From: Qiujun Huang <hqjagain@gmail.com>
To: kvalo@codeaurora.org, ath9k-devel@qca.qualcomm.com
Cc: davem@davemloft.net, linux-wireless@vger.kernel.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
anenbupt@gmail.com, syzkaller-bugs@googlegroups.com,
Qiujun Huang <hqjagain@gmail.com>
Subject: [PATCH 5/5] ath9k: Fix general protection fault in ath9k_hif_usb_rx_cb
Date: Sat, 4 Apr 2020 12:18:38 +0800 [thread overview]
Message-ID: <20200404041838.10426-6-hqjagain@gmail.com> (raw)
In-Reply-To: <20200404041838.10426-1-hqjagain@gmail.com>
In ath9k_hif_usb_rx_cb interface number is assumed to be 0.
usb_ifnum_to_if(urb->dev, 0)
But it isn't always true.
The case reported by syzbot:
https://lore.kernel.org/linux-usb/000000000000666c9c05a1c05d12@google.com
usb 2-1: new high-speed USB device number 2 using dummy_hcd
usb 2-1: config 1 has an invalid interface number: 2 but max is 0
usb 2-1: config 1 has no interface number 0
usb 2-1: New USB device found, idVendor=0cf3, idProduct=9271, bcdDevice=
1.08
usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
general protection fault, probably for non-canonical address
0xdffffc0000000015: 0000 [#1] SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000a8-0x00000000000000af]
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0-rc5-syzkaller #0
Call Trace
__usb_hcd_giveback_urb+0x29a/0x550 drivers/usb/core/hcd.c:1650
usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1716
dummy_timer+0x1258/0x32ae drivers/usb/gadget/udc/dummy_hcd.c:1966
call_timer_fn+0x195/0x6f0 kernel/time/timer.c:1404
expire_timers kernel/time/timer.c:1449 [inline]
__run_timers kernel/time/timer.c:1773 [inline]
__run_timers kernel/time/timer.c:1740 [inline]
run_timer_softirq+0x5f9/0x1500 kernel/time/timer.c:1786
__do_softirq+0x21e/0x950 kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x178/0x1a0 kernel/softirq.c:413
exiting_irq arch/x86/include/asm/apic.h:546 [inline]
smp_apic_timer_interrupt+0x141/0x540 arch/x86/kernel/apic/apic.c:1146
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
Reported-and-tested-by: syzbot+40d5d2e8a4680952f042@syzkaller.appspotmail.com
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
---
drivers/net/wireless/ath/ath9k/hif_usb.c | 48 ++++++++++++++++++------
drivers/net/wireless/ath/ath9k/hif_usb.h | 5 +++
2 files changed, 42 insertions(+), 11 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c
index 6049d3766c64..4ed21dad6a8e 100644
--- a/drivers/net/wireless/ath/ath9k/hif_usb.c
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.c
@@ -643,9 +643,9 @@ static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
static void ath9k_hif_usb_rx_cb(struct urb *urb)
{
- struct sk_buff *skb = (struct sk_buff *) urb->context;
- struct hif_device_usb *hif_dev =
- usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
+ struct rx_buf *rx_buf = (struct rx_buf *)urb->context;
+ struct hif_device_usb *hif_dev = rx_buf->hif_dev;
+ struct sk_buff *skb = rx_buf->skb;
int ret;
if (!skb)
@@ -685,14 +685,15 @@ static void ath9k_hif_usb_rx_cb(struct urb *urb)
return;
free:
kfree_skb(skb);
+ kfree(rx_buf);
}
static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
{
- struct sk_buff *skb = (struct sk_buff *) urb->context;
+ struct rx_buf *rx_buf = (struct rx_buf *)urb->context;
+ struct hif_device_usb *hif_dev = rx_buf->hif_dev;
+ struct sk_buff *skb = rx_buf->skb;
struct sk_buff *nskb;
- struct hif_device_usb *hif_dev =
- usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
int ret;
if (!skb)
@@ -750,6 +751,7 @@ static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
return;
free:
kfree_skb(skb);
+ kfree(rx_buf);
urb->context = NULL;
}
@@ -795,7 +797,7 @@ static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
init_usb_anchor(&hif_dev->mgmt_submitted);
for (i = 0; i < MAX_TX_URB_NUM; i++) {
- tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL);
+ tx_buf = kzalloc(sizeof(*tx_buf), GFP_KERNEL);
if (!tx_buf)
goto err;
@@ -832,8 +834,9 @@ static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
{
- struct urb *urb = NULL;
+ struct rx_buf *rx_buf = NULL;
struct sk_buff *skb = NULL;
+ struct urb *urb = NULL;
int i, ret;
init_usb_anchor(&hif_dev->rx_submitted);
@@ -841,6 +844,12 @@ static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
for (i = 0; i < MAX_RX_URB_NUM; i++) {
+ rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL);
+ if (!rx_buf) {
+ ret = -ENOMEM;
+ goto err_rxb;
+ }
+
/* Allocate URB */
urb = usb_alloc_urb(0, GFP_KERNEL);
if (urb == NULL) {
@@ -855,11 +864,14 @@ static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
goto err_skb;
}
+ rx_buf->hif_dev = hif_dev;
+ rx_buf->skb = skb;
+
usb_fill_bulk_urb(urb, hif_dev->udev,
usb_rcvbulkpipe(hif_dev->udev,
USB_WLAN_RX_PIPE),
skb->data, MAX_RX_BUF_SIZE,
- ath9k_hif_usb_rx_cb, skb);
+ ath9k_hif_usb_rx_cb, rx_buf);
/* Anchor URB */
usb_anchor_urb(urb, &hif_dev->rx_submitted);
@@ -885,6 +897,8 @@ static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
err_skb:
usb_free_urb(urb);
err_urb:
+ kfree(rx_buf);
+err_rxb:
ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
return ret;
}
@@ -896,14 +910,21 @@ static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev)
static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev)
{
- struct urb *urb = NULL;
+ struct rx_buf *rx_buf = NULL;
struct sk_buff *skb = NULL;
+ struct urb *urb = NULL;
int i, ret;
init_usb_anchor(&hif_dev->reg_in_submitted);
for (i = 0; i < MAX_REG_IN_URB_NUM; i++) {
+ rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL);
+ if (!rx_buf) {
+ ret = -ENOMEM;
+ goto err_rxb;
+ }
+
/* Allocate URB */
urb = usb_alloc_urb(0, GFP_KERNEL);
if (urb == NULL) {
@@ -918,11 +939,14 @@ static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev)
goto err_skb;
}
+ rx_buf->hif_dev = hif_dev;
+ rx_buf->skb = skb;
+
usb_fill_int_urb(urb, hif_dev->udev,
usb_rcvintpipe(hif_dev->udev,
USB_REG_IN_PIPE),
skb->data, MAX_REG_IN_BUF_SIZE,
- ath9k_hif_usb_reg_in_cb, skb, 1);
+ ath9k_hif_usb_reg_in_cb, rx_buf, 1);
/* Anchor URB */
usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
@@ -948,6 +972,8 @@ static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev)
err_skb:
usb_free_urb(urb);
err_urb:
+ kfree(rx_buf);
+err_rxb:
ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
return ret;
}
diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.h b/drivers/net/wireless/ath/ath9k/hif_usb.h
index a94e7e1c86e9..5985aa15ca93 100644
--- a/drivers/net/wireless/ath/ath9k/hif_usb.h
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.h
@@ -86,6 +86,11 @@ struct tx_buf {
struct list_head list;
};
+struct rx_buf {
+ struct sk_buff *skb;
+ struct hif_device_usb *hif_dev;
+};
+
#define HIF_USB_TX_STOP BIT(0)
#define HIF_USB_TX_FLUSH BIT(1)
--
2.17.1
next prev parent reply other threads:[~2020-04-04 4:19 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-04 4:18 [PATCH 0/5] ath9k: bug fixes Qiujun Huang
2020-04-04 4:18 ` [PATCH 1/5] ath9k: Fix use-after-free Read in htc_connect_service Qiujun Huang
2020-04-07 5:01 ` Kalle Valo
2020-04-07 10:51 ` Dan Carpenter
2020-04-04 4:18 ` [PATCH 2/5] ath9k: Fix use-after-free Read in ath9k_wmi_ctrl_rx Qiujun Huang
2020-04-04 4:18 ` [PATCH 3/5] ath9k: Fix use-after-free Write in ath9k_htc_rx_msg Qiujun Huang
2020-04-04 4:18 ` [PATCH 4/5 resend] ath9x: Fix stack-out-of-bounds Write in ath9k_hif_usb_rx_cb Qiujun Huang
2020-04-04 4:18 ` Qiujun Huang [this message]
2020-04-07 12:50 ` [PATCH 5/5] ath9k: Fix general protection fault " Dan Carpenter
2020-06-20 21:04 ` [BISECTED REGRESSION] " Roman Mamedov
2020-06-22 14:36 ` Kalle Valo
2020-07-01 15:53 ` [PATCH] Revert "ath9k: Fix general protection fault in ath9k_hif_usb_rx_cb" Viktor Jägersküpper
2020-07-01 19:56 ` Roman Mamedov
2020-07-01 21:32 ` [PATCH v2] " Viktor Jägersküpper
2020-07-02 6:43 ` [PATCH] " Kalle Valo
2020-07-09 14:36 ` Viktor Jägersküpper
2020-07-13 14:26 ` Kalle Valo
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