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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/[email protected]
Signed-off-by: Dmitry Vyukov <[email protected]>
Acked-by: Andrey Ryabinin <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Dmitry Vyukov 2016-12-12 16:44:53 -08:00 • committed by Linus Torvalds
commit 5c5c1f36ce
1 changed files with 2 additions and 0 deletions
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2
mm/kasan/report.c
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@ -136,6 +136,8 @@ 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();
}