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45e093ae28
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 <sploving1@gmail.com> Signed-off-by: Richard Alpe <richard.alpe@ericsson.com> Acked-by: Jon Maloy <jon.maloy@ericsson.cm> Signed-off-by: David S. Miller <davem@davemloft.net>