ksmbd: use aead_request_free to match aead_request_alloc

Use aead_request_free() instead of kfree() to properly free memory
allocated by aead_request_alloc(). This ensures sensitive crypto data
is zeroed before being freed.

Fixes: e2f3448 ("cifsd: add server-side procedures for SMB3")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/smb/server/auth.c

@@ -1218,7 +1218,7 @@ int ksmbd_crypt_message(struct ksmbd_work *work, struct kvec *iov,
 free_sg:
 	kfree(sg);
 free_req:
-	kfree(req);
+	aead_request_free(req);
 free_ctx:
 	ksmbd_release_crypto_ctx(ctx);
 	return rc;