On Sat, Jan 25, 2020 at 08:39:25PM +0100, Kadlecsik József wrote: > find_set_and_id() is called when the NFNL_SUBSYS_IPSET mutex is held. > However, in the error path there can be a follow-up recvmsg() without > the mutex held. Use the start() function of struct netlink_dump_control > instead of dump() to verify and report if the specified set does not > exist. Applied, thanks Jozsef.