4.6-stable review patch. If anyone has any objections, please let me know.
------------------ From: Richard Alpe <[email protected]> [ Upstream commit 45e093ae2830cd1264677d47ff9a95a71f5d9f9c ] 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 <[email protected]> Signed-off-by: Richard Alpe <[email protected]> Acked-by: Jon Maloy <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- net/tipc/socket.c | 3 +++ 1 file changed, 3 insertions(+) --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -2807,6 +2807,9 @@ int tipc_nl_publ_dump(struct sk_buff *sk if (err) return err; + if (!attrs[TIPC_NLA_SOCK]) + return -EINVAL; + err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, attrs[TIPC_NLA_SOCK], tipc_nl_sock_policy);
