#5: (tasklist_lock){.?.?}, at: [] debug_show_all_locks+0xd3/0x400 kernel/locking/lockdep.c:4552 ============================================= BUG: workqueue lockup - pool cpus=1 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=3/256 in-flight: 17:console_callback pending: check_corruption, cache_reap pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256 pending: perf_sched_delayed, cache_reap, vmstat_shepherd workqueue events_long: flags=0x0 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 pending: gc_worker workqueue mm_percpu_wq: flags=0x8 pwq 2: cpus=1 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=2/256 pending: wb_workfn, wb_workfn pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=0s workers=6 idle: 23 3559 1376 4312 3556 PF_BRIDGE: RTM_SETLINK with unknown ifindex nla_parse: 5 callbacks suppressed netlink: 37 bytes leftover after parsing attributes in process `syz-executor4'. PF_BRIDGE: RTM_SETLINK with unknown ifindex netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 37 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor4'. QAT: Invalid ioctl 9pnet_virtio: no channels available for device ./control QAT: Invalid ioctl 9pnet_virtio: no channels available for device ./control SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=26906 comm=syz-executor5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=51 sclass=netlink_route_socket pig=26898 comm=syz-executor5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=26898 comm=syz-executor5 netlink: 1 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor2'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=26931 comm=syz-executor5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=51 sclass=netlink_route_socket pig=26931 comm=syz-executor5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=26931 comm=syz-executor5 netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. sctp: [Deprecated]: syz-executor2 (pid 27028) Use of int in max_burst socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor2 (pid 27028) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor2 (pid 27038) Use of int in max_burst socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor2 (pid 27038) Use of int in maxseg socket option. Use struct sctp_assoc_value instead QAT: Invalid ioctl QAT: Invalid ioctl audit: type=1326 audit(1507252642.759:812): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=27180 comm="syz-executor0" exe="/root/syz-executor0" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7fa4c79 code=0xffff0000 audit: type=1326 audit(1507252642.864:813): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=27180 comm="syz-executor0" exe="/root/syz-executor0" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7fa4c79 code=0xffff0000 Bearer <> rejected, illegal name Bearer <> rejected, illegal name QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl PF_BRIDGE: br_mdb_parse() with unknown ifindex PF_BRIDGE: br_mdb_parse() with unknown ifindex QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl device gre0 entered promiscuous mode device syz6 left promiscuous mode kvm [27550]: vcpu0, guest rIP: 0xfff0 Hyper-V uhandled wrmsr: 0x40000020 data 0x400 kvm [27550]: vcpu0, guest rIP: 0xfff0 Hyper-V uhandled wrmsr: 0x40000020 data 0x400 nla_parse: 21 callbacks suppressed netlink: 13 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 13 bytes leftover after parsing attributes in process `syz-executor7'. QAT: Invalid ioctl SELinux: unrecognized netlink message: protocol=4 nlmsg_type=28816 sclass=netlink_tcpdiag_socket pig=27699 comm=syz-executor7 QAT: Invalid ioctl SELinux: unrecognized netlink message: protocol=4 nlmsg_type=28816 sclass=netlink_tcpdiag_socket pig=27743 comm=syz-executor7 devpts: called with bogus options netlink: 1 bytes leftover after parsing attributes in process `syz-executor2'. audit: type=1326 audit(1507252647.829:814): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=27919 comm="syz-executor0" exe="/root/syz-executor0" sig=9 arch=40000003 syscall=240 compat=1 ip=0xf7fa4c79 code=0x0 netlink: 1 bytes leftover after parsing attributes in process `syz-executor2'. audit: type=1326 audit(1507252647.964:815): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=27919 comm="syz-executor0" exe="/root/syz-executor0" sig=9 arch=40000003 syscall=240 compat=1 ip=0xf7fa4c79 code=0x0 netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'. QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl