linux-kernel - [PATCH 4.4 022/241] crypto: gcm - Fix error return code in crypto_gcm_create

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Date:   Sun,  9 Jun 2019 18:39:24 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Wei Yongjun <weiyongjun1@...wei.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Eric Biggers <ebiggers@...gle.com>
Subject: [PATCH 4.4 022/241] crypto: gcm - Fix error return code in crypto_gcm_create_common()

From: Wei Yongjun <weiyongjun1@...wei.com>

commit 9b40f79c08e81234d759f188b233980d7e81df6c upstream.

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@...wei.com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Eric Biggers <ebiggers@...gle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 crypto/gcm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -670,11 +670,11 @@ static int crypto_gcm_create_common(stru
 	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;