[ 36.043884] audit: type=1800 audit(1568791491.354:32): pid=7270 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 36.702252] audit: type=1800 audit(1568791492.114:33): pid=7270 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.3' (ECDSA) to the list of known hosts. syzkaller login: [ 1163.626235] kauditd_printk_skb: 2 callbacks suppressed [ 1163.626250] audit: type=1400 audit(1568792619.044:36): avc: denied { map } for pid=7458 comm="syz-executor812" path="/root/syz-executor812743655" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 1163.669840] IPVS: ftp: loaded support on port[0] = 21 [ 1163.730971] chnl_net:caif_netlink_parms(): no params data found [ 1163.761415] bridge0: port 1(bridge_slave_0) entered blocking state [ 1163.768063] bridge0: port 1(bridge_slave_0) entered disabled state [ 1163.775814] device bridge_slave_0 entered promiscuous mode [ 1163.782733] bridge0: port 2(bridge_slave_1) entered blocking state [ 1163.789202] bridge0: port 2(bridge_slave_1) entered disabled state [ 1163.796169] device bridge_slave_1 entered promiscuous mode [ 1163.810967] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 1163.820302] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 1163.835144] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 1163.842588] team0: Port device team_slave_0 added [ 1163.848037] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 1163.855406] team0: Port device team_slave_1 added [ 1163.860537] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 1163.867856] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 1163.946835] device hsr_slave_0 entered promiscuous mode [ 1164.005044] device hsr_slave_1 entered promiscuous mode [ 1164.045189] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 1164.052087] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 1164.065526] bridge0: port 2(bridge_slave_1) entered blocking state [ 1164.071918] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1164.078880] bridge0: port 1(bridge_slave_0) entered blocking state [ 1164.085288] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1164.113617] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 1164.120458] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1164.128554] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 1164.137842] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1164.157425] bridge0: port 1(bridge_slave_0) entered disabled state [ 1164.164506] bridge0: port 2(bridge_slave_1) entered disabled state [ 1164.171844] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1164.182690] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 1164.189100] 8021q: adding VLAN 0 to HW filter on device team0 [ 1164.197942] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1164.205696] bridge0: port 1(bridge_slave_0) entered blocking state [ 1164.212032] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1164.226664] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1164.234268] bridge0: port 2(bridge_slave_1) entered blocking state [ 1164.240650] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1164.248361] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1164.256306] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1164.266330] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1164.276381] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1164.287183] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 1164.298189] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 1164.304179] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 1164.311234] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1164.322444] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 1164.332155] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1164.342440] audit: type=1400 audit(1568792619.754:37): avc: denied { associate } for pid=7459 comm="syz-executor812" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1630.064905] INFO: task syz-executor812:7748 blocked for more than 140 seconds. [ 1630.073478] Not tainted 4.19.73 #0 [ 1630.078060] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1630.087425] syz-executor812 D29512 7748 7459 0x00000000 [ 1630.093206] Call Trace: [ 1630.100957] __schedule+0x866/0x1dc0 [ 1630.106095] ? pci_mmcfg_check_reserved+0x170/0x170 [ 1630.111226] ? mark_held_locks+0x100/0x100 [ 1630.116803] ? __percpu_ref_switch_mode+0x34b/0x750 [ 1630.121899] schedule+0x92/0x1c0 [ 1630.126722] schedule_timeout+0x8c8/0xfc0 [ 1630.130945] ? wait_for_completion+0x294/0x440 [ 1630.135919] ? find_held_lock+0x35/0x130 [ 1630.140055] ? usleep_range+0x170/0x170 [ 1630.144127] ? _raw_spin_unlock_irq+0x28/0x90 [ 1630.150094] ? wait_for_completion+0x294/0x440 [ 1630.155021] ? _raw_spin_unlock_irq+0x28/0x90 [ 1630.159588] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1630.164288] ? trace_hardirqs_on+0x67/0x220 [ 1630.170089] ? kasan_check_read+0x11/0x20 [ 1630.174323] wait_for_completion+0x29c/0x440 [ 1630.179205] ? wait_for_completion_interruptible+0x4b0/0x4b0 [ 1630.186437] ? wake_up_q+0x100/0x100 [ 1630.190233] ? kasan_check_read+0x11/0x20 [ 1630.194502] __x64_sys_io_destroy+0x373/0x420 [ 1630.199392] ? __x32_compat_sys_io_setup+0x410/0x410 [ 1630.204605] ? do_syscall_64+0x26/0x620 [ 1630.210074] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1630.214723] ? trace_hardirqs_on+0x67/0x220 [ 1630.219527] do_syscall_64+0xfd/0x620 [ 1630.223396] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1630.229971] RIP: 0033:0x443309 [ 1630.233230] Code: e8 1c 0d 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 1630.254532] RSP: 002b:00007ffe720add68 EFLAGS: 00000246 ORIG_RAX: 00000000000000cf [ 1630.262607] RAX: ffffffffffffffda RBX: 0000000000000064 RCX: 0000000000443309 [ 1630.271420] RDX: 0000000000443309 RSI: 0000000000000000 RDI: 00007ffbec3a5000 [ 1630.278994] RBP: 0000000000000000 R08: 00000000004aa947 R09: 00000000004aa947 [ 1630.287627] R10: 000000000000001c R11: 0000000000000246 R12: 0000000000000046 [ 1630.295195] R13: 0000000000403f80 R14: 0000000000000000 R15: 0000000000000000 [ 1630.302550] [ 1630.302550] Showing all locks held in the system: [ 1630.310274] 1 lock held by khungtaskd/1037: [ 1630.314652] #0: 0000000020170b6c (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e [ 1630.323636] 1 lock held by rsyslogd/7308: [ 1630.329153] #0: 0000000097a0b5c6 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 1630.337421] 2 locks held by getty/7430: [ 1630.341449] #0: 00000000e72203cc (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1630.351087] #1: 000000009228a535 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1630.360392] 2 locks held by getty/7431: [ 1630.364420] #0: 00000000e6d0335d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1630.374069] #1: 00000000a15f2bff (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1630.384109] 2 locks held by getty/7432: [ 1630.389437] #0: 000000007216149d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1630.398013] #1: 0000000003722e17 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1630.408261] 2 locks held by getty/7433: [ 1630.412302] #0: 00000000382fcc57 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1630.420958] #1: 0000000027e538e1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1630.431287] 2 locks held by getty/7434: [ 1630.435549] #0: 00000000394d9614 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1630.443892] #1: 00000000e9082120 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1630.454174] 2 locks held by getty/7435: [ 1630.458454] #0: 000000003263dec9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1630.468102] #1: 00000000b13ac7ec (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1630.477285] 2 locks held by getty/7436: [ 1630.481317] #0: 0000000094be6fef (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1630.490954] #1: 00000000eaf521a7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1630.500258] [ 1630.501949] ============================================= [ 1630.501949] [ 1630.511184] NMI backtrace for cpu 0 [ 1630.514878] CPU: 0 PID: 1037 Comm: khungtaskd Not tainted 4.19.73 #0 [ 1630.521367] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1630.530716] Call Trace: [ 1630.533375] dump_stack+0x172/0x1f0 [ 1630.537015] nmi_cpu_backtrace.cold+0x63/0xa4 [ 1630.541543] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 1630.546478] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 1630.551761] arch_trigger_cpumask_backtrace+0x14/0x20 [ 1630.556999] watchdog+0x9df/0xee0 [ 1630.560514] kthread+0x354/0x420 [ 1630.563885] ? reset_hung_task_detector+0x30/0x30 [ 1630.568825] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 1630.574394] ret_from_fork+0x24/0x30 [ 1630.578251] Sending NMI from CPU 0 to CPUs 1: [ 1630.583080] NMI backtrace for cpu 1 [ 1630.583085] CPU: 1 PID: 7749 Comm: syz-executor812 Not tainted 4.19.73 #0 [ 1630.583091] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1630.583094] RIP: 0010:__x64_sys_wait4+0x2a/0xf0 [ 1630.583105] Code: 55 48 89 e5 53 48 89 fb 48 83 ec 18 e8 6f 0e 2b 00 48 8d 7b 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <75> 72 48 8d 7b 60 48 8b 4b 38 48 b8 00 00 00 00 00 fc ff df 48 89 [ 1630.583109] RSP: 0018:ffff8880a8ff7ef0 EFLAGS: 00000246 [ 1630.583116] RAX: dffffc0000000000 RBX: ffff8880a8ff7f58 RCX: ffffffff8100a205 [ 1630.583121] RDX: 1ffff110151feff2 RSI: ffffffff81405431 RDI: ffff8880a8ff7f90 [ 1630.583125] RBP: ffff8880a8ff7f10 R08: ffff888098bea540 R09: 0000000000000000 [ 1630.583130] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a8ff7f58 [ 1630.583135] R13: ffffffff88724618 R14: 0000000000000000 R15: 0000000000000000 [ 1630.583140] FS: 000000000193f880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 1630.583144] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1630.583149] CR2: 00000000006dcb24 CR3: 0000000092847000 CR4: 00000000001406e0 [ 1630.583153] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1630.583158] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1630.583161] Call Trace: [ 1630.583164] do_syscall_64+0xfd/0x620 [ 1630.583167] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1630.583170] RIP: 0033:0x402f3a [ 1630.583180] Code: c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 8b 05 fe 9b 2d 00 85 c0 75 36 45 31 d2 48 63 d2 48 63 ff b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 d0 ff ff ff f7 [ 1630.583184] RSP: 002b:00007ffe720add50 EFLAGS: 00000246 ORIG_RAX: 000000000000003d [ 1630.583192] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000402f3a [ 1630.583197] RDX: 0000000040000000 RSI: 00007ffe720add5c RDI: ffffffffffffffff [ 1630.583201] RBP: 0000000000000000 R08: 00000000004aa947 R09: 00000000004aa947 [ 1630.583206] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000046 [ 1630.583211] R13: 0000000000403f80 R14: 0000000000000000 R15: 0000000000000000 [ 1630.586389] Kernel panic - not syncing: hung_task: blocked tasks [ 1630.788349] CPU: 0 PID: 1037 Comm: khungtaskd Not tainted 4.19.73 #0 [ 1630.794836] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1630.804192] Call Trace: [ 1630.806796] dump_stack+0x172/0x1f0 [ 1630.810430] panic+0x263/0x507 [ 1630.813622] ? __warn_printk+0xf3/0xf3 [ 1630.817514] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 1630.822450] ? ___preempt_schedule+0x16/0x18 [ 1630.826865] ? nmi_trigger_cpumask_backtrace+0x165/0x1f8 [ 1630.832319] ? nmi_trigger_cpumask_backtrace+0x1c1/0x1f8 [ 1630.837875] ? nmi_trigger_cpumask_backtrace+0x1cb/0x1f8 [ 1630.843332] ? nmi_trigger_cpumask_backtrace+0x165/0x1f8 [ 1630.848793] watchdog+0x9f0/0xee0 [ 1630.852264] kthread+0x354/0x420 [ 1630.855634] ? reset_hung_task_detector+0x30/0x30 [ 1630.860479] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 1630.866042] ret_from_fork+0x24/0x30 [ 1630.871361] Kernel Offset: disabled [ 1630.874992] Rebooting in 86400 seconds..