[ 41.645813][ T25] audit: type=1800 audit(1575373671.164:27): pid=7918 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 41.676410][ T25] audit: type=1800 audit(1575373671.164:28): pid=7918 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 42.473101][ T25] audit: type=1800 audit(1575373672.024:29): pid=7918 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 42.492308][ T25] audit: type=1800 audit(1575373672.024:30): pid=7918 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.50' (ECDSA) to the list of known hosts. 2019/12/03 11:48:03 fuzzer started 2019/12/03 11:48:04 dialing manager at 10.128.0.26:45711 2019/12/03 11:48:04 checking machine... 2019/12/03 11:48:04 checking revisions... 2019/12/03 11:48:04 testing simple program... syzkaller login: [ 54.983194][ T8084] IPVS: ftp: loaded support on port[0] = 21 2019/12/03 11:48:04 building call list... [ 55.316369][ T295] tipc: TX() has been purged, node left! [ 55.736000][ T8083] can: request_module (can-proto-0) failed. executing program [ 58.209134][ T8083] can: request_module (can-proto-0) failed. [ 58.220475][ T8083] can: request_module (can-proto-0) failed. 2019/12/03 11:48:11 syscalls: 2689 2019/12/03 11:48:11 code coverage: enabled 2019/12/03 11:48:11 comparison tracing: enabled 2019/12/03 11:48:11 extra coverage: extra coverage is not supported by the kernel 2019/12/03 11:48:11 setuid sandbox: enabled 2019/12/03 11:48:11 namespace sandbox: enabled 2019/12/03 11:48:11 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 11:48:11 fault injection: enabled 2019/12/03 11:48:11 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 11:48:11 net packet injection: enabled 2019/12/03 11:48:11 net device setup: enabled 2019/12/03 11:48:11 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 11:48:11 devlink PCI setup: PCI device 0000:00:10.0 is not available 11:48:12 executing program 0: r0 = socket$inet_udplite(0x2, 0x2, 0x88) ioctl(r0, 0x1000008912, &(0x7f00000000c0)="0300a1695e1dcfe87b1071") sendmsg$nl_generic(0xffffffffffffffff, &(0x7f0000000240)={0x0, 0x30e, &(0x7f0000000000)={0x0}}, 0x0) sendmsg$nl_generic(0xffffffffffffffff, &(0x7f0000000100)={0x0, 0xaa, &(0x7f0000000000)={&(0x7f0000000080)=ANY=[@ANYBLOB="2c0000001600ff8e00000000000000000a0000001800000014000200fe8800000000a2cd9700000000002200000000"], 0x2c}}, 0x0) r1 = socket(0x10, 0x3, 0x0) setsockopt$netlink_NETLINK_TX_RING(r1, 0x10e, 0xc, &(0x7f0000000040)={0x7ff}, 0x17f) sendmmsg$alg(r1, &(0x7f0000000140), 0x4924b68, 0x0) 11:48:12 executing program 1: socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000080)={0xffffffffffffffff}) socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000080)={0xffffffffffffffff}) r2 = dup3(r1, r0, 0x0) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) r3 = socket$key(0xf, 0x3, 0x2) sendmsg$key(r3, &(0x7f00005f5000)={0x0, 0x0, &(0x7f00008feff0)={&(0x7f000080e000)={0x2, 0xe, 0x0, 0x0, 0x14, 0x0, 0x0, 0x0, [@sadb_address={0x5, 0x6, 0x0, 0xffffff80, 0x0, @in6}, @sadb_x_policy={0x8, 0x12, 0x0, 0x2, 0x0, 0x0, 0x0, {0x6, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @in=@remote={0xac, 0x14, 0xffffffffffffffff}, @in=@loopback}}, @sadb_address={0x5, 0x5, 0x0, 0xffffff80, 0x0, @in6={0xa, 0x0, 0x0, @local={0xfe, 0x80, [], 0xffffffffffffffff}}}]}, 0xa0}}, 0x0) [ 63.142890][ T8129] IPVS: ftp: loaded support on port[0] = 21 11:48:12 executing program 2: syz_open_dev$sndseq(&(0x7f00000002c0)='/dev/snd/seq\x00', 0x0, 0x0) r0 = syz_open_dev$sndseq(0x0, 0x0, 0x0) r1 = dup2(r0, r0) ioctl$SNDRV_SEQ_IOCTL_REMOVE_EVENTS(r1, 0xc02c5341, &(0x7f0000000080)={0x0, @time}) [ 63.290346][ T8129] chnl_net:caif_netlink_parms(): no params data found [ 63.307263][ T8132] IPVS: ftp: loaded support on port[0] = 21 [ 63.363478][ T8129] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.385694][ T8129] bridge0: port 1(bridge_slave_0) entered disabled state [ 63.393954][ T8129] device bridge_slave_0 entered promiscuous mode [ 63.419961][ T8129] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.435940][ T8129] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.443899][ T8129] device bridge_slave_1 entered promiscuous mode [ 63.501501][ T8129] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 63.529471][ T8129] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link 11:48:13 executing program 3: r0 = syz_open_dev$vcsa(&(0x7f0000000000)='/dev/vcsa#\x00', 0x6, 0x60001) writev(r0, &(0x7f0000000a80)=[{&(0x7f0000000080)="18", 0x1}], 0x1) [ 63.572557][ T8134] IPVS: ftp: loaded support on port[0] = 21 [ 63.591684][ T8129] team0: Port device team_slave_0 added [ 63.649124][ T8129] team0: Port device team_slave_1 added [ 63.711521][ T8132] chnl_net:caif_netlink_parms(): no params data found [ 63.760476][ T8129] device hsr_slave_0 entered promiscuous mode 11:48:13 executing program 4: r0 = socket(0xa, 0x2, 0x0) getsockopt$sock_cred(r0, 0x1, 0x11, &(0x7f0000caaffb)={0x0, 0x0}, &(0x7f0000cab000)=0xa) setreuid(0x0, r1) setuid(r1) [ 63.815973][ T8129] device hsr_slave_1 entered promiscuous mode [ 63.895188][ T8137] IPVS: ftp: loaded support on port[0] = 21 11:48:13 executing program 5: r0 = syz_init_net_socket$bt_l2cap(0x1f, 0x3, 0x0) sendmsg$kcm(0xffffffffffffffff, &(0x7f0000000000)={0x0, 0x0, &(0x7f0000001100)}, 0x0) ioctl$sock_ifreq(r0, 0x89f1, &(0x7f0000000000)={'eql\x00\x00\x00\x01\x005\x00', @ifru_flags}) [ 64.061172][ T8134] chnl_net:caif_netlink_parms(): no params data found [ 64.085894][ T8129] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 64.095502][ T8140] IPVS: ftp: loaded support on port[0] = 21 [ 64.149363][ T8129] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 64.228132][ T8132] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.235226][ T8132] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.244451][ T8132] device bridge_slave_0 entered promiscuous mode [ 64.280588][ T8134] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.288694][ T8134] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.296770][ T8134] device bridge_slave_0 entered promiscuous mode [ 64.304104][ T8129] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 64.348380][ T8132] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.355790][ T8132] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.363713][ T8132] device bridge_slave_1 entered promiscuous mode [ 64.385241][ T8132] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 64.395245][ T8134] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.402828][ T8134] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.411008][ T8134] device bridge_slave_1 entered promiscuous mode [ 64.421759][ T8129] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 64.500693][ T8132] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 64.503011][ T8142] IPVS: ftp: loaded support on port[0] = 21 [ 64.551799][ T8132] team0: Port device team_slave_0 added [ 64.560490][ T8134] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 64.599037][ T8132] team0: Port device team_slave_1 added [ 64.606338][ T8134] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 64.629829][ T8134] team0: Port device team_slave_0 added [ 64.637833][ T8134] team0: Port device team_slave_1 added [ 64.688503][ T8134] device hsr_slave_0 entered promiscuous mode [ 64.756104][ T8134] device hsr_slave_1 entered promiscuous mode [ 64.805779][ T8134] debugfs: Directory 'hsr0' with parent '/' already present! [ 64.829534][ T8137] chnl_net:caif_netlink_parms(): no params data found [ 64.888494][ T8132] device hsr_slave_0 entered promiscuous mode [ 64.925996][ T8132] device hsr_slave_1 entered promiscuous mode [ 64.965748][ T8132] debugfs: Directory 'hsr0' with parent '/' already present! [ 65.003263][ T8129] 8021q: adding VLAN 0 to HW filter on device bond0 [ 65.014267][ T8134] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 65.038021][ T8134] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 65.129040][ T3008] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 65.138681][ T3008] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 65.147019][ T8134] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 65.211094][ T8137] bridge0: port 1(bridge_slave_0) entered blocking state [ 65.218514][ T8137] bridge0: port 1(bridge_slave_0) entered disabled state [ 65.226572][ T8137] device bridge_slave_0 entered promiscuous mode [ 65.253138][ T8134] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 65.316430][ T8129] 8021q: adding VLAN 0 to HW filter on device team0 [ 65.334216][ T8137] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.342034][ T8137] bridge0: port 2(bridge_slave_1) entered disabled state [ 65.350679][ T8137] device bridge_slave_1 entered promiscuous mode [ 65.372962][ T3008] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 65.385548][ T3008] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 65.394159][ T3008] bridge0: port 1(bridge_slave_0) entered blocking state [ 65.401564][ T3008] bridge0: port 1(bridge_slave_0) entered forwarding state [ 65.409756][ T8132] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 65.472692][ T8137] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 65.488544][ T8142] chnl_net:caif_netlink_parms(): no params data found [ 65.498450][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 65.510309][ T8140] chnl_net:caif_netlink_parms(): no params data found [ 65.521813][ T8132] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 65.579218][ T8137] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 65.617696][ T8132] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 65.637898][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 65.646760][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 65.655684][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.662761][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 65.670433][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 65.684992][ T8137] team0: Port device team_slave_0 added [ 65.694563][ T8137] team0: Port device team_slave_1 added [ 65.701473][ T8132] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 65.773662][ T8142] bridge0: port 1(bridge_slave_0) entered blocking state [ 65.782417][ T8142] bridge0: port 1(bridge_slave_0) entered disabled state [ 65.790383][ T8142] device bridge_slave_0 entered promiscuous mode [ 65.801016][ T8142] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.809479][ T8142] bridge0: port 2(bridge_slave_1) entered disabled state [ 65.819203][ T8142] device bridge_slave_1 entered promiscuous mode [ 65.839568][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 65.870449][ T8142] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 65.890449][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 65.900558][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 65.909730][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 65.918230][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 65.933142][ T8129] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 65.944178][ T8129] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 66.018993][ T8137] device hsr_slave_0 entered promiscuous mode [ 66.056046][ T8137] device hsr_slave_1 entered promiscuous mode [ 66.095859][ T8137] debugfs: Directory 'hsr0' with parent '/' already present! [ 66.104527][ T8142] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 66.119060][ T8140] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.127250][ T8140] bridge0: port 1(bridge_slave_0) entered disabled state [ 66.134812][ T8140] device bridge_slave_0 entered promiscuous mode [ 66.142160][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 66.152091][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 66.160693][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 66.169327][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 66.177926][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 66.203022][ T8140] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.211266][ T8140] bridge0: port 2(bridge_slave_1) entered disabled state [ 66.219805][ T8140] device bridge_slave_1 entered promiscuous mode [ 66.248340][ T8129] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 66.256929][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 66.264597][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 66.272124][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 66.282612][ T8142] team0: Port device team_slave_0 added [ 66.293215][ T8142] team0: Port device team_slave_1 added [ 66.301131][ T8140] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 66.313629][ T8140] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 66.355511][ T8140] team0: Port device team_slave_0 added [ 66.366852][ T8140] team0: Port device team_slave_1 added [ 66.428296][ T8142] device hsr_slave_0 entered promiscuous mode [ 66.476467][ T8142] device hsr_slave_1 entered promiscuous mode [ 66.536299][ T8142] debugfs: Directory 'hsr0' with parent '/' already present! [ 66.577428][ T8140] device hsr_slave_0 entered promiscuous mode [ 66.615997][ T8140] device hsr_slave_1 entered promiscuous mode [ 66.655868][ T8140] debugfs: Directory 'hsr0' with parent '/' already present! [ 66.706529][ T8137] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 66.735322][ T8134] 8021q: adding VLAN 0 to HW filter on device bond0 [ 66.760667][ T8137] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 171.755576][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 171.762356][ C1] rcu: 1-...!: (10499 ticks this GP) idle=eb6/1/0x4000000000000002 softirq=10355/10358 fqs=40 [ 171.772933][ C1] (t=10501 jiffies g=6845 q=105) [ 171.777970][ C1] rcu: rcu_preempt kthread starved for 10422 jiffies! g6845 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 171.789056][ C1] rcu: RCU grace-period kthread stack dump: [ 171.794934][ C1] rcu_preempt R running task 29104 10 2 0x80004000 [ 171.802823][ C1] Call Trace: [ 171.806112][ C1] __schedule+0x9a0/0xcc0 [ 171.810481][ C1] schedule+0x181/0x210 [ 171.814625][ C1] schedule_timeout+0x14f/0x240 [ 171.819565][ C1] ? run_local_timers+0x120/0x120 [ 171.824589][ C1] rcu_gp_kthread+0xed8/0x1770 [ 171.829458][ C1] kthread+0x332/0x350 [ 171.833521][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 171.838623][ C1] ? kthread_blkcg+0xe0/0xe0 [ 171.843208][ C1] ret_from_fork+0x24/0x30 [ 171.847653][ C1] NMI backtrace for cpu 1 [ 171.851968][ C1] CPU: 1 PID: 44 Comm: kworker/1:1 Not tainted 5.4.0-syzkaller #0 [ 171.859751][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 171.869805][ C1] Workqueue: ipv6_addrconf addrconf_dad_work [ 171.875766][ C1] Call Trace: [ 171.879038][ C1] [ 171.881887][ C1] dump_stack+0x1fb/0x318 [ 171.886210][ C1] nmi_cpu_backtrace+0xaf/0x1a0 [ 171.891044][ C1] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 171.897194][ C1] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 171.903257][ C1] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 171.909318][ C1] arch_trigger_cpumask_backtrace+0x10/0x20 [ 171.915207][ C1] rcu_dump_cpu_stacks+0x15a/0x220 [ 171.920397][ C1] rcu_sched_clock_irq+0xe25/0x1ad0 [ 171.925588][ C1] ? trace_hardirqs_off+0x74/0x80 [ 171.930606][ C1] update_process_times+0x12d/0x180 [ 171.935796][ C1] tick_sched_timer+0x263/0x420 [ 171.940651][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 171.946189][ C1] __hrtimer_run_queues+0x403/0x840 [ 171.951391][ C1] hrtimer_interrupt+0x38c/0xda0 [ 171.956341][ C1] ? debug_smp_processor_id+0x9/0x20 [ 171.961616][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 171.967149][ C1] apic_timer_interrupt+0xf/0x20 [ 171.972073][ C1] [ 171.975011][ C1] RIP: 0010:__memcg_kmem_uncharge+0x2e/0x2e0 [ 171.980989][ C1] Code: 41 57 41 56 41 55 41 54 53 50 89 f3 49 89 fc 48 b8 00 00 00 00 00 fc ff df 4c 8d 77 38 4d 89 f5 49 c1 ed 03 41 80 7c 05 00 00 <74> 08 4c 89 f7 e8 d8 f4 fa ff 4d 8b 3e b8 01 00 00 00 89 d9 d3 e0 [ 172.000686][ C1] RSP: 0018:ffffc90000e078a8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 172.009087][ C1] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff8880a9972480 [ 172.017080][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea0001ad2640 [ 172.025153][ C1] RBP: ffffc90000e078d8 R08: 000000000003a768 R09: fffffbfff120248a [ 172.033127][ C1] R10: fffffbfff120248a R11: 0000000000000000 R12: ffffea0001ad2640 [ 172.041262][ C1] R13: 1ffffd400035a4cf R14: ffffea0001ad2678 R15: ffff8880a14cd768 [ 172.049250][ C1] ? free_thread_stack+0x124/0x590 [ 172.054350][ C1] free_thread_stack+0x12e/0x590 [ 172.059278][ C1] put_task_stack+0xa3/0x130 [ 172.063854][ C1] finish_task_switch+0x3f1/0x550 [ 172.068874][ C1] __schedule+0x9a8/0xcc0 [ 172.073195][ C1] ? debug_smp_processor_id+0x9/0x20 [ 172.078469][ C1] schedule+0x181/0x210 [ 172.082614][ C1] schedule_preempt_disabled+0x13/0x20 [ 172.088065][ C1] mutex_optimistic_spin+0x445/0x480 [ 172.093347][ C1] __mutex_lock_common+0x2e7/0x2e10 [ 172.098534][ C1] ? rtnl_lock+0x17/0x20 [ 172.102777][ C1] ? process_one_work+0x75d/0x10d0 [ 172.107882][ C1] mutex_lock_nested+0x1b/0x30 [ 172.112804][ C1] rtnl_lock+0x17/0x20 [ 172.116858][ C1] addrconf_dad_work+0x69/0x1c30 [ 172.121958][ C1] ? rcu_read_lock_sched_held+0x10b/0x170 [ 172.127671][ C1] process_one_work+0x7ef/0x10d0 [ 172.132606][ C1] worker_thread+0xc01/0x1630 [ 172.137654][ C1] kthread+0x332/0x350 [ 172.141708][ C1] ? rcu_lock_release+0x30/0x30 [ 172.146542][ C1] ? kthread_blkcg+0xe0/0xe0 [ 172.151204][ C1] ret_from_fork+0x24/0x30