diff options
| author | Kees Cook <keescook@chromium.org> | 2023-09-22 20:53:28 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-10-19 00:34:12 +0300 |
| commit | b7c67206594a56be2407ae4da54a114c90609e53 (patch) | |
| tree | d0fa3b461cfd29f9c3b2f5ee508a953332931621 /include/linux/memcontrol.h | |
| parent | 30a89adf872d2e46323840964c95dc0ae3bb5843 (diff) | |
| download | linux-b7c67206594a56be2407ae4da54a114c90609e53.tar.xz | |
mm/memcg: annotate struct mem_cgroup_threshold_ary with __counted_by
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct
mem_cgroup_threshold_ary.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Link: https://lkml.kernel.org/r/20230922175327.work.985-kees@kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/memcontrol.h')
| -rw-r--r-- | include/linux/memcontrol.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 031102ac9311..c6029aeaa268 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -143,7 +143,7 @@ struct mem_cgroup_threshold_ary { /* Size of entries[] */ unsigned int size; /* Array of thresholds */ - struct mem_cgroup_threshold entries[]; + struct mem_cgroup_threshold entries[] __counted_by(size); }; struct mem_cgroup_thresholds { |