netdev - [PATCH] ipv6: fix return value check in fib6

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Date:	Fri, 21 Sep 2012 12:29:56 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	davem@...emloft.net, kuznet@....inr.ac.ru, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net
Cc:	yongjun_wei@...ndmicro.com.cn, netdev@...r.kernel.org
Subject: [PATCH] ipv6: fix return value check in fib6_add()

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

In case of error, the function fib6_add_1() returns ERR_PTR()
or NULL pointer. The ERR_PTR() case check is missing in fib6_add().

dpatch engine is used to generated this patch.
(https://github.com/weiyj/dpatch)

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 net/ipv6/ip6_fib.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 13690d6..286acfc 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -819,6 +819,10 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nl_info *info)
 					offsetof(struct rt6_info, rt6i_src),
 					allow_create, replace_required);
 
+			if (IS_ERR(sn)) {
+				err = PTR_ERR(sn);
+				sn = NULL;
+			}
 			if (!sn) {
 				/* If it is failed, discard just allocated
 				   root, and then (in st_failure) stale node


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