[PATCH 4.4 1/2] crypto: gcm - Fix error return code in crypto_gcm_create_common()

[Eric Biggers <ebiggers@kernel.org>]

From: Wei Yongjun <weiyongjun1@huawei.com>

commit 9b40f79c08e81234d759f188b233980d7e81df6c upstream.
[Please apply to 4.4-stable.]

Fix to return error code -EINVAL from the invalid alg ivsize error
handling case instead of 0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 crypto/gcm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/gcm.c b/crypto/gcm.c
index 0a12c09d7cb2b..f1c16589af8bb 100644
--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -670,11 +670,11 @@ static int crypto_gcm_create_common(struct crypto_template *tmpl,
 	ctr = crypto_skcipher_spawn_alg(&ctx->ctr);
 
 	/* We only support 16-byte blocks. */
+	err = -EINVAL;
 	if (ctr->cra_ablkcipher.ivsize != 16)
 		goto out_put_ctr;
 
 	/* Not a stream cipher? */
-	err = -EINVAL;
 	if (ctr->cra_blocksize != 1)
 		goto out_put_ctr;
 
-- 
2.21.0.1020.gf2820cf01a-goog