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UPSTREAM: kasan: support panic_on_warn

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If user sets panic_on_warn, he wants kernel to panic if there is
anything barely wrong with the kernel.  KASAN-detected errors are
definitely not less benign than an arbitrary kernel WARNING.

Panic after KASAN errors if panic_on_warn is set.

We use this for continuous fuzzing where we want kernel to stop and
reboot on any error.

Link: http://lkml.kernel.org/r/1476694764-31986-1-git-send-email-dvyukov@google.com
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Bug: 64145065
(cherry-picked from 5c5c1f36ce)
Change-Id: Iee7cbc4ffbce8eb8d827447fdf960a6520d10b00
Signed-off-by: Paul Lawrence <paullawrence@google.com>
This commit is contained in:
Dmitry Vyukov
2016-12-12 16:44:53 -08:00
committed by Paul Lawrence
parent 9542d2a012
commit 522e13a017
1 changed files with 2 additions and 0 deletions
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2
mm/kasan/report.c
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@@ -137,6 +137,8 @@ static void kasan_end_report(unsigned long *flags)
pr_err("==================================================================\n");
add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE);
spin_unlock_irqrestore(&report_lock, *flags);
if (panic_on_warn)
panic("panic_on_warn set ...\n");
kasan_enable_current();
}