[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 43.809433][ T23] audit: type=1800 audit(1575432515.227:25): pid=7985 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 43.835140][ T23] audit: type=1800 audit(1575432515.227:26): pid=7985 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 43.887822][ T23] audit: type=1800 audit(1575432515.237:27): pid=7985 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 '10.128.1.1' (ECDSA) to the list of known hosts. 2019/12/04 04:08:46 fuzzer started 2019/12/04 04:08:48 dialing manager at 10.128.0.26:42111 2019/12/04 04:08:48 syscalls: 2689 2019/12/04 04:08:48 code coverage: enabled 2019/12/04 04:08:48 comparison tracing: enabled 2019/12/04 04:08:48 extra coverage: extra coverage is not supported by the kernel 2019/12/04 04:08:48 setuid sandbox: enabled 2019/12/04 04:08:48 namespace sandbox: enabled 2019/12/04 04:08:48 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/04 04:08:48 fault injection: enabled 2019/12/04 04:08:48 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/04 04:08:48 net packet injection: enabled 2019/12/04 04:08:48 net device setup: enabled 2019/12/04 04:08:48 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/04 04:08:48 devlink PCI setup: PCI device 0000:00:10.0 is not available 04:08:49 executing program 0: r0 = socket$inet6_sctp(0xa, 0x5, 0x84) setsockopt$inet_sctp_SCTP_SOCKOPT_BINDX_ADD(r0, 0x84, 0x64, &(0x7f0000000180)=[@in6={0xa, 0x4e22, 0x0, @ipv4={[0x0, 0x0, 0x0, 0xfec0000000000000], [], @dev={0xac, 0x14, 0x14, 0x24}}}, @in={0x2, 0x4e22, @remote}], 0x2c) 04:08:49 executing program 1: r0 = socket$inet(0x2, 0x3, 0x2) setsockopt$inet_int(r0, 0x1f00000000000000, 0xcb, 0x0, 0x0) syzkaller login: [ 57.991630][ T8147] IPVS: ftp: loaded support on port[0] = 21 [ 58.110227][ T8147] chnl_net:caif_netlink_parms(): no params data found [ 58.183282][ T8147] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.205177][ T8147] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.212804][ T8147] device bridge_slave_0 entered promiscuous mode [ 58.228179][ T8147] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.235463][ T8147] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.243299][ T8147] device bridge_slave_1 entered promiscuous mode [ 58.259440][ T8150] IPVS: ftp: loaded support on port[0] = 21 04:08:49 executing program 2: r0 = socket$unix(0x1, 0x1, 0x0) r1 = socket$unix(0x1, 0x1, 0x0) r2 = dup2(r1, r0) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) r3 = socket$kcm(0xa, 0x2, 0x73) bind$inet6(r3, &(0x7f0000000000)={0xa, 0x0, 0x0, @loopback}, 0x69) connect(r3, &(0x7f0000000180)=@in6={0xa, 0x0, 0x0, @empty}, 0x3f) sendmmsg$inet_sctp(r3, &(0x7f00000003c0), 0x3a301e0909ff6cd, 0x934) [ 58.283055][ T8147] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.309733][ T8147] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.348606][ T8147] team0: Port device team_slave_0 added [ 58.365848][ T8147] team0: Port device team_slave_1 added [ 58.437752][ T8147] device hsr_slave_0 entered promiscuous mode [ 58.475404][ T8147] device hsr_slave_1 entered promiscuous mode 04:08:49 executing program 3: perf_event_open(&(0x7f000001d000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7f, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x81, 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, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) r0 = socket$packet(0x11, 0x3, 0x300) setsockopt$SO_ATTACH_FILTER(r0, 0x1, 0x1a, &(0x7f0000fbe000)={0x2, &(0x7f0000000040)=[{0xb1}, {0x80000006}]}, 0x10) [ 58.550337][ T8150] chnl_net:caif_netlink_parms(): no params data found [ 58.558339][ T8153] IPVS: ftp: loaded support on port[0] = 21 [ 58.651422][ T8150] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.676611][ T8150] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.696806][ T8150] device bridge_slave_0 entered promiscuous mode [ 58.719399][ T8147] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 58.767303][ T8150] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.774384][ T8150] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.795829][ T8150] device bridge_slave_1 entered promiscuous mode 04:08:50 executing program 4: bpf$PROG_LOAD(0x5, &(0x7f000000e000)={0x3, 0x4, &(0x7f0000000040)=@framed={{0xffffffb4, 0x5, 0x0, 0x0, 0x0, 0x61, 0x10, 0x28}, [@ldst={0x6, 0x0, 0x6}]}, &(0x7f0000003ff6)='G\x00', 0x4, 0xfd90, &(0x7f000000cf3d)=""/195, 0x0, 0x0, [], 0x0, 0x0, 0xffffffffffffffff, 0x8, &(0x7f0000000000), 0x366, 0x10, &(0x7f0000000000), 0x1dd}, 0x48) [ 58.820914][ T8155] IPVS: ftp: loaded support on port[0] = 21 [ 58.829738][ T8147] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 58.878402][ T8147] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 58.953911][ T8147] netdevsim netdevsim0 netdevsim3: renamed from eth3 04:08:50 executing program 5: r0 = socket$kcm(0x2b, 0x1, 0x0) ioctl$PERF_EVENT_IOC_ENABLE(r0, 0x8912, 0x400200) bpf$PROG_LOAD(0x5, &(0x7f0000000580)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, [], 0x0, 0x0, 0xffffffffffffffff, 0x8, &(0x7f0000000500), 0x8, 0x10, 0x0}, 0x70) r1 = bpf$PROG_LOAD(0x5, &(0x7f0000000080)={0x1, 0x5, &(0x7f00000003c0)=ANY=[@ANYBLOB="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"], &(0x7f0000000140)='vS\xfdIG|\x8aL[\xf2\'\x9c\xea\xb1\xc0\xb1\x19\x91\x9d/Q\xd9\xe3T\xce\xdax;\x02%\xc5\x1c\xd5GA\xad[(\xbblZ\x01\x1dF\x92#]%sj\xd0i\xc6C\x1f&\xe2\xc5\xa5z\x7f\xe1 \xfb\xc27\x03\x84\x8e\xef\x82-\xfc$$\xaf\v\xbd\x95\x1e\x0f\xbeVI\xec\r!\f\x86\xf5\xfb[Y\x1e\xd4\xdfc\xb1\xc8\xa2\xc1/5\xffr\x1f\x80@\xb8F\xea\xde\x93\xa1\xcb6\xee\xf2\xce\x95\xf2\xfdxR\x17F\xad\xc1~\xa2\x97=O^o\"\xbb\xa8\x9746'}, 0x48) bpf$BPF_GET_PROG_INFO(0xf, &(0x7f0000000380)={r1, 0xc0, &(0x7f00000005c0)={0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ""/16, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}}, 0x10) [ 59.021016][ T8150] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.042129][ T8147] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.049316][ T8147] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.057039][ T8147] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.064105][ T8147] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.101264][ T8150] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.141725][ T8157] IPVS: ftp: loaded support on port[0] = 21 [ 59.151963][ T8153] chnl_net:caif_netlink_parms(): no params data found [ 59.167179][ T8159] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.176855][ T8159] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.265351][ T8147] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.278741][ T8153] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.286192][ T8153] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.293872][ T8153] device bridge_slave_0 entered promiscuous mode [ 59.306411][ T8150] team0: Port device team_slave_0 added [ 59.313125][ T8153] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.320257][ T8153] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.328587][ T8153] device bridge_slave_1 entered promiscuous mode [ 59.345701][ T8153] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.358814][ T8162] IPVS: ftp: loaded support on port[0] = 21 [ 59.367916][ T8150] team0: Port device team_slave_1 added [ 59.388195][ T8153] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.468482][ T8150] device hsr_slave_0 entered promiscuous mode [ 59.525376][ T8150] device hsr_slave_1 entered promiscuous mode [ 59.565543][ T8150] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.613137][ T8155] chnl_net:caif_netlink_parms(): no params data found [ 59.631026][ T8153] team0: Port device team_slave_0 added [ 59.639500][ T8153] team0: Port device team_slave_1 added [ 59.658276][ T8147] 8021q: adding VLAN 0 to HW filter on device team0 [ 59.717806][ T8153] device hsr_slave_0 entered promiscuous mode [ 59.755495][ T8153] device hsr_slave_1 entered promiscuous mode [ 59.815335][ T8153] debugfs: Directory 'hsr0' with parent '/' already present! [ 59.826253][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 59.834490][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 59.842437][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 59.850869][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 59.859403][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.866493][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.911728][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 59.920416][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 59.928885][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.935962][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.993381][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 60.002146][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 60.010921][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 60.019885][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 60.032581][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 60.046752][ T8153] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 60.096415][ T8150] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 60.147307][ T8150] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 60.197446][ T8150] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 60.245798][ T8157] chnl_net:caif_netlink_parms(): no params data found [ 60.259736][ T8153] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 60.307471][ T8153] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 60.348542][ T8153] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 60.396951][ T8150] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 60.437104][ T8155] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.444175][ T8155] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.452183][ T8155] device bridge_slave_0 entered promiscuous mode [ 60.489630][ T8157] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.497108][ T8157] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.504616][ T8157] device bridge_slave_0 entered promiscuous mode [ 60.512050][ T8155] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.519948][ T8155] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.529614][ T8155] device bridge_slave_1 entered promiscuous mode [ 60.542704][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 60.552616][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 60.561086][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 60.569313][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 60.578196][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 60.586598][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 60.597264][ T8147] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 60.611490][ T8157] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.618807][ T8157] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.626600][ T8157] device bridge_slave_1 entered promiscuous mode [ 60.650086][ T8162] chnl_net:caif_netlink_parms(): no params data found [ 60.687933][ T8155] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.725322][ T8155] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.752392][ T8157] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.774277][ T8157] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.798601][ T8162] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.808780][ T8162] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.816502][ T8162] device bridge_slave_0 entered promiscuous mode [ 60.830927][ T8155] team0: Port device team_slave_0 added [ 60.840718][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 60.848305][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 60.859388][ T8147] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 60.869987][ T8157] team0: Port device team_slave_0 added [ 60.878285][ T8157] team0: Port device team_slave_1 added [ 60.884918][ T8162] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.893115][ T8162] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.901470][ T8162] device bridge_slave_1 entered promiscuous mode [ 60.909977][ T8155] team0: Port device team_slave_1 added [ 60.921587][ T8150] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.987042][ T8157] device hsr_slave_0 entered promiscuous mode [ 61.036219][ T8157] device hsr_slave_1 entered promiscuous mode [ 61.075139][ T8157] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.091130][ T8153] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.109220][ T8162] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.120415][ T8162] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.162534][ T8150] 8021q: adding VLAN 0 to HW filter on device team0 [ 166.185061][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 166.192064][ C1] (detected by 1, t=10502 jiffies, g=6045, q=68) [ 166.198468][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294953770-4294943267), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 166.211824][ C1] syz-executor.4 R running task 25056 8157 8156 0x0000400a [ 166.219709][ C1] Call Trace: [ 166.222983][ C1] [ 166.225833][ C1] sched_show_task+0x40f/0x560 [ 166.230591][ C1] rcu_sched_clock_irq+0x1861/0x1ad0 [ 166.235876][ C1] update_process_times+0x12d/0x180 [ 166.241066][ C1] tick_sched_timer+0x263/0x420 [ 166.245903][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 166.251436][ C1] __hrtimer_run_queues+0x403/0x840 [ 166.256642][ C1] hrtimer_interrupt+0x38c/0xda0 [ 166.261583][ C1] ? debug_smp_processor_id+0x9/0x20 [ 166.266858][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 166.272392][ C1] apic_timer_interrupt+0xf/0x20 [ 166.277321][ C1] [ 166.280252][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 [ 166.286409][ 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 [ 166.305998][ C1] RSP: 0018:ffffc900029b7280 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 166.314395][ C1] RAX: ffffffff81487433 RBX: 0000000000000000 RCX: ffff8880a2bee680 [ 166.322351][ C1] RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea00023eb380 [ 166.330310][ C1] RBP: ffffc900029b72a8 R08: 000000000003a768 R09: ffffed101393faf7 [ 166.338270][ C1] R10: ffffed101393faf7 R11: 0000000000000000 R12: dffffc0000000000 [ 166.346226][ C1] R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff88809c9fd7a8 [ 166.354202][ C1] ? mod_memcg_page_state+0x123/0x190 [ 166.359637][ C1] ? mod_memcg_page_state+0x123/0x190 [ 166.364996][ C1] free_thread_stack+0x168/0x590 [ 166.369923][ C1] put_task_stack+0xa3/0x130 [ 166.374513][ C1] finish_task_switch+0x3f1/0x550 [ 166.379537][ C1] __schedule+0x9a8/0xcc0 [ 166.383872][ C1] ? ___preempt_schedule+0x16/0x18 [ 166.388969][ C1] preempt_schedule+0xdb/0x120 [ 166.393723][ C1] ___preempt_schedule+0x16/0x18 [ 166.398649][ C1] try_to_wake_up+0xe78/0x1050 [ 166.403433][ C1] wake_up_q+0x8c/0xe0 [ 166.407508][ C1] __mutex_unlock_slowpath+0x586/0x5b0 [ 166.412972][ C1] mutex_unlock+0x1b/0x30 [ 166.417296][ C1] __rtnl_unlock+0x2c/0xa0 [ 166.421705][ C1] netdev_run_todo+0xe5/0xe10 [ 166.426383][ C1] rtnl_unlock+0xe/0x10 [ 166.430526][ C1] nsim_create+0x224/0x230 [ 166.434945][ C1] __nsim_dev_port_add+0x289/0x4d0 [ 166.440040][ C1] ? debugfs_create_file_unsafe+0x4a/0x60 [ 166.445755][ C1] ? nsim_bpf_dev_init+0x1eb/0x220 [ 166.450853][ C1] nsim_dev_probe+0xb55/0xef0 [ 166.455533][ C1] nsim_bus_probe+0x15/0x20 [ 166.460024][ C1] really_probe+0x71c/0xf40 [ 166.464519][ C1] driver_probe_device+0xfc/0x260 [ 166.469530][ C1] ? parse_option_str+0x1bf/0x200 [ 166.474542][ C1] __device_attach_driver+0x336/0x3f0 [ 166.479923][ C1] ? coredump_store+0x90/0x90 [ 166.484607][ C1] bus_for_each_drv+0x12b/0x180 [ 166.489466][ C1] __device_attach+0x1ea/0x390 [ 166.494226][ C1] device_initial_probe+0x1a/0x20 [ 166.499242][ C1] bus_probe_device+0xb9/0x1f0 [ 166.504008][ C1] device_add+0x1710/0x1ad0 [ 166.508526][ C1] device_register+0x1d/0x20 [ 166.513112][ C1] new_device_store+0x286/0x510 [ 166.517956][ C1] ? nsim_num_vf+0x50/0x50 [ 166.522367][ C1] bus_attr_store+0x78/0x90 [ 166.526860][ C1] ? bus_attr_show+0x90/0x90 [ 166.531443][ C1] sysfs_kf_write+0x281/0x2f0 [ 166.536113][ C1] ? sysfs_kf_read+0x370/0x370 [ 166.540866][ C1] kernfs_fop_write+0x3e4/0x4e0 [ 166.545707][ C1] ? kernfs_fop_read+0x580/0x580 [ 166.550642][ C1] __vfs_write+0xb8/0x740 [ 166.555051][ C1] ? rcu_read_lock_any_held+0x13d/0x1a0 [ 166.560587][ C1] ? __sb_start_write+0x382/0x430 [ 166.565601][ C1] vfs_write+0x275/0x590 [ 166.569839][ C1] ksys_write+0x117/0x220 [ 166.574161][ C1] __x64_sys_write+0x7b/0x90 [ 166.578750][ C1] do_syscall_64+0xf7/0x1c0 [ 166.583244][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 166.589124][ C1] RIP: 0033:0x414130 [ 166.593007][ C1] Code: b0 89 c8 f7 d8 eb ed b8 6e 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 3d 3d 43 66 00 00 75 14 b8 01 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 c4 1b 00 00 c3 48 83 ec 08 e8 ca fc ff ff [ 166.612600][ C1] RSP: 002b:00007fffdd5c8598 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 166.620997][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000414130 [ 166.628958][ C1] RDX: 0000000000000003 RSI: 00007fffdd5c85c0 RDI: 0000000000000004 [ 166.636915][ C1] RBP: 00007fffdd5c85c0 R08: 0000000000000000 R09: 0000000000000003 [ 166.644873][ C1] R10: 0000000000000075 R11: 0000000000000246 R12: 00000000004bfc97 [ 166.652832][ C1] R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000 [ 166.660901][ C1] rcu: rcu_preempt kthread starved for 10549 jiffies! g6045 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 166.671982][ C1] rcu: RCU grace-period kthread stack dump: [ 166.677856][ C1] rcu_preempt R running task 28992 10 2 0x80004000 [ 166.685741][ C1] Call Trace: [ 166.689021][ C1] __schedule+0x9a0/0xcc0 [ 166.693345][ C1] schedule+0x181/0x210 [ 166.697622][ C1] schedule_timeout+0x14f/0x240 [ 166.702463][ C1] ? run_local_timers+0x120/0x120 [ 166.707512][ C1] rcu_gp_kthread+0xed8/0x1770 [ 166.712272][ C1] kthread+0x332/0x350 [ 166.716426][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 166.721526][ C1] ? kthread_blkcg+0xe0/0xe0 [ 166.726191][ C1] ret_from_fork+0x24/0x30