The patch titled
Subject: kasan: always taint kernel on report
has been added to the -mm tree. Its filename is
kasan-always-taint-kernel-on-report.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kasan-always-taint-kernel-on-report.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kasan-always-taint-kernel-on-report.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Subject: 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@xxxxxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Dmitriy Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/report.c | 1 +
1 file changed, 1 insertion(+)
diff -puN mm/kasan/report.c~kasan-always-taint-kernel-on-report mm/kasan/report.c
--- a/mm/kasan/report.c~kasan-always-taint-kernel-on-report
+++ a/mm/kasan/report.c
@@ -238,6 +238,7 @@ static void kasan_report_error(struct ka
}
pr_err("================================="
"=================================\n");
+ add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE);
spin_unlock_irqrestore(&report_lock, flags);
kasan_enable_current();
}
_
Patches currently in -mm which might be from aryabinin@xxxxxxxxxxxxx are
disable-wframe-larger-than-warnings-with-kasan=y.patch
mm-slub-kasan-enable-user-tracking-by-default-with-kasan=y.patch
kasan-always-taint-kernel-on-report.patch
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