[ 44.006896][ T23] audit: type=1800 audit(1575421510.585:26): pid=8055 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 44.061285][ T23] audit: type=1800 audit(1575421510.595:27): pid=8055 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 44.099650][ T23] audit: type=1800 audit(1575421510.595:28): pid=8055 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. [ 44.717359][ T23] audit: type=1800 audit(1575421511.325:29): pid=8055 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 '10.128.0.98' (ECDSA) to the list of known hosts. 2019/12/04 01:05:18 fuzzer started 2019/12/04 01:05:20 dialing manager at 10.128.0.26:42111 2019/12/04 01:05:20 syscalls: 2689 2019/12/04 01:05:20 code coverage: enabled 2019/12/04 01:05:20 comparison tracing: enabled 2019/12/04 01:05:20 extra coverage: extra coverage is not supported by the kernel 2019/12/04 01:05:20 setuid sandbox: enabled 2019/12/04 01:05:20 namespace sandbox: enabled 2019/12/04 01:05:20 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/04 01:05:20 fault injection: enabled 2019/12/04 01:05:20 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/04 01:05:20 net packet injection: enabled 2019/12/04 01:05:20 net device setup: enabled 2019/12/04 01:05:20 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2019/12/04 01:05:20 devlink PCI setup: PCI device 0000:00:10.0 is not available 01:05:21 executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendmsg$nl_generic(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f0000000080)={&(0x7f0000000140)=ANY=[@ANYBLOB="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"], 0x2c}}, 0x0) 01:05:21 executing program 1: unshare(0x8000400) socketpair$unix(0x1, 0x1, 0x0, &(0x7f0000000000)={0xffffffffffffffff, 0xffffffffffffffff}) r2 = dup2(r1, r0) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) r3 = socket$inet_dccp(0x2, 0x6, 0x0) getsockopt$inet_int(r3, 0x10d, 0xb5, &(0x7f0000000140), &(0x7f00000000c0)=0x4) syzkaller login: [ 54.805690][ T8217] IPVS: ftp: loaded support on port[0] = 21 [ 54.944593][ T8217] chnl_net:caif_netlink_parms(): no params data found [ 54.963604][ T8219] IPVS: ftp: loaded support on port[0] = 21 01:05:21 executing program 2: r0 = socket(0x10, 0x2, 0x0) getsockopt$sock_cred(r0, 0x1, 0x11, &(0x7f0000caaffb)={0x0, 0x0, 0x0}, &(0x7f0000cab000)=0xc) setresgid(0xffffffffffffffff, r1, 0x0) r2 = socket$inet_udplite(0x2, 0x2, 0x88) getsockopt$sock_cred(r2, 0x1, 0x11, &(0x7f0000000240)={0x0, 0x0}, &(0x7f0000000280)=0x5) setuid(r3) r4 = socket(0x10, 0x2, 0x0) getsockopt$sock_cred(r4, 0x1, 0x11, &(0x7f0000caaffb)={0x0, 0x0, 0x0}, &(0x7f0000cab000)=0xc) getgroups(0x2, &(0x7f0000000280)=[0xee01, r5]) setresgid(0xffffffffffffffff, 0x0, r6) [ 54.990065][ T8217] bridge0: port 1(bridge_slave_0) entered blocking state [ 54.997802][ T8217] bridge0: port 1(bridge_slave_0) entered disabled state [ 55.006455][ T8217] device bridge_slave_0 entered promiscuous mode [ 55.017013][ T8217] bridge0: port 2(bridge_slave_1) entered blocking state [ 55.024107][ T8217] bridge0: port 2(bridge_slave_1) entered disabled state [ 55.032954][ T8217] device bridge_slave_1 entered promiscuous mode [ 55.062466][ T8217] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 55.075310][ T8217] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 55.120392][ T8217] team0: Port device team_slave_0 added [ 55.140197][ T8217] team0: Port device team_slave_1 added 01:05:21 executing program 3: bpf$PROG_LOAD(0x5, &(0x7f0000000180)={0x10, 0x4, &(0x7f0000000000)=@framed={{}, [@call={0x61, 0x11, 0x28}]}, &(0x7f00000000c0)='GPL\x00', 0x4, 0x1000, &(0x7f0000000200)=""/4096, 0x0, 0x0, [], 0x0, 0x0, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0}, 0x70) [ 55.229564][ T8217] device hsr_slave_0 entered promiscuous mode [ 55.287921][ T8217] device hsr_slave_1 entered promiscuous mode [ 55.373427][ T8222] IPVS: ftp: loaded support on port[0] = 21 01:05:22 executing program 4: r0 = syz_open_dev$dri(&(0x7f0000000140)='/dev/dri/card#\x00', 0x1, 0x0) getsockopt$inet_sctp6_SCTP_DEFAULT_SEND_PARAM(0xffffffffffffffff, 0x84, 0xa, &(0x7f0000000080)={0x0, 0x0, 0x0, 0x0, 0x0, 0x100000001}, 0x0) ioctl(r0, 0xffffffffffffffaa, &(0x7f0000000080)) [ 55.456320][ T8219] chnl_net:caif_netlink_parms(): no params data found [ 55.479970][ T8217] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 55.563670][ T8225] IPVS: ftp: loaded support on port[0] = 21 [ 55.579994][ T8217] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 55.648715][ T8217] netdevsim netdevsim0 netdevsim2: renamed from eth2 01:05:22 executing program 5: r0 = syz_open_procfs(0x0, &(0x7f00000002c0)='net/ptype\x00\xcc\xf8V\xfe~\xdc\x94\x8e\xf06Ff\x00\xab\xa5\xd6\xeaY\xc8\xb5F\xfa\xa1\xd2\xc4*,ZT') preadv(r0, &(0x7f0000001400)=[{&(0x7f0000000180)=""/184, 0xb8}], 0x1, 0x1a) [ 55.718588][ T8217] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 55.776436][ T8227] IPVS: ftp: loaded support on port[0] = 21 [ 55.822871][ T8219] bridge0: port 1(bridge_slave_0) entered blocking state [ 55.830436][ T8219] bridge0: port 1(bridge_slave_0) entered disabled state [ 55.840026][ T8219] device bridge_slave_0 entered promiscuous mode [ 55.850522][ T8219] bridge0: port 2(bridge_slave_1) entered blocking state [ 55.859604][ T8219] bridge0: port 2(bridge_slave_1) entered disabled state [ 55.867534][ T8219] device bridge_slave_1 entered promiscuous mode [ 55.889070][ T8219] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 55.901724][ T8219] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 55.925199][ T8217] bridge0: port 2(bridge_slave_1) entered blocking state [ 55.932417][ T8217] bridge0: port 2(bridge_slave_1) entered forwarding state [ 55.940276][ T8217] bridge0: port 1(bridge_slave_0) entered blocking state [ 55.947401][ T8217] bridge0: port 1(bridge_slave_0) entered forwarding state [ 55.987862][ T8230] IPVS: ftp: loaded support on port[0] = 21 [ 56.004979][ T8219] team0: Port device team_slave_0 added [ 56.013467][ T8219] team0: Port device team_slave_1 added [ 56.020757][ T3065] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.029283][ T3065] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.042785][ T8222] chnl_net:caif_netlink_parms(): no params data found [ 56.129769][ T8219] device hsr_slave_0 entered promiscuous mode [ 56.177211][ T8219] device hsr_slave_1 entered promiscuous mode [ 56.226959][ T8219] debugfs: Directory 'hsr0' with parent '/' already present! [ 56.273905][ T8222] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.282174][ T8222] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.291463][ T8222] device bridge_slave_0 entered promiscuous mode [ 56.306272][ T8217] 8021q: adding VLAN 0 to HW filter on device bond0 [ 56.330160][ T8222] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.337646][ T8222] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.345545][ T8222] device bridge_slave_1 entered promiscuous mode [ 56.364148][ T8222] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 56.391757][ T8219] netdevsim netdevsim1 netdevsim0: renamed from eth0 [ 56.460992][ T8222] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 56.495792][ T8219] netdevsim netdevsim1 netdevsim1: renamed from eth1 [ 56.538963][ T8219] netdevsim netdevsim1 netdevsim2: renamed from eth2 [ 56.617532][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 56.625743][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 56.640630][ T8217] 8021q: adding VLAN 0 to HW filter on device team0 [ 56.648343][ T8219] netdevsim netdevsim1 netdevsim3: renamed from eth3 [ 56.687119][ T8225] chnl_net:caif_netlink_parms(): no params data found [ 56.741775][ T8222] team0: Port device team_slave_0 added [ 56.753345][ T8222] team0: Port device team_slave_1 added [ 56.759646][ T8225] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.766703][ T8225] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.774743][ T8225] device bridge_slave_0 entered promiscuous mode [ 56.782221][ T8227] chnl_net:caif_netlink_parms(): no params data found [ 56.793923][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 56.802985][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 56.811596][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.818827][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 56.836166][ T8230] chnl_net:caif_netlink_parms(): no params data found [ 56.847834][ T8225] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.854910][ T8225] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.864780][ T8225] device bridge_slave_1 entered promiscuous mode [ 56.921768][ T8229] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 56.930797][ T8229] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 56.939276][ T8229] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.946323][ T8229] bridge0: port 2(bridge_slave_1) entered forwarding state [ 56.964402][ T8225] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 56.983731][ T8230] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.991999][ T8230] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.000297][ T8230] device bridge_slave_0 entered promiscuous mode [ 57.059551][ T8222] device hsr_slave_0 entered promiscuous mode [ 57.097615][ T8222] device hsr_slave_1 entered promiscuous mode [ 57.146897][ T8222] debugfs: Directory 'hsr0' with parent '/' already present! [ 57.160740][ T8225] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.189969][ T8225] team0: Port device team_slave_0 added [ 57.195900][ T8230] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.203095][ T8230] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.212393][ T8230] device bridge_slave_1 entered promiscuous mode [ 57.221288][ T3815] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 57.243667][ T8227] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.251651][ T8227] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.259630][ T8227] device bridge_slave_0 entered promiscuous mode [ 57.267982][ T8225] team0: Port device team_slave_1 added [ 57.273746][ T8227] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.280967][ T8227] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.288945][ T8227] device bridge_slave_1 entered promiscuous mode [ 57.310538][ T8230] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.323097][ T3815] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 57.331796][ T3815] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 57.340467][ T3815] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 57.349406][ T3815] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 57.375383][ T8227] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.386136][ T8227] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.400432][ T8230] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.421638][ T8222] netdevsim netdevsim2 netdevsim0: renamed from eth0 [ 57.461707][ T8222] netdevsim netdevsim2 netdevsim1: renamed from eth1 [ 57.509555][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 57.518925][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 57.527391][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 57.535921][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 57.555083][ T8227] team0: Port device team_slave_0 added [ 57.566717][ T8227] team0: Port device team_slave_1 added [ 57.609589][ T8225] device hsr_slave_0 entered promiscuous mode [ 57.647273][ T8225] device hsr_slave_1 entered promiscuous mode [ 57.687002][ T8225] debugfs: Directory 'hsr0' with parent '/' already present! [ 57.698713][ T8217] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 57.710242][ T8217] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 57.718538][ T8222] netdevsim netdevsim2 netdevsim2: renamed from eth2 [ 57.759102][ T8222] netdevsim netdevsim2 netdevsim3: renamed from eth3 [ 57.806622][ T8230] team0: Port device team_slave_0 added [ 57.815514][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 57.824013][ T8232] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 57.899910][ T8227] device hsr_slave_0 entered promiscuous mode [ 57.947866][ T8227] device hsr_slave_1 entered promiscuous mode [ 58.006898][ T8227] debugfs: Directory 'hsr0' with parent '/' already present! [ 58.015745][ T8230] team0: Port device team_slave_1 added [ 58.036050][ T8217] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 58.058273][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 58.065707][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 58.091018][ T8219] 8021q: adding VLAN 0 to HW filter on device bond0 [ 58.149845][ T8230] device hsr_slave_0 entered promiscuous mode [ 58.188255][ T8230] device hsr_slave_1 entered promiscuous mode [ 58.227357][ T8230] debugfs: Directory 'hsr0' with parent '/' already present! [ 58.260560][ T8225] netdevsim netdevsim3 netdevsim0: renamed from eth0 [ 58.330366][ T8225] netdevsim netdevsim3 netdevsim1: renamed from eth1 [ 58.382215][ T8225] netdevsim netdevsim3 netdevsim2: renamed from eth2 [ 58.442152][ T8225] netdevsim netdevsim3 netdevsim3: renamed from eth3 [ 58.496717][ T8219] 8021q: adding VLAN 0 to HW filter on device team0 [ 58.531727][ T8227] netdevsim netdevsim4 netdevsim0: renamed from eth0 [ 163.556740][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 163.563733][ C1] (detected by 1, t=10502 jiffies, g=6033, q=140) [ 163.570220][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294953501-4294942998), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 163.583558][ C1] syz-executor.0 R running task 24128 8217 8216 0x0000400a [ 163.591445][ C1] Call Trace: [ 163.594713][ C1] [ 163.597563][ C1] sched_show_task+0x40f/0x560 [ 163.602322][ C1] rcu_sched_clock_irq+0x1861/0x1ad0 [ 163.607601][ C1] update_process_times+0x12d/0x180 [ 163.612803][ C1] tick_sched_timer+0x263/0x420 [ 163.617643][ C1] ? tick_setup_sched_timer+0x3d0/0x3d0 [ 163.623174][ C1] __hrtimer_run_queues+0x403/0x840 [ 163.628371][ C1] hrtimer_interrupt+0x38c/0xda0 [ 163.633307][ C1] ? debug_smp_processor_id+0x9/0x20 [ 163.638582][ C1] smp_apic_timer_interrupt+0x109/0x280 [ 163.644114][ C1] apic_timer_interrupt+0xf/0x20 [ 163.649032][ C1] [ 163.651960][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x48/0x50 [ 163.658099][ C1] Code: 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 3a 0f 1f 80 00 00 00 00 4c 8b 04 24 65 48 8b 04 25 c0 1d 02 00 65 [ 163.677703][ C1] RSP: 0018:ffffc90001e87b98 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 163.686120][ C1] RAX: ffffffff81487433 RBX: 0000000000000000 RCX: ffff888088432240 [ 163.694090][ C1] RDX: 0000000000000000 RSI: 00000000fffffffc RDI: ffffea0001b00040 [ 163.702053][ C1] RBP: ffffc90001e87bc0 R08: 000000000003a768 R09: fffffbfff120248a [ 163.710135][ C1] R10: fffffbfff120248a R11: 0000000000000000 R12: dffffc0000000000 [ 163.718102][ C1] R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff8880a85779a8 [ 163.726090][ C1] ? mod_memcg_page_state+0x123/0x190 [ 163.731552][ C1] ? free_thread_stack+0x124/0x590 [ 163.736651][ C1] ? mod_memcg_page_state+0x123/0x190 [ 163.742012][ C1] free_thread_stack+0x168/0x590 [ 163.746938][ C1] put_task_stack+0xa3/0x130 [ 163.751518][ C1] finish_task_switch+0x3f1/0x550 [ 163.756544][ C1] __schedule+0x9a8/0xcc0 [ 163.760871][ C1] schedule+0x181/0x210 [ 163.765014][ C1] do_nanosleep+0x1d0/0x6c0 [ 163.769516][ C1] hrtimer_nanosleep+0x3a6/0x5b0 [ 163.774456][ C1] ? trace_hrtimer_expire_exit+0x2d0/0x2d0 [ 163.780252][ C1] __x64_sys_nanosleep+0x186/0x1d0 [ 163.785353][ C1] do_syscall_64+0xf7/0x1c0 [ 163.789847][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 163.795726][ C1] RIP: 0033:0x458b20 [ 163.799607][ C1] 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 [ 163.819195][ C1] RSP: 002b:00007ffd5878f2d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 [ 163.827709][ C1] RAX: ffffffffffffffda RBX: 000000000000e493 RCX: 0000000000458b20 [ 163.835676][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffd5878f2e0 [ 163.843643][ C1] RBP: 0000000000000002 R08: 0000000000000001 R09: 000000000189f940 [ 163.851607][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 163.859566][ C1] R13: 00007ffd5878f330 R14: 000000000000e48d R15: 00007ffd5878f340 [ 163.867545][ C1] rcu: rcu_preempt kthread starved for 10533 jiffies! g6033 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 163.878624][ C1] rcu: RCU grace-period kthread stack dump: [ 163.884611][ C1] rcu_preempt R running task 29032 10 2 0x80004000 [ 163.892512][ C1] Call Trace: [ 163.895806][ C1] __schedule+0x9a0/0xcc0 [ 163.900137][ C1] schedule+0x181/0x210 [ 163.904282][ C1] schedule_timeout+0x14f/0x240 [ 163.909122][ C1] ? run_local_timers+0x120/0x120 [ 163.914137][ C1] rcu_gp_kthread+0xed8/0x1770 [ 163.918895][ C1] kthread+0x332/0x350 [ 163.922946][ C1] ? rcu_report_qs_rsp+0x140/0x140 [ 163.928041][ C1] ? kthread_blkcg+0xe0/0xe0 [ 163.932631][ C1] ret_from_fork+0x24/0x30