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| author | Kees Cook <keescook@chromium.org> | 2024-03-09 12:24:48 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-13 13:07:40 +0200 |
| commit | 300a2b9c2b28282974ee300bb5d5025cbbb1f64c (patch) | |
| tree | 1a8a912255783f7b8443b8820b308f174e8b3314 /include/linux/debug_locks.h | |
| parent | 41671f0c0182b2bae74ca7e3b0f155559e3e2fc5 (diff) | |
randomize_kstack: Improve entropy diffusion
[ Upstream commit 9c573cd313433f6c1f7236fe64b9b743500c1628 ]
The kstack_offset variable was really only ever using the low bits for
kernel stack offset entropy. Add a ror32() to increase bit diffusion.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 39218ff4c625 ("stack: Optionally randomize kernel stack offset each syscall")
Link: https://lore.kernel.org/r/20240309202445.work.165-kees@kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/linux/debug_locks.h')
0 files changed, 0 insertions, 0 deletions