ipv6: fix return value check in fib6_add()

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@trendmicro.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 13690d650c3e227de6579ed6ee489fbff1cbddef..286acfc21250cd760565b182cbc2d3d4490463dd 100644 (file)
--- 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