[ 41.501745][ T23] audit: type=1800 audit(1575364412.567:27): pid=7929 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 41.521251][ T23] audit: type=1800 audit(1575364412.567:28): pid=7929 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. [ 42.318664][ T23] audit: type=1800 audit(1575364413.457:29): pid=7929 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 42.338434][ T23] audit: type=1800 audit(1575364413.457:30): pid=7929 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 '10.128.0.244' (ECDSA) to the list of known hosts. 2019/12/03 09:13:43 fuzzer started 2019/12/03 09:13:45 dialing manager at 10.128.0.26:38907 2019/12/03 09:13:45 syscalls: 2697 2019/12/03 09:13:45 code coverage: enabled 2019/12/03 09:13:45 comparison tracing: enabled 2019/12/03 09:13:45 extra coverage: extra coverage is not supported by the kernel 2019/12/03 09:13:45 setuid sandbox: enabled 2019/12/03 09:13:45 namespace sandbox: enabled 2019/12/03 09:13:45 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 09:13:45 fault injection: enabled 2019/12/03 09:13:45 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 09:13:45 net packet injection: enabled 2019/12/03 09:13:45 net device setup: enabled 2019/12/03 09:13:45 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 09:13:45 devlink PCI setup: PCI device 0000:00:10.0 is not available 09:13:46 executing program 0: select(0x1, &(0x7f0000000080), &(0x7f0000000100)={0x5}, &(0x7f0000000140), &(0x7f0000000240)) 09:13:46 executing program 1: r0 = socket$alg(0x26, 0x5, 0x0) bind$alg(r0, &(0x7f0000000040)={0x26, 'hash\x00', 0x0, 0x0, 'poly1305-generic\x00'}, 0x58) r1 = accept$alg(r0, 0x0, 0x0) r2 = open(&(0x7f00004b8ff8)='./file0\x00', 0x68042, 0x0) fallocate(r2, 0x0, 0x0, 0x40007) sendfile(r1, r2, 0x0, 0x400) syzkaller login: [ 55.455129][ T8095] IPVS: ftp: loaded support on port[0] = 21 [ 55.595631][ T8095] chnl_net:caif_netlink_parms(): no params data found [ 55.634787][ T8095] bridge0: port 1(bridge_slave_0) entered blocking state [ 55.643131][ T8095] bridge0: port 1(bridge_slave_0) entered disabled state [ 55.651253][ T8095] device bridge_slave_0 entered promiscuous mode [ 55.659803][ T8095] bridge0: port 2(bridge_slave_1) entered blocking state [ 55.667285][ T8095] bridge0: port 2(bridge_slave_1) entered disabled state [ 55.675089][ T8095] device bridge_slave_1 entered promiscuous mode [ 55.695171][ T8095] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 55.706819][ T8095] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 55.730156][ T8095] team0: Port device team_slave_0 added [ 55.737571][ T8095] team0: Port device team_slave_1 added 09:13:46 executing program 2: r0 = socket$inet6(0xa, 0x1, 0x8010000000000084) getsockopt$sock_buf(r0, 0x1, 0x1c, 0x0, &(0x7f00000012c0)) [ 55.739099][ T8098] IPVS: ftp: loaded support on port[0] = 21 [ 55.799587][ T8095] device hsr_slave_0 entered promiscuous mode [ 55.858219][ T8095] device hsr_slave_1 entered promiscuous mode 09:13:47 executing program 3: rt_sigprocmask(0x0, &(0x7f0000057ff8)={0xfffffffffffffffe}, 0x0, 0x8) setrlimit(0x1, &(0x7f0000000140)) socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}) r1 = dup(r0) ioctl$PERF_EVENT_IOC_ENABLE(r1, 0x8912, 0x400200) io_setup(0x3, &(0x7f0000000080)=0x0) r3 = memfd_create(&(0x7f00000003c0)='+\x8b\x8a\x16\x11O\xdd\xdfk(F\x99\xdf\x92\xd5>oJ\x02u\x9b\x94a\xac', 0x0) io_submit(r2, 0x26b, &(0x7f0000000340)=[&(0x7f0000000300)={0x0, 0x0, 0x0, 0x1, 0x0, r3, &(0x7f0000000280)="04", 0x1}]) [ 55.934729][ T8100] IPVS: ftp: loaded support on port[0] = 21 [ 55.964591][ T8095] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 56.041348][ T8095] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 56.121193][ T8095] netdevsim netdevsim0 netdevsim2: renamed from eth2 09:13:47 executing program 4: r0 = socket$nl_route(0x10, 0x3, 0x0) r1 = socket$packet(0x11, 0x3, 0x300) r2 = socket$nl_route(0x10, 0x3, 0x0) r3 = socket$netlink(0x10, 0x3, 0x0) r4 = socket(0x10, 0x803, 0x0) sendmsg$NBD_CMD_DISCONNECT(r4, &(0x7f00000001c0)={0x0, 0x0, &(0x7f0000000180)={0x0}}, 0x0) getsockname$packet(r4, &(0x7f0000000100)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000200)=0x14) sendmsg$nl_route(r3, &(0x7f0000000280)={0x0, 0x0, &(0x7f0000000000)={&(0x7f0000000080)=@newlink={0x48, 0x10, 0x705, 0x0, 0x0, {0x0, 0x0, 0x0, r5}, [@IFLA_LINKINFO={0x28, 0x12, @veth={{0xc, 0x1, 'veth\x00'}, {0x18, 0x2, @VETH_INFO_PEER={0x14}}}}]}, 0x48}}, 0x0) sendmsg$nl_route_sched(r2, &(0x7f0000000240)={0x0, 0x0, &(0x7f0000000140)={&(0x7f00000003c0)=ANY=[@ANYBLOB="38000000240007050000000000a2a30005000000", @ANYRES32=r5, @ANYBLOB="00000000ffffffff000000000900010068667363000000000800020000000000"], 0x38}}, 0x0) sendmsg$nl_route_sched(r3, &(0x7f0000000300)={0x0, 0x0, &(0x7f00000002c0)={&(0x7f0000000480)=ANY=[@ANYBLOB="500000002800210400"/20, @ANYRES32=r5, @ANYBLOB="ac0c000000000000000000000c0080eb8600000075700000200002001c0002000000000000000800010062706600040002000400060000ff156569735843de8b4c1ef779b8d8f7bf7afb33e23753792aafde2698ebe5f83bc5b1d2c1df41944400193870e465324b63063fc06b6d0e583c75ba0a6d8da2ca131e39aeef0f"], 0x50}}, 0x0) getsockname$packet(r1, &(0x7f0000000100)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000200)) sendmsg$nl_route(r0, &(0x7f0000000b00)={0x0, 0xfffffffffffffe32, &(0x7f0000000280)={&(0x7f0000000500)=@newlink={0x20, 0x11, 0x40d, 0x0, 0x0, {0x0, 0x0, 0x0, r6}}, 0x20}}, 0x0) [ 56.237867][ T8095] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 56.315743][ T8102] IPVS: ftp: loaded support on port[0] = 21 [ 56.333117][ T8104] IPVS: ftp: loaded support on port[0] = 21 [ 56.353584][ T8095] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.360730][ T8095] bridge0: port 2(bridge_slave_1) entered forwarding state [ 56.368442][ T8095] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.375476][ T8095] bridge0: port 1(bridge_slave_0) entered forwarding state 09:13:47 executing program 5: perf_event_open(&(0x7f0000000040)={0x2, 0x70, 0x1f, 0x1, 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, @perf_config_ext}, 0x0, 0x0, 0xffffffffffffffff, 0x0) r0 = socket$inet6_tcp(0xa, 0x1, 0x0) setsockopt$inet6_IPV6_ADDRFORM(r0, 0x29, 0x1, &(0x7f0000000140), 0x4) [ 56.476580][ T8098] chnl_net:caif_netlink_parms(): no params data found [ 56.639877][ T8100] chnl_net:caif_netlink_parms(): no params data found [ 56.653586][ T8098] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.660738][ T8098] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.668459][ T8098] device bridge_slave_0 entered promiscuous mode [ 56.677132][ T8098] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.684188][ T8098] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.693068][ T8098] device bridge_slave_1 entered promiscuous mode [ 56.701220][ T8105] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.709208][ T8105] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.762416][ T8095] 8021q: adding VLAN 0 to HW filter on device bond0 [ 56.775450][ T8109] IPVS: ftp: loaded support on port[0] = 21 [ 56.777290][ T8095] 8021q: adding VLAN 0 to HW filter on device team0 [ 56.804594][ T8105] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 56.812846][ T8105] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 56.841223][ T8100] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.848668][ T8100] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.856145][ T8100] device bridge_slave_0 entered promiscuous mode [ 56.864368][ T8098] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 56.874210][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 56.882641][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 56.890991][ T44] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.898068][ T44] bridge0: port 1(bridge_slave_0) entered forwarding state [ 56.905485][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 56.914035][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 56.922276][ T44] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.929343][ T44] bridge0: port 2(bridge_slave_1) entered forwarding state [ 56.936749][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 56.952818][ T8095] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 56.963747][ T8095] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 56.974991][ T8102] chnl_net:caif_netlink_parms(): no params data found [ 57.004919][ T8100] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.012084][ T8100] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.019931][ T8100] device bridge_slave_1 entered promiscuous mode [ 57.028420][ T8098] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.040034][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 57.048900][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 57.059068][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 57.067999][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 57.076273][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 57.086624][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 57.094992][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 57.103887][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 57.112147][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 57.120701][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 57.128607][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 57.172204][ T8104] chnl_net:caif_netlink_parms(): no params data found [ 57.202805][ T8100] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.244566][ T8098] team0: Port device team_slave_0 added [ 57.252197][ T8098] team0: Port device team_slave_1 added [ 57.263429][ T8100] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.273115][ T8104] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.280692][ T8104] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.288718][ T8104] device bridge_slave_0 entered promiscuous mode [ 57.295682][ T8102] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.305508][ T8102] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.313125][ T8102] device bridge_slave_0 entered promiscuous mode [ 57.320910][ T8102] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.328564][ T8102] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.335989][ T8102] device bridge_slave_1 entered promiscuous mode [ 57.362310][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 57.369868][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 57.380579][ T8095] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 57.392204][ T8104] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.402062][ T8104] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.409698][ T8104] device bridge_slave_1 entered promiscuous mode [ 57.426483][ T8109] chnl_net:caif_netlink_parms(): no params data found [ 57.452072][ T8100] team0: Port device team_slave_0 added [ 57.469457][ T8102] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.518916][ T8098] device hsr_slave_0 entered promiscuous mode [ 57.577871][ T8098] device hsr_slave_1 entered promiscuous mode [ 57.617155][ T8098] debugfs: Directory 'hsr0' with parent '/' already present! [ 57.625696][ T8100] team0: Port device team_slave_1 added [ 57.633649][ T8104] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.646091][ T8104] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.662358][ T8102] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.689745][ T8102] team0: Port device team_slave_0 added [ 57.697766][ T8102] team0: Port device team_slave_1 added [ 57.721455][ T8104] team0: Port device team_slave_0 added [ 57.778489][ T8100] device hsr_slave_0 entered promiscuous mode [ 57.827200][ T8100] device hsr_slave_1 entered promiscuous mode [ 57.867001][ T8100] debugfs: Directory 'hsr0' with parent '/' already present! [ 57.875434][ T8104] team0: Port device team_slave_1 added [ 57.881872][ T8109] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.889651][ T8109] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.904580][ T8109] device bridge_slave_0 entered promiscuous mode [ 162.926875][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 162.933873][ C1] (detected by 1, t=10502 jiffies, g=5761, q=61) [ 162.940282][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294953445-4294942942), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 162.953623][ C1] syz-executor.5 R running task 24584 8109 8107 0x0000400a [ 162.961512][ C1] Call Trace: [ 162.964779][ C1] [ 162.967626][ C1] sched_show_task+0x40f/0x560 [ 162.972384][ C1] rcu_sched_clock_irq+0x1861/0x1ad0 [ 162.977669][ C1] update_process_times+0x12d/0x180 [ 162.982858][ C1] tick_sched_timer+0x263/0x420 [ 162.987696][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 162.993225][ C1] __hrtimer_run_queues+0x403/0x840 [ 162.998420][ C1] hrtimer_interrupt+0x38c/0xda0 [ 163.003361][ C1] ? debug_smp_processor_id+0x9/0x20 [ 163.008632][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 163.014174][ C1] apic_timer_interrupt+0xf/0x20 [ 163.019092][ C1] [ 163.022016][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 [ 163.028152][ C1] Code: 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 f7 c2 00 01 1f 00 75 2c 8b 91 80 13 00 00 <83> fa 02 75 21 48 8b 91 88 13 00 00 48 8b 32 48 8d 7e 01 8b 89 84 [ 163.047736][ C1] RSP: 0018:ffffc900025874f0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 163.056127][ C1] RAX: ffffffff81487326 RBX: ffffea000248f1c0 RCX: ffff8880989e05c0 [ 163.064082][ C1] RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea000248f1c0 [ 163.072036][ C1] RBP: ffffc90002587518 R08: 000000000003a768 R09: ffffed1012c1ca9f [ 163.079990][ C1] R10: ffffed1012c1ca9f R11: 0000000000000000 R12: ffff88809361f820 [ 163.087945][ C1] R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff8880960e54e8 [ 163.095914][ C1] ? mod_memcg_page_state+0x16/0x190 [ 163.101190][ C1] ? mod_memcg_page_state+0x16/0x190 [ 163.106462][ C1] free_thread_stack+0x168/0x590 [ 163.111407][ C1] put_task_stack+0xa3/0x130 [ 163.115985][ C1] finish_task_switch+0x3f1/0x550 [ 163.120998][ C1] __schedule+0x9a8/0xcc0 [ 163.125323][ C1] ? ___preempt_schedule+0x16/0x18 [ 163.130418][ C1] preempt_schedule+0xdb/0x120 [ 163.135171][ C1] ___preempt_schedule+0x16/0x18 [ 163.140095][ C1] try_to_wake_up+0xe78/0x1050 [ 163.144854][ C1] wake_up_q+0x8c/0xe0 [ 163.148916][ C1] __mutex_unlock_slowpath+0x586/0x5b0 [ 163.154382][ C1] mutex_unlock+0x1b/0x30 [ 163.158720][ C1] __rtnl_unlock+0x2c/0xa0 [ 163.163124][ C1] netdev_run_todo+0xe5/0xe10 [ 163.167808][ C1] rtnetlink_rcv_msg+0x890/0xd40 [ 163.172758][ C1] ? rcu_lock_release+0x9/0x30 [ 163.177511][ C1] ? rcu_lock_release+0x9/0x30 [ 163.182279][ C1] ? rcu_lock_release+0x9/0x30 [ 163.187041][ C1] netlink_rcv_skb+0x19e/0x3d0 [ 163.191794][ C1] ? rtnetlink_bind+0x80/0x80 [ 163.196474][ C1] rtnetlink_rcv+0x1c/0x20 [ 163.200889][ C1] netlink_unicast+0x767/0x920 [ 163.205743][ C1] netlink_sendmsg+0xa21/0xd40 [ 163.210519][ C1] ? netlink_getsockopt+0x9f0/0x9f0 [ 163.215711][ C1] __sys_sendto+0x442/0x5e0 [ 163.220219][ C1] ? fpregs_assert_state_consistent+0xb6/0xe0 [ 163.226289][ C1] ? prepare_exit_to_usermode+0x221/0x5b0 [ 163.232005][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 163.237456][ C1] __x64_sys_sendto+0xe5/0x100 [ 163.242214][ C1] do_syscall_64+0xf7/0x1c0 [ 163.246707][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 163.252588][ C1] RIP: 0033:0x414373 [ 163.256481][ C1] Code: ff 0f 83 b0 19 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d fd 40 66 00 00 75 17 49 89 ca b8 2c 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 81 19 00 00 c3 48 83 ec 08 e8 87 fa ff ff [ 163.276077][ C1] RSP: 002b:00007ffc0c4488a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 163.284485][ C1] RAX: ffffffffffffffda RBX: 0000000000a72200 RCX: 0000000000414373 [ 163.292454][ C1] RDX: 0000000000000028 RSI: 0000000000a72250 RDI: 0000000000000003 [ 163.300419][ C1] RBP: 0000000000000000 R08: 00007ffc0c4488b0 R09: 000000000000000c [ 163.308380][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 163.316346][ C1] R13: 0000000000000000 R14: 0000000000a72250 R15: 0000000000000003 [ 163.324324][ C1] rcu: rcu_preempt kthread starved for 10541 jiffies! g5761 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 163.335407][ C1] rcu: RCU grace-period kthread stack dump: [ 163.341281][ C1] rcu_preempt R running task 29032 10 2 0x80004000 [ 163.349166][ C1] Call Trace: [ 163.352448][ C1] __schedule+0x9a0/0xcc0 [ 163.356781][ C1] schedule+0x181/0x210 [ 163.360929][ C1] schedule_timeout+0x14f/0x240 [ 163.365768][ C1] ? run_local_timers+0x120/0x120 [ 163.370781][ C1] rcu_gp_kthread+0xed8/0x1770 [ 163.375545][ C1] kthread+0x332/0x350 [ 163.379596][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 163.384696][ C1] ? kthread_blkcg+0xe0/0xe0 [ 163.389273][ C1] ret_from_fork+0x24/0x30