BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 30s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=4/256 in-flight: 10310:jump_label_update_timeout pending: perf_sched_delayed, key_garbage_collector, cache_reap pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256 pending: console_callback, vmstat_shepherd, cache_reap workqueue events_long: flags=0x0 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 pending: gc_worker workqueue events_unbound: flags=0x2 pwq 4: cpus=0-1 flags=0x4 nice=0 active=2/512 in-flight: 5:call_usermodehelper_exec_work, 3325:call_usermodehelper_exec_work workqueue events_power_efficient: flags=0x80 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 pending: neigh_periodic_work pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256 pending: neigh_periodic_work, do_cache_clean workqueue mm_percpu_wq: flags=0x8 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 pending: vmstat_update pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 pending: vmstat_update workqueue kblockd: flags=0x18 pwq 1: cpus=0 node=0 flags=0x0 nice=-20 active=1/256 pending: blk_timeout_work netlink: 16 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 6 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 6 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 2 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 2 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=30621 comm=syz-executor5 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl SELinux: unrecognized netlink message: protocol=0 nlmsg_type=56899 sclass=netlink_route_socket pig=30646 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=56899 sclass=netlink_route_socket pig=30648 comm=syz-executor6 kauditd_printk_skb: 50 callbacks suppressed audit: type=1326 audit(1507481444.818:818): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=30697 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7f24c79 code=0xffff0000 audit: type=1326 audit(1507481444.913:819): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=30697 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7f24c79 code=0xffff0000 sctp: [Deprecated]: syz-executor2 (pid 30773) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor2 (pid 30789) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead audit: type=1326 audit(1507481445.353:820): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=30822 comm="syz-executor3" exe="/root/syz-executor3" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7f57c79 code=0xffff0000 audit: type=1326 audit(1507481445.472:821): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=30822 comm="syz-executor3" exe="/root/syz-executor3" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7f57c79 code=0xffff0000 sctp: [Deprecated]: syz-executor3 (pid 31084) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor3 (pid 31091) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl device gre0 entered promiscuous mode nla_parse: 1 callbacks suppressed netlink: 16 bytes leftover after parsing attributes in process `syz-executor5'. SELinux: unrecognized netlink message: protocol=4 nlmsg_type=1792 sclass=netlink_tcpdiag_socket pig=31508 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=1792 sclass=netlink_tcpdiag_socket pig=31508 comm=syz-executor3 8021q: VLANs not supported on lo netlink: 16 bytes leftover after parsing attributes in process `syz-executor5'. 8021q: VLANs not supported on lo netlink: 5 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor5'. device gre0 entered promiscuous mode sctp: [Deprecated]: syz-executor5 (pid 31691) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor5 (pid 31704) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready sctp: [Deprecated]: syz-executor5 (pid 31868) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor5 (pid 31868) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 2 bytes leftover after parsing attributes in process `syz-executor4'. IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready netlink: 2 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor7'. sctp: [Deprecated]: syz-executor7 (pid 32182) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor7 (pid 32221) Use of int in maxseg socket option. Use struct sctp_assoc_value instead device lo entered promiscuous mode device lo left promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode audit: type=1326 audit(1507481452.177:822): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=32282 comm="syz-executor4" exe="/root/syz-executor4" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7f8bc79 code=0xffff0000 audit: type=1326 audit(1507481452.351:823): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=32282 comm="syz-executor4" exe="/root/syz-executor4" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7f8bc79 code=0xffff0000