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| author | Kees Cook <keescook@chromium.org> | 2023-09-15 13:03:45 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2023-10-02 09:48:52 -0700 |
| commit | 6521ba56ca86c19328f956090e367eacee4eb9d1 (patch) | |
| tree | 37bcfcf0c526743fbb5685a0a383c45f0b8d1692 | |
| parent | e3260d90c8f35c03ce182bfd2eeea75805586c25 (diff) | |
| download | linux-6521ba56ca86c19328f956090e367eacee4eb9d1.tar.gz linux-6521ba56ca86c19328f956090e367eacee4eb9d1.tar.bz2 linux-6521ba56ca86c19328f956090e367eacee4eb9d1.zip | |
dm crypt: Annotate struct crypt_config 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 crypt_config.
[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/20230915200344.never.272-kees@kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
| -rw-r--r-- | drivers/md/dm-crypt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index f2662c21a6df..f276e9460feb 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -224,7 +224,7 @@ struct crypt_config { struct mutex bio_alloc_lock; u8 *authenc_key; /* space for keys in authenc() format (if used) */ - u8 key[]; + u8 key[] __counted_by(key_size); }; #define MIN_IOS 64 |