+ mm-prevent-kasan-false-positives-in-kmemleak.patch added to -mm tree

+ mm-prevent-kasan-false-positives-in-kmemleak.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm: prevent KASAN false positives in kmemleak
has been added to the -mm tree.  Its filename is
     mm-prevent-kasan-false-positives-in-kmemleak.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/mm-prevent-kasan-false-positives-in-kmemleak.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/mm-prevent-kasan-false-positives-in-kmemleak.patch

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------------------------------------------------------
From: Dmitry Vyukov <dvyukov@google.com>
Subject: mm: prevent KASAN false positives in kmemleak

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.

Link: http://lkml.kernel.org/r/1466617631-68387-1-git-send-email-dvyukov@google.com
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/kmemleak.c |    2 ++
 1 file changed, 2 insertions(+)

diff -puN mm/kmemleak.c~mm-prevent-kasan-false-positives-in-kmemleak mm/kmemleak.c
--- a/mm/kmemleak.c~mm-prevent-kasan-false-positives-in-kmemleak
+++ a/mm/kmemleak.c
@@ -307,8 +307,10 @@ static void hex_dump_object(struct seq_f
 	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();
 }
 
 /*
_

Patches currently in -mm which might be from dvyukov@google.com are

mm-prevent-kasan-false-positives-in-kmemleak.patch