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| author | Daniel Micay <danielmicay@gmail.com> | 2017-07-07 00:36:47 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-07 01:24:31 +0200 |
| commit | ac34ceaf1cdb34e8c34c0873ee562e9df6087cbc (patch) | |
| tree | f06d0c4f732aabe00f879dfb0a33b2d9ada3beae /mm/mmap.c | |
| parent | mm, sparsemem: break out of loops early (diff) | |
| download | linux-ac34ceaf1cdb34e8c34c0873ee562e9df6087cbc.tar.xz linux-ac34ceaf1cdb34e8c34c0873ee562e9df6087cbc.zip | |
mm/mmap.c: mark protection_map as __ro_after_init
The protection map is only modified by per-arch init code so it can be
protected from writes after the init code runs.
This change was extracted from PaX where it's part of KERNEXEC.
Link: http://lkml.kernel.org/r/20170510174441.26163-1-danielmicay@gmail.com
Signed-off-by: Daniel Micay <danielmicay@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index a5e3dcd75e79..5a0ba9788cdd 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -94,7 +94,7 @@ static void unmap_region(struct mm_struct *mm, * w: (no) no * x: (yes) yes */ -pgprot_t protection_map[16] = { +pgprot_t protection_map[16] __ro_after_init = { __P000, __P001, __P010, __P011, __P100, __P101, __P110, __P111, __S000, __S001, __S010, __S011, __S100, __S101, __S110, __S111 }; |