tipc: check return value of nlmsg_new

Function nlmsg_new() will return a NULL pointer if there is no enough
memory, and its return value should be checked before it is used.
However, in function tipc_nl_node_get_monitor(), the validation of the
return value of function nlmsg_new() is missed. This patch fixes the
bug.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/tipc/node.c b/net/tipc/node.c
index 01b1f077603e..aeef8011ac7d 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -2098,6 +2098,8 @@ int tipc_nl_node_get_monitor(struct sk_buff *skb, struct genl_info *info)
         int err;
 
         msg.skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+        if (!msg.skb)
+                return -ENOMEM;
         msg.portid = info->snd_portid;
         msg.seq = info->snd_seq;