Revision - f7d27c3 - x86/mm, kasan: Silence KASAN warnings in get_wchan() - origin: https://github.com/torvalds/linux

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05 April 2024, 19:05:47 UTC

Revision f7d27c35ddff7c100d7a98db499ac0040149ac05 authored by Andrey Ryabinin on 19 October 2015, 08:37:18 UTC, committed by Ingo Molnar on 20 October 2015, 09:04:19 UTC

x86/mm, kasan: Silence KASAN warnings in get_wchan()

get_wchan() is racy by design, it may access volatile stack
of running task, thus it may access redzone in a stack frame
and cause KASAN to warn about this.

Use READ_ONCE_NOCHECK() to silence these warnings.

Reported-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Kostya Serebryany <kcc@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wolfram Gloger <wmglo@dent.med.uni-muenchen.de>
Cc: kasan-dev <kasan-dev@googlegroups.com>
Link: http://lkml.kernel.org/r/1445243838-17763-3-git-send-email-aryabinin@virtuozzo.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Tip revision: f7d27c35ddff7c100d7a98db499ac0040149ac05 authored by Andrey Ryabinin on 19 October 2015, 08:37:18 UTC
x86/mm, kasan: Silence KASAN warnings in get_wchan()

Tip revision: f7d27c3

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
.get_maintainer.ignore	-rw-r--r--	31 bytes
.gitignore	-rw-r--r--	1.2 KB
.mailmap	-rw-r--r--	5.3 KB
COPYING	-rw-r--r--	18.3 KB
CREDITS	-rw-r--r--	94.9 KB
Kbuild	-rw-r--r--	2.6 KB
Kconfig	-rw-r--r--	252 bytes
MAINTAINERS	-rw-r--r--	319.7 KB
Makefile	-rw-r--r--	53.2 KB
README	-rw-r--r--	18.2 KB
REPORTING-BUGS	-rw-r--r--	7.3 KB

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x86/mm, kasan: Silence KASAN warnings in get_wchan()

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