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Groups > linux.kernel > #1429026
| From | Dmitry Vyukov <dvyukov@google.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH] mm: prevent KASAN false positives in kmemleak |
| Date | 2016-06-22 19:50 +0200 |
| Message-ID | <rMUrL-6vZ-3@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
When kmemleak dumps contents of leaked objects it reads whole objects regardless of user-requested size. This upsets KASAN. Disable KASAN checks around object dump. Signed-off-by: Dmitry Vyukov <dvyukov@google.com> --- mm/kmemleak.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/kmemleak.c b/mm/kmemleak.c index e642992..04320d3 100644 --- a/mm/kmemleak.c +++ b/mm/kmemleak.c @@ -307,8 +307,10 @@ static void hex_dump_object(struct seq_file *seq, len = min_t(size_t, object->size, HEX_MAX_LINES * HEX_ROW_SIZE); seq_printf(seq, " hex dump (first %zu bytes):\n", len); + kasan_disable_current(); seq_hex_dump(seq, " ", DUMP_PREFIX_NONE, HEX_ROW_SIZE, HEX_GROUP_SIZE, ptr, len, HEX_ASCII); + kasan_enable_current(); } /* -- 2.8.0.rc3.226.g39d4020
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[PATCH] mm: prevent KASAN false positives in kmemleak Dmitry Vyukov <dvyukov@google.com> - 2016-06-22 19:50 +0200 Re: [PATCH] mm: prevent KASAN false positives in kmemleak Catalin Marinas <catalin.marinas@arm.com> - 2016-06-23 12:10 +0200
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