[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 46.130123][ T23] audit: type=1800 audit(1575367772.503:25): pid=8203 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 46.160392][ T23] audit: type=1800 audit(1575367772.503:26): pid=8203 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 46.181574][ T23] audit: type=1800 audit(1575367772.503:27): pid=8203 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 '10.128.0.77' (ECDSA) to the list of known hosts. 2019/12/03 10:09:43 fuzzer started 2019/12/03 10:09:44 dialing manager at 10.128.0.26:38907 2019/12/03 10:09:44 syscalls: 2697 2019/12/03 10:09:44 code coverage: enabled 2019/12/03 10:09:44 comparison tracing: enabled 2019/12/03 10:09:44 extra coverage: extra coverage is not supported by the kernel 2019/12/03 10:09:44 setuid sandbox: enabled 2019/12/03 10:09:44 namespace sandbox: enabled 2019/12/03 10:09:44 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/03 10:09:44 fault injection: enabled 2019/12/03 10:09:44 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/03 10:09:44 net packet injection: enabled 2019/12/03 10:09:44 net device setup: enabled 2019/12/03 10:09:44 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/03 10:09:44 devlink PCI setup: PCI device 0000:00:10.0 is not available 10:09:45 executing program 0: r0 = socket$inet6_icmp_raw(0xa, 0x3, 0x3a) setsockopt$inet6_MRT6_DEL_MFC(r0, 0x29, 0xd1, &(0x7f0000000000)={{0x5f5e0ff, 0x0, 0x0, @dev}, {0xa, 0x0, 0x0, @mcast2}}, 0x4) 10:09:46 executing program 1: bpf$MAP_CREATE(0x900000000000000, &(0x7f0000000100)={0x4, 0x4, 0x200000004, 0x7, 0x0, 0xffffffffffffffff, 0x0, [0x302e, 0x2e, 0x5f, 0x80ffff, 0x5f, 0x5f, 0x80ffff, 0x5f, 0x2e, 0x2e, 0x80ffff, 0x2e]}, 0x3c) syzkaller login: [ 59.667222][ T8368] IPVS: ftp: loaded support on port[0] = 21 10:09:46 executing program 2: r0 = socket$netlink(0x10, 0x3, 0x0) socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000140)={0xffffffffffffffff}) r2 = dup(r1) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) sendmsg$nl_route(r0, &(0x7f0000000580)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000040)=@newlink={0x50, 0x10, 0x705, 0x0, 0x0, {}, [@IFLA_OPERSTATE={0x8, 0xd}, @IFLA_LINKINFO={0x28, 0x12, @veth={{0xc, 0x1, 'veth\x00'}, {0x18, 0x2, @VETH_INFO_PEER={0x14}}}}]}, 0x50}}, 0x0) [ 59.855142][ T8371] IPVS: ftp: loaded support on port[0] = 21 [ 59.862753][ T8368] chnl_net:caif_netlink_parms(): no params data found [ 59.923566][ T8368] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.932543][ T8368] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.940698][ T8368] device bridge_slave_0 entered promiscuous mode [ 59.951357][ T8368] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.958512][ T8368] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.967194][ T8368] device bridge_slave_1 entered promiscuous mode [ 59.994943][ T8368] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.022026][ T8368] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.074510][ T8368] team0: Port device team_slave_0 added [ 60.092284][ T8368] team0: Port device team_slave_1 added 10:09:46 executing program 3: r0 = socket$inet6(0xa, 0x6, 0x0) bind$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20}, 0x1c) listen(r0, 0x4d) r1 = socket$inet_dccp(0x2, 0x6, 0x0) connect$inet(r1, &(0x7f0000e5c000)={0x2, 0x4e20, @loopback=0x7f000002}, 0x10) getsockopt$inet_int(r1, 0x10d, 0xc9, &(0x7f0000000140), &(0x7f00000000c0)=0x4) [ 60.168975][ T8373] IPVS: ftp: loaded support on port[0] = 21 [ 60.191454][ T8368] device hsr_slave_0 entered promiscuous mode [ 60.230390][ T8368] device hsr_slave_1 entered promiscuous mode [ 60.283480][ T8371] chnl_net:caif_netlink_parms(): no params data found [ 60.368270][ T8376] IPVS: ftp: loaded support on port[0] = 21 [ 60.386012][ T8371] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.411268][ T8371] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.419239][ T8371] device bridge_slave_0 entered promiscuous mode 10:09:46 executing program 4: prctl$PR_SET_SECUREBITS(0x1c, 0x37) prctl$PR_SET_KEEPCAPS(0x8, 0x0) [ 60.453593][ T8368] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 60.501542][ T8368] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 60.542126][ T8371] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.549258][ T8371] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.573202][ T8371] device bridge_slave_1 entered promiscuous mode [ 60.598427][ T8368] netdevsim netdevsim0 netdevsim2: renamed from eth2 10:09:47 executing program 5: r0 = socket$inet6(0xa, 0x5, 0x0) bind$inet6(r0, &(0x7f00002aafe4)={0xa, 0x0, 0x0, @ipv4}, 0x1c) socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000000300)={0xffffffffffffffff, 0xffffffffffffffff}) r2 = dup(r1) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) setsockopt$inet_sctp6_SCTP_I_WANT_MAPPED_V4_ADDR(r0, 0x84, 0xc, &(0x7f00000001c0), 0x4) listen(r0, 0xffffffffefffffff) [ 60.667258][ T8368] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 60.786547][ T8371] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 60.798237][ T8371] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 60.843831][ T8381] IPVS: ftp: loaded support on port[0] = 21 [ 60.844036][ T8379] IPVS: ftp: loaded support on port[0] = 21 [ 60.866035][ T8371] team0: Port device team_slave_0 added [ 60.874278][ T8371] team0: Port device team_slave_1 added [ 60.907246][ T8373] chnl_net:caif_netlink_parms(): no params data found [ 60.991995][ T8371] device hsr_slave_0 entered promiscuous mode [ 61.030081][ T8371] device hsr_slave_1 entered promiscuous mode [ 61.079692][ T8371] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.142513][ T8368] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.165125][ T8373] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.172544][ T8373] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.180644][ T8373] device bridge_slave_0 entered promiscuous mode [ 61.191574][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 61.200741][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 61.210565][ T8368] 8021q: adding VLAN 0 to HW filter on device team0 [ 61.230380][ T8373] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.237677][ T8373] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.245926][ T8373] device bridge_slave_1 entered promiscuous mode [ 61.253119][ T8376] chnl_net:caif_netlink_parms(): no params data found [ 61.283620][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 61.292743][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 61.301706][ T2917] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.309026][ T2917] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.317158][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 61.326050][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.334495][ T2917] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.341738][ T2917] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.349918][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 61.371836][ T8371] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 61.427803][ T8373] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.438585][ T8383] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 61.453838][ T8371] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 61.492647][ T8371] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 61.552320][ T8373] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.576060][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 61.585420][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 61.594274][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 61.602985][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 61.619769][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 61.628258][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 61.637849][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 61.646692][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 61.655341][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 61.663610][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 61.672474][ T8371] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 61.745549][ T8368] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 61.762019][ T8373] team0: Port device team_slave_0 added [ 61.769099][ T8376] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.777767][ T8376] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.787320][ T8376] device bridge_slave_0 entered promiscuous mode [ 61.811661][ T8379] chnl_net:caif_netlink_parms(): no params data found [ 61.822079][ T8373] team0: Port device team_slave_1 added [ 61.837541][ T8376] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.844819][ T8376] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.852834][ T8376] device bridge_slave_1 entered promiscuous mode [ 61.932997][ T8373] device hsr_slave_0 entered promiscuous mode [ 61.979939][ T8373] device hsr_slave_1 entered promiscuous mode [ 62.019554][ T8373] debugfs: Directory 'hsr0' with parent '/' already present! [ 62.059011][ T8376] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.071247][ T8376] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.101266][ T8376] team0: Port device team_slave_0 added [ 62.113015][ T8376] team0: Port device team_slave_1 added [ 62.135255][ T8379] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.142709][ T8379] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.151130][ T8379] device bridge_slave_0 entered promiscuous mode [ 62.160450][ T8379] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.167889][ T8379] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.175865][ T8379] device bridge_slave_1 entered promiscuous mode [ 62.222862][ T8383] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 62.230493][ T8383] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 62.240847][ T8381] chnl_net:caif_netlink_parms(): no params data found [ 62.258216][ T8379] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.272517][ T8368] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 62.284614][ T8373] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 62.362539][ T8373] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 62.401460][ T8373] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 62.457117][ T8373] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 62.494957][ T8379] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.541500][ T8376] device hsr_slave_0 entered promiscuous mode [ 62.589966][ T8376] device hsr_slave_1 entered promiscuous mode [ 62.629600][ T8376] debugfs: Directory 'hsr0' with parent '/' already present! [ 62.670681][ T8379] team0: Port device team_slave_0 added [ 62.678938][ T8379] team0: Port device team_slave_1 added [ 62.725437][ T8381] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.734353][ T8381] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.743101][ T8381] device bridge_slave_0 entered promiscuous mode [ 62.752386][ T8381] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.760445][ T8381] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.768926][ T8381] device bridge_slave_1 entered promiscuous mode [ 62.816461][ T8376] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 62.871699][ T8376] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 167.859290][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 167.866878][ C0] rcu: 0-....: (10499 ticks this GP) idle=c1a/1/0x4000000000000002 softirq=11118/11118 fqs=2825 [ 167.877864][ C0] (t=10500 jiffies g=6749 q=127) [ 167.883081][ C0] rcu: rcu_preempt kthread starved for 4821 jiffies! g6749 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 167.894322][ C0] rcu: RCU grace-period kthread stack dump: [ 167.900215][ C0] rcu_preempt R running task 29104 10 2 0x80004000 [ 167.908108][ C0] Call Trace: [ 167.911400][ C0] __schedule+0x9a0/0xcc0 [ 167.915725][ C0] schedule+0x181/0x210 [ 167.919872][ C0] schedule_timeout+0x14f/0x240 [ 167.924820][ C0] ? run_local_timers+0x120/0x120 [ 167.929841][ C0] rcu_gp_kthread+0xed8/0x1770 [ 167.934683][ C0] kthread+0x332/0x350 [ 167.938865][ C0] ? rcu_report_qs_rsp+0x140/0x140 [ 167.944003][ C0] ? kthread_blkcg+0xe0/0xe0 [ 167.948677][ C0] ret_from_fork+0x24/0x30 [ 167.953106][ C0] NMI backtrace for cpu 0 [ 167.957424][ C0] CPU: 0 PID: 8368 Comm: syz-executor.0 Not tainted 5.4.0-syzkaller #0 [ 167.965652][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 167.975689][ C0] Call Trace: [ 167.978960][ C0] [ 167.981798][ C0] dump_stack+0x1fb/0x318 [ 167.986112][ C0] nmi_cpu_backtrace+0xaf/0x1a0 [ 167.991461][ C0] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 167.997593][ C0] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 168.003637][ C0] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 168.009680][ C0] arch_trigger_cpumask_backtrace+0x10/0x20 [ 168.015548][ C0] rcu_dump_cpu_stacks+0x15a/0x220 [ 168.020639][ C0] rcu_sched_clock_irq+0xe25/0x1ad0 [ 168.025822][ C0] ? trace_hardirqs_off+0x74/0x80 [ 168.030822][ C0] update_process_times+0x12d/0x180 [ 168.036006][ C0] tick_sched_timer+0x263/0x420 [ 168.040956][ C0] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 168.046569][ C0] __hrtimer_run_queues+0x403/0x840 [ 168.051841][ C0] hrtimer_interrupt+0x38c/0xda0 [ 168.058605][ C0] ? debug_smp_processor_id+0x9/0x20 [ 168.065576][ C0] smp_apic_timer_interrupt+0x109/0x280 [ 168.071965][ C0] apic_timer_interrupt+0xf/0x20 [ 168.080545][ C0] [ 168.083487][ C0] RIP: 0010:free_thread_stack+0x13d/0x590 [ 168.090831][ C0] Code: 00 00 e8 06 a2 60 00 e9 5d 04 00 00 e8 5c 2d 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 [ 168.117523][ C0] RSP: 0018:ffffc90001e07bd0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 168.129271][ C0] RAX: 0000000000000001 RBX: ffffea000251a700 RCX: 0000000000000000 [ 168.142795][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea000251a700 [ 168.154936][ C0] RBP: ffffc90001e07c08 R08: 000000000003a768 R09: ffffed10144b76d7 [ 168.163992][ C0] R10: ffffed10144b76d7 R11: 0000000000000000 R12: ffff88809494f220 [ 168.173597][ C0] R13: dffffc0000000000 R14: 1ffff11012929e44 R15: ffff8880a25bb6a8 [ 168.182792][ C0] put_task_stack+0xa3/0x130 [ 168.187705][ C0] finish_task_switch+0x3f1/0x550 [ 168.193315][ C0] __schedule+0x9a8/0xcc0 [ 168.198332][ C0] schedule+0x181/0x210 [ 168.202518][ C0] do_nanosleep+0x1d0/0x6c0 [ 168.207053][ C0] hrtimer_nanosleep+0x3a6/0x5b0 [ 168.212777][ C0] ? trace_hrtimer_expire_exit+0x2d0/0x2d0 [ 168.219017][ C0] __x64_sys_nanosleep+0x186/0x1d0 [ 168.224129][ C0] do_syscall_64+0xf7/0x1c0 [ 168.228813][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 168.236048][ C0] RIP: 0033:0x458b20 [ 168.240132][ C0] Code: c0 5b 5d c3 66 0f 1f 44 00 00 8b 04 24 48 83 c4 18 5b 5d c3 66 0f 1f 44 00 00 83 3d 11 fe 61 00 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 d4 d1 fb ff c3 48 83 ec 08 e8 ea 46 00 00 [ 168.259845][ C0] RSP: 002b:00007ffe0b44eac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 [ 168.268519][ C0] RAX: ffffffffffffffda RBX: 000000000000f561 RCX: 0000000000458b20 [ 168.276613][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffe0b44ead0 [ 168.284757][ C0] RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000001084940 [ 168.293080][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 168.301217][ C0] R13: 00007ffe0b44eb20 R14: 000000000000f559 R15: 00007ffe0b44eb30