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Date:	Mon, 16 May 2016 11:14:54 +0200
From:	Richard Alpe <>
To:	<>
CC:	<>, <>,
	Richard Alpe <>
Subject: [PATCH net-next] tipc: check nl sock before parsing nested attributes

Make sure the socket for which the user is listing publication exists
before parsing the socket netlink attributes.

Prior to this patch a call without any socket caused a NULL pointer
dereference in tipc_nl_publ_dump().

Tested-and-reported-by: Baozeng Ding <>
Signed-off-by: Richard Alpe <>
 net/tipc/socket.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 1262889..3b7a799 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -2853,6 +2853,9 @@ int tipc_nl_publ_dump(struct sk_buff *skb, struct netlink_callback *cb)
 		if (err)
 			return err;
+		if (!attrs[TIPC_NLA_SOCK])
+			return -EINVAL;
 		err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX,

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