diff options
| author | Kees Cook <keescook@chromium.org> | 2023-09-15 13:04:08 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2023-10-02 09:48:53 -0700 |
| commit | 96d7c65939793c2efc16e43c81a92aed9eed0d78 (patch) | |
| tree | 08d4d79249e4aa2ca02512e200349f9e4ea78d8b | |
| parent | 37d27cf1f5836a5f889e66bee755254d4a1faf72 (diff) | |
dm: Annotate struct dm_bio_prison 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 dm_bio_prison.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mike Snitzer <snitzer@kernel.org>
Cc: dm-devel@redhat.com
Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230915200407.never.611-kees@kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
| -rw-r--r-- | drivers/md/dm-bio-prison-v1.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-bio-prison-v1.c b/drivers/md/dm-bio-prison-v1.c index 92afdca760ae..9ab32abe5ed4 100644 --- a/drivers/md/dm-bio-prison-v1.c +++ b/drivers/md/dm-bio-prison-v1.c @@ -26,7 +26,7 @@ struct prison_region { struct dm_bio_prison { mempool_t cell_pool; unsigned int num_locks; - struct prison_region regions[]; + struct prison_region regions[] __counted_by(num_locks); }; static struct kmem_cache *_cell_cache; |