[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 46.897991][ T26] audit: type=1800 audit(1575416937.524:25): pid=8199 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 46.917050][ T26] audit: type=1800 audit(1575416937.524:26): pid=8199 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 46.938391][ T26] audit: type=1800 audit(1575416937.524:27): pid=8199 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.183' (ECDSA) to the list of known hosts. 2019/12/03 23:49:06 fuzzer started 2019/12/03 23:49:07 dialing manager at 10.128.0.26:42111 2019/12/03 23:49:07 syscalls: 2689 2019/12/03 23:49:07 code coverage: enabled 2019/12/03 23:49:07 comparison tracing: enabled 2019/12/03 23:49:07 extra coverage: extra coverage is not supported by the kernel 2019/12/03 23:49:07 setuid sandbox: enabled 2019/12/03 23:49:07 namespace sandbox: enabled 2019/12/03 23:49:07 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 23:49:07 fault injection: enabled 2019/12/03 23:49:07 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 23:49:07 net packet injection: enabled 2019/12/03 23:49:07 net device setup: enabled 2019/12/03 23:49:07 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 23:49:07 devlink PCI setup: PCI device 0000:00:10.0 is not available 23:49:08 executing program 0: r0 = socket$inet6(0xa, 0x3, 0x6b) ioctl(r0, 0x1000008912, &(0x7f0000000000)="0815b5055e0bcfe87b3071") r1 = socket$inet(0x2, 0x4000000000000001, 0x0) bind$inet(r1, &(0x7f0000000280)={0x2, 0x4e23, @multicast1}, 0x10) sendto$inet(r1, 0x0, 0x0, 0x200007fd, &(0x7f0000e68000)={0x2, 0x4e23, @local}, 0x10) setsockopt$SO_TIMESTAMPING(r1, 0x1, 0x41, &(0x7f0000000080)=0x655, 0x4) write$binfmt_elf64(r1, &(0x7f0000000640)={{0x7f, 0x45, 0x4c, 0x46, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x40}, [{}]}, 0x78) 23:49:08 executing program 1: bpf$PROG_LOAD(0x5, &(0x7f0000000180)={0x1, 0x3, &(0x7f0000000040)=@framed={{0x5, 0x0, 0x0, 0x0, 0x0, 0x71, 0x10, 0x3a}}, &(0x7f0000000080)='GPL\x04\x9c5\x14\xbfw-\xa0z\xe8.vY\n6\xf6I>\xc1\xab\x91\xb3\x97\xe4*\xbf\x1e\xa6\xcd\x8c\xd7t\'\xfc\x9a\x9e+qe\xf5+A\a\xbf\bP\xd8\x99\xdcR\xd0\x13\x17]\xdb\x1b/F <*\x05\xb7\"\xe3>Uo\xb2\xe3\xf3\x9a<\xde\x1f\xcaSd\x037\xec\x95aF\xbd\xbf\xcb\x11Pp\x19V1\xde]!\xa5\xea\x9ec\x8c+\xdbx\xa5\x01\xcaKn\xa3\x13\xd8%h\xf98,,?o\xab\xa6\xb4\xeeTy;N\xd2m\xae>R\"P)\xbb*\xc0\x00\x7fwuL?#\xce\xda\x98\t\xb9\xa9hJ\x94\n\xbc\xaa\x8c\xfc\xc7\x13>\xc4\"\xe9\xc88\x881\x8dA\xe9\xa4\x93\xf0\x19_\xe2Y\x96Q\xb8\x95\x04\xf5\xdb\xa1F%\xce#f\xf3=\x95\xdb\xa9/\x86ry\xca\xbfJ\xce\xdd\xc8Z\x8a\xf7\xa0\xfah\xd7g\xceQ6\xb9\xd0\xd1\x96lI\x9c\xb6\xbf4\xc2\x98\x86f\x97\x00'/248, 0x0, 0x0, 0x0, 0x0, 0x0, [], 0x0, 0x0, 0xffffffffffffffff, 0x8, &(0x7f0000000000), 0x8, 0x10, &(0x7f0000000000), 0x10}, 0x14) syzkaller login: [ 58.046876][ T8366] IPVS: ftp: loaded support on port[0] = 21 [ 58.191321][ T8366] chnl_net:caif_netlink_parms(): no params data found [ 58.239675][ T8366] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.248119][ T8366] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.257600][ T8366] device bridge_slave_0 entered promiscuous mode [ 58.267615][ T8366] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.274796][ T8366] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.285244][ T8366] device bridge_slave_1 entered promiscuous mode [ 58.312812][ T8366] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.324409][ T8366] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.352747][ T8366] team0: Port device team_slave_0 added 23:49:09 executing program 2: r0 = creat(&(0x7f0000000200)='./file1\x00', 0x0) socketpair$unix(0x1, 0x2, 0x0, &(0x7f0000000080)={0xffffffffffffffff, 0xffffffffffffffff}) r2 = dup(r1) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) write$binfmt_script(r0, &(0x7f00000001c0)=ANY=[@ANYRESDEC], 0x14) fallocate(r0, 0x10, 0x0, 0x8000) [ 58.361302][ T8366] team0: Port device team_slave_1 added [ 58.375257][ T8369] IPVS: ftp: loaded support on port[0] = 21 [ 58.421064][ T8366] device hsr_slave_0 entered promiscuous mode [ 58.477419][ T8366] device hsr_slave_1 entered promiscuous mode [ 58.603817][ T8366] netdevsim netdevsim0 netdevsim0: renamed from eth0 23:49:09 executing program 3: r0 = socket$inet6_sctp(0xa, 0x5, 0x84) setsockopt$inet_sctp6_SCTP_ENABLE_STREAM_RESET(r0, 0x84, 0x7b, &(0x7f00000000c0), 0x8) [ 58.654792][ T8366] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 58.719081][ T8366] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 58.775527][ T8371] IPVS: ftp: loaded support on port[0] = 21 [ 58.798739][ T8366] netdevsim netdevsim0 netdevsim3: renamed from eth3 23:49:09 executing program 4: mkdir(&(0x7f0000000140)='./file0\x00', 0x0) mount(0x0, &(0x7f0000000080)='./file0\x00', &(0x7f00000000c0)='sysfs\x00', 0x0, 0x0) chdir(&(0x7f00000001c0)='./file0/../file0\x00') r0 = open(&(0x7f0000000000)='.\x00', 0x0, 0x0) renameat2(r0, &(0x7f0000000040)='./bus\x00', r0, &(0x7f00000004c0)='./file1\x00', 0x1) [ 58.900625][ T8369] chnl_net:caif_netlink_parms(): no params data found [ 58.924077][ T8374] IPVS: ftp: loaded support on port[0] = 21 [ 58.961642][ T8366] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.968884][ T8366] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.976885][ T8366] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.984205][ T8366] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.115529][ T8369] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.123842][ T8369] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.132369][ T8369] device bridge_slave_0 entered promiscuous mode [ 59.180436][ T8369] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.188730][ T8369] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.199759][ T8369] device bridge_slave_1 entered promiscuous mode [ 59.215181][ T8366] 8021q: adding VLAN 0 to HW filter on device bond0 23:49:09 executing program 5: bpf$PROG_LOAD(0x5, &(0x7f000000e000)={0x10, 0x4, &(0x7f0000000040)=@framed={{0xffffffb4, 0x5, 0x0, 0x0, 0x0, 0x71, 0x10, 0x2e}, [@ldst={0x0, 0x0, 0x2}]}, &(0x7f0000003ff6)='G\x00', 0x5, 0xfd90, &(0x7f000000cf3d)=""/195, 0x0, 0x0, [], 0x0, 0x0, 0xffffffffffffffff, 0x8, &(0x7f0000000000), 0x0, 0x10, &(0x7f0000000080), 0xfffffffffffffffb}, 0x48) [ 59.242548][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.269305][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.279131][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 59.324876][ T8376] IPVS: ftp: loaded support on port[0] = 21 [ 59.384837][ T8366] 8021q: adding VLAN 0 to HW filter on device team0 [ 59.407206][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 59.415939][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 59.440129][ T8369] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.453220][ T8382] IPVS: ftp: loaded support on port[0] = 21 [ 59.479261][ T8371] chnl_net:caif_netlink_parms(): no params data found [ 59.491353][ T8369] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.509290][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 59.518102][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 59.527629][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.534704][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.581496][ T8369] team0: Port device team_slave_0 added [ 59.590510][ T8369] team0: Port device team_slave_1 added [ 59.614556][ T3207] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 59.624211][ T3207] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 59.633171][ T3207] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.640262][ T3207] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.648580][ T8374] chnl_net:caif_netlink_parms(): no params data found [ 59.670092][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 59.749962][ T8369] device hsr_slave_0 entered promiscuous mode [ 59.796602][ T8369] device hsr_slave_1 entered promiscuous mode [ 59.846335][ T8369] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.873149][ T8371] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.873177][ T8371] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.890403][ T8371] device bridge_slave_0 entered promiscuous mode [ 59.901519][ T8371] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.909935][ T8371] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.918223][ T8371] device bridge_slave_1 entered promiscuous mode [ 59.929774][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 59.939190][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 59.949636][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 59.958193][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 59.967775][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 59.977019][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 60.023523][ T8371] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.042894][ T8376] chnl_net:caif_netlink_parms(): no params data found [ 60.062385][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 60.071824][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 60.090809][ T8371] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.115657][ T3207] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 60.126363][ T3207] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 60.136188][ T8366] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 60.170883][ T8374] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.180083][ T8374] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.188088][ T8374] device bridge_slave_0 entered promiscuous mode [ 60.196227][ T8374] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.203383][ T8374] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.211379][ T8374] device bridge_slave_1 entered promiscuous mode [ 60.233565][ T8371] team0: Port device team_slave_0 added [ 60.241582][ T8376] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.249883][ T8376] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.257860][ T8376] device bridge_slave_0 entered promiscuous mode [ 60.292350][ T8371] team0: Port device team_slave_1 added [ 60.305521][ T8376] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.313920][ T8376] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.321881][ T8376] device bridge_slave_1 entered promiscuous mode [ 60.331863][ T8374] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.354327][ T8369] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 60.415608][ T8374] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.462379][ T8369] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 60.533316][ T8369] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 60.638456][ T8371] device hsr_slave_0 entered promiscuous mode [ 60.666748][ T8371] device hsr_slave_1 entered promiscuous mode [ 60.706630][ T8371] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.719815][ T8382] chnl_net:caif_netlink_parms(): no params data found [ 60.729764][ T8376] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.740004][ T8369] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 60.799450][ T3207] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 60.807046][ T3207] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 60.817017][ T8374] team0: Port device team_slave_0 added [ 60.834882][ T8376] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.861638][ T8376] team0: Port device team_slave_0 added [ 60.871036][ T8374] team0: Port device team_slave_1 added [ 60.890942][ T8376] team0: Port device team_slave_1 added [ 60.899413][ T8366] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 60.942728][ T8371] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 60.990981][ T8371] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 61.059187][ T8382] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.066597][ T8382] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.074335][ T8382] device bridge_slave_0 entered promiscuous mode [ 61.129120][ T8376] device hsr_slave_0 entered promiscuous mode [ 61.166654][ T8376] device hsr_slave_1 entered promiscuous mode [ 61.256306][ T8376] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.265957][ T8371] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 61.359063][ T8374] device hsr_slave_0 entered promiscuous mode [ 61.386682][ T8374] device hsr_slave_1 entered promiscuous mode [ 61.426393][ T8374] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.434496][ T8382] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.441698][ T8382] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.449731][ T8382] device bridge_slave_1 entered promiscuous mode [ 61.473083][ T8371] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 61.531754][ T8382] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.573127][ T8382] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.592987][ T8376] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 166.616065][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 166.622891][ C1] rcu: 1-...!: (10499 ticks this GP) idle=a16/1/0x4000000000000002 softirq=11844/11845 fqs=37 [ 166.633523][ C1] (t=10500 jiffies g=6937 q=77) [ 166.638454][ C1] rcu: rcu_preempt kthread starved for 10420 jiffies! g6937 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 166.649536][ C1] rcu: RCU grace-period kthread stack dump: [ 166.655416][ C1] rcu_preempt R running task 29032 10 2 0x80004000 [ 166.663314][ C1] Call Trace: [ 166.666611][ C1] __schedule+0x9a0/0xcc0 [ 166.670944][ C1] schedule+0x181/0x210 [ 166.675097][ C1] schedule_timeout+0x14f/0x240 [ 166.680118][ C1] ? run_local_timers+0x120/0x120 [ 166.688212][ C1] rcu_gp_kthread+0xed8/0x1770 [ 166.692988][ C1] kthread+0x332/0x350 [ 166.697307][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 166.702406][ C1] ? kthread_blkcg+0xe0/0xe0 [ 166.706988][ C1] ret_from_fork+0x24/0x30 [ 166.711406][ C1] NMI backtrace for cpu 1 [ 166.715735][ C1] CPU: 1 PID: 8379 Comm: kworker/1:4 Not tainted 5.4.0-syzkaller #0 [ 166.723777][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 166.733855][ C1] Workqueue: rcu_gp srcu_invoke_callbacks [ 166.739565][ C1] Call Trace: [ 166.742841][ C1] [ 166.745687][ C1] dump_stack+0x1fb/0x318 [ 166.750016][ C1] nmi_cpu_backtrace+0xaf/0x1a0 [ 166.754868][ C1] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 166.761011][ C1] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 166.767067][ C1] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 166.773298][ C1] arch_trigger_cpumask_backtrace+0x10/0x20 [ 166.780047][ C1] rcu_dump_cpu_stacks+0x15a/0x220 [ 166.785262][ C1] rcu_sched_clock_irq+0xe25/0x1ad0 [ 166.790644][ C1] ? trace_hardirqs_off+0x74/0x80 [ 166.796195][ C1] update_process_times+0x12d/0x180 [ 166.801487][ C1] tick_sched_timer+0x263/0x420 [ 166.806338][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 166.811887][ C1] __hrtimer_run_queues+0x403/0x840 [ 166.817155][ C1] hrtimer_interrupt+0x38c/0xda0 [ 166.822098][ C1] ? debug_smp_processor_id+0x9/0x20 [ 166.827415][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 166.833052][ C1] apic_timer_interrupt+0xf/0x20 [ 166.837972][ C1] [ 166.840903][ C1] RIP: 0010:__memcg_kmem_uncharge+0x210/0x2e0 [ 166.846979][ C1] Code: e8 65 db a4 ff 48 c7 c7 98 4b 0d 89 e8 59 97 00 00 bf 01 00 00 00 e8 2f e3 9b ff 65 8b 05 d4 fd 4a 7e 85 c0 74 53 48 83 c4 08 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 49 8d 5f 10 48 89 df be 08 00 00 [ 166.866591][ C1] RSP: 0018:ffffc900025279f0 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13 [ 166.874997][ C1] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000 [ 166.882980][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea00027acc00 [ 166.891116][ C1] RBP: ffffc90002527a18 R08: 000000000003a768 R09: ffffed101320fe8f [ 166.899106][ C1] R10: ffffed101320fe8f R11: 0000000000000000 R12: ffffea00027acc00 [ 166.907153][ C1] R13: 1ffffd40004f5987 R14: ffffea00027acc38 R15: 0000000000000000 [ 166.915150][ C1] free_thread_stack+0x12e/0x590 [ 166.920175][ C1] put_task_stack+0xa3/0x130 [ 166.924795][ C1] finish_task_switch+0x3f1/0x550 [ 166.929833][ C1] __schedule+0x9a8/0xcc0 [ 166.934588][ C1] ? ___preempt_schedule+0x16/0x18 [ 166.940518][ C1] preempt_schedule+0xdb/0x120 [ 166.945295][ C1] ? local_bh_enable+0x4/0x20 [ 166.949975][ C1] ___preempt_schedule+0x16/0x18 [ 166.954916][ C1] ? mark_lock+0x107/0x1650 [ 166.959409][ C1] __local_bh_enable_ip+0x17d/0x240 [ 166.964622][ C1] local_bh_enable+0x15/0x20 [ 166.969286][ C1] srcu_invoke_callbacks+0x18c/0x320 [ 166.974570][ C1] process_one_work+0x7ef/0x10d0 [ 166.979514][ C1] worker_thread+0xc01/0x1630 [ 166.984200][ C1] kthread+0x332/0x350 [ 166.988258][ C1] ? rcu_lock_release+0x30/0x30 [ 166.993094][ C1] ? kthread_blkcg+0xe0/0xe0 [ 166.997673][ C1] ret_from_fork+0x24/0x30