linux-kernel - [PATCH v2 6/6] net-PPP: Delete another unnecessary assignment in mppe

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Date:	Thu, 04 Dec 2014 23:20:21 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	Paul Mackerras <paulus@...ba.org>, linux-ppp@...r.kernel.org,
	netdev@...r.kernel.org, Eric Dumazet <eric.dumazet@...il.com>
CC:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH v2 6/6] net-PPP: Delete another unnecessary assignment in
 mppe_alloc()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Thu, 4 Dec 2014 22:42:30 +0100

The data structure element "sha1" was assigned a null pointer by the
mppe_alloc() after a function call "crypto_alloc_hash" failed.
It was determined that this element was not accessed by the implementation
of the crypto_free_blkcipher() function.

Let us delete it from the affected implementation because the element "sha1"
will not be accessible outside the function after the detected
allocation failure.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/net/ppp/ppp_mppe.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/ppp/ppp_mppe.c b/drivers/net/ppp/ppp_mppe.c
index b7db4b1..32cb054 100644
--- a/drivers/net/ppp/ppp_mppe.c
+++ b/drivers/net/ppp/ppp_mppe.c
@@ -208,10 +208,8 @@ static void *mppe_alloc(unsigned char *options, int optlen)
 		goto out_free;
 
 	state->sha1 = crypto_alloc_hash("sha1", 0, CRYPTO_ALG_ASYNC);
-	if (IS_ERR(state->sha1)) {
-		state->sha1 = NULL;
+	if (IS_ERR(state->sha1))
 		goto out_free_blkcipher;
-	}
 
 	digestsize = crypto_hash_digestsize(state->sha1);
 	if (digestsize < MPPE_MAX_KEY_LEN)
-- 
2.1.3

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