[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 47.795827][ T26] audit: type=1800 audit(1575366786.567:25): pid=8394 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 47.825082][ T26] audit: type=1800 audit(1575366786.567:26): pid=8394 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 47.848500][ T26] audit: type=1800 audit(1575366786.567:27): pid=8394 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 '10.128.0.253' (ECDSA) to the list of known hosts. 2019/12/03 09:53:17 fuzzer started 2019/12/03 09:53:18 dialing manager at 10.128.0.26:38907 2019/12/03 09:53:19 syscalls: 2697 2019/12/03 09:53:19 code coverage: enabled 2019/12/03 09:53:19 comparison tracing: enabled 2019/12/03 09:53:19 extra coverage: extra coverage is not supported by the kernel 2019/12/03 09:53:19 setuid sandbox: enabled 2019/12/03 09:53:19 namespace sandbox: enabled 2019/12/03 09:53:19 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 09:53:19 fault injection: enabled 2019/12/03 09:53:19 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 09:53:19 net packet injection: enabled 2019/12/03 09:53:19 net device setup: enabled 2019/12/03 09:53:19 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 09:53:19 devlink PCI setup: PCI device 0000:00:10.0 is not available 09:53:20 executing program 0: syz_open_dev$sndpcmc(&(0x7f0000000040)='/dev/snd/pcmC#D#c\x00', 0x0, 0x0) r0 = syz_open_dev$sndpcmc(0x0, 0x0, 0x0) ioctl$RTC_EPOCH_SET(r0, 0x40084146, 0x1000000000000009) 09:53:20 executing program 1: getpid() r0 = socket(0x22, 0x2, 0x4) rt_tgsigqueueinfo(0x0, 0x0, 0x0, 0x0) recvmsg$can_raw(r0, &(0x7f0000000280)={0x0, 0x0, 0x0}, 0x40000040) syzkaller login: [ 61.390533][ T8560] IPVS: ftp: loaded support on port[0] = 21 [ 61.574212][ T8560] chnl_net:caif_netlink_parms(): no params data found [ 61.576821][ T8563] IPVS: ftp: loaded support on port[0] = 21 09:53:20 executing program 2: mkdir(&(0x7f0000639000)='./file0\x00', 0x0) r0 = creat(&(0x7f0000139000)='./file0/bus\x00', 0x0) unshare(0x40600) ioctl$EXT4_IOC_SETFLAGS(r0, 0x40086602, &(0x7f0000000000)=0x20010044) [ 61.668902][ T8560] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.678755][ T8560] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.694704][ T8560] device bridge_slave_0 entered promiscuous mode [ 61.727001][ T8560] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.743794][ T8560] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.754555][ T8560] device bridge_slave_1 entered promiscuous mode [ 61.789127][ T8560] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.802664][ T8565] IPVS: ftp: loaded support on port[0] = 21 [ 61.818628][ T8560] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.874409][ T8560] team0: Port device team_slave_0 added 09:53:20 executing program 3: r0 = socket$kcm(0x2b, 0x8000000000001, 0x0) ioctl$PERF_EVENT_IOC_ENABLE(r0, 0x8912, 0x400200) r1 = socket(0x10, 0x800000000000803, 0x0) sendto(r1, &(0x7f0000000000)="120000001600e70d017b17d473fc00000000", 0x12, 0x0, 0x0, 0x0) recvmmsg(r1, &(0x7f0000001ac0)=[{{0x0, 0x363, &(0x7f00000001c0)=[{&(0x7f0000000280)=""/4079, 0xfc0}], 0x1, 0x0, 0x2}}], 0x4000000000000ee, 0x0, 0x0) [ 61.925625][ T8560] team0: Port device team_slave_1 added [ 61.999006][ T8563] chnl_net:caif_netlink_parms(): no params data found [ 62.066450][ T8560] device hsr_slave_0 entered promiscuous mode 09:53:20 executing program 4: mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x3, 0x8031, 0xffffffffffffffff, 0x0) r0 = socket$inet6_tcp(0xa, 0x1, 0x0) r1 = socket$unix(0x1, 0x1, 0x0) r2 = fcntl$dupfd(r1, 0x0, r0) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) r3 = open(&(0x7f00000000c0)='./bus\x00', 0x1030c2, 0x0) r4 = creat(&(0x7f0000000080)='./bus\x00', 0x0) ioctl$EXT4_IOC_SETFLAGS(r4, 0x40086602, &(0x7f0000000040)) write$binfmt_elf64(r4, &(0x7f0000000000)=ANY=[@ANYRESDEC], 0xfd14) mmap(&(0x7f0000001000/0xa000)=nil, 0xa000, 0x800002, 0x11, r3, 0x2000) madvise(&(0x7f0000000000/0x600000)=nil, 0x600003, 0x9) [ 62.115852][ T8560] device hsr_slave_1 entered promiscuous mode [ 62.260094][ T8563] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.267960][ T8563] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.276317][ T8563] device bridge_slave_0 entered promiscuous mode [ 62.287246][ T8568] IPVS: ftp: loaded support on port[0] = 21 [ 62.318935][ T8563] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.326666][ T8563] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.334877][ T8563] device bridge_slave_1 entered promiscuous mode [ 62.356920][ T8565] chnl_net:caif_netlink_parms(): no params data found [ 62.398201][ T8563] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.436504][ T8563] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link 09:53:21 executing program 5: unshare(0x2000400) socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000140)={0xffffffffffffffff}) r1 = dup(r0) ioctl$PERF_EVENT_IOC_ENABLE(r1, 0x8912, 0x400200) r2 = inotify_init1(0x0) fstat(r2, &(0x7f00000000c0)) [ 62.467054][ T8560] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 62.562248][ T8560] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 62.579970][ T8571] IPVS: ftp: loaded support on port[0] = 21 [ 62.626332][ T8560] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 62.705025][ T8560] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 62.756829][ T8565] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.764739][ T8565] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.772664][ T8565] device bridge_slave_0 entered promiscuous mode [ 62.783334][ T8565] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.790524][ T8565] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.798665][ T8565] device bridge_slave_1 entered promiscuous mode [ 62.808353][ T8563] team0: Port device team_slave_0 added [ 62.822700][ T8573] IPVS: ftp: loaded support on port[0] = 21 [ 62.857372][ T8563] team0: Port device team_slave_1 added [ 62.871734][ T8565] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.928594][ T8565] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 63.027032][ T8563] device hsr_slave_0 entered promiscuous mode [ 63.084251][ T8563] device hsr_slave_1 entered promiscuous mode [ 63.144803][ T8563] debugfs: Directory 'hsr0' with parent '/' already present! [ 63.161493][ T8565] team0: Port device team_slave_0 added [ 63.170505][ T8565] team0: Port device team_slave_1 added [ 63.178682][ T8568] chnl_net:caif_netlink_parms(): no params data found [ 63.326790][ T8565] device hsr_slave_0 entered promiscuous mode [ 63.364165][ T8565] device hsr_slave_1 entered promiscuous mode [ 63.405010][ T8565] debugfs: Directory 'hsr0' with parent '/' already present! [ 63.439180][ T8568] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.447321][ T8568] bridge0: port 1(bridge_slave_0) entered disabled state [ 63.456553][ T8568] device bridge_slave_0 entered promiscuous mode [ 63.494139][ T8568] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.501343][ T8568] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.510191][ T8568] device bridge_slave_1 entered promiscuous mode [ 63.533176][ T8563] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 63.577382][ T8571] chnl_net:caif_netlink_parms(): no params data found [ 63.586751][ T8563] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 63.638454][ T8565] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 63.707929][ T8565] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 63.771023][ T8568] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 63.787207][ T8563] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 63.869256][ T8565] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 63.936399][ T8568] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 63.969582][ T8563] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 64.044827][ T8565] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 64.115844][ T8560] 8021q: adding VLAN 0 to HW filter on device bond0 [ 64.130792][ T8571] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.141200][ T8571] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.149904][ T8571] device bridge_slave_0 entered promiscuous mode [ 64.160022][ T8571] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.167870][ T8571] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.176074][ T8571] device bridge_slave_1 entered promiscuous mode [ 64.198163][ T8568] team0: Port device team_slave_0 added [ 64.207215][ T8568] team0: Port device team_slave_1 added [ 64.223239][ T8571] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 64.237709][ T8571] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 64.248155][ T8573] chnl_net:caif_netlink_parms(): no params data found [ 64.309011][ T8560] 8021q: adding VLAN 0 to HW filter on device team0 [ 64.318331][ T8571] team0: Port device team_slave_0 added [ 64.327514][ T8571] team0: Port device team_slave_1 added [ 64.351683][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 64.361128][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 64.388229][ T8573] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.397384][ T8573] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.405612][ T8573] device bridge_slave_0 entered promiscuous mode [ 64.457151][ T8568] device hsr_slave_0 entered promiscuous mode [ 64.504388][ T8568] device hsr_slave_1 entered promiscuous mode [ 64.533975][ T8568] debugfs: Directory 'hsr0' with parent '/' already present! [ 64.551211][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 64.561439][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 64.570793][ T2922] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.578421][ T2922] bridge0: port 1(bridge_slave_0) entered forwarding state [ 64.588009][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 64.596890][ T8573] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.605269][ T8573] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.613382][ T8573] device bridge_slave_1 entered promiscuous mode [ 64.676844][ T8571] device hsr_slave_0 entered promiscuous mode [ 64.714391][ T8571] device hsr_slave_1 entered promiscuous mode [ 64.753851][ T8571] debugfs: Directory 'hsr0' with parent '/' already present! [ 64.782527][ T8573] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 64.800275][ T8573] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 64.813337][ T2705] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 64.824969][ T2705] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 64.834220][ T2705] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.841293][ T2705] bridge0: port 2(bridge_slave_1) entered forwarding state [ 64.849168][ T2705] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 64.858677][ T2705] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 64.910302][ T8573] team0: Port device team_slave_0 added [ 64.922848][ T8573] team0: Port device team_slave_1 added [ 64.940437][ T8568] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 65.019633][ T8568] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 65.116238][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 65.124899][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 65.133897][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 65.142480][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 65.152796][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 65.161046][ T8568] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 65.226860][ T8571] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 65.315993][ T8573] device hsr_slave_0 entered promiscuous mode [ 65.345687][ T8573] device hsr_slave_1 entered promiscuous mode [ 65.394500][ T8573] debugfs: Directory 'hsr0' with parent '/' already present! [ 65.411712][ T8568] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 65.467503][ T8571] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 65.515912][ T8571] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 65.569179][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 65.578107][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 65.587552][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 65.596268][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 65.606129][ T8560] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 65.637207][ T8571] netdevsim netdevsim4 netdevsim3: renamed from eth3 [ 65.709823][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 65.717701][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 65.730924][ T8560] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 65.744174][ T8573] netdevsim netdevsim5 netdevsim0: renamed from eth0 [ 65.786451][ T8573] netdevsim netdevsim5 netdevsim1: renamed from eth1 [ 65.825795][ T8573] netdevsim netdevsim5 netdevsim2: renamed from eth2 [ 65.868949][ T8573] netdevsim netdevsim5 netdevsim3: renamed from eth3 [ 65.948125][ T8565] 8021q: adding VLAN 0 to HW filter on device bond0 [ 65.988264][ T8563] 8021q: adding VLAN 0 to HW filter on device bond0 [ 66.018325][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 66.026993][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 66.051950][ T8565] 8021q: adding VLAN 0 to HW filter on device team0 [ 66.088907][ T8563] 8021q: adding VLAN 0 to HW filter on device team0 [ 171.133635][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 171.140632][ C0] (detected by 0, t=10502 jiffies, g=7321, q=109) [ 171.147122][ C0] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294954245-4294943742), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 171.160576][ C0] udevd R running task 28104 8531 4089 0x0000400a [ 171.168593][ C0] Call Trace: [ 171.171895][ C0] [ 171.174893][ C0] sched_show_task+0x40f/0x560 [ 171.179698][ C0] rcu_sched_clock_irq+0x1861/0x1ad0 [ 171.185011][ C0] update_process_times+0x12d/0x180 [ 171.190339][ C0] tick_sched_timer+0x263/0x420 [ 171.195179][ C0] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 171.200846][ C0] __hrtimer_run_queues+0x403/0x840 [ 171.206220][ C0] hrtimer_interrupt+0x38c/0xda0 [ 171.211167][ C0] ? debug_smp_processor_id+0x9/0x20 [ 171.216459][ C0] smp_apic_timer_interrupt+0x109/0x280 [ 171.222641][ C0] apic_timer_interrupt+0xf/0x20 [ 171.227565][ C0] [ 171.230515][ C0] RIP: 0010:free_thread_stack+0x14c/0x590 [ 171.236226][ C0] Code: 2e 00 48 89 df 31 f6 e8 42 af 6e 00 43 80 3c 2e 00 74 08 4c 89 e7 e8 43 a4 69 00 49 8b 1c 24 48 83 c3 08 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 25 a4 69 00 48 8b 3b be fc ff ff [ 171.256170][ C0] RSP: 0018:ffffc90001d37958 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 [ 171.264659][ C0] RAX: 1ffff1101216bc61 RBX: ffff888090b5e308 RCX: 0000000000000000 [ 171.272726][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea000281fc00 [ 171.280686][ C0] RBP: ffffc90001d37990 R08: dffffc0000000000 R09: fffffbfff120248a [ 171.288662][ C0] R10: fffffbfff120248a R11: 0000000000000000 R12: ffff888090b5e3a0 [ 171.296636][ C0] R13: dffffc0000000000 R14: 1ffff1101216bc74 R15: ffff8880a88e55a8 [ 171.304639][ C0] ? free_thread_stack+0x12e/0x590 [ 171.310216][ C0] put_task_stack+0xa3/0x130 [ 171.314993][ C0] finish_task_switch+0x3f1/0x550 [ 171.320017][ C0] __schedule+0x9a8/0xcc0 [ 171.324349][ C0] ? ___preempt_schedule+0x16/0x18 [ 171.330247][ C0] preempt_schedule+0xdb/0x120 [ 171.335096][ C0] ___preempt_schedule+0x16/0x18 [ 171.340213][ C0] ? __wake_up_sync_key+0xe2/0x150 [ 171.345325][ C0] _raw_spin_unlock_irqrestore+0xcc/0xe0 [ 171.350959][ C0] __wake_up_sync_key+0xe2/0x150 [ 171.355898][ C0] sock_def_readable+0x162/0x200 [ 171.360853][ C0] unix_dgram_sendmsg+0x1bd5/0x2690 [ 171.366083][ C0] ? __sys_sendmsg+0x20b/0x290 [ 171.370885][ C0] ? unix_dgram_poll+0x6b0/0x6b0 [ 171.375915][ C0] __sys_sendto+0x442/0x5e0 [ 171.380420][ C0] ? debug_smp_processor_id+0x1c/0x20 [ 171.385827][ C0] ? fpregs_assert_state_consistent+0xb6/0xe0 [ 171.391890][ C0] ? prepare_exit_to_usermode+0x221/0x5b0 [ 171.397693][ C0] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 171.403415][ C0] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 171.409219][ C0] __x64_sys_sendto+0xe5/0x100 [ 171.413990][ C0] do_syscall_64+0xf7/0x1c0 [ 171.418661][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 171.424567][ C0] RIP: 0033:0x7f26902a1282 [ 171.429255][ C0] Code: 48 83 c8 ff eb ea 90 90 53 48 83 ec 20 8b 05 81 d3 2a 00 85 c0 75 21 45 31 c9 45 31 c0 4c 63 d1 48 63 ff b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 61 48 83 c4 20 5b c3 48 89 54 24 08 89 0c 24 [ 171.449121][ C0] RSP: 002b:00007fff1f65a0e0 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 171.457525][ C0] RAX: ffffffffffffffda RBX: 00000000019a6e80 RCX: 00007f26902a1282 [ 171.465509][ C0] RDX: 0000000000000008 RSI: 00007fff1f65a130 RDI: 0000000000000009 [ 171.473548][ C0] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 171.481532][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 171.489533][ C0] R13: 000000000198fd60 R14: 000000000198e250 R15: 000000000000000b [ 171.497522][ C0] rcu: rcu_preempt kthread starved for 10538 jiffies! g7321 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 171.508797][ C0] rcu: RCU grace-period kthread stack dump: [ 171.514688][ C0] rcu_preempt R running task 29032 10 2 0x80004000 [ 171.522586][ C0] Call Trace: [ 171.525874][ C0] __schedule+0x9a0/0xcc0 [ 171.530212][ C0] schedule+0x181/0x210 [ 171.534377][ C0] schedule_timeout+0x14f/0x240 [ 171.539563][ C0] ? run_local_timers+0x120/0x120 [ 171.544592][ C0] rcu_gp_kthread+0xed8/0x1770 [ 171.549357][ C0] kthread+0x332/0x350 [ 171.553609][ C0] ? rcu_report_qs_rsp+0x140/0x140 [ 171.558732][ C0] ? kthread_blkcg+0xe0/0xe0 [ 171.563319][ C0] ret_from_fork+0x24/0x30