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| author | Marco Elver <elver@google.com> | 2021-05-04 18:40:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-05 11:27:27 -0700 |
| commit | 94868a1e127bbe0e03a4467f27196cd668cbc344 (patch) | |
| tree | c2e4043df74a4ca224270c4f8ab3772e89fa7007 /lib | |
| parent | 0c4ff27a0e541bcee167612fc9065623d75314a3 (diff) | |
| download | linux-stable-94868a1e127bbe0e03a4467f27196cd668cbc344.tar.gz linux-stable-94868a1e127bbe0e03a4467f27196cd668cbc344.tar.bz2 linux-stable-94868a1e127bbe0e03a4467f27196cd668cbc344.zip | |
kfence: zero guard page after out-of-bounds access
After an out-of-bounds accesses, zero the guard page before re-protecting
in kfence_guarded_free(). On one hand this helps make the failure mode of
subsequent out-of-bounds accesses more deterministic, but could also
prevent certain information leaks.
Link: https://lkml.kernel.org/r/20210312121653.348518-1-elver@google.com
Signed-off-by: Marco Elver <elver@google.com>
Acked-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Jann Horn <jannh@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions