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| author | Alexander Potapenko <glider@google.com> | 2018-02-06 15:36:20 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-02-06 18:32:42 -0800 |
| commit | d321599cf6b861beefe92327476b617435c7fc4a (patch) | |
| tree | 8baa5c41552be1bdf011192cb0af20196422d3dd /mm/cma.h | |
| parent | 00a14294bb33af533f7ac002fb20623fdd8ea0d7 (diff) | |
| download | linux-d321599cf6b861beefe92327476b617435c7fc4a.tar.bz2 | |
kasan: add functions for unpoisoning stack variables
As a code-size optimization, LLVM builds since r279383 may bulk-manipulate
the shadow region when (un)poisoning large memory blocks. This requires
new callbacks that simply do an uninstrumented memset().
This fixes linking the Clang-built kernel when using KASAN.
[arnd@arndb.de: add declarations for internal functions]
Link: http://lkml.kernel.org/r/20180105094112.2690475-1-arnd@arndb.de
[fengguang.wu@intel.com: __asan_set_shadow_00 can be static]
Link: http://lkml.kernel.org/r/20171223125943.GA74341@lkp-ib03
[ghackmann@google.com: fix memset() parameters, and tweak commit message to describe new callbacks]
Link: http://lkml.kernel.org/r/20171204191735.132544-6-paullawrence@google.com
Signed-off-by: Alexander Potapenko <glider@google.com>
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/cma.h')
0 files changed, 0 insertions, 0 deletions