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authorAndrey Ryabinin <aryabinin@virtuozzo.com>2015-11-05 18:51:26 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-05 19:34:48 -0800
commiteb06f43f1c94d502b7867b0998e92cdabbc060bc (patch)
treed4d09f917ef5998069050c0de565b2c81585ba98
parent89d3c87e20d95e3238eac85e43de7b3cb1f39d8b (diff)
kasan: always taint kernel on report
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>
-rw-r--r--mm/kasan/report.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index f5e068afb58e..12f222d0224b 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -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();
}