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x86: fortify: kmsan: fix KMSAN fortify builds

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Ensure that KMSAN builds replace memset/memcpy/memmove calls with the
respective __msan_XXX functions, and that none of the macros are redefined
twice.  This should allow building kernel with both CONFIG_KMSAN and
CONFIG_FORTIFY_SOURCE.

Link: https://lkml.kernel.org/r/20221024212144.2852069-5-glider@google.com
Link: https://github.com/google/kmsan/issues/89
Signed-off-by: Alexander Potapenko <glider@google.com>
Reported-by: Tamas K Lengyel <tamas.lengyel@zentific.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Alexander Potapenko 2022-10-24 23:21:44 +02:00 • committed by Andrew Morton
parent 59c8a02e24
commit 78a498c3a2
4 changed files with 44 additions and 6 deletions
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1
mm/kmsan/instrumentation.c
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@ -14,6 +14,7 @@
#include "kmsan.h"
#include <linux/gfp.h>
#include <linux/kmsan_string.h>
#include <linux/mm.h>
#include <linux/uaccess.h>