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kasan: always taint kernel on report

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Currently we already taint the kernel in some cases.  E.g.  if we hit some
bug in slub memory we call object_err() which will taint the kernel with
TAINT_BAD_PAGE flag.  But for other kind of bugs kernel left untainted.

Always taint with TAINT_BAD_PAGE if kasan found some bug.  This is useful
for automated testing.

Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrey Ryabinin 2015-11-05 18:51:26 -08:00 committed by Linus Torvalds
parent 89d3c87e20
commit eb06f43f1c
1 changed files with 1 additions and 0 deletions
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1
mm/kasan/report.c
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@ -238,6 +238,7 @@ static void kasan_report_error(struct kasan_access_info *info)
}
pr_err("================================="
"=================================\n");
add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE);
spin_unlock_irqrestore(&report_lock, flags);
kasan_enable_current();
}