| commit | b92a953cb7f727c42a15ac2ea59bf3cf9c39370d | [log] [tgz] |
|---|---|---|
| author | Mark Rutland <mark.rutland@arm.com> | Mon Sep 23 15:34:16 2019 -0700 |
| committer | Linus Torvalds <torvalds@linux-foundation.org> | Tue Sep 24 15:54:08 2019 -0700 |
| tree | 570be1078303f1f080a194accd659fc9d94a52c7 | |
| parent | ae8f06b31a83e54777514308a63f669a1fed519e [diff] |
lib/test_kasan.c: add roundtrip tests
In several places we need to be able to operate on pointers which have
gone via a roundtrip:
virt -> {phys,page} -> virt
With KASAN_SW_TAGS, we can't preserve the tag for SLUB objects, and the
{phys,page} -> virt conversion will use KASAN_TAG_KERNEL.
This patch adds tests to ensure that this works as expected, without
false positives which have recently been spotted [1,2] in testing.
[1] https://lore.kernel.org/linux-arm-kernel/20190819114420.2535-1-walter-zh.wu@mediatek.com/
[2] https://lore.kernel.org/linux-arm-kernel/20190819132347.GB9927@lakrids.cambridge.arm.com/
[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/20190821153927.28630-1-mark.rutland@arm.com
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>