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| author |   Kees Cook <keescook@chromium.org> | 2018-04-10 16:32:44 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-11 10:28:35 -0700 |
| commit | 2cfe0d3009418a132b93d78642a8059a38fe5944 (patch) | |
| tree | be663132e62f3c0bffff1db9b13ee895b2ce6707 /include/linux/compiler-clang.h | |
| parent | clang-format: add configuration file (diff) | |
| download | linux-dev-2cfe0d3009418a132b93d78642a8059a38fe5944.tar.xz linux-dev-2cfe0d3009418a132b93d78642a8059a38fe5944.zip | |
task_struct: only use anon struct under randstruct plugin
The original intent for always adding the anonymous struct in
task_struct was to make sure we had compiler coverage.
However, this caused pathological padding of 40 bytes at the start of
task_struct. Instead, move the anonymous struct to being only used when
struct layout randomization is enabled.
Link: http://lkml.kernel.org/r/20180327213609.GA2964@beast
Fixes: 29e48ce87f1e ("task_struct: Allow randomized")
Signed-off-by: Kees Cook <keescook@chromium.org>
Reported-by: Peter Zijlstra <peterz@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/compiler-clang.h')
| -rw-r--r-- | include/linux/compiler-clang.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h index d3f264a5b04d..ceb96ecab96e 100644 --- a/include/linux/compiler-clang.h +++ b/include/linux/compiler-clang.h @@ -17,9 +17,6 @@ */ #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) -#define randomized_struct_fields_start struct { -#define randomized_struct_fields_end }; - /* all clang versions usable with the kernel support KASAN ABI version 5 */ #define KASAN_ABI_VERSION 5 |