linux-kernel - [PATCH 6/7] net/netfilter/nfnetlink

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Message-Id: <1346258957-7649-8-git-send-email-Julia.Lawall@lip6.fr>
Date:	Wed, 29 Aug 2012 18:49:17 +0200
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Pablo Neira Ayuso <pablo@...filter.org>
Cc:	kernel-janitors@...r.kernel.org, Patrick McHardy <kaber@...sh.net>,
	"David S. Miller" <davem@...emloft.net>,
	netfilter-devel@...r.kernel.org, netfilter@...r.kernel.org,
	coreteam@...filter.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 6/7] net/netfilter/nfnetlink_log.c: fix error return code

From: Julia Lawall <Julia.Lawall@...6.fr>

Initialize return variable before exiting on an error path.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}

// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
 net/netfilter/nfnetlink_log.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index 4142aac..9ef5438 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -1002,8 +1002,10 @@ static int __init nfnetlink_log_init(void)
 
 #ifdef CONFIG_PROC_FS
 	if (!proc_create("nfnetlink_log", 0440,
-			 proc_net_netfilter, &nful_file_ops))
+			 proc_net_netfilter, &nful_file_ops)) {
+		status = -ENOMEM;
 		goto cleanup_logger;
+	}
 #endif
 	return status;
 

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