From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Tiezhu Yang <yangtiezhu@loongson.cn>,
Steven Rostedt <rostedt@goodmis.org>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.14 15/49] MIPS: Fix kernel hang under FUNCTION_GRAPH_TRACER and PREEMPT_TRACER
Date: Mon, 14 Jun 2021 12:27:08 +0200 [thread overview]
Message-ID: <20210614102642.368893360@linuxfoundation.org> (raw)
In-Reply-To: <20210614102641.857724541@linuxfoundation.org>
From: Tiezhu Yang <yangtiezhu@loongson.cn>
[ Upstream commit 78cf0eb926cb1abeff2106bae67752e032fe5f3e ]
When update the latest mainline kernel with the following three configs,
the kernel hangs during startup:
(1) CONFIG_FUNCTION_GRAPH_TRACER=y
(2) CONFIG_PREEMPT_TRACER=y
(3) CONFIG_FTRACE_STARTUP_TEST=y
When update the latest mainline kernel with the above two configs (1)
and (2), the kernel starts normally, but it still hangs when execute
the following command:
echo "function_graph" > /sys/kernel/debug/tracing/current_tracer
Without CONFIG_PREEMPT_TRACER=y, the above two kinds of kernel hangs
disappeared, so it seems that CONFIG_PREEMPT_TRACER has some influences
with function_graph tracer at the first glance.
I use ejtag to find out the epc address is related with preempt_enable()
in the file arch/mips/lib/mips-atomic.c, because function tracing can
trace the preempt_{enable,disable} calls that are traced, replace them
with preempt_{enable,disable}_notrace to prevent function tracing from
going into an infinite loop, and then it can fix the kernel hang issue.
By the way, it seems that this commit is a complement and improvement of
commit f93a1a00f2bd ("MIPS: Fix crash that occurs when function tracing
is enabled").
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/mips/lib/mips-atomic.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/mips/lib/mips-atomic.c b/arch/mips/lib/mips-atomic.c
index 5530070e0d05..57497a26e79c 100644
--- a/arch/mips/lib/mips-atomic.c
+++ b/arch/mips/lib/mips-atomic.c
@@ -37,7 +37,7 @@
*/
notrace void arch_local_irq_disable(void)
{
- preempt_disable();
+ preempt_disable_notrace();
__asm__ __volatile__(
" .set push \n"
@@ -53,7 +53,7 @@ notrace void arch_local_irq_disable(void)
: /* no inputs */
: "memory");
- preempt_enable();
+ preempt_enable_notrace();
}
EXPORT_SYMBOL(arch_local_irq_disable);
@@ -61,7 +61,7 @@ notrace unsigned long arch_local_irq_save(void)
{
unsigned long flags;
- preempt_disable();
+ preempt_disable_notrace();
__asm__ __volatile__(
" .set push \n"
@@ -78,7 +78,7 @@ notrace unsigned long arch_local_irq_save(void)
: /* no inputs */
: "memory");
- preempt_enable();
+ preempt_enable_notrace();
return flags;
}
@@ -88,7 +88,7 @@ notrace void arch_local_irq_restore(unsigned long flags)
{
unsigned long __tmp1;
- preempt_disable();
+ preempt_disable_notrace();
__asm__ __volatile__(
" .set push \n"
@@ -106,7 +106,7 @@ notrace void arch_local_irq_restore(unsigned long flags)
: "0" (flags)
: "memory");
- preempt_enable();
+ preempt_enable_notrace();
}
EXPORT_SYMBOL(arch_local_irq_restore);
--
2.30.2
next prev parent reply other threads:[~2021-06-14 10:35 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-14 10:26 [PATCH 4.14 00/49] 4.14.237-rc1 review Greg Kroah-Hartman
2021-06-14 10:26 ` [PATCH 4.14 01/49] proc: Track /proc/$pid/attr/ opener mm_struct Greg Kroah-Hartman
2021-06-14 10:26 ` [PATCH 4.14 02/49] net/nfc/rawsock.c: fix a permission check bug Greg Kroah-Hartman
2021-06-14 10:26 ` [PATCH 4.14 03/49] ASoC: sti-sas: add missing MODULE_DEVICE_TABLE Greg Kroah-Hartman
2021-06-14 10:26 ` [PATCH 4.14 04/49] isdn: mISDN: netjet: Fix crash in nj_probe: Greg Kroah-Hartman
2021-06-14 10:26 ` [PATCH 4.14 05/49] bonding: init notify_work earlier to avoid uninitialized use Greg Kroah-Hartman
2021-06-14 10:26 ` [PATCH 4.14 06/49] netlink: disable IRQs for netlink_lock_table() Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 07/49] net: mdiobus: get rid of a BUG_ON() Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 08/49] cgroup: disable controllers at parse time Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 09/49] wq: handle VM suspension in stall detection Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 10/49] net/qla3xxx: fix schedule while atomic in ql_sem_spinlock Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 11/49] scsi: vmw_pvscsi: Set correct residual data length Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 12/49] scsi: target: qla2xxx: Wait for stop_phase1 at WWN removal Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 13/49] net: macb: ensure the device is available before accessing GEMGXL control registers Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 14/49] net: appletalk: cops: Fix data race in cops_probe1 Greg Kroah-Hartman
2021-06-14 10:27 ` Greg Kroah-Hartman [this message]
2021-06-14 10:27 ` [PATCH 4.14 16/49] bnx2x: Fix missing error code in bnx2x_iov_init_one() Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 17/49] powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P2041 i2c controllers Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 18/49] powerpc/fsl: set fsl,i2c-erratum-a004447 flag for P1010 " Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 19/49] i2c: mpc: Make use of i2c_recover_bus() Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 20/49] i2c: mpc: implement erratum A-004447 workaround Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 21/49] drm: Fix use-after-free read in drm_getunique() Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 22/49] drm: Lock pointer access in drm_master_release() Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 23/49] kvm: avoid speculation-based attacks from out-of-range memslot accesses Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 24/49] staging: rtl8723bs: Fix uninitialized variables Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 25/49] btrfs: return value from btrfs_mark_extent_written() in case of error Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 26/49] cgroup1: dont allow \n in renaming Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 27/49] USB: f_ncm: ncm_bitrate (speed) is unsigned Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 28/49] usb: dwc3: ep0: fix NULL pointer exception Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 29/49] usb: typec: ucsi: Clear PPM capability data in ucsi_init() error path Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 30/49] usb: gadget: f_fs: Ensure io_completion_wq is idle during unbind Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 31/49] USB: serial: ftdi_sio: add NovaTech OrionMX product ID Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 32/49] USB: serial: omninet: add device id for Zyxel Omni 56K Plus Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 33/49] USB: serial: quatech2: fix control-request directions Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 34/49] usb: gadget: eem: fix wrong eem header operation Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 35/49] usb: fix various gadgets null ptr deref on 10gbps cabling Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 36/49] usb: fix various gadget panics " Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 37/49] regulator: core: resolve supply for boot-on/always-on regulators Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 38/49] regulator: max77620: Use device_set_of_node_from_dev() Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 39/49] perf: Fix data race between pin_count increment/decrement Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 40/49] NFS: Fix a potential NULL dereference in nfs_get_client() Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 41/49] perf session: Correct buffer copying when peeking events Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 42/49] kvm: fix previous commit for 32-bit builds Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 43/49] NFS: Fix use-after-free in nfs4_init_client() Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 44/49] NFSv4: nfs4_proc_set_acl needs to restore NFS_CAP_UIDGID_NOMAP on error Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 45/49] scsi: core: Fix error handling of scsi_host_alloc() Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 46/49] scsi: core: Put .shost_dev in failure path if host state changes to RUNNING Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 47/49] scsi: core: Only put parent device if host state differs from SHOST_CREATED Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 48/49] ftrace: Do not blindly read the ip address in ftrace_bug() Greg Kroah-Hartman
2021-06-14 10:27 ` [PATCH 4.14 49/49] tracing: Correct the length check which causes memory corruption Greg Kroah-Hartman
2021-06-15 1:03 ` [PATCH 4.14 00/49] 4.14.237-rc1 review Samuel Zou
2021-06-15 9:53 ` Naresh Kamboju
2021-06-15 14:20 ` Guenter Roeck
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210614102642.368893360@linuxfoundation.org \
--to=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=rostedt@goodmis.org \
--cc=sashal@kernel.org \
--cc=stable@vger.kernel.org \
--cc=tsbogend@alpha.franken.de \
--cc=yangtiezhu@loongson.cn \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).