[patch 07/20] nfnetlink_log: fix possible NULL pointer dereference

[Greg KH]

-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Michal Miroslaw <mirq-linux@xxxxxxxxxxxx>

[NETFILTER]: nfnetlink_log: fix possible NULL pointer dereference

Eliminate possible NULL pointer dereference in nfulnl_recv_config().

Signed-off-by: Michal Miroslaw <mirq-linux@xxxxxxxxxxxx>
Signed-off-by: Patrick McHardy <kaber@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 net/netfilter/nfnetlink_log.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -867,6 +867,9 @@ nfulnl_recv_config(struct sock *ctnl, st
 			ret = -EINVAL;
 			break;
 		}
+
+		if (!inst)
+			goto out;
 	} else {
 		if (!inst) {
 			UDEBUG("no config command, and no instance for "
@@ -920,6 +923,7 @@ nfulnl_recv_config(struct sock *ctnl, st
 
 out_put:
 	instance_put(inst);
+out:
 	return ret;
 }
 

-- 
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