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| author | Venki Pallipadi <venkatesh.pallipadi@intel.com> | 2008-05-14 16:05:51 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-05-14 19:11:15 -0700 |
| commit | 1c12c4cf9411eb130b245fa8d0fbbaf989477c7b (patch) | |
| tree | f61d58e955b3159007ef77513c1c4f1ed2c9ec23 /mm/page_alloc.c | |
| parent | 44c81433e8b05dbc85985d939046f10f95901184 (diff) | |
| download | lwn-1c12c4cf9411eb130b245fa8d0fbbaf989477c7b.tar.gz lwn-1c12c4cf9411eb130b245fa8d0fbbaf989477c7b.zip | |
mprotect: prevent alteration of the PAT bits
There is a defect in mprotect, which lets the user change the page cache
type bits by-passing the kernel reserve_memtype and free_memtype
wrappers. Fix the problem by not letting mprotect change the PAT bits.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
0 files changed, 0 insertions, 0 deletions