[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 45.478139][ T25] audit: type=1800 audit(1575430824.181:25): pid=8219 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 45.497684][ T25] audit: type=1800 audit(1575430824.181:26): pid=8219 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 45.517402][ T25] audit: type=1800 audit(1575430824.181:27): pid=8219 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 '10.128.15.201' (ECDSA) to the list of known hosts. 2019/12/04 03:40:35 fuzzer started 2019/12/04 03:40:37 dialing manager at 10.128.0.26:42111 2019/12/04 03:40:37 syscalls: 2689 2019/12/04 03:40:37 code coverage: enabled 2019/12/04 03:40:37 comparison tracing: enabled 2019/12/04 03:40:37 extra coverage: extra coverage is not supported by the kernel 2019/12/04 03:40:37 setuid sandbox: enabled 2019/12/04 03:40:37 namespace sandbox: enabled 2019/12/04 03:40:37 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/04 03:40:37 fault injection: enabled 2019/12/04 03:40:37 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/04 03:40:37 net packet injection: enabled 2019/12/04 03:40:37 net device setup: enabled 2019/12/04 03:40:37 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/04 03:40:37 devlink PCI setup: PCI device 0000:00:10.0 is not available 03:40:38 executing program 0: r0 = socket$inet6_icmp_raw(0xa, 0x3, 0x3a) setsockopt$inet6_MRT6_DEL_MFC(r0, 0x29, 0xcb, 0x0, 0x0) 03:40:38 executing program 1: r0 = open(&(0x7f0000000380)='./bus\x00', 0x143042, 0x0) ftruncate(r0, 0x2008002) r1 = socket$inet6(0xa, 0x400000000001, 0x0) close(r1) socket$xdp(0x2c, 0x3, 0x0) r2 = open(&(0x7f0000000380)='./bus\x00', 0x0, 0x0) sendfile(r1, r2, 0x0, 0x8000fffffffe) syzkaller login: [ 59.675353][ T8382] IPVS: ftp: loaded support on port[0] = 21 [ 59.834812][ T8382] chnl_net:caif_netlink_parms(): no params data found [ 59.883162][ T8382] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.891142][ T8382] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.900830][ T8382] device bridge_slave_0 entered promiscuous mode [ 59.911574][ T8382] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.918806][ T8382] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.928018][ T8382] device bridge_slave_1 entered promiscuous mode [ 59.953733][ T8382] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.966600][ T8382] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.993387][ T8382] team0: Port device team_slave_0 added 03:40:38 executing program 2: ioctl$RTC_SET_TIME(0xffffffffffffffff, 0x4024700a, &(0x7f0000000000)={0x802d, 0x23, 0x2}) r0 = syz_open_dev$dri(&(0x7f0000000040)='/dev/dri/card#\x00', 0x0, 0x0) ioctl(r0, 0xffffffffffffffb2, &(0x7f0000000000)) perf_event_open(0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0) perf_event_open(&(0x7f000001d000)={0x1, 0x70, 0x0, 0x0, 0x0, 0x0, 0x0, 0x41c1, 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, 0xffffffffffffffff, 0xffffffffffffffff, 0x0) r1 = socket$inet(0x10, 0x3, 0x0) dup2(r1, r0) [ 59.994827][ T8385] IPVS: ftp: loaded support on port[0] = 21 [ 60.002384][ T8382] team0: Port device team_slave_1 added [ 60.072581][ T8382] device hsr_slave_0 entered promiscuous mode [ 60.159977][ T8382] device hsr_slave_1 entered promiscuous mode 03:40:38 executing program 3: r0 = socket$key(0xf, 0x3, 0x2) sendmsg$key(r0, &(0x7f0000cd0fc8)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000380)={0x2, 0xd, 0x0, 0x0, 0x18, 0x0, 0x0, 0x0, [@sadb_lifetime={0x4, 0x4}, @sadb_x_policy={0x8, 0x12, 0x2, 0x3, 0x0, 0x0, 0x0, {0x6, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @in=@multicast2, @in=@multicast1}}, @sadb_address={0x5, 0x5, 0x0, 0x0, 0x0, @in6={0xa, 0x0, 0x0, @ipv4={[], [], @dev}}}, @sadb_address={0x5, 0x6, 0x0, 0x0, 0x0, @in6={0xa, 0x0, 0x0, @remote={0xfe, 0x80, [], 0xffffffffffffffff}}}]}, 0xc0}}, 0x0) [ 60.237200][ T8387] IPVS: ftp: loaded support on port[0] = 21 [ 60.396361][ T8382] netdevsim netdevsim0 netdevsim0: renamed from eth0 03:40:39 executing program 4: r0 = syz_open_dev$video(&(0x7f0000000000)='/dev/video#\x00', 0x9, 0x0) ioctl$VIDIOC_G_TUNER(r0, 0xc054561d, &(0x7f0000000180)={0xd25, "bbe068ff3d4af52a8d98078ecbc7f67716f85f58cadf37c9e04f4c51044ad0b7"}) [ 60.505465][ T8382] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 60.611295][ T8382] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 60.653127][ T8382] netdevsim netdevsim0 netdevsim3: renamed from eth3 03:40:39 executing program 5: r0 = socket$inet6(0xa, 0x80003, 0x81) ioctl(r0, 0x1000008912, &(0x7f0000000000)="0815b5055e0bcfe87b3071") r1 = socket(0x42000000015, 0x805, 0x0) getsockopt(r1, 0x114, 0x2713, &(0x7f0000af0fe7)=""/13, &(0x7f0000000000)=0x7ffff000) r2 = socket(0x42000000015, 0x805, 0x0) getsockopt(r2, 0x114, 0x2713, &(0x7f0000af0fe7)=""/13, &(0x7f0000000000)=0x7ffff000) [ 60.756001][ T8389] IPVS: ftp: loaded support on port[0] = 21 [ 60.776233][ T8393] IPVS: ftp: loaded support on port[0] = 21 [ 60.793730][ T8385] chnl_net:caif_netlink_parms(): no params data found [ 60.815641][ T8382] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.823130][ T8382] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.831343][ T8382] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.838909][ T8382] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.908882][ T2995] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.919013][ T2995] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.936194][ T8387] chnl_net:caif_netlink_parms(): no params data found [ 60.965265][ T8385] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.972737][ T8385] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.981504][ T8385] device bridge_slave_0 entered promiscuous mode [ 61.024197][ T8385] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.031669][ T8385] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.039725][ T8385] device bridge_slave_1 entered promiscuous mode [ 61.060471][ T8385] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.074888][ T8385] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.091897][ T8387] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.099250][ T8387] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.107279][ T8387] device bridge_slave_0 entered promiscuous mode [ 61.117963][ T8387] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.125137][ T8387] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.133503][ T8387] device bridge_slave_1 entered promiscuous mode [ 61.168621][ T8387] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.188202][ T8396] IPVS: ftp: loaded support on port[0] = 21 [ 61.210866][ T8382] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.219125][ T8387] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.261152][ T8385] team0: Port device team_slave_0 added [ 61.269366][ T8385] team0: Port device team_slave_1 added [ 61.278588][ T8387] team0: Port device team_slave_0 added [ 61.331026][ T8382] 8021q: adding VLAN 0 to HW filter on device team0 [ 61.355269][ T8387] team0: Port device team_slave_1 added [ 61.386383][ T2995] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 61.394929][ T2995] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 61.403726][ T2995] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 61.412512][ T2995] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 61.421147][ T2995] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.428358][ T2995] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.436339][ T2995] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 61.445971][ T2995] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.454530][ T2995] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.461647][ T2995] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.532735][ T8387] device hsr_slave_0 entered promiscuous mode [ 61.580190][ T8387] device hsr_slave_1 entered promiscuous mode [ 61.620457][ T8387] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.629365][ T8389] chnl_net:caif_netlink_parms(): no params data found [ 61.647489][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 61.657697][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 61.691602][ T8393] chnl_net:caif_netlink_parms(): no params data found [ 61.701175][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 61.710431][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 61.719255][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 61.728843][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 61.737733][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 61.746280][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 61.792470][ T8385] device hsr_slave_0 entered promiscuous mode [ 61.830258][ T8385] device hsr_slave_1 entered promiscuous mode [ 61.879829][ T8385] debugfs: Directory 'hsr0' with parent '/' already present! [ 61.912401][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 61.925577][ T8382] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 61.964199][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 61.972807][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 62.017418][ T8400] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 62.025996][ T8400] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 62.037229][ T8393] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.046683][ T8393] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.055832][ T8393] device bridge_slave_0 entered promiscuous mode [ 62.066650][ T8393] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.075029][ T8393] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.083453][ T8393] device bridge_slave_1 entered promiscuous mode [ 62.091040][ T8389] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.098104][ T8389] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.108121][ T8389] device bridge_slave_0 entered promiscuous mode [ 62.117249][ T8387] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 62.183609][ T8387] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 62.237377][ T8387] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 62.273248][ T8389] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.281174][ T8389] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.289028][ T8389] device bridge_slave_1 entered promiscuous mode [ 62.302200][ T8385] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 62.363072][ T8385] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 62.418261][ T8387] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 62.474629][ T8382] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 62.507074][ T8393] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.519727][ T8393] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.528893][ T8385] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 62.582534][ T8385] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 62.652164][ T8389] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.690259][ T8396] chnl_net:caif_netlink_parms(): no params data found [ 62.702652][ T8389] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.737128][ T8393] team0: Port device team_slave_0 added [ 62.795220][ T8389] team0: Port device team_slave_0 added [ 62.804544][ T8393] team0: Port device team_slave_1 added [ 62.868189][ T8387] 8021q: adding VLAN 0 to HW filter on device bond0 [ 62.895110][ T8387] 8021q: adding VLAN 0 to HW filter on device team0 [ 62.951423][ T8389] team0: Port device team_slave_1 added [ 167.929528][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 167.936300][ C1] rcu: 1-...!: (1 GPs behind) idle=90e/1/0x4000000000000002 softirq=11501/11502 fqs=136 [ 167.946356][ C1] (t=10500 jiffies g=6689 q=512) [ 167.951410][ C1] rcu: rcu_preempt kthread starved for 10215 jiffies! g6689 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 167.962582][ C1] rcu: RCU grace-period kthread stack dump: [ 167.968557][ C1] rcu_preempt R running task 29032 10 2 0x80004000 [ 167.976454][ C1] Call Trace: [ 167.979748][ C1] __schedule+0x9a0/0xcc0 [ 167.984074][ C1] schedule+0x181/0x210 [ 167.988218][ C1] schedule_timeout+0x14f/0x240 [ 167.993058][ C1] ? run_local_timers+0x120/0x120 [ 167.998073][ C1] rcu_gp_kthread+0xed8/0x1770 [ 168.002830][ C1] kthread+0x332/0x350 [ 168.006885][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 168.012420][ C1] ? kthread_blkcg+0xe0/0xe0 [ 168.017006][ C1] ret_from_fork+0x24/0x30 [ 168.021429][ C1] NMI backtrace for cpu 1 [ 168.025746][ C1] CPU: 1 PID: 8403 Comm: syz-executor.0 Not tainted 5.4.0-syzkaller #0 [ 168.034066][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 168.044130][ C1] Call Trace: [ 168.047412][ C1] [ 168.050258][ C1] dump_stack+0x1fb/0x318 [ 168.054580][ C1] nmi_cpu_backtrace+0xaf/0x1a0 [ 168.059426][ C1] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 168.065570][ C1] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 168.071626][ C1] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 168.077605][ C1] arch_trigger_cpumask_backtrace+0x10/0x20 [ 168.083483][ C1] rcu_dump_cpu_stacks+0x15a/0x220 [ 168.088595][ C1] rcu_sched_clock_irq+0xe25/0x1ad0 [ 168.093785][ C1] ? trace_hardirqs_off+0x74/0x80 [ 168.098805][ C1] update_process_times+0x12d/0x180 [ 168.103992][ C1] tick_sched_timer+0x263/0x420 [ 168.108831][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 168.114377][ C1] __hrtimer_run_queues+0x403/0x840 [ 168.119586][ C1] hrtimer_interrupt+0x38c/0xda0 [ 168.124538][ C1] ? debug_smp_processor_id+0x9/0x20 [ 168.129811][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 168.135431][ C1] apic_timer_interrupt+0xf/0x20 [ 168.140352][ C1] [ 168.143284][ C1] RIP: 0010:mod_memcg_page_state+0x168/0x190 [ 168.149249][ C1] Code: c7 28 96 0a 89 e8 a8 9e 69 00 48 83 3d c8 21 c2 07 00 74 2d e8 99 27 2e 00 4c 89 ff 57 9d 0f 1f 44 00 00 5b 41 5c 41 5e 41 5f <5d> c3 e8 81 27 2e 00 0f 0b e8 7a 27 2e 00 0f 0b e8 73 27 2e 00 0f [ 168.169471][ C1] RSP: 0000:ffffc900025c7a38 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 168.178044][ C1] RAX: ffffffff81487433 RBX: ffff88806c676f08 RCX: ffff88808d494100 [ 168.186003][ C1] RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea0001b19e00 [ 168.193959][ C1] RBP: ffffc900025c7a38 R08: 000000000003a768 R09: ffffed10152d66af [ 168.201919][ C1] R10: ffffed10152d66af R11: 0000000000000000 R12: ffff88806c676fa0 [ 168.210229][ C1] R13: dffffc0000000000 R14: 1ffff1100d8cedf4 R15: ffff8880a96b3568 [ 168.218203][ C1] ? mod_memcg_page_state+0x123/0x190 [ 168.223567][ C1] free_thread_stack+0x168/0x590 [ 168.228495][ C1] put_task_stack+0xa3/0x130 [ 168.233098][ C1] finish_task_switch+0x3f1/0x550 [ 168.238116][ C1] __schedule+0x9a8/0xcc0 [ 168.242445][ C1] ? ___preempt_schedule+0x16/0x18 [ 168.247564][ C1] preempt_schedule+0xdb/0x120 [ 168.252323][ C1] ___preempt_schedule+0x16/0x18 [ 168.257263][ C1] _raw_spin_unlock+0x3a/0x40 [ 168.261926][ C1] do_anonymous_page+0x13e8/0x1610 [ 168.267037][ C1] handle_mm_fault+0x1bce/0x2890 [ 168.272000][ C1] do_user_addr_fault+0x589/0xaf0 [ 168.277018][ C1] __do_page_fault+0xd3/0x1f0 [ 168.281680][ C1] do_page_fault+0x99/0xb0 [ 168.286087][ C1] page_fault+0x39/0x40 [ 168.290624][ C1] RIP: 0033:0x40d827 [ 168.294509][ C1] Code: 8c 02 50 bf 75 00 48 83 c0 08 48 83 f8 48 75 e6 49 63 c6 0f b6 4c 24 5b 48 69 c0 a8 00 00 00 88 88 c0 bf 75 00 e8 99 59 ff ff <83> 05 d6 27 55 00 01 80 7c 24 59 00 74 0b f6 44 24 18 01 0f 84 e5 [ 168.314194][ C1] RSP: 002b:00007ffe08883c10 EFLAGS: 00010217 [ 168.320344][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000045a679 [ 168.328408][ C1] RDX: 0000000000000000 RSI: 0000000000000081 RDI: 000000000075bf28 [ 168.336365][ C1] RBP: 000000000075bf2c R08: 00007f9b1b71f700 R09: ffffffffffffffff [ 168.344323][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf20 [ 168.352283][ C1] R13: 0000000000000003 R14: 0000000000000000 R15: 000000000075bf2c