============================================= BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 32s! BUG: workqueue lockup - pool cpus=0-1 flags=0x4 nice=0 stuck for 32s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 pending: 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 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 in-flight: 6204:gc_worker workqueue events_unbound: flags=0x2 pwq 4: cpus=0-1 flags=0x4 nice=0 active=3/512 in-flight: 21:call_usermodehelper_exec_work, 3193:call_usermodehelper_exec_work pending: 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 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 writeback: flags=0x4e pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/256 pending: wb_workfn workqueue kblockd: flags=0x18 pwq 1: cpus=0 node=0 flags=0x0 nice=-20 active=1/256 pending: blk_mq_timeout_work pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=0s workers=7 idle: 24 17 3903 1652 6669 6557 pool 4: cpus=0-1 flags=0x4 nice=0 hung=32s workers=12 idle: 3339 3342 3195 9798 73 3358 5 35 3467 3351 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'. tc_dump_action: action bad kind netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'. tc_dump_action: action bad kind netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. device gre0 entered promiscuous mode netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. device lo entered promiscuous mode QAT: Invalid ioctl IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready QAT: Invalid ioctl netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. device gre0 entered promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. SELinux: unknown mount option xprt_adjust_timeout: rq_timeout = 0! SELinux: unknown mount option xprt_adjust_timeout: rq_timeout = 0! audit: type=1326 audit(1507482406.200:2706): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=21738 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7f97c79 code=0x0 audit: type=1326 audit(1507482406.233:2707): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=21738 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7f97c79 code=0x0 audit: type=1326 audit(1507482406.404:2708): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=21781 comm="syz-executor6" exe="/root/syz-executor6" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7f30c79 code=0xffff0000 audit: type=1326 audit(1507482406.537:2709): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=21781 comm="syz-executor6" exe="/root/syz-executor6" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7f30c79 code=0xffff0000 ptm ptm0: ldisc open failed (-12), clearing slot 0 sctp: [Deprecated]: syz-executor6 (pid 21843) Use of int in maxseg socket option. Use struct sctp_assoc_value instead audit: type=1326 audit(1507482406.741:2710): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=21851 comm="syz-executor5" exe="/root/syz-executor5" sig=9 arch=40000003 syscall=240 compat=1 ip=0xf7f90c79 code=0x0 audit: type=1326 audit(1507482406.839:2711): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=21851 comm="syz-executor5" exe="/root/syz-executor5" sig=9 arch=40000003 syscall=240 compat=1 ip=0xf7f90c79 code=0x0 device lo entered promiscuous mode nla_parse: 3 callbacks suppressed netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'. IPv6: NLM_F_REPLACE set, but no existing node found! netlink: 1 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'. IPv6: NLM_F_REPLACE set, but no existing node found! QAT: Invalid ioctl QAT: Invalid ioctl IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready audit: type=1326 audit(1507482408.315:2712): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=22139 comm="syz-executor1" exe="/root/syz-executor1" sig=9 arch=40000003 syscall=240 compat=1 ip=0xf7f11c79 code=0x0 audit: type=1326 audit(1507482408.449:2713): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=22139 comm="syz-executor1" exe="/root/syz-executor1" sig=9 arch=40000003 syscall=240 compat=1 ip=0xf7f11c79 code=0x0 netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'. sock: sock_set_timeout: `syz-executor7' (pid 22305) tries to set negative timeout sock: sock_set_timeout: `syz-executor7' (pid 22305) tries to set negative timeout netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor5'. IPv6: ADDRCONF(NETDEV_CHANGE): syz1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): syz1: link becomes ready netlink: 7 bytes leftover after parsing attributes in process `syz-executor7'. PF_BRIDGE: br_mdb_parse() with unknown ifindex SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=22474 comm=syz-executor7