dm-crypt: Adjust crypt_alloc_tfms_aead() allocation type

In preparation for making the kmalloc family of allocators type aware,
we need to make sure that the returned type from the allocation matches
the type of the variable being assigned. (Before, the allocator would
always return "void *", which can be implicitly cast to any pointer type.)

The assigned type is "struct crypto_skcipher **" but the returned type
will be "struct crypto_aead **". These are the same allocation size
(pointer size), but the types don't match. Adjust the allocation type
to match the assignment.

Link: https://patch.msgid.link/20250426061629.work.266-kees@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index cd279a4f335d7f8d08aecad7de8495513babf680..339976d4c2ca0adad778027d7080580b6dd0b93e 100644 (file)
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -2364,7 +2364,7 @@ static int crypt_alloc_tfms_aead(struct crypt_config *cc, char *ciphermode)
 {
        int err;
 
-       cc->cipher_tfm.tfms = kmalloc(sizeof(struct crypto_aead *), GFP_KERNEL);
+       cc->cipher_tfm.tfms = kmalloc(sizeof(struct crypto_skcipher *), GFP_KERNEL);
        if (!cc->cipher_tfm.tfms)
                return -ENOMEM;