/battery.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 674a0e92b798f..0bbf8b453ebf2 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -198,7 +198,7 @@ static int acpi_battery_is_charged(struct acpi_battery *battery)
 		return 1;
 
 	/* fallback to using design values for broken batteries */
-	if (battery->design_capacity == battery->capacity_now)
+	if (battery->design_capacity <= battery->capacity_now)
 		return 1;
 
 	/* we don't do any sort of metric based on percentages */
-- 
2.33.0

[PATCH AUTOSEL 4.19 28/47] leaking_addresses: Always print a trailing newline

[Sasha Levin]

From: Kees Cook <keescook@chromium.org>

[ Upstream commit cf2a85efdade117e2169d6e26641016cbbf03ef0 ]

For files that lack trailing newlines and match a leaking address (e.g.
wchan[1]), the leaking_addresses.pl report would run together with the
next line, making things look corrupted.

Unconditionally remove the newline on input, and write it back out on
output.

[1] https://lore.kernel.org/all/20210103142726.GC30643@xsang-OptiPlex-9020/

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20211008111626.151570317@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 scripts/leaking_addresses.pl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/leaking_addresses.pl b/scripts/leaking_addresses.pl
index 6a897788f5a7e..6e4b0f7ae38cf 100755
--- a/scripts/leaking_addresses.pl
+++ b/scripts/leaking_addresses.pl
@@ -456,8 +456,9 @@ sub parse_file
 
 	open my $fh, "<", $file or return;
 	while ( <$fh> ) {
+		chomp;
 		if (may_leak_address($_)) {
-			print $file . ': ' . $_;
+			printf("$file: $_\n");
 		}
 	}
 	close $fh;
-- 
2.33.0

[PATCH AUTOSEL 4.19 29/47] memstick: r592: Fix a UAF bug when removing the driver

[Sasha Levin]

From: Zheyu Ma <zheyuma97@gmail.com>

[ Upstream commit 738216c1953e802aa9f930c5d15b8f9092c847ff ]

In r592_remove(), the driver will free dma after freeing the host, which
may cause a UAF bug.

The following log reveals it:

[   45.361796 ] BUG: KASAN: use-after-free in r592_remove+0x269/0x350 [r592]
[   45.364286 ] Call Trace:
[   45.364472 ]  dump_stack_lvl+0xa8/0xd1
[   45.364751 ]  print_address_description+0x87/0x3b0
[   45.365137 ]  kasan_report+0x172/0x1c0
[   45.365415 ]  ? r592_remove+0x269/0x350 [r592]
[   45.365834 ]  ? r592_remove+0x269/0x350 [r592]
[   45.366168 ]  __asan_report_load8_noabort+0x14/0x20
[   45.366531 ]  r592_remove+0x269/0x350 [r592]
[   45.378785 ]
[   45.378903 ] Allocated by task 4674:
[   45.379162 ]  ____kasan_kmalloc+0xb5/0xe0
[   45.379455 ]  __kasan_kmalloc+0x9/0x10
[   45.379730 ]  __kmalloc+0x150/0x280
[   45.379984 ]  memstick_alloc_host+0x2a/0x190
[   45.380664 ]
[   45.380781 ] Freed by task 5509:
[   45.381014 ]  kasan_set_track+0x3d/0x70
[   45.381293 ]  kasan_set_free_info+0x23/0x40
[   45.381635 ]  ____kasan_slab_free+0x10b/0x140
[   45.381950 ]  __kasan_slab_free+0x11/0x20
[   45.382241 ]  slab_free_freelist_hook+0x81/0x150
[   45.382575 ]  kfree+0x13e/0x290
[   45.382805 ]  memstick_free+0x1c/0x20
[   45.383070 ]  device_release+0x9c/0x1d0
[   45.383349 ]  kobject_put+0x2ef/0x4c0
[   45.383616 ]  put_device+0x1f/0x30
[   45.383865 ]  memstick_free_host+0x24/0x30
[   45.384162 ]  r592_remove+0x242/0x350 [r592]
[   45.384473 ]  pci_device_remove+0xa9/0x250

Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Link: https://lore.kernel.org/r/1634383581-11055-1-git-send-email-zheyuma97@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/memstick/host/r592.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/memstick/host/r592.c b/drivers/memstick/host/r592.c
index 4559593ecd5a9..4728a42d54b88 100644
--- a/drivers/memstick/host/r592.c
+++ b/drivers/memstick/host/r592.c
@@ -840,15 +840,15 @@ static void r592_remove(struct pci_dev *pdev)
 	}
 	memstick_remove_host(dev->host);
 
+	if (dev->dummy_dma_page)
+		dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->dummy_dma_page,
+			dev->dummy_dma_page_physical_address);
+
 	free_irq(dev->irq, dev);
 	iounmap(dev->mmio);
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);
 	memstick_free_host(dev->host);
-
-	if (dev->dummy_dma_page)
-		dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->dummy_dma_page,
-			dev->dummy_dma_page_physical_address);
 }
 
 #ifdef CONFIG_PM_SLEEP
-- 
2.33.0

[PATCH AUTOSEL 4.19 30/47] lib/xz: Avoid overlapping memcpy() with invalid input with in-place decompression

[Sasha Levin]

From: Lasse Collin <lasse.collin@tukaani.org>

[ Upstream commit 83d3c4f22a36d005b55f44628f46cc0d319a75e8 ]

With valid files, the safety margin described in lib/decompress_unxz.c
ensures that these buffers cannot overlap. But if the uncompressed size
of the input is larger than the caller thought, which is possible when
the input file is invalid/corrupt, the buffers can overlap. Obviously
the result will then be garbage (and usually the decoder will return
an error too) but no other harm will happen when such an over-run occurs.

This change only affects uncompressed LZMA2 chunks and so this
should have no effect on performance.

Link: https://lore.kernel.org/r/20211010213145.17462-2-xiang@kernel.org
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 lib/decompress_unxz.c |  2 +-
 lib/xz/xz_dec_lzma2.c | 21 +++++++++++++++++++--
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/lib/decompress_unxz.c b/lib/decompress_unxz.c
index 25d59a95bd668..abea25310ac73 100644
--- a/lib/decompress_unxz.c
+++ b/lib/decompress_unxz.c
@@ -167,7 +167,7 @@
  * memeq and memzero are not used much and any remotely sane implementation
  * is fast enough. memcpy/memmove speed matters in multi-call mode, but
  * the kernel image is decompressed in single-call mode, in which only
- * memcpy speed can matter and only if there is a lot of uncompressible data
+ * memmove speed can matter and only if there is a lot of uncompressible data
  * (LZMA2 stores uncompressible chunks in uncompressed form). Thus, the
  * functions below should just be kept small; it's probably not worth
  * optimizing for speed.
diff --git a/lib/xz/xz_dec_lzma2.c b/lib/xz/xz_dec_lzma2.c
index 08c3c80499983..2c5197d6b944d 100644
--- a/lib/xz/xz_dec_lzma2.c
+++ b/lib/xz/xz_dec_lzma2.c
@@ -387,7 +387,14 @@ static void dict_uncompressed(struct dictionary *dict, struct xz_buf *b,
 
 		*left -= copy_size;
 
-		memcpy(dict->buf + dict->pos, b->in + b->in_pos, copy_size);
+		/*
+		 * If doing in-place decompression in single-call mode and the
+		 * uncompressed size of the file is larger than the caller
+		 * thought (i.e. it is invalid input!), the buffers below may
+		 * overlap and cause undefined behavior with memcpy().
+		 * With valid inputs memcpy() would be fine here.
+		 */
+		memmove(dict->buf + dict->pos, b->in + b->in_pos, copy_size);
 		dict->pos += copy_size;
 
 		if (dict->full < dict->pos)
@@ -397,7 +404,11 @@ static void dict_uncompressed(struct dictionary *dict, struct xz_buf *b,
 			if (dict->pos == dict->end)
 				dict->pos = 0;
 
-			memcpy(b->out + b->out_pos, b->in + b->in_pos,
+			/*
+			 * Like above but for multi-call mode: use memmove()
+			 * to avoid undefined behavior with invalid input.
+			 */
+			memmove(b->out + b->out_pos, b->in + b->in_pos,
 					copy_size);
 		}
 
@@ -421,6 +432,12 @@ static uint32_t dict_flush(struct dictionary *dict, struct xz_buf *b)
 		if (dict->pos == dict->end)
 			dict->pos = 0;
 
+		/*
+		 * These buffers cannot overlap even if doing in-place
+		 * decompression because in multi-call mode dict->buf
+		 * has been allocated by us in this file; it's not
+		 * provided by the caller like in single-call mode.
+		 */
 		memcpy(b->out + b->out_pos, dict->buf + dict->start,
 				copy_size);
 	}
-- 
2.33.0

[PATCH AUTOSEL 4.19 31/47] lib/xz: Validate the value before assigning it to an enum variable

[Sasha Levin]

From: Lasse Collin <lasse.collin@tukaani.org>

[ Upstream commit 4f8d7abaa413c34da9d751289849dbfb7c977d05 ]

This might matter, for example, if the underlying type of enum xz_check
was a signed char. In such a case the validation wouldn't have caught an
unsupported header. I don't know if this problem can occur in the kernel
on any arch but it's still good to fix it because some people might copy
the XZ code to their own projects from Linux instead of the upstream
XZ Embedded repository.

This change may increase the code size by a few bytes. An alternative
would have been to use an unsigned int instead of enum xz_check but
using an enumeration looks cleaner.

Link: https://lore.kernel.org/r/20211010213145.17462-3-xiang@kernel.org
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 lib/xz/xz_dec_stream.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/xz/xz_dec_stream.c b/lib/xz/xz_dec_stream.c
index bd1d182419d7e..0b161f90d8d80 100644
--- a/lib/xz/xz_dec_stream.c
+++ b/lib/xz/xz_dec_stream.c
@@ -402,12 +402,12 @@ static enum xz_ret dec_stream_header(struct xz_dec *s)
 	 * we will accept other check types too, but then the check won't
 	 * be verified and a warning (XZ_UNSUPPORTED_CHECK) will be given.
 	 */
+	if (s->temp.buf[HEADER_MAGIC_SIZE + 1] > XZ_CHECK_MAX)
+		return XZ_OPTIONS_ERROR;
+
 	s->check_type = s->temp.buf[HEADER_MAGIC_SIZE + 1];
 
 #ifdef XZ_DEC_ANY_CHECK
-	if (s->check_type > XZ_CHECK_MAX)
-		return XZ_OPTIONS_ERROR;
-
 	if (s->check_type > XZ_CHECK_CRC32)
 		return XZ_UNSUPPORTED_CHECK;
 #else
-- 
2.33.0

[PATCH AUTOSEL 4.19 32/47] workqueue: make sysfs of unbound kworker cpumask more clever

[Sasha Levin]

From: Menglong Dong <imagedong@tencent.com>

[ Upstream commit d25302e46592c97d29f70ccb1be558df31a9a360 ]

Some unfriendly component, such as dpdk, write the same mask to
unbound kworker cpumask again and again. Every time it write to
this interface some work is queue to cpu, even though the mask
is same with the original mask.

So, fix it by return success and do nothing if the cpumask is
equal with the old one.

Signed-off-by: Mengen Sun <mengensun@tencent.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/workqueue.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 1573d1bf63007..b1bb6cb5802ec 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -5125,9 +5125,6 @@ int workqueue_set_unbound_cpumask(cpumask_var_t cpumask)
 	int ret = -EINVAL;
 	cpumask_var_t saved_cpumask;
 
-	if (!zalloc_cpumask_var(&saved_cpumask, GFP_KERNEL))
-		return -ENOMEM;
-
 	/*
 	 * Not excluding isolated cpus on purpose.
 	 * If the user wishes to include them, we allow that.
@@ -5135,6 +5132,15 @@ int workqueue_set_unbound_cpumask(cpumask_var_t cpumask)
 	cpumask_and(cpumask, cpumask, cpu_possible_mask);
 	if (!cpumask_empty(cpumask)) {
 		apply_wqattrs_lock();
+		if (cpumask_equal(cpumask, wq_unbound_cpumask)) {
+			ret = 0;
+			goto out_unlock;
+		}
+
+		if (!zalloc_cpumask_var(&saved_cpumask, GFP_KERNEL)) {
+			ret = -ENOMEM;
+			goto out_unlock;
+		}
 
 		/* save the old wq_unbound_cpumask. */
 		cpumask_copy(saved_cpumask, wq_unbound_cpumask);
@@ -5147,10 +5153,11 @@ int workqueue_set_unbound_cpumask(cpumask_var_t cpumask)
 		if (ret < 0)
 			cpumask_copy(wq_unbound_cpumask, saved_cpumask);
 
+		free_cpumask_var(saved_cpumask);
+out_unlock:
 		apply_wqattrs_unlock();
 	}
 
-	free_cpumask_var(saved_cpumask);
 	return ret;
 }
 
-- 
2.33.0

[PATCH AUTOSEL 4.19 33/47] tracing/cfi: Fix cmp_entries_* functions signature mismatch

[Sasha Levin]

From: Kalesh Singh <kaleshsingh@google.com>

[ Upstream commit 7ce1bb83a14019f8c396d57ec704d19478747716 ]

If CONFIG_CFI_CLANG=y, attempting to read an event histogram will cause
the kernel to panic due to failed CFI check.

    1. echo 'hist:keys=common_pid' >> events/sched/sched_switch/trigger
    2. cat events/sched/sched_switch/hist
    3. kernel panics on attempting to read hist

This happens because the sort() function expects a generic
int (*)(const void *, const void *) pointer for the compare function.
To prevent this CFI failure, change tracing map cmp_entries_* function
signatures to match this.

Also, fix the build error reported by the kernel test robot [1].

[1] https://lore.kernel.org/r/202110141140.zzi4dRh4-lkp@intel.com/

Link: https://lkml.kernel.org/r/20211014045217.3265162-1-kaleshsingh@google.com

Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/trace/tracing_map.c | 40 ++++++++++++++++++++++----------------
 1 file changed, 23 insertions(+), 17 deletions(-)

diff --git a/kernel/trace/tracing_map.c b/kernel/trace/tracing_map.c
index 9e31bfc818ff8..10657b8dc2c2d 100644
--- a/kernel/trace/tracing_map.c
+++ b/kernel/trace/tracing_map.c
@@ -834,29 +834,35 @@ int tracing_map_init(struct tracing_map *map)
 	return err;
 }
 
-static int cmp_entries_dup(const struct tracing_map_sort_entry **a,
-			   const struct tracing_map_sort_entry **b)
+static int cmp_entries_dup(const void *A, const void *B)
 {
+	const struct tracing_map_sort_entry *a, *b;
 	int ret = 0;
 
-	if (memcmp((*a)->key, (*b)->key, (*a)->elt->map->key_size))
+	a = *(const struct tracing_map_sort_entry **)A;
+	b = *(const struct tracing_map_sort_entry **)B;
+
+	if (memcmp(a->key, b->key, a->elt->map->key_size))
 		ret = 1;
 
 	return ret;
 }
 
-static int cmp_entries_sum(const struct tracing_map_sort_entry **a,
-			   const struct tracing_map_sort_entry **b)
+static int cmp_entries_sum(const void *A, const void *B)
 {
 	const struct tracing_map_elt *elt_a, *elt_b;
+	const struct tracing_map_sort_entry *a, *b;
 	struct tracing_map_sort_key *sort_key;
 	struct tracing_map_field *field;
 	tracing_map_cmp_fn_t cmp_fn;
 	void *val_a, *val_b;
 	int ret = 0;
 
-	elt_a = (*a)->elt;
-	elt_b = (*b)->elt;
+	a = *(const struct tracing_map_sort_entry **)A;
+	b = *(const struct tracing_map_sort_entry **)B;
+
+	elt_a = a->elt;
+	elt_b = b->elt;
 
 	sort_key = &elt_a->map->sort_key;
 
@@ -873,18 +879,21 @@ static int cmp_entries_sum(const struct tracing_map_sort_entry **a,
 	return ret;
 }
 
-static int cmp_entries_key(const struct tracing_map_sort_entry **a,
-			   const struct tracing_map_sort_entry **b)
+static int cmp_entries_key(const void *A, const void *B)
 {
 	const struct tracing_map_elt *elt_a, *elt_b;
+	const struct tracing_map_sort_entry *a, *b;
 	struct tracing_map_sort_key *sort_key;
 	struct tracing_map_field *field;
 	tracing_map_cmp_fn_t cmp_fn;
 	void *val_a, *val_b;
 	int ret = 0;
 
-	elt_a = (*a)->elt;
-	elt_b = (*b)->elt;
+	a = *(const struct tracing_map_sort_entry **)A;
+	b = *(const struct tracing_map_sort_entry **)B;
+
+	elt_a = a->elt;
+	elt_b = b->elt;
 
 	sort_key = &elt_a->map->sort_key;
 
@@ -989,10 +998,8 @@ static void sort_secondary(struct tracing_map *map,
 			   struct tracing_map_sort_key *primary_key,
 			   struct tracing_map_sort_key *secondary_key)
 {
-	int (*primary_fn)(const struct tracing_map_sort_entry **,
-			  const struct tracing_map_sort_entry **);
-	int (*secondary_fn)(const struct tracing_map_sort_entry **,
-			    const struct tracing_map_sort_entry **);
+	int (*primary_fn)(const void *, const void *);
+	int (*secondary_fn)(const void *, const void *);
 	unsigned i, start = 0, n_sub = 1;
 
 	if (is_key(map, primary_key->field_idx))
@@ -1061,8 +1068,7 @@ int tracing_map_sort_entries(struct tracing_map *map,
 			     unsigned int n_sort_keys,
 			     struct tracing_map_sort_entry ***sort_entries)
 {
-	int (*cmp_entries_fn)(const struct tracing_map_sort_entry **,
-			      const struct tracing_map_sort_entry **);
+	int (*cmp_entries_fn)(const void *, const void *);
 	struct tracing_map_sort_entry *sort_entry, **entries;
 	int i, n_entries, ret;
 
-- 
2.33.0

[PATCH AUTOSEL 4.19 34/47] mwl8k: Fix use-after-free in mwl8k_fw_state_machine()

[Sasha Levin]

From: Zheyu Ma <zheyuma97@gmail.com>

[ Upstream commit 257051a235c17e33782b6e24a4b17f2d7915aaec ]

When the driver fails to request the firmware, it calls its error
handler. In the error handler, the driver detaches device from driver
first before releasing the firmware, which can cause a use-after-free bug.

Fix this by releasing firmware first.

The following log reveals it:

[    9.007301 ] BUG: KASAN: use-after-free in mwl8k_fw_state_machine+0x320/0xba0
[    9.010143 ] Workqueue: events request_firmware_work_func
[    9.010830 ] Call Trace:
[    9.010830 ]  dump_stack_lvl+0xa8/0xd1
[    9.010830 ]  print_address_description+0x87/0x3b0
[    9.010830 ]  kasan_report+0x172/0x1c0
[    9.010830 ]  ? mutex_unlock+0xd/0x10
[    9.010830 ]  ? mwl8k_fw_state_machine+0x320/0xba0
[    9.010830 ]  ? mwl8k_fw_state_machine+0x320/0xba0
[    9.010830 ]  __asan_report_load8_noabort+0x14/0x20
[    9.010830 ]  mwl8k_fw_state_machine+0x320/0xba0
[    9.010830 ]  ? mwl8k_load_firmware+0x5f0/0x5f0
[    9.010830 ]  request_firmware_work_func+0x172/0x250
[    9.010830 ]  ? read_lock_is_recursive+0x20/0x20
[    9.010830 ]  ? process_one_work+0x7a1/0x1100
[    9.010830 ]  ? request_firmware_nowait+0x460/0x460
[    9.010830 ]  ? __this_cpu_preempt_check+0x13/0x20
[    9.010830 ]  process_one_work+0x9bb/0x1100

Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1634356979-6211-1-git-send-email-zheyuma97@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/marvell/mwl8k.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/marvell/mwl8k.c b/drivers/net/wireless/marvell/mwl8k.c
index 6769b0c5a5cde..ee842797570b7 100644
--- a/drivers/net/wireless/marvell/mwl8k.c
+++ b/drivers/net/wireless/marvell/mwl8k.c
@@ -5793,8 +5793,8 @@ static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
 fail:
 	priv->fw_state = FW_STATE_ERROR;
 	complete(&priv->firmware_loading_complete);
-	device_release_driver(&priv->pdev->dev);
 	mwl8k_release_firmware(priv);
+	device_release_driver(&priv->pdev->dev);
 }
 
 #define MAX_RESTART_ATTEMPTS 1
-- 
2.33.0

[PATCH AUTOSEL 4.19 35/47] PM: hibernate: Get block device exclusively in swsusp_check()

[Sasha Levin]

From: Ye Bin <yebin10@huawei.com>

[ Upstream commit 39fbef4b0f77f9c89c8f014749ca533643a37c9f ]

The following kernel crash can be triggered:

[   89.266592] ------------[ cut here ]------------
[   89.267427] kernel BUG at fs/buffer.c:3020!
[   89.268264] invalid opcode: 0000 [#1] SMP KASAN PTI
[   89.269116] CPU: 7 PID: 1750 Comm: kmmpd-loop0 Not tainted 5.10.0-862.14.0.6.x86_64-08610-gc932cda3cef4-dirty #20
[   89.273169] RIP: 0010:submit_bh_wbc.isra.0+0x538/0x6d0
[   89.277157] RSP: 0018:ffff888105ddfd08 EFLAGS: 00010246
[   89.278093] RAX: 0000000000000005 RBX: ffff888124231498 RCX: ffffffffb2772612
[   89.279332] RDX: 1ffff11024846293 RSI: 0000000000000008 RDI: ffff888124231498
[   89.280591] RBP: ffff8881248cc000 R08: 0000000000000001 R09: ffffed1024846294
[   89.281851] R10: ffff88812423149f R11: ffffed1024846293 R12: 0000000000003800
[   89.283095] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881161f7000
[   89.284342] FS:  0000000000000000(0000) GS:ffff88839b5c0000(0000) knlGS:0000000000000000
[   89.285711] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   89.286701] CR2: 00007f166ebc01a0 CR3: 0000000435c0e000 CR4: 00000000000006e0
[   89.287919] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   89.289138] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   89.290368] Call Trace:
[   89.290842]  write_mmp_block+0x2ca/0x510
[   89.292218]  kmmpd+0x433/0x9a0
[   89.294902]  kthread+0x2dd/0x3e0
[   89.296268]  ret_from_fork+0x22/0x30
[   89.296906] Modules linked in:

by running the following commands:

 1. mkfs.ext4 -O mmp  /dev/sda -b 1024
 2. mount /dev/sda /home/test
 3. echo "/dev/sda" > /sys/power/resume

That happens because swsusp_check() calls set_blocksize() on the
target partition which confuses the file system:

       Thread1                       Thread2
mount /dev/sda /home/test
get s_mmp_bh  --> has mapped flag
start kmmpd thread
				echo "/dev/sda" > /sys/power/resume
				  resume_store
				    software_resume
				      swsusp_check
				        set_blocksize
					  truncate_inode_pages_range
					    truncate_cleanup_page
					      block_invalidatepage
					        discard_buffer --> clean mapped flag
write_mmp_block
  submit_bh
    submit_bh_wbc
      BUG_ON(!buffer_mapped(bh))

To address this issue, modify swsusp_check() to open the target block
device with exclusive access.

Signed-off-by: Ye Bin <yebin10@huawei.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/power/swap.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index e9494c29f1ca4..b5b97df142d26 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -1512,9 +1512,10 @@ int swsusp_read(unsigned int *flags_p)
 int swsusp_check(void)
 {
 	int error;
+	void *holder;
 
 	hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device,
-					    FMODE_READ, NULL);
+					    FMODE_READ | FMODE_EXCL, &holder);
 	if (!IS_ERR(hib_resume_bdev)) {
 		set_blocksize(hib_resume_bdev, PAGE_SIZE);
 		clear_page(swsusp_header);
@@ -1536,7 +1537,7 @@ int swsusp_check(void)
 
 put:
 		if (error)
-			blkdev_put(hib_resume_bdev, FMODE_READ);
+			blkdev_put(hib_resume_bdev, FMODE_READ | FMODE_EXCL);
 		else
 			pr_debug("Image signature found, resuming\n");
 	} else {
-- 
2.33.0

[PATCH AUTOSEL 4.19 36/47] iwlwifi: mvm: disable RX-diversity in powersave

[Sasha Levin]

From: Johannes Berg <johannes.berg@intel.com>

[ Upstream commit e5322b9ab5f63536c41301150b7ce64605ce52cc ]

Just like we have default SMPS mode as dynamic in powersave,
we should not enable RX-diversity in powersave, to reduce
power consumption when connected to a non-MIMO AP.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211017113927.fc896bc5cdaa.I1d11da71b8a5cbe921a37058d5f578f1b14a2023@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/intel/iwlwifi/mvm/utils.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
index 00712205c05f2..bc3f67e0bf334 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/utils.c
@@ -1018,6 +1018,9 @@ bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm)
 
 	lockdep_assert_held(&mvm->mutex);
 
+	if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
+		return false;
+
 	if (num_of_ant(iwl_mvm_get_valid_rx_ant(mvm)) == 1)
 		return false;
 
-- 
2.33.0

[PATCH AUTOSEL 4.19 37/47] smackfs: use __GFP_NOFAIL for smk_cipso_doi()

[Sasha Levin]

From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>

[ Upstream commit f91488ee15bd3cac467e2d6a361fc2d34d1052ae ]

syzbot is reporting kernel panic at smk_cipso_doi() due to memory
allocation fault injection [1]. The reason for need to use panic() was
not explained. But since no fix was proposed for 18 months, for now
let's use __GFP_NOFAIL for utilizing syzbot resource on other bugs.

Link: https://syzkaller.appspot.com/bug?extid=89731ccb6fec15ce1c22 [1]
Reported-by: syzbot <syzbot+89731ccb6fec15ce1c22@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 security/smack/smackfs.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index 25705a72d31bc..9fdf404a318f9 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -721,9 +721,7 @@ static void smk_cipso_doi(void)
 		printk(KERN_WARNING "%s:%d remove rc = %d\n",
 		       __func__, __LINE__, rc);
 
-	doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL);
-	if (doip == NULL)
-		panic("smack:  Failed to initialize cipso DOI.\n");
+	doip = kmalloc(sizeof(struct cipso_v4_doi), GFP_KERNEL | __GFP_NOFAIL);
 	doip->map.std = NULL;
 	doip->doi = smk_cipso_doi_value;
 	doip->type = CIPSO_V4_MAP_PASS;
-- 
2.33.0

[PATCH AUTOSEL 4.19 38/47] ARM: clang: Do not rely on lr register for stacktrace

[Sasha Levin]

From: Masami Hiramatsu <mhiramat@kernel.org>

[ Upstream commit b3ea5d56f212ad81328c82454829a736197ebccc ]

Currently the stacktrace on clang compiled arm kernel uses the 'lr'
register to find the first frame address from pt_regs. However, that
is wrong after calling another function, because the 'lr' register
is used by 'bl' instruction and never be recovered.

As same as gcc arm kernel, directly use the frame pointer (r11) of
the pt_regs to find the first frame address.

Note that this fixes kretprobe stacktrace issue only with
CONFIG_UNWINDER_FRAME_POINTER=y. For the CONFIG_UNWINDER_ARM,
we need another fix.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arm/kernel/stacktrace.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm/kernel/stacktrace.c b/arch/arm/kernel/stacktrace.c
index d23ab9ec130a3..a452b859f485f 100644
--- a/arch/arm/kernel/stacktrace.c
+++ b/arch/arm/kernel/stacktrace.c
@@ -53,8 +53,7 @@ int notrace unwind_frame(struct stackframe *frame)
 
 	frame->sp = frame->fp;
 	frame->fp = *(unsigned long *)(fp);
-	frame->pc = frame->lr;
-	frame->lr = *(unsigned long *)(fp + 4);
+	frame->pc = *(unsigned long *)(fp + 4);
 #else
 	/* check current frame pointer is within bounds */
 	if (fp < low + 12 || fp > high - 4)
-- 
2.33.0

[PATCH AUTOSEL 4.19 39/47] gre/sit: Don't generate link-local addr if addr_gen_mode is IN6_ADDR_GEN_MODE_NONE

[Sasha Levin]

From: Stephen Suryaputra <ssuryaextr@gmail.com>

[ Upstream commit 61e18ce7348bfefb5688a8bcd4b4d6b37c0f9b2a ]

When addr_gen_mode is set to IN6_ADDR_GEN_MODE_NONE, the link-local addr
should not be generated. But it isn't the case for GRE (as well as GRE6)
and SIT tunnels. Make it so that tunnels consider the addr_gen_mode,
especially for IN6_ADDR_GEN_MODE_NONE.

Do this in add_v4_addrs() to cover both GRE and SIT only if the addr
scope is link.

Signed-off-by: Stephen Suryaputra <ssuryaextr@gmail.com>
Acked-by: Antonio Quartulli <a@unstable.cc>
Link: https://lore.kernel.org/r/20211020200618.467342-1-ssuryaextr@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/ipv6/addrconf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 76c097552ea74..9d8b791f63efc 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3054,6 +3054,9 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
 	memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
 
 	if (idev->dev->flags&IFF_POINTOPOINT) {
+		if (idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_NONE)
+			return;
+
 		addr.s6_addr32[0] = htonl(0xfe800000);
 		scope = IFA_LINK;
 		plen = 64;
-- 
2.33.0

[PATCH AUTOSEL 4.19 40/47] ARM: 9136/1: ARMv7-M uses BE-8, not BE-32

[Sasha Levin]

From: Arnd Bergmann <arnd@arndb.de>

[ Upstream commit 345dac33f58894a56d17b92a41be10e16585ceff ]

When configuring the kernel for big-endian, we set either BE-8 or BE-32
based on the CPU architecture level. Until linux-4.4, we did not have
any ARMv7-M platform allowing big-endian builds, but now i.MX/Vybrid
is in that category, adn we get a build error because of this:

arch/arm/kernel/module-plts.c: In function 'get_module_plt':
arch/arm/kernel/module-plts.c:60:46: error: implicit declaration of function '__opcode_to_mem_thumb32' [-Werror=implicit-function-declaration]

This comes down to picking the wrong default, ARMv7-M uses BE8
like ARMv7-A does. Changing the default gets the kernel to compile
and presumably works.

https://lore.kernel.org/all/1455804123-2526139-2-git-send-email-arnd@arndb.de/

Tested-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arm/mm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index b169e580bf829..9738c1f9737c9 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -751,7 +751,7 @@ config CPU_BIG_ENDIAN
 config CPU_ENDIAN_BE8
 	bool
 	depends on CPU_BIG_ENDIAN
-	default CPU_V6 || CPU_V6K || CPU_V7
+	default CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M
 	help
 	  Support for the BE-8 (big-endian) mode on ARMv6 and ARMv7 processors.
 
-- 
2.33.0

[PATCH AUTOSEL 4.19 41/47] arm64/sve: Add stub for sve_max_virtualisable_vl()

[Sasha Levin]

From: Mark Brown <broonie@kernel.org>

[ Upstream commit 49ed920408f85fb143020cf7d95612b6b12a84a2 ]

Fixes build problems for configurations with KVM enabled but SVE disabled.

Reported-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20211022141635.2360415-2-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arm64/include/asm/fpsimd.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/include/asm/fpsimd.h b/arch/arm64/include/asm/fpsimd.h
index dd1ad3950ef5d..5bd799ea683b4 100644
--- a/arch/arm64/include/asm/fpsimd.h
+++ b/arch/arm64/include/asm/fpsimd.h
@@ -130,6 +130,11 @@ static inline void fpsimd_release_task(struct task_struct *task) { }
 static inline void sve_sync_to_fpsimd(struct task_struct *task) { }
 static inline void sve_sync_from_fpsimd_zeropad(struct task_struct *task) { }
 
+static inline int sve_max_virtualisable_vl(void)
+{
+	return 0;
+}
+
 static inline int sve_set_current_vl(unsigned long arg)
 {
 	return -EINVAL;
-- 
2.33.0

Re: [PATCH AUTOSEL 4.19 41/47] arm64/sve: Add stub for sve_max_virtualisable_vl()

[Catalin Marinas]

On Mon, Nov 08, 2021 at 12:50:25PM -0500, Sasha Levin wrote:
> From: Mark Brown <broonie@kernel.org>
> 
> [ Upstream commit 49ed920408f85fb143020cf7d95612b6b12a84a2 ]
> 
> Fixes build problems for configurations with KVM enabled but SVE disabled.
> 
> Reported-by: Catalin Marinas <catalin.marinas@arm.com>
> Signed-off-by: Mark Brown <broonie@kernel.org>
> Link: https://lore.kernel.org/r/20211022141635.2360415-2-broonie@kernel.org
> Signed-off-by: Will Deacon <will@kernel.org>
> Signed-off-by: Sasha Levin <sashal@kernel.org>
> ---
>  arch/arm64/include/asm/fpsimd.h | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm64/include/asm/fpsimd.h b/arch/arm64/include/asm/fpsimd.h
> index dd1ad3950ef5d..5bd799ea683b4 100644
> --- a/arch/arm64/include/asm/fpsimd.h
> +++ b/arch/arm64/include/asm/fpsimd.h
> @@ -130,6 +130,11 @@ static inline void fpsimd_release_task(struct task_struct *task) { }
>  static inline void sve_sync_to_fpsimd(struct task_struct *task) { }
>  static inline void sve_sync_from_fpsimd_zeropad(struct task_struct *task) { }
>  
> +static inline int sve_max_virtualisable_vl(void)
> +{
> +	return 0;
> +}

IIRC this fix was only needed for 5.16-rc1.

-- 
Catalin

Re: [PATCH AUTOSEL 4.19 41/47] arm64/sve: Add stub for sve_max_virtualisable_vl()

[Sasha Levin]

On Tue, Nov 09, 2021 at 01:20:44PM +0000, Catalin Marinas wrote:
>On Mon, Nov 08, 2021 at 12:50:25PM -0500, Sasha Levin wrote:
>> From: Mark Brown <broonie@kernel.org>
>>
>> [ Upstream commit 49ed920408f85fb143020cf7d95612b6b12a84a2 ]
>>
>> Fixes build problems for configurations with KVM enabled but SVE disabled.
>>
>> Reported-by: Catalin Marinas <catalin.marinas@arm.com>
>> Signed-off-by: Mark Brown <broonie@kernel.org>
>> Link: https://lore.kernel.org/r/20211022141635.2360415-2-broonie@kernel.org
>> Signed-off-by: Will Deacon <will@kernel.org>
>> Signed-off-by: Sasha Levin <sashal@kernel.org>
>> ---
>>  arch/arm64/include/asm/fpsimd.h | 5 +++++
>>  1 file changed, 5 insertions(+)
>>
>> diff --git a/arch/arm64/include/asm/fpsimd.h b/arch/arm64/include/asm/fpsimd.h
>> index dd1ad3950ef5d..5bd799ea683b4 100644
>> --- a/arch/arm64/include/asm/fpsimd.h
>> +++ b/arch/arm64/include/asm/fpsimd.h
>> @@ -130,6 +130,11 @@ static inline void fpsimd_release_task(struct task_struct *task) { }
>>  static inline void sve_sync_to_fpsimd(struct task_struct *task) { }
>>  static inline void sve_sync_from_fpsimd_zeropad(struct task_struct *task) { }
>>
>> +static inline int sve_max_virtualisable_vl(void)
>> +{
>> +	return 0;
>> +}
>
>IIRC this fix was only needed for 5.16-rc1.

I'll drop it, thanks!

-- 
Thanks,
Sasha

[PATCH AUTOSEL 4.19 42/47] spi: bcm-qspi: Fix missing clk_disable_unprepare() on error in bcm_qspi_probe()

[Sasha Levin]

From: Yang Yingliang <yangyingliang@huawei.com>

[ Upstream commit ca9b8f56ec089d3a436050afefd17b7237301f47 ]

Fix the missing clk_disable_unprepare() before return
from bcm_qspi_probe() in the error handling case.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20211018073413.2029081-1-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/spi/spi-bcm-qspi.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-bcm-qspi.c b/drivers/spi/spi-bcm-qspi.c
index 4ee92f7ca20bd..b2fd7a3691964 100644
--- a/drivers/spi/spi-bcm-qspi.c
+++ b/drivers/spi/spi-bcm-qspi.c
@@ -1305,7 +1305,7 @@ int bcm_qspi_probe(struct platform_device *pdev,
 					       &qspi->dev_ids[val]);
 			if (ret < 0) {
 				dev_err(&pdev->dev, "IRQ %s not found\n", name);
-				goto qspi_probe_err;
+				goto qspi_unprepare_err;
 			}
 
 			qspi->dev_ids[val].dev = qspi;
@@ -1320,7 +1320,7 @@ int bcm_qspi_probe(struct platform_device *pdev,
 	if (!num_ints) {
 		dev_err(&pdev->dev, "no IRQs registered, cannot init driver\n");
 		ret = -EINVAL;
-		goto qspi_probe_err;
+		goto qspi_unprepare_err;
 	}
 
 	/*
@@ -1371,6 +1371,7 @@ int bcm_qspi_probe(struct platform_device *pdev,
 
 qspi_reg_err:
 	bcm_qspi_hw_uninit(qspi);
+qspi_unprepare_err:
 	clk_disable_unprepare(qspi->clk);
 qspi_probe_err:
 	kfree(qspi->dev_ids);
-- 
2.33.0

[PATCH AUTOSEL 4.19 43/47] x86/hyperv: Protect set_hv_tscchange_cb() against getting preempted

[Sasha Levin]

From: Vitaly Kuznetsov <vkuznets@redhat.com>

[ Upstream commit 285f68afa8b20f752b0b7194d54980b5e0e27b75 ]

The following issue is observed with CONFIG_DEBUG_PREEMPT when KVM loads:

 KVM: vmx: using Hyper-V Enlightened VMCS
 BUG: using smp_processor_id() in preemptible [00000000] code: systemd-udevd/488
 caller is set_hv_tscchange_cb+0x16/0x80
 CPU: 1 PID: 488 Comm: systemd-udevd Not tainted 5.15.0-rc5+ #396
 Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.0 12/17/2019
 Call Trace:
  dump_stack_lvl+0x6a/0x9a
  check_preemption_disabled+0xde/0xe0
  ? kvm_gen_update_masterclock+0xd0/0xd0 [kvm]
  set_hv_tscchange_cb+0x16/0x80
  kvm_arch_init+0x23f/0x290 [kvm]
  kvm_init+0x30/0x310 [kvm]
  vmx_init+0xaf/0x134 [kvm_intel]
  ...

set_hv_tscchange_cb() can get preempted in between acquiring
smp_processor_id() and writing to HV_X64_MSR_REENLIGHTENMENT_CONTROL. This
is not an issue by itself: HV_X64_MSR_REENLIGHTENMENT_CONTROL is a
partition-wide MSR and it doesn't matter which particular CPU will be
used to receive reenlightenment notifications. The only real problem can
(in theory) be observed if the CPU whose id was acquired with
smp_processor_id() goes offline before we manage to write to the MSR,
the logic in hv_cpu_die() won't be able to reassign it correctly.

Reported-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Link: https://lore.kernel.org/r/20211012155005.1613352-1-vkuznets@redhat.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/x86/hyperv/hv_init.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index 1663ad84778ba..bd4b6951b1483 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -192,7 +192,6 @@ void set_hv_tscchange_cb(void (*cb)(void))
 	struct hv_reenlightenment_control re_ctrl = {
 		.vector = HYPERV_REENLIGHTENMENT_VECTOR,
 		.enabled = 1,
-		.target_vp = hv_vp_index[smp_processor_id()]
 	};
 	struct hv_tsc_emulation_control emu_ctrl = {.enabled = 1};
 
@@ -206,8 +205,12 @@ void set_hv_tscchange_cb(void (*cb)(void))
 	/* Make sure callback is registered before we write to MSRs */
 	wmb();
 
+	re_ctrl.target_vp = hv_vp_index[get_cpu()];
+
 	wrmsrl(HV_X64_MSR_REENLIGHTENMENT_CONTROL, *((u64 *)&re_ctrl));
 	wrmsrl(HV_X64_MSR_TSC_EMULATION_CONTROL, *((u64 *)&emu_ctrl));
+
+	put_cpu();
 }
 EXPORT_SYMBOL_GPL(set_hv_tscchange_cb);
 
-- 
2.33.0

[PATCH AUTOSEL 4.19 44/47] parisc: fix warning in flush_tlb_all

[Sasha Levin]

From: Sven Schnelle <svens@stackframe.org>

[ Upstream commit 1030d681319b43869e0d5b568b9d0226652d1a6f ]

I've got the following splat after enabling preemption:

[    3.724721] BUG: using __this_cpu_add() in preemptible [00000000] code: swapper/0/1
[    3.734630] caller is __this_cpu_preempt_check+0x38/0x50
[    3.740635] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc4-64bit+ #324
[    3.744605] Hardware name: 9000/785/C8000
[    3.744605] Backtrace:
[    3.744605]  [<00000000401d9d58>] show_stack+0x74/0xb0
[    3.744605]  [<0000000040c27bd4>] dump_stack_lvl+0x10c/0x188
[    3.744605]  [<0000000040c27c84>] dump_stack+0x34/0x48
[    3.744605]  [<0000000040c33438>] check_preemption_disabled+0x178/0x1b0
[    3.744605]  [<0000000040c334f8>] __this_cpu_preempt_check+0x38/0x50
[    3.744605]  [<00000000401d632c>] flush_tlb_all+0x58/0x2e0
[    3.744605]  [<00000000401075c0>] 0x401075c0
[    3.744605]  [<000000004010b8fc>] 0x4010b8fc
[    3.744605]  [<00000000401080fc>] 0x401080fc
[    3.744605]  [<00000000401d5224>] do_one_initcall+0x128/0x378
[    3.744605]  [<0000000040102de8>] 0x40102de8
[    3.744605]  [<0000000040c33864>] kernel_init+0x60/0x3a8
[    3.744605]  [<00000000401d1020>] ret_from_kernel_thread+0x20/0x28
[    3.744605]

Fix this by moving the __inc_irq_stat() into the locked section.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/parisc/mm/init.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 10a52664e29f0..038fcb6c76dc1 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -895,9 +895,9 @@ void flush_tlb_all(void)
 {
 	int do_recycle;
 
-	__inc_irq_stat(irq_tlb_count);
 	do_recycle = 0;
 	spin_lock(&sid_lock);
+	__inc_irq_stat(irq_tlb_count);
 	if (dirty_space_ids > RECYCLE_THRESHOLD) {
 	    BUG_ON(recycle_inuse);  /* FIXME: Use a semaphore/wait queue here */
 	    get_dirty_sids(&recycle_ndirty,recycle_dirty_array);
@@ -916,8 +916,8 @@ void flush_tlb_all(void)
 #else
 void flush_tlb_all(void)
 {
-	__inc_irq_stat(irq_tlb_count);
 	spin_lock(&sid_lock);
+	__inc_irq_stat(irq_tlb_count);
 	flush_tlb_all_local(NULL);
 	recycle_sids();
 	spin_unlock(&sid_lock);
-- 
2.33.0

[PATCH AUTOSEL 4.19 45/47] task_stack: Fix end_of_stack() for architectures with upwards-growing stack

[Sasha Levin]

From: Helge Deller <deller@gmx.de>

[ Upstream commit 9cc2fa4f4a92ccc6760d764e7341be46ee8aaaa1 ]

The function end_of_stack() returns a pointer to the last entry of a
stack. For architectures like parisc where the stack grows upwards
return the pointer to the highest address in the stack.

Without this change I faced a crash on parisc, because the stackleak
functionality wrote STACKLEAK_POISON to the lowest address and thus
overwrote the first 4 bytes of the task_struct which included the
TIF_FLAGS.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 include/linux/sched/task_stack.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/sched/task_stack.h b/include/linux/sched/task_stack.h
index 6a841929073f9..4f099d3fed3a9 100644
--- a/include/linux/sched/task_stack.h
+++ b/include/linux/sched/task_stack.h
@@ -25,7 +25,11 @@ static inline void *task_stack_page(const struct task_struct *task)
 
 static inline unsigned long *end_of_stack(const struct task_struct *task)
 {
+#ifdef CONFIG_STACK_GROWSUP
+	return (unsigned long *)((unsigned long)task->stack + THREAD_SIZE) - 1;
+#else
 	return task->stack;
+#endif
 }
 
 #elif !defined(__HAVE_THREAD_FUNCTIONS)
-- 
2.33.0

[PATCH AUTOSEL 4.19 46/47] parisc/unwind: fix unwinder when CONFIG_64BIT is enabled

[Sasha Levin]

From: Sven Schnelle <svens@stackframe.org>

[ Upstream commit 8e0ba125c2bf1030af3267058019ba86da96863f ]

With 64 bit kernels unwind_special() is not working because
it compares the pc to the address of the function descriptor.
Add a helper function that compares pc with the dereferenced
address. This fixes all of the backtraces on my c8000. Without
this changes, a lot of backtraces are missing in kdb or the
show-all-tasks command from /proc/sysrq-trigger.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/parisc/kernel/unwind.c | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c
index 2d14f17838d23..fa52c939e8a3b 100644
--- a/arch/parisc/kernel/unwind.c
+++ b/arch/parisc/kernel/unwind.c
@@ -21,6 +21,8 @@
 #include <asm/ptrace.h>
 
 #include <asm/unwind.h>
+#include <asm/switch_to.h>
+#include <asm/sections.h>
 
 /* #define DEBUG 1 */
 #ifdef DEBUG
@@ -203,6 +205,11 @@ int __init unwind_init(void)
 	return 0;
 }
 
+static bool pc_is_kernel_fn(unsigned long pc, void *fn)
+{
+	return (unsigned long)dereference_kernel_function_descriptor(fn) == pc;
+}
+
 static int unwind_special(struct unwind_frame_info *info, unsigned long pc, int frame_size)
 {
 	/*
@@ -221,7 +228,7 @@ static int unwind_special(struct unwind_frame_info *info, unsigned long pc, int
 	extern void * const _call_on_stack;
 #endif /* CONFIG_IRQSTACKS */
 
-	if (pc == (unsigned long) &handle_interruption) {
+	if (pc_is_kernel_fn(pc, handle_interruption)) {
 		struct pt_regs *regs = (struct pt_regs *)(info->sp - frame_size - PT_SZ_ALGN);
 		dbg("Unwinding through handle_interruption()\n");
 		info->prev_sp = regs->gr[30];
@@ -229,13 +236,13 @@ static int unwind_special(struct unwind_frame_info *info, unsigned long pc, int
 		return 1;
 	}
 
-	if (pc == (unsigned long) &ret_from_kernel_thread ||
-	    pc == (unsigned long) &syscall_exit) {
+	if (pc_is_kernel_fn(pc, ret_from_kernel_thread) ||
+	    pc_is_kernel_fn(pc, syscall_exit)) {
 		info->prev_sp = info->prev_ip = 0;
 		return 1;
 	}
 
-	if (pc == (unsigned long) &intr_return) {
+	if (pc_is_kernel_fn(pc, intr_return)) {
 		struct pt_regs *regs;
 
 		dbg("Found intr_return()\n");
@@ -246,20 +253,20 @@ static int unwind_special(struct unwind_frame_info *info, unsigned long pc, int
 		return 1;
 	}
 
-	if (pc == (unsigned long) &_switch_to_ret) {
+	if (pc_is_kernel_fn(pc, _switch_to) ||
+	    pc_is_kernel_fn(pc, _switch_to_ret)) {
 		info->prev_sp = info->sp - CALLEE_SAVE_FRAME_SIZE;
 		info->prev_ip = *(unsigned long *)(info->prev_sp - RP_OFFSET);
 		return 1;
 	}
 
 #ifdef CONFIG_IRQSTACKS
-	if (pc == (unsigned long) &_call_on_stack) {
+	if (pc_is_kernel_fn(pc, _call_on_stack)) {
 		info->prev_sp = *(unsigned long *)(info->sp - FRAME_SIZE - REG_SZ);
 		info->prev_ip = *(unsigned long *)(info->sp - FRAME_SIZE - RP_OFFSET);
 		return 1;
 	}
 #endif
-
 	return 0;
 }
 
-- 
2.33.0

[PATCH AUTOSEL 4.19 47/47] parisc/kgdb: add kgdb_roundup() to make kgdb work with idle polling

[Sasha Levin]

From: Sven Schnelle <svens@stackframe.org>

[ Upstream commit 66e29fcda1824f0427966fbee2bd2c85bf362c82 ]

With idle polling, IPIs are not sent when a CPU idle, but queued
and run later from do_idle(). The default kgdb_call_nmi_hook()
implementation gets the pointer to struct pt_regs from get_irq_reqs(),
which doesn't work in that case because it was not called from the
IPI interrupt handler. Fix it by defining our own kgdb_roundup()
function which sents an IPI_ENTER_KGDB. When that IPI is received
on the target CPU kgdb_nmicallback() is called.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/parisc/kernel/smp.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c
index 5e26dbede5fc2..ae4fc8769c38b 100644
--- a/arch/parisc/kernel/smp.c
+++ b/arch/parisc/kernel/smp.c
@@ -32,6 +32,7 @@
 #include <linux/bitops.h>
 #include <linux/ftrace.h>
 #include <linux/cpu.h>
+#include <linux/kgdb.h>
 
 #include <linux/atomic.h>
 #include <asm/current.h>
@@ -74,7 +75,10 @@ enum ipi_message_type {
 	IPI_CALL_FUNC,
 	IPI_CPU_START,
 	IPI_CPU_STOP,
-	IPI_CPU_TEST
+	IPI_CPU_TEST,
+#ifdef CONFIG_KGDB
+	IPI_ENTER_KGDB,
+#endif
 };
 
 
@@ -170,7 +174,12 @@ ipi_interrupt(int irq, void *dev_id)
 			case IPI_CPU_TEST:
 				smp_debug(100, KERN_DEBUG "CPU%d is alive!\n", this_cpu);
 				break;
-
+#ifdef CONFIG_KGDB
+			case IPI_ENTER_KGDB:
+				smp_debug(100, KERN_DEBUG "CPU%d ENTER_KGDB\n", this_cpu);
+				kgdb_nmicallback(raw_smp_processor_id(), get_irq_regs());
+				break;
+#endif
 			default:
 				printk(KERN_CRIT "Unknown IPI num on CPU%d: %lu\n",
 					this_cpu, which);
@@ -226,6 +235,12 @@ send_IPI_allbutself(enum ipi_message_type op)
 	}
 }
 
+#ifdef CONFIG_KGDB
+void kgdb_roundup_cpus(void)
+{
+	send_IPI_allbutself(IPI_ENTER_KGDB);
+}
+#endif
 
 inline void 
 smp_send_stop(void)	{ send_IPI_allbutself(IPI_CPU_STOP); }
-- 
2.33.0