From: Eric Biggers <ebiggers@xxxxxxxxxx>
Commit c778f96bf347 ("crypto: lrw - Optimize tweak computation")
incorrectly reduced the alignmask of LRW instances from
'__alignof__(u64) - 1' to '__alignof__(__be32) - 1'.
However, xor_tweak() and setkey() assume that the data and key,
respectively, are aligned to 'be128', which has u64 alignment.
Fix the alignmask to be at least '__alignof__(be128) - 1'.
Fixes: c778f96bf347 ("crypto: lrw - Optimize tweak computation")
Cc: <stable@xxxxxxxxxxxxxxx> # v4.20+
Cc: Ondrej Mosnacek <omosnace@xxxxxxxxxx>
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
crypto/lrw.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/crypto/lrw.c b/crypto/lrw.c
index fa302f3f161e0..b43ea285b8c79 100644
--- a/crypto/lrw.c
+++ b/crypto/lrw.c
@@ -388,7 +388,7 @@ static int create(struct crypto_template *tmpl, struct rtattr **tb)
inst->alg.base.cra_priority = alg->base.cra_priority;
inst->alg.base.cra_blocksize = LRW_BLOCK_SIZE;
inst->alg.base.cra_alignmask = alg->base.cra_alignmask |
- (__alignof__(__be32) - 1);
+ (__alignof__(be128) - 1);
inst->alg.ivsize = LRW_BLOCK_SIZE;
inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg) +
--
2.22.0.rc1.257.g3120a18244-goog
