#5: (tasklist_lock){.?.?}, at: [] debug_show_all_locks+0xd3/0x400 kernel/locking/lockdep.c:4552 ============================================= 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 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256 pending: console_callback, check_corruption workqueue events_unbound: flags=0x2 pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/512 in-flight: 4309:call_usermodehelper_exec_work pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=11 idle: 28 21 499 5 5632 5086 4520 460 3407 TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. sctp: [Deprecated]: syz-executor3 (pid 22401) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl sctp: [Deprecated]: syz-executor3 (pid 22401) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl sctp: [Deprecated]: syz-executor4 (pid 22467) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor4 (pid 22490) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead RDS: rds_bind could not find a transport for 172.20.0.170, load rds_tcp or rds_rdma? RDS: rds_bind could not find a transport for 172.20.0.170, load rds_tcp or rds_rdma? netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 6 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 6 bytes leftover after parsing attributes in process `syz-executor1'. 9pnet_virtio: no channels available for device ./file0 9pnet_virtio: no channels available for device ./file0 kvm [22704]: vcpu0, guest rIP: 0x1000 disabled perfctr wrmsr: 0xc2 data 0x2 kvm [22704]: vcpu0, guest rIP: 0xaaa disabled perfctr wrmsr: 0xc2 data 0x2 netlink: 1 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor7'. syz4: Invalid MTU 4 requested, hw min 68 netlink: 21 bytes leftover after parsing attributes in process `syz-executor7'. syz4: Invalid MTU 4 requested, hw min 68 netlink: 21 bytes leftover after parsing attributes in process `syz-executor7'. audit: type=1326 audit(1507394488.141:364): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=22994 comm="syz-executor5" exe="/root/syz-executor5" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7ff5c79 code=0xffff0000 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=15566 sclass=netlink_route_socket pig=23013 comm=syz-executor3 audit: type=1326 audit(1507394488.212:365): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=22994 comm="syz-executor5" exe="/root/syz-executor5" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7ff5c79 code=0xffff0000 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=15566 sclass=netlink_route_socket pig=23013 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pig=23092 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=10 sclass=netlink_route_socket pig=23108 comm=syz-executor0 tc_ctl_action: received NO action attribs SELinux: unrecognized netlink message: protocol=0 nlmsg_type=65535 sclass=netlink_route_socket pig=23108 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=10 sclass=netlink_route_socket pig=23108 comm=syz-executor0 tc_ctl_action: received NO action attribs sctp: [Deprecated]: syz-executor1 (pid 23183) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor7 (pid 23218) Use of int in max_burst socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor1 (pid 23233) Use of int in max_burst socket option. Use struct sctp_assoc_value instead print_req_error: I/O error, dev loop3, sector 0 print_req_error: I/O error, dev loop3, sector 0 Buffer I/O error on dev loop3, logical block 0, async page read print_req_error: I/O error, dev loop3, sector 2 Buffer I/O error on dev loop3, logical block 1, async page read print_req_error: I/O error, dev loop3, sector 4 Buffer I/O error on dev loop3, logical block 2, async page read print_req_error: I/O error, dev loop3, sector 6 Buffer I/O error on dev loop3, logical block 3, async page read sctp: [Deprecated]: syz-executor7 (pid 23218) Use of int in max_burst socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor1 (pid 23247) Use of int in max_burst socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor6 (pid 23268) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor6 (pid 23273) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead QAT: Invalid ioctl QAT: Invalid ioctl sock: sock_set_timeout: `syz-executor4' (pid 23358) tries to set negative timeout sock: sock_set_timeout: `syz-executor4' (pid 23374) tries to set negative timeout audit: type=1326 audit(1507394491.104:366): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=23379 comm="" exe="/root/syz-executor6" sig=0 arch=40000003 syscall=240 compat=1 ip=0xf7f16c79 code=0x7ffc0000 audit: type=1326 audit(1507394491.104:367): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=23379 comm="" exe="/root/syz-executor6" sig=0 arch=40000003 syscall=240 compat=1 ip=0xf7f16c79 code=0x7ffc0000 audit: type=1326 audit(1507394491.109:368): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=23379 comm="" exe="/root/syz-executor6" sig=0 arch=40000003 syscall=54 compat=1 ip=0xf7f16c79 code=0x7ffc0000 audit: type=1326 audit(1507394491.109:369): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=23379 comm="" exe="/root/syz-executor6" sig=0 arch=40000003 syscall=240 compat=1 ip=0xf7f16c79 code=0x7ffc0000 audit: type=1326 audit(1507394491.110:370): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=23379 comm="" exe="/root/syz-executor6" sig=0 arch=40000003 syscall=240 compat=1 ip=0xf7f16c79 code=0x7ffc0000 audit: type=1326 audit(1507394491.118:371): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=23379 comm="" exe="/root/syz-executor6" sig=0 arch=40000003 syscall=192 compat=1 ip=0xf7f16c79 code=0x7ffc0000 audit: type=1326 audit(1507394491.119:372): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=23379 comm="" exe="/root/syz-executor6" sig=0 arch=40000003 syscall=240 compat=1 ip=0xf7f16c79 code=0x7ffc0000 audit: type=1326 audit(1507394491.120:373): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=23379 comm="" exe="/root/syz-executor6" sig=0 arch=40000003 syscall=240 compat=1 ip=0xf7f16c79 code=0x7ffc0000 nla_parse: 12 callbacks suppressed netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. QAT: Invalid ioctl netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl kauditd_printk_skb: 20 callbacks suppressed audit: type=1326 audit(1507394493.144:394): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=23678 comm="syz-executor2" exe="/root/syz-executor2" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7f32c79 code=0xffff0000 netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. audit: type=1326 audit(1507394493.263:395): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=23678 comm="syz-executor2" exe="/root/syz-executor2" sig=31 arch=40000003 syscall=240 compat=1 ip=0xf7f32c79 code=0xffff0000 netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'.