netdev - [PATCH] ipv4: fix NULL checking in devinet

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Message-Id: <1357420764-12381-1-git-send-email-xi.wang@gmail.com>
Date:	Sat,  5 Jan 2013 16:19:24 -0500
From:	Xi Wang <xi.wang@...il.com>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, Xi Wang <xi.wang@...il.com>
Subject: [PATCH] ipv4: fix NULL checking in devinet_ioctl()

The NULL pointer check `!ifa' should come before its first use.

Signed-off-by: Xi Wang <xi.wang@...il.com>
---
 net/ipv4/devinet.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index cc06a47..a8e4f26 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -823,9 +823,9 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg)
 		if (!ifa) {
 			ret = -ENOBUFS;
 			ifa = inet_alloc_ifa();
-			INIT_HLIST_NODE(&ifa->hash);
 			if (!ifa)
 				break;
+			INIT_HLIST_NODE(&ifa->hash);
 			if (colon)
 				memcpy(ifa->ifa_label, ifr.ifr_name, IFNAMSIZ);
 			else
-- 
1.7.10.4

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