[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 44.738515][ T23] audit: type=1800 audit(1575436391.772:25): pid=8112 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 44.758426][ T23] audit: type=1800 audit(1575436391.772:26): pid=8112 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 44.806137][ T23] audit: type=1800 audit(1575436391.772:27): pid=8112 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 '10.128.0.205' (ECDSA) to the list of known hosts. 2019/12/04 05:13:20 fuzzer started 2019/12/04 05:13:22 dialing manager at 10.128.0.26:42111 2019/12/04 05:13:22 syscalls: 2689 2019/12/04 05:13:22 code coverage: enabled 2019/12/04 05:13:22 comparison tracing: enabled 2019/12/04 05:13:22 extra coverage: extra coverage is not supported by the kernel 2019/12/04 05:13:22 setuid sandbox: enabled 2019/12/04 05:13:22 namespace sandbox: enabled 2019/12/04 05:13:22 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/04 05:13:22 fault injection: enabled 2019/12/04 05:13:22 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/04 05:13:22 net packet injection: enabled 2019/12/04 05:13:22 net device setup: enabled 2019/12/04 05:13:22 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/04 05:13:22 devlink PCI setup: PCI device 0000:00:10.0 is not available 05:13:23 executing program 0: r0 = syz_open_dev$dri(&(0x7f0000000000)='/dev/dri/card#\x00', 0x0, 0x0) r1 = openat$ion(0xffffffffffffff9c, &(0x7f0000000140)='/dev/ion\x00', 0x0, 0x0) ioctl$ION_IOC_ALLOC(r1, 0xc0184900, &(0x7f0000000040)={0xa925, 0x1, 0x0, 0xffffffffffffffff}) r3 = dup(r2) ioctl$DRM_IOCTL_PRIME_FD_TO_HANDLE(r0, 0xc00c642e, &(0x7f00000000c0)={0x0, 0x0, r3}) ioctl$DRM_IOCTL_PRIME_HANDLE_TO_FD(r0, 0xc10c5541, &(0x7f0000000200)={r4}) ioctl$SNDRV_RAWMIDI_IOCTL_DRAIN(r3, 0x40045731, 0x0) 05:13:23 executing program 1: socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000000180)={0xffffffffffffffff}) r1 = dup(r0) ioctl$PERF_EVENT_IOC_ENABLE(r1, 0x8912, 0x400200) prctl$PR_SET_PDEATHSIG(0x1, 0x41) syzkaller login: [ 56.675669][ T8278] IPVS: ftp: loaded support on port[0] = 21 [ 56.795566][ T8278] chnl_net:caif_netlink_parms(): no params data found [ 56.871524][ T8278] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.890013][ T8278] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.898055][ T8278] device bridge_slave_0 entered promiscuous mode [ 56.913066][ T8281] IPVS: ftp: loaded support on port[0] = 21 05:13:24 executing program 2: lstat(&(0x7f0000000080)='.\x00', &(0x7f0000000100)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0}) setresgid(r0, r0, 0x0) r1 = socket$netlink(0x10, 0x3, 0x0) sendmsg$netlink(r1, &(0x7f00000016c0)={0x0, 0x0, 0x0, 0x0, &(0x7f0000000140)=[@cred={{0x1c, 0x1, 0x2, {0x0, 0xee00}}}], 0x20}, 0x0) [ 56.919897][ T8278] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.927042][ T8278] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.939963][ T8278] device bridge_slave_1 entered promiscuous mode [ 56.990704][ T8278] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.013261][ T8278] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.091072][ T8278] team0: Port device team_slave_0 added [ 57.110262][ T8278] team0: Port device team_slave_1 added 05:13:24 executing program 3: mkdir(&(0x7f0000000100)='./file0\x00', 0x0) mount$9p_rdma(&(0x7f0000000080)='127.0.0\n1\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000140)='9p\x00', 0x0, &(0x7f0000000340)={'trans=rdma,', {'port'}}) [ 57.177237][ T8281] chnl_net:caif_netlink_parms(): no params data found [ 57.251552][ T8278] device hsr_slave_0 entered promiscuous mode 05:13:24 executing program 4: r0 = openat$uinput(0xffffffffffffff9c, &(0x7f00000003c0)='/dev/uinput\x00', 0x822, 0x0) write$uinput_user_dev(r0, &(0x7f0000000640)={'syz1\x00'}, 0x45c) ioctl$UI_DEV_CREATE(r0, 0x5501) write$uinput_user_dev(r0, &(0x7f0000000ac0)={'syz1\x00', {}, 0x0, [], [0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x10000]}, 0x45c) readv(r0, &(0x7f0000000540)=[{&(0x7f0000000f40)=""/4096, 0x18}, {&(0x7f0000000100)=""/194, 0x18}, {&(0x7f0000000000)=""/3}, {&(0x7f0000000040)=""/39}, {&(0x7f0000000080)=""/41}, {&(0x7f0000000200)=""/218}, {&(0x7f0000000480)=""/169}], 0x339) [ 57.389449][ T8278] device hsr_slave_1 entered promiscuous mode [ 57.474134][ T8284] IPVS: ftp: loaded support on port[0] = 21 [ 57.491462][ T8286] IPVS: ftp: loaded support on port[0] = 21 05:13:24 executing program 5: socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) r1 = dup(r0) ioctl$PERF_EVENT_IOC_ENABLE(r1, 0x8912, 0x400200) unshare(0x40600) r2 = socket(0x10, 0x803, 0x0) getpeername$inet6(r2, &(0x7f0000000340)={0xa, 0x0, 0x0, @dev}, &(0x7f0000000300)=0xfffffffffffffeaa) [ 57.564411][ T8281] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.580429][ T8281] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.600939][ T8281] device bridge_slave_0 entered promiscuous mode [ 57.622375][ T8281] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.633932][ T8281] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.650042][ T8281] device bridge_slave_1 entered promiscuous mode [ 57.662094][ T8278] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 57.732688][ T8278] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 57.781887][ T8278] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 57.850819][ T8278] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 57.921084][ T8281] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.921896][ T8289] IPVS: ftp: loaded support on port[0] = 21 [ 57.936359][ T8281] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.962151][ T8290] IPVS: ftp: loaded support on port[0] = 21 [ 58.017277][ T8281] team0: Port device team_slave_0 added [ 58.025224][ T8281] team0: Port device team_slave_1 added [ 58.100619][ T8281] device hsr_slave_0 entered promiscuous mode [ 58.149168][ T8281] device hsr_slave_1 entered promiscuous mode [ 58.198835][ T8281] debugfs: Directory 'hsr0' with parent '/' already present! [ 58.318533][ T8278] 8021q: adding VLAN 0 to HW filter on device bond0 [ 58.337498][ T8284] chnl_net:caif_netlink_parms(): no params data found [ 58.360135][ T8286] chnl_net:caif_netlink_parms(): no params data found [ 58.393371][ T8289] chnl_net:caif_netlink_parms(): no params data found [ 58.436706][ T8290] chnl_net:caif_netlink_parms(): no params data found [ 58.451854][ T8281] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 58.515467][ T8281] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 58.550711][ T8286] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.557872][ T8286] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.565760][ T8286] device bridge_slave_0 entered promiscuous mode [ 58.576214][ T8286] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.584061][ T8286] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.592168][ T8286] device bridge_slave_1 entered promiscuous mode [ 58.601647][ T8278] 8021q: adding VLAN 0 to HW filter on device team0 [ 58.612910][ T3013] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 58.621113][ T3013] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.631182][ T8284] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.638222][ T8284] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.645828][ T8284] device bridge_slave_0 entered promiscuous mode [ 58.653937][ T8281] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 58.718210][ T8281] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 58.762390][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 58.771629][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 58.780102][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.787199][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 58.808899][ T8284] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.815988][ T8284] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.824588][ T8284] device bridge_slave_1 entered promiscuous mode [ 58.858164][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 58.868182][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 58.877323][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 58.885820][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.892929][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.901628][ T8290] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.909462][ T8290] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.917055][ T8290] device bridge_slave_0 entered promiscuous mode [ 58.925235][ T8290] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.932374][ T8290] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.940289][ T8290] device bridge_slave_1 entered promiscuous mode [ 58.949068][ T8286] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.968662][ T8290] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.979932][ T8284] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.990895][ T8284] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.001061][ T8289] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.008180][ T8289] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.015947][ T8289] device bridge_slave_0 entered promiscuous mode [ 59.024929][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 59.035158][ T8286] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.049858][ T3238] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 59.062727][ T8290] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.072246][ T8289] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.079711][ T8289] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.087264][ T8289] device bridge_slave_1 entered promiscuous mode [ 59.129598][ T8290] team0: Port device team_slave_0 added [ 59.135441][ T3013] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 59.145090][ T3013] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 59.154268][ T3013] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 59.169761][ T8284] team0: Port device team_slave_0 added [ 59.177190][ T8286] team0: Port device team_slave_0 added [ 59.184711][ T8286] team0: Port device team_slave_1 added [ 59.192141][ T8290] team0: Port device team_slave_1 added [ 59.200275][ T8289] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.211609][ T8289] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.222059][ T8284] team0: Port device team_slave_1 added [ 59.290560][ T8286] device hsr_slave_0 entered promiscuous mode [ 59.339091][ T8286] device hsr_slave_1 entered promiscuous mode [ 59.378903][ T8286] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.390087][ T8291] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 59.398733][ T8291] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 59.450628][ T8290] device hsr_slave_0 entered promiscuous mode [ 59.499084][ T8290] device hsr_slave_1 entered promiscuous mode [ 59.548913][ T8290] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.573091][ T8278] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 59.583768][ T8278] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 59.597258][ T8291] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 59.605863][ T8291] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 59.614456][ T8291] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 59.622632][ T8291] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 59.631079][ T8291] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 59.654061][ T8289] team0: Port device team_slave_0 added [ 59.669088][ T8281] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.730611][ T8284] device hsr_slave_0 entered promiscuous mode [ 59.779061][ T8284] device hsr_slave_1 entered promiscuous mode [ 59.818891][ T8284] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.827678][ T8289] team0: Port device team_slave_1 added [ 59.871622][ T8281] 8021q: adding VLAN 0 to HW filter on device team0 [ 59.885392][ T8291] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 59.892852][ T8291] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 59.900643][ T8291] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 59.908295][ T8291] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 59.940375][ T8289] device hsr_slave_0 entered promiscuous mode [ 59.979038][ T8289] device hsr_slave_1 entered promiscuous mode [ 60.028840][ T8289] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.040465][ T8278] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 60.074922][ T8284] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 60.120974][ T8284] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 60.160135][ T8290] netdevsim netdevsim5 netdevsim0: renamed from eth0 [ 60.225595][ T8284] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 60.272068][ T8284] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 60.331441][ T8290] netdevsim netdevsim5 netdevsim1: renamed from eth1 [ 60.371679][ T3692] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 60.380459][ T3692] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 60.388775][ T3692] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.395814][ T3692] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.403560][ T8286] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 60.465337][ T8289] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 60.521309][ T8289] netdevsim netdevsim4 netdevsim1: renamed from eth1 [ 60.566831][ T8289] netdevsim netdevsim4 netdevsim2: renamed from eth2 [ 60.608857][ T8290] netdevsim netdevsim5 netdevsim2: renamed from eth2 [ 165.628673][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 165.635702][ C0] (detected by 0, t=10502 jiffies, g=6237, q=104) [ 165.642192][ C0] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294953717-4294943214), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 165.655972][ C0] ion_system_heap R running task 28712 3666 2 0x80004008 [ 165.664117][ C0] Call Trace: [ 165.667387][ C0] [ 165.670230][ C0] sched_show_task+0x40f/0x560 [ 165.674984][ C0] rcu_sched_clock_irq+0x1861/0x1ad0 [ 165.680259][ C0] update_process_times+0x12d/0x180 [ 165.685443][ C0] tick_sched_timer+0x263/0x420 [ 165.690281][ C0] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 165.695810][ C0] __hrtimer_run_queues+0x403/0x840 [ 165.701010][ C0] hrtimer_interrupt+0x38c/0xda0 [ 165.705945][ C0] ? debug_smp_processor_id+0x9/0x20 [ 165.711217][ C0] smp_apic_timer_interrupt+0x109/0x280 [ 165.716748][ C0] apic_timer_interrupt+0xf/0x20 [ 165.721666][ C0] [ 165.724591][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x14/0x50 [ 165.730730][ C0] Code: 00 00 00 48 8b 3d 74 25 cd 07 48 89 de e8 64 02 3b 00 5b 5d c3 cc 48 8b 04 24 65 48 8b 0c 25 c0 1d 02 00 65 8b 15 b8 81 8b 7e c2 00 01 1f 00 75 2c 8b 91 80 13 00 00 83 fa 02 75 21 48 8b 91 [ 165.750406][ C0] RSP: 0018:ffffc9000c647968 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 165.758798][ C0] RAX: ffffffff81487326 RBX: ffffea00024e1900 RCX: ffff88809ae44580 [ 165.766755][ C0] RDX: 0000000000000001 RSI: 00000000fffffffc RDI: ffffea00024e1900 [ 165.774711][ C0] RBP: ffffc9000c647990 R08: dffffc0000000000 R09: fffffbfff120248a [ 165.782666][ C0] R10: fffffbfff120248a R11: 0000000000000000 R12: ffff8880a7d3b820 [ 165.790623][ C0] R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff88808a6055a8 [ 165.798593][ C0] ? mod_memcg_page_state+0x16/0x190 [ 165.803870][ C0] ? free_thread_stack+0x124/0x590 [ 165.808962][ C0] ? mod_memcg_page_state+0x16/0x190 [ 165.814243][ C0] free_thread_stack+0x168/0x590 [ 165.819168][ C0] put_task_stack+0xa3/0x130 [ 165.823744][ C0] finish_task_switch+0x3f1/0x550 [ 165.828772][ C0] __schedule+0x9a8/0xcc0 [ 165.833105][ C0] ? ___preempt_schedule+0x16/0x18 [ 165.838200][ C0] preempt_schedule+0xdb/0x120 [ 165.842948][ C0] ___preempt_schedule+0x16/0x18 [ 165.847883][ C0] ? vm_map_ram+0x824/0x2420 [ 165.852467][ C0] ? vm_map_ram+0xb5c/0x2420 [ 165.857042][ C0] vm_map_ram+0xb61/0x2420 [ 165.861454][ C0] ? __sg_page_iter_next+0x306/0x370 [ 165.866727][ C0] ion_heap_sglist_zero+0x208/0x280 [ 165.871924][ C0] ? finish_wait+0x1a2/0x1c0 [ 165.876499][ C0] ? ion_heap_deferred_free+0x6b/0x4c0 [ 165.881945][ C0] ion_heap_buffer_zero+0xed/0x110 [ 165.887040][ C0] ion_system_heap_free+0xa9/0x3c0 [ 165.892141][ C0] ion_buffer_destroy+0x116/0x210 [ 165.897148][ C0] ion_heap_deferred_free+0x73/0x4c0 [ 165.902418][ C0] ? init_wait_entry+0xe0/0xe0 [ 165.907169][ C0] kthread+0x332/0x350 [ 165.911219][ C0] ? ion_heap_init_deferred_free+0x1d0/0x1d0 [ 165.917182][ C0] ? kthread_blkcg+0xe0/0xe0 [ 165.921757][ C0] ret_from_fork+0x24/0x30 [ 165.926175][ C0] rcu: rcu_preempt kthread starved for 10531 jiffies! g6237 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 165.937255][ C0] rcu: RCU grace-period kthread stack dump: [ 165.943127][ C0] rcu_preempt R running task 29032 10 2 0x80004000 [ 165.952309][ C0] Call Trace: [ 165.955585][ C0] __schedule+0x9a0/0xcc0 [ 165.959911][ C0] schedule+0x181/0x210 [ 165.964748][ C0] schedule_timeout+0x14f/0x240 [ 165.969583][ C0] ? run_local_timers+0x120/0x120 [ 165.974604][ C0] rcu_gp_kthread+0xed8/0x1770 [ 165.979363][ C0] kthread+0x332/0x350 [ 165.983413][ C0] ? rcu_report_qs_rsp+0x140/0x140 [ 165.988507][ C0] ? kthread_blkcg+0xe0/0xe0 [ 165.993081][ C0] ret_from_fork+0x24/0x30