From: Eric Biggers ebiggers@google.com
[ Upstream commit cc40b7225151f611ef837f6403cfaeadc7af214a ]
dun_bytes needs to be less than or equal to the IV size of the encryption mode, not just less than or equal to BLK_CRYPTO_MAX_IV_SIZE.
Currently this doesn't matter since blk_crypto_init_key() is never actually passed invalid values, but we might as well fix this.
Fixes: a892c8d52c02 ("block: Inline encryption support for blk-mq") Signed-off-by: Eric Biggers ebiggers@google.com Link: https://lore.kernel.org/r/20210825055918.51975-1-ebiggers@kernel.org Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- block/blk-crypto.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/blk-crypto.c b/block/blk-crypto.c index c5bdaafffa29..103c2e2d50d6 100644 --- a/block/blk-crypto.c +++ b/block/blk-crypto.c @@ -332,7 +332,7 @@ int blk_crypto_init_key(struct blk_crypto_key *blk_key, const u8 *raw_key, if (mode->keysize == 0) return -EINVAL;
- if (dun_bytes == 0 || dun_bytes > BLK_CRYPTO_MAX_IV_SIZE) + if (dun_bytes == 0 || dun_bytes > mode->ivsize) return -EINVAL;
if (!is_power_of_2(data_unit_size))