diff options
| author | Anton Blanchard <anton@samba.org> | 2009-02-22 01:50:05 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-02-23 15:53:21 +1100 |
| commit | a5adc91a4b44b5d1706b9d906cc14fe4f312afe9 (patch) | |
| tree | f0f5053b44b53fea4065bd05aeb9f0a53090d9dd /arch/powerpc/kernel/process.c | |
| parent | 912f9ee21c836081e3c96dfe61025841ebeb95da (diff) | |
powerpc: Ensure random space between stack and mmaps
get_random_int() returns the same value within a 1 jiffy interval. This means
that the mmap and stack regions will almost always end up the same distance
apart, making a relative offset based attack possible.
To fix this, shift the randomness we use for the mmap region by 1 bit.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/process.c')
0 files changed, 0 insertions, 0 deletions