[ 44.214125][ T23] audit: type=1800 audit(1575413227.753:26): pid=7989 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 44.254998][ T23] audit: type=1800 audit(1575413227.753:27): pid=7989 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 44.283253][ T23] audit: type=1800 audit(1575413227.753:28): pid=7989 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. [ 44.805598][ T23] audit: type=1800 audit(1575413228.373:29): pid=7989 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.58' (ECDSA) to the list of known hosts. 2019/12/03 22:47:20 fuzzer started 2019/12/03 22:47:21 dialing manager at 10.128.0.26:42111 2019/12/03 22:47:21 syscalls: 2689 2019/12/03 22:47:21 code coverage: enabled 2019/12/03 22:47:21 comparison tracing: enabled 2019/12/03 22:47:21 extra coverage: extra coverage is not supported by the kernel 2019/12/03 22:47:21 setuid sandbox: enabled 2019/12/03 22:47:21 namespace sandbox: enabled 2019/12/03 22:47:21 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 22:47:21 fault injection: enabled 2019/12/03 22:47:21 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 22:47:21 net packet injection: enabled 2019/12/03 22:47:21 net device setup: enabled 2019/12/03 22:47:21 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 22:47:21 devlink PCI setup: PCI device 0000:00:10.0 is not available 22:47:22 executing program 0: bpf$BPF_BTF_LOAD(0x12, &(0x7f0000000740)={&(0x7f0000000000)={{0xeb9f, 0x1, 0x0, 0x18, 0x0, 0x14, 0x14, 0x2, [@enum={0x0, 0x1, 0x0, 0x6, 0x4, [{0x4}]}]}}, 0x0, 0x2e}, 0x20) 22:47:22 executing program 1: perf_event_open(&(0x7f0000000180)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x7, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext, 0x0, 0x0, 0x0, 0x0, 0x0, 0x8}, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) socket$inet6(0xa, 0x400000000001, 0x0) close(0xffffffffffffffff) openat$cgroup_ro(0xffffffffffffffff, 0x0, 0x0, 0x0) ioctl$DRM_IOCTL_AGP_ALLOC(0xffffffffffffffff, 0xc0206434, &(0x7f00000000c0)) r0 = syz_open_dev$vcsn(&(0x7f0000000300)='/dev/vcs#\x00', 0x0, 0x10001) write$RDMA_USER_CM_CMD_RESOLVE_IP(r0, 0x0, 0x0) getrandom(&(0x7f0000000100)=""/116, 0x74, 0x3) r1 = add_key$user(&(0x7f00000000c0)='user\x00', &(0x7f0000000240)={'syz'}, &(0x7f0000000680)="585ccbe4ed83b836c1a6474914dc55e72206297b6895b66147b3c7218a9169a85ea0bdc9e1587a050000000000000042e33089754c8107c3cd3923dd4a71c2ff06007b6b4816122d2550829eaa9435c99926022b8753a188748c569f435fb3bae96efb74b50ec93cb0725be6027d152f5e8e198a29e5c0d0c60000ce0637ce0000b4ec24c53d3d661ff5ff70e48884ca000018cea71fcfacf40d32e4b58a8d2725561f6110fd7b06f90b5274cc5c1e298a16324fe27da2a9d5ba9ff3c009d308", 0xc0, 0xfffffffffffffffe) r2 = add_key$user(&(0x7f0000000200)='user\x00', &(0x7f00000005c0)={'syz'}, &(0x7f0000000100)='\x00', 0x1, 0xfffffffffffffffd) keyctl$dh_compute(0x17, &(0x7f0000000080)={r1, r1, r2}, &(0x7f0000000440)=""/243, 0xf3, &(0x7f0000000540)={&(0x7f0000000580)={'crc32c-generic\x00'}, &(0x7f0000000340)="4857fd219ec56005a883c4a0121e927ed80800000000000000327b2d1d7589eb69e11a1356ef1bb278b4", 0x2a}) add_key$keyring(0x0, &(0x7f0000000240)={'syz', 0x0}, 0x0, 0x0, 0xfffffffffffffffe) keyctl$negate(0xd, 0x0, 0x80000000, 0x0) socket$inet(0x10, 0x0, 0x0) getsockopt$inet_sctp6_SCTP_GET_ASSOC_ID_LIST(0xffffffffffffffff, 0x84, 0x1d, 0x0, &(0x7f000095dffc)) syzkaller login: [ 59.340622][ T8151] IPVS: ftp: loaded support on port[0] = 21 [ 59.518463][ T8151] chnl_net:caif_netlink_parms(): no params data found [ 59.552162][ T8151] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.560547][ T8151] bridge0: port 1(bridge_slave_0) entered disabled state 22:47:23 executing program 2: unshare(0x8020600) r0 = mq_open(&(0x7f000084dff0)='!selinuxselinux\x00', 0x6e93ebbbcc0884f2, 0x0, &(0x7f0000000040)={0x0, 0x9, 0x8}) mq_timedsend(r0, 0x0, 0x0, 0x0, 0x0) mq_timedreceive(r0, &(0x7f0000000180)=""/204, 0xcc, 0x10, 0x0) [ 59.568571][ T8151] device bridge_slave_0 entered promiscuous mode [ 59.577191][ T8151] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.584559][ T8151] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.594272][ T8151] device bridge_slave_1 entered promiscuous mode [ 59.610759][ T8154] IPVS: ftp: loaded support on port[0] = 21 [ 59.654623][ T8151] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.688186][ T8151] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.759924][ T8151] team0: Port device team_slave_0 added [ 59.790391][ T8151] team0: Port device team_slave_1 added 22:47:23 executing program 3: mkdir(&(0x7f0000000240)='./file1\x00', 0x0) mkdir(&(0x7f0000000180)='./bus\x00', 0x0) creat(&(0x7f0000000040)='./bus/file0\x00', 0x0) mkdir(&(0x7f0000000280)='./file0\x00', 0x0) link(&(0x7f00000000c0)='./bus/file0\x00', &(0x7f0000000200)='./bus/file1\x00') mount$overlay(0x400000, &(0x7f0000000000)='./bus\x00', &(0x7f0000000400)='overlay\x00', 0x0, &(0x7f0000000300)=ANY=[@ANYBLOB='lowerdir=./bus,workdir=./file1,upperdir=./file0']) setxattr(&(0x7f0000000140)='./bus/file1\x00', &(0x7f00000002c0)=@random={'security.', '/dev/sequencer\x00'}, 0x0, 0x0, 0x0) listxattr(&(0x7f0000000880)='./bus/file1\x00', &(0x7f00000008c0)=""/86, 0x56) [ 59.875787][ T8157] IPVS: ftp: loaded support on port[0] = 21 [ 59.907821][ T8151] device hsr_slave_0 entered promiscuous mode [ 59.975330][ T8151] device hsr_slave_1 entered promiscuous mode 22:47:23 executing program 4: r0 = inotify_init1(0x0) ioctl$int_in(r0, 0x5452, &(0x7f0000000040)=0x401) socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000000140)={0xffffffffffffffff}) dup2(r1, r0) [ 60.029552][ T8154] chnl_net:caif_netlink_parms(): no params data found [ 60.052391][ T8159] IPVS: ftp: loaded support on port[0] = 21 [ 60.121872][ T8154] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.144269][ T8154] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.155358][ T8154] device bridge_slave_0 entered promiscuous mode [ 60.189770][ T8154] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.210975][ T8154] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.219300][ T8154] device bridge_slave_1 entered promiscuous mode [ 60.241467][ T8151] netdevsim netdevsim0 netdevsim0: renamed from eth0 22:47:23 executing program 5: r0 = socket$unix(0x1, 0x1, 0x0) r1 = socket$unix(0x1, 0x2, 0x0) r2 = dup2(r1, r0) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) r3 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000300)='/dev/ptmx\x00', 0x8000000000040842, 0x0) ioctl$TIOCSETD(r3, 0x5423, &(0x7f00000003c0)=0xd) write(r3, &(0x7f0000000040)="e0", 0x100000098) [ 60.297932][ T8151] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 60.386521][ T8151] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 60.426575][ T8151] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 60.505053][ T8161] IPVS: ftp: loaded support on port[0] = 21 [ 60.529075][ T8163] IPVS: ftp: loaded support on port[0] = 21 [ 60.545558][ T8151] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.552709][ T8151] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.560498][ T8151] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.567578][ T8151] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.579540][ T8154] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.591062][ T2725] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.599373][ T2725] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.646085][ T8154] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.671771][ T8157] chnl_net:caif_netlink_parms(): no params data found [ 60.685559][ T8154] team0: Port device team_slave_0 added [ 60.717867][ T8154] team0: Port device team_slave_1 added [ 60.782714][ T8159] chnl_net:caif_netlink_parms(): no params data found [ 60.800610][ T8157] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.809818][ T8157] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.817872][ T8157] device bridge_slave_0 entered promiscuous mode [ 60.856119][ T8154] device hsr_slave_0 entered promiscuous mode [ 60.904541][ T8154] device hsr_slave_1 entered promiscuous mode [ 60.944233][ T8154] debugfs: Directory 'hsr0' with parent '/' already present! [ 60.971094][ T8157] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.978883][ T8157] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.986824][ T8157] device bridge_slave_1 entered promiscuous mode [ 61.038502][ T8157] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.052001][ T8154] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 61.112645][ T8159] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.120919][ T8159] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.128783][ T8159] device bridge_slave_0 entered promiscuous mode [ 61.136687][ T8159] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.143740][ T8159] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.152100][ T8159] device bridge_slave_1 entered promiscuous mode [ 61.160508][ T8151] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.171065][ T8157] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.180976][ T8154] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 61.283186][ T8154] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 61.329694][ T8154] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 61.389954][ T8159] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.400261][ T8161] chnl_net:caif_netlink_parms(): no params data found [ 61.411434][ T8157] team0: Port device team_slave_0 added [ 61.422229][ T8151] 8021q: adding VLAN 0 to HW filter on device team0 [ 61.429711][ T8163] chnl_net:caif_netlink_parms(): no params data found [ 61.440061][ T8159] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.453120][ T8157] team0: Port device team_slave_1 added [ 61.465854][ T2880] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 61.473904][ T2880] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 61.513587][ T2880] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 61.522814][ T2880] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 61.531755][ T2880] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.538956][ T2880] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.546827][ T2880] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 61.555464][ T2880] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.563740][ T2880] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.570840][ T2880] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.578827][ T2880] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 61.587374][ T2880] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 61.628738][ T8159] team0: Port device team_slave_0 added [ 61.636392][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 61.645017][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 61.653264][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 61.661862][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 61.670631][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 61.679366][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 61.687621][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 61.716600][ T8161] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.723714][ T8161] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.732080][ T8161] device bridge_slave_0 entered promiscuous mode [ 61.743291][ T8161] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.750543][ T8161] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.758283][ T8161] device bridge_slave_1 entered promiscuous mode [ 61.765975][ T8159] team0: Port device team_slave_1 added [ 61.776878][ T8151] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 61.789198][ T8151] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 61.799404][ T8163] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.807113][ T8163] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.814825][ T8163] device bridge_slave_0 entered promiscuous mode [ 61.866748][ T8157] device hsr_slave_0 entered promiscuous mode [ 61.905339][ T8157] device hsr_slave_1 entered promiscuous mode [ 61.944233][ T8157] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.957423][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 61.966181][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 61.988691][ T8163] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.996568][ T8163] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.005235][ T8163] device bridge_slave_1 entered promiscuous mode [ 62.030846][ T8161] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.086869][ T8159] device hsr_slave_0 entered promiscuous mode [ 62.124452][ T8159] device hsr_slave_1 entered promiscuous mode [ 62.164214][ T8159] debugfs: Directory 'hsr0' with parent '/' already present! [ 62.186082][ T8163] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.201459][ T8163] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.216049][ T8161] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.234961][ T8157] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 62.291313][ T8157] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 62.358377][ T8161] team0: Port device team_slave_0 added [ 62.366835][ T8163] team0: Port device team_slave_0 added [ 62.374453][ T8161] team0: Port device team_slave_1 added [ 62.380244][ T8157] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 62.398260][ T2880] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 62.406165][ T2880] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 62.415734][ T8154] 8021q: adding VLAN 0 to HW filter on device bond0 [ 62.428734][ T8151] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 62.440415][ T8163] team0: Port device team_slave_1 added [ 62.456709][ T8157] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 62.502095][ T8154] 8021q: adding VLAN 0 to HW filter on device team0 [ 62.546338][ T8161] device hsr_slave_0 entered promiscuous mode [ 62.584480][ T8161] device hsr_slave_1 entered promiscuous mode [ 62.624135][ T8161] debugfs: Directory 'hsr0' with parent '/' already present! [ 62.633226][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 62.641223][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 62.706298][ T8163] device hsr_slave_0 entered promiscuous mode [ 62.744499][ T8163] device hsr_slave_1 entered promiscuous mode [ 62.804223][ T8163] debugfs: Directory 'hsr0' with parent '/' already present! [ 167.883992][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 167.890991][ C1] (detected by 1, t=10502 jiffies, g=6033, q=103) [ 167.897477][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294953933-4294943430), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 167.910833][ C1] syz-executor.0 R running task 29032 8174 8151 0x0000400e [ 167.918985][ C1] Call Trace: [ 167.922255][ C1] [ 167.925188][ C1] sched_show_task+0x40f/0x560 [ 167.929973][ C1] rcu_sched_clock_irq+0x1861/0x1ad0 [ 167.935256][ C1] update_process_times+0x12d/0x180 [ 167.940443][ C1] tick_sched_timer+0x263/0x420 [ 167.945282][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 167.950815][ C1] __hrtimer_run_queues+0x403/0x840 [ 167.956014][ C1] hrtimer_interrupt+0x38c/0xda0 [ 167.960999][ C1] ? debug_smp_processor_id+0x9/0x20 [ 167.966364][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 167.972157][ C1] apic_timer_interrupt+0xf/0x20 [ 167.977075][ C1] [ 167.980003][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x50 [ 167.986142][ C1] Code: 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 13 00 00 48 39 cf 73 08 48 89 44 f2 08 48 89 [ 168.005861][ C1] RSP: 0018:ffffc900028c7858 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 168.014284][ C1] RAX: ffffffff81486ea4 RBX: ffffea00029d33c0 RCX: ffff88806c7f0040 [ 168.022273][ C1] RDX: ffffc90001f19000 RSI: 000000000003ffff RDI: 0000000000040000 [ 168.030340][ C1] RBP: ffffc900028c7898 R08: dffffc0000000000 R09: fffffbfff12877ed [ 168.038320][ C1] R10: fffffbfff12877ed R11: 0000000000000000 R12: ffff8880a8e99220 [ 168.046291][ C1] R13: dffffc0000000000 R14: 1ffff110151d3244 R15: ffff8880a80bba28 [ 168.054291][ C1] ? free_thread_stack+0x124/0x590 [ 168.059428][ C1] ? free_thread_stack+0x124/0x590 [ 168.064530][ C1] put_task_stack+0xa3/0x130 [ 168.069110][ C1] finish_task_switch+0x3f1/0x550 [ 168.074126][ C1] __schedule+0x9a8/0xcc0 [ 168.078628][ C1] ? ___preempt_schedule+0x16/0x18 [ 168.083735][ C1] preempt_schedule+0xdb/0x120 [ 168.088487][ C1] ___preempt_schedule+0x16/0x18 [ 168.093424][ C1] try_to_wake_up+0xe78/0x1050 [ 168.098186][ C1] wake_up_q+0x8c/0xe0 [ 168.102248][ C1] futex_wake+0x51c/0x6f0 [ 168.106574][ C1] do_futex+0x3f5/0x3d60 [ 168.110807][ C1] ? __lock_acquire+0xc75/0x1be0 [ 168.115743][ C1] ? kcov_ioctl+0x285/0x2c0 [ 168.120262][ C1] ? __might_fault+0xf9/0x160 [ 168.124937][ C1] ? __might_fault+0xf9/0x160 [ 168.129604][ C1] ? check_preemption_disabled+0xb4/0x260 [ 168.135307][ C1] ? debug_smp_processor_id+0x9/0x20 [ 168.140584][ C1] __se_sys_futex+0x28c/0x360 [ 168.145248][ C1] ? prepare_exit_to_usermode+0x221/0x5b0 [ 168.150959][ C1] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 168.156691][ C1] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 168.162138][ C1] __x64_sys_futex+0xe5/0x100 [ 168.166805][ C1] do_syscall_64+0xf7/0x1c0 [ 168.171299][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 168.177176][ C1] RIP: 0033:0x45a679 [ 168.181059][ C1] Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 168.200671][ C1] RSP: 002b:00007f3702a09cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 168.209078][ C1] RAX: ffffffffffffffda RBX: 000000000075bf28 RCX: 000000000045a679 [ 168.217040][ C1] RDX: 00000000004c0b1a RSI: 0000000000000081 RDI: 000000000075bf2c [ 168.225086][ C1] RBP: 000000000075bf20 R08: 0000000000000016 R09: 0000000000000000 [ 168.233044][ C1] R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000075bf2c [ 168.241069][ C1] R13: 00007ffc004abeaf R14: 00007f3702a0a9c0 R15: 000000000075bf2c [ 168.249137][ C1] rcu: rcu_preempt kthread starved for 10538 jiffies! g6033 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 168.260217][ C1] rcu: RCU grace-period kthread stack dump: [ 168.266186][ C1] rcu_preempt R running task 29104 10 2 0x80004008 [ 168.274075][ C1] Call Trace: [ 168.277359][ C1] __schedule+0x9a8/0xcc0 [ 168.281773][ C1] schedule+0x181/0x210 [ 168.285918][ C1] schedule_timeout+0x14f/0x240 [ 168.290757][ C1] ? run_local_timers+0x120/0x120 [ 168.295802][ C1] rcu_gp_kthread+0xed8/0x1770 [ 168.300564][ C1] kthread+0x332/0x350 [ 168.304617][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 168.309713][ C1] ? kthread_blkcg+0xe0/0xe0 [ 168.314293][ C1] ret_from_fork+0x24/0x30