tipc: check return value of nlmsg_new

[ Upstream commit 78302fd405769c9a9379e9adda119d533dce2eed ]

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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/tipc/node.c b/net/tipc/node.c
index 5b3e1ea..db8fbc0 100644 (file)
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -2094,6 +2094,8 @@ 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;