Revision - b8347c2 - x86/debug: Handle warnings before the notifier chain, to fix [...] - origin: https://github.com/torvalds/linux

visit type:

https://github.com/torvalds/linux

17 August 2024, 15:42:30 UTC

Revision b8347c2196492f4e1cccde3d92fda1cc2cc7de7e authored by Alexander Shishkin on 24 July 2017, 10:04:28 UTC, committed by Ingo Molnar on 10 November 2017, 07:04:19 UTC

x86/debug: Handle warnings before the notifier chain, to fix KGDB crash

Commit:

  9a93848fe787 ("x86/debug: Implement __WARN() using UD0")

turned warnings into UD0, but the fixup code only runs after the
notify_die() chain. This is a problem, in particular, with kgdb,
which kicks in as if it was a BUG().

Fix this by running the fixup code before the notifier chain in
the invalid op handler path.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Tested-by: Ilya Dryomov <idryomov@gmail.com>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Richard Weinberger <richard.weinberger@gmail.com>
Cc: <stable@vger.kernel.org> # v4.12+
Link: http://lkml.kernel.org/r/20170724100428.19173-1-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 parent be739f4

Files
Changes

Permalinks

Tip revision: b8347c2196492f4e1cccde3d92fda1cc2cc7de7e authored by Alexander Shishkin on 24 July 2017, 10:04:28 UTC
x86/debug: Handle warnings before the notifier chain, to fix KGDB crash

Tip revision: b8347c2

File	Mode	Size
Documentation
arch
block
certs
crypto
drivers
firmware
fs
include
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
tools
usr
virt
.cocciconfig	-rw-r--r--	59 bytes
.get_maintainer.ignore	-rw-r--r--	31 bytes
.gitattributes	-rw-r--r--	30 bytes
.gitignore	-rw-r--r--	1.3 KB
.mailmap	-rw-r--r--	8.6 KB
COPYING	-rw-r--r--	18.3 KB
CREDITS	-rw-r--r--	96.1 KB
Kbuild	-rw-r--r--	2.2 KB
Kconfig	-rw-r--r--	287 bytes
MAINTAINERS	-rw-r--r--	420.4 KB
Makefile	-rw-r--r--	58.4 KB
README	-rw-r--r--	722 bytes

Showing with 0 additions and 0 deletions (0 / 0 diffs computed)

Computing file changes ...

https://github.com/torvalds/linux

x86/debug: Handle warnings before the notifier chain, to fix KGDB crash

README