[ 44.692489] audit: type=1800 audit(1550309986.539:29): pid=7894 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 44.721146] audit: type=1800 audit(1550309986.549:30): pid=7894 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?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 '10.128.0.136' (ECDSA) to the list of known hosts. syzkaller login: [ 1248.745627] kauditd_printk_skb: 5 callbacks suppressed [ 1248.745639] audit: type=1400 audit(1550311190.599:36): avc: denied { map } for pid=8080 comm="syz-executor112" path="/root/syz-executor112537967" 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 [ 1248.796408] IPVS: ftp: loaded support on port[0] = 21 [ 1248.854449] chnl_net:caif_netlink_parms(): no params data found [ 1248.884295] bridge0: port 1(bridge_slave_0) entered blocking state [ 1248.891264] bridge0: port 1(bridge_slave_0) entered disabled state [ 1248.898484] device bridge_slave_0 entered promiscuous mode [ 1248.905877] bridge0: port 2(bridge_slave_1) entered blocking state [ 1248.912204] bridge0: port 2(bridge_slave_1) entered disabled state [ 1248.919187] device bridge_slave_1 entered promiscuous mode [ 1248.933745] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 1248.942442] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 1248.958823] team0: Port device team_slave_0 added [ 1248.964814] team0: Port device team_slave_1 added [ 1249.026329] device hsr_slave_0 entered promiscuous mode [ 1249.064617] device hsr_slave_1 entered promiscuous mode [ 1249.113152] bridge0: port 2(bridge_slave_1) entered blocking state [ 1249.119595] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1249.126452] bridge0: port 1(bridge_slave_0) entered blocking state [ 1249.132789] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1249.161723] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1249.172873] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1249.192135] bridge0: port 1(bridge_slave_0) entered disabled state [ 1249.200013] bridge0: port 2(bridge_slave_1) entered disabled state [ 1249.207533] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1249.218263] 8021q: adding VLAN 0 to HW filter on device team0 [ 1249.226780] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1249.234287] bridge0: port 1(bridge_slave_0) entered blocking state [ 1249.240714] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1249.250063] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1249.258102] bridge0: port 2(bridge_slave_1) entered blocking state [ 1249.264463] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1249.279150] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1249.287018] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1249.297210] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1249.310852] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 1249.321208] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 1249.332704] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1249.340596] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1249.348141] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1249.362658] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1249.372910] audit: type=1400 audit(1550311191.219:37): avc: denied { associate } for pid=8081 comm="syz-executor112" 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 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 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 executing program executing program executing program executing program [ 1413.074577] INFO: task kworker/0:1:12 blocked for more than 140 seconds. [ 1413.081678] Not tainted 5.0.0-rc6+ #73 [ 1413.089403] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1413.097746] kworker/0:1 D26560 12 2 0x80000000 [ 1413.103579] Workqueue: ipv6_addrconf addrconf_dad_work [ 1413.114622] Call Trace: [ 1413.117306] __schedule+0x817/0x1cc0 [ 1413.121031] ? __mutex_lock+0x721/0x1310 [ 1413.126543] ? pci_mmcfg_check_reserved+0x170/0x170 [ 1413.131589] schedule+0x92/0x180 [ 1413.135522] schedule_preempt_disabled+0x13/0x20 [ 1413.140298] __mutex_lock+0x726/0x1310 [ 1413.144271] ? rtnl_lock+0x17/0x20 [ 1413.149289] ? mutex_trylock+0x1e0/0x1e0 [ 1413.153489] ? debug_object_deactivate+0x1e4/0x360 [ 1413.159915] ? trace_hardirqs_off+0x62/0x220 [ 1413.164401] ? kasan_check_read+0x11/0x20 [ 1413.169882] mutex_lock_nested+0x16/0x20 [ 1413.173951] ? mutex_lock_nested+0x16/0x20 [ 1413.178742] rtnl_lock+0x17/0x20 [ 1413.182130] addrconf_dad_work+0xad/0x1150 [ 1413.187762] ? addrconf_dad_completed+0xbb0/0xbb0 [ 1413.192698] process_one_work+0x98e/0x1790 [ 1413.197368] ? pwq_dec_nr_in_flight+0x320/0x320 [ 1413.202095] ? lock_acquire+0x16f/0x3f0 [ 1413.207475] worker_thread+0x98/0xe40 [ 1413.211290] ? trace_hardirqs_on+0x67/0x230 [ 1413.216913] kthread+0x357/0x430 [ 1413.220295] ? process_one_work+0x1790/0x1790 [ 1413.226151] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 1413.231775] ret_from_fork+0x3a/0x50 [ 1413.235920] INFO: task kworker/1:1:22 blocked for more than 140 seconds. [ 1413.242777] Not tainted 5.0.0-rc6+ #73 [ 1413.248538] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1413.256866] kworker/1:1 D26848 22 2 0x80000000 [ 1413.262532] Workqueue: ipv6_addrconf addrconf_dad_work [ 1413.269491] Call Trace: [ 1413.272106] __schedule+0x817/0x1cc0 [ 1413.276204] ? __mutex_lock+0x721/0x1310 [ 1413.280285] ? pci_mmcfg_check_reserved+0x170/0x170 [ 1413.286682] schedule+0x92/0x180 [ 1413.290066] schedule_preempt_disabled+0x13/0x20 [ 1413.295194] __mutex_lock+0x726/0x1310 [ 1413.299099] ? rtnl_lock+0x17/0x20 [ 1413.302653] ? mutex_trylock+0x1e0/0x1e0 [ 1413.308143] ? debug_object_deactivate+0x1e4/0x360 [ 1413.313101] ? trace_hardirqs_off+0x62/0x220 [ 1413.318014] ? kasan_check_read+0x11/0x20 [ 1413.322183] mutex_lock_nested+0x16/0x20 [ 1413.327659] ? mutex_lock_nested+0x16/0x20 [ 1413.331918] rtnl_lock+0x17/0x20 [ 1413.335656] addrconf_dad_work+0xad/0x1150 [ 1413.339913] ? addrconf_dad_completed+0xbb0/0xbb0 [ 1413.346979] process_one_work+0x98e/0x1790 [ 1413.351238] ? pwq_dec_nr_in_flight+0x320/0x320 [ 1413.356306] ? lock_acquire+0x16f/0x3f0 [ 1413.360313] worker_thread+0x98/0xe40 [ 1413.364119] ? trace_hardirqs_on+0x67/0x230 [ 1413.369880] kthread+0x357/0x430 [ 1413.373261] ? process_one_work+0x1790/0x1790 [ 1413.378217] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 1413.383773] ret_from_fork+0x3a/0x50 [ 1413.388973] [ 1413.388973] Showing all locks held in the system: [ 1413.396150] 3 locks held by kworker/0:1/12: [ 1413.400476] #0: 00000000c092f744 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x87e/0x1790 [ 1413.412445] #1: 00000000ba501015 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: process_one_work+0x8b4/0x1790 [ 1413.423980] #2: 000000000a023ce4 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 [ 1413.432648] 3 locks held by kworker/1:1/22: [ 1413.437273] #0: 00000000c092f744 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x87e/0x1790 [ 1413.449132] #1: 00000000609e3f2e ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: process_one_work+0x8b4/0x1790 [ 1413.460485] #2: 000000000a023ce4 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 [ 1413.469192] 1 lock held by khungtaskd/1039: [ 1413.473520] #0: 000000009a681c98 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e [ 1413.483750] 1 lock held by rsyslogd/7932: [ 1413.489194] #0: 000000000ae60368 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 1413.497488] 2 locks held by getty/8054: [ 1413.501463] #0: 00000000330eb6bd (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1413.511158] #1: 00000000115a4ff9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 1413.520514] 2 locks held by getty/8055: [ 1413.525784] #0: 000000001f90753f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1413.534064] #1: 000000001e27037e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 1413.543388] 2 locks held by getty/8056: [ 1413.548720] #0: 0000000027f8ba41 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1413.557371] #1: 00000000a0356b01 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 1413.567573] 2 locks held by getty/8057: [ 1413.571550] #0: 000000009cf2ea94 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1413.580347] #1: 0000000097e38bce (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 1413.590614] 2 locks held by getty/8058: [ 1413.594988] #0: 000000006dd48e75 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1413.603342] #1: 00000000a75b841a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 1413.614482] 2 locks held by getty/8059: [ 1413.618465] #0: 0000000020112132 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1413.628159] #1: 00000000c3504044 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 1413.637425] 2 locks held by getty/8060: [ 1413.641402] #0: 000000001510234f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1413.651094] #1: 00000000e70220db (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 1413.660443] 1 lock held by syz-executor112/8443: [ 1413.666528] [ 1413.668168] ============================================= [ 1413.668168] [ 1413.675571] NMI backtrace for cpu 1 [ 1413.679217] CPU: 1 PID: 1039 Comm: khungtaskd Not tainted 5.0.0-rc6+ #73 [ 1413.686051] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1413.695438] Call Trace: [ 1413.698131] dump_stack+0x172/0x1f0 [ 1413.701780] nmi_cpu_backtrace.cold+0x63/0xa4 [ 1413.706352] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 1413.711296] nmi_trigger_cpumask_backtrace+0x1be/0x236 [ 1413.716594] arch_trigger_cpumask_backtrace+0x14/0x20 [ 1413.721844] watchdog+0x9df/0xee0 [ 1413.725320] kthread+0x357/0x430 [ 1413.728689] ? reset_hung_task_detector+0x30/0x30 [ 1413.733534] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 1413.739085] ret_from_fork+0x3a/0x50 [ 1413.743012] Sending NMI from CPU 1 to CPUs 0: [ 1413.749019] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.262 msecs [ 1413.749559] NMI backtrace for cpu 0 [ 1413.749567] CPU: 0 PID: 8443 Comm: syz-executor112 Not tainted 5.0.0-rc6+ #73 [ 1413.749575] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1413.749580] RIP: 0010:preempt_count_add+0xf8/0x1b0 [ 1413.749593] Code: 11 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 ab 00 00 00 49 89 9c 24 b0 11 00 00 5b 41 5c 5d 48 8b 45 00 48 8b 58 08 48 89 df e8 27 e7 09 00 85 c0 74 b3 48 [ 1413.749598] RSP: 0018:ffff88809e13f190 EFLAGS: 00000046 [ 1413.749608] RAX: dffffc0000000000 RBX: 0000000000000286 RCX: 0000000000000000 [ 1413.749614] RDX: 1ffff1100f1efe66 RSI: 0000000000000000 RDI: ffff888078f7f330 [ 1413.749620] RBP: ffff88809e13f1a8 R08: ffff888078f7e180 R09: ffffed1015d05bd0 [ 1413.749626] R10: ffffed1015d05bcf R11: ffff8880ae82de7b R12: ffffffff8a648b08 [ 1413.749632] R13: 0000000000000086 R14: ffffffff8a648b08 R15: 00000000004012c0 [ 1413.749639] FS: 00000000019f3940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 1413.749645] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1413.749651] CR2: ffffffffff600400 CR3: 00000000a1211000 CR4: 00000000001406f0 [ 1413.749657] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1413.749663] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1413.749667] Call Trace: [ 1413.749671] ? _raw_spin_lock_irqsave+0x79/0xcd [ 1413.749676] debug_check_no_obj_freed+0xbe/0x464 [ 1413.749680] kfree+0xbd/0x230 [ 1413.749684] skb_free_head+0x93/0xb0 [ 1413.749688] pskb_expand_head+0x2ba/0xdd0 [ 1413.749692] netlink_trim+0x215/0x270 [ 1413.749696] netlink_unicast+0xbf/0x720 [ 1413.749701] ? netlink_attachskb+0x770/0x770 [ 1413.749705] ? netlink_broadcast+0x3a/0x50 [ 1413.749709] rtnetlink_send+0xf0/0x110 [ 1413.749713] tcf_action_add+0x243/0x370 [ 1413.749718] ? tca_action_gd+0x17a0/0x17a0 [ 1413.749722] tc_ctl_action+0x3b6/0x4bd [ 1413.749726] ? tcf_action_add+0x370/0x370 [ 1413.749730] ? __lock_is_held+0xb6/0x140 [ 1413.749741] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 1413.749746] ? tcf_action_add+0x370/0x370 [ 1413.749750] rtnetlink_rcv_msg+0x465/0xb00 [ 1413.749755] ? rtnetlink_put_metrics+0x560/0x560 [ 1413.749759] ? netdev_pick_tx+0x300/0x300 [ 1413.749764] ? netlink_deliver_tap+0x22d/0xbf0 [ 1413.749768] ? find_held_lock+0x35/0x130 [ 1413.749772] netlink_rcv_skb+0x17a/0x460 [ 1413.749777] ? rtnetlink_put_metrics+0x560/0x560 [ 1413.749781] ? netlink_ack+0xb50/0xb50 [ 1413.749785] ? kasan_check_read+0x11/0x20 [ 1413.749790] ? netlink_deliver_tap+0x254/0xbf0 [ 1413.749794] rtnetlink_rcv+0x1d/0x30 [ 1413.749798] netlink_unicast+0x536/0x720 [ 1413.749803] ? netlink_attachskb+0x770/0x770 [ 1413.749808] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 1413.749812] netlink_sendmsg+0x8ae/0xd70 [ 1413.749817] ? netlink_unicast+0x720/0x720 [ 1413.749821] ? selinux_socket_sendmsg+0x36/0x40 [ 1413.749826] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 1413.749831] ? security_socket_sendmsg+0x93/0xc0 [ 1413.749835] ? netlink_unicast+0x720/0x720 [ 1413.749839] sock_sendmsg+0xdd/0x130 [ 1413.749844] ___sys_sendmsg+0x806/0x930 [ 1413.749848] ? copy_msghdr_from_user+0x430/0x430 [ 1413.749853] ? __local_bh_enable_ip+0x15a/0x270 [ 1413.749857] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1413.749861] ? release_sock+0x158/0x1c0 [ 1413.749866] ? trace_hardirqs_on+0x67/0x230 [ 1413.749870] ? release_sock+0x158/0x1c0 [ 1413.749874] ? __local_bh_enable_ip+0x15a/0x270 [ 1413.749879] ? _raw_spin_unlock_bh+0x31/0x40 [ 1413.749883] ? release_sock+0x158/0x1c0 [ 1413.749887] ? sock_setsockopt+0x197/0x2030 [ 1413.749892] ? sock_enable_timestamp+0xe0/0xe0 [ 1413.749897] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 1413.749901] ? __fget_light+0x1a9/0x230 [ 1413.749905] ? __fdget+0x1b/0x20 [ 1413.749910] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 1413.749914] __sys_sendmsg+0x105/0x1d0 [ 1413.749919] ? __ia32_sys_shutdown+0x80/0x80 [ 1413.749923] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1413.749928] ? do_syscall_64+0x26/0x610 [ 1413.749933] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1413.749937] ? do_syscall_64+0x26/0x610 [ 1413.749941] __x64_sys_sendmsg+0x78/0xb0 [ 1413.749945] do_syscall_64+0x103/0x610 [ 1413.749950] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1413.749954] RIP: 0033:0x45b129 [ 1413.749977] Code: e8 3c 0a 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 [ 1413.749982] RSP: 002b:00007ffc05c7adc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1413.749993] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045b129 [ 1413.749999] RDX: 00000000000000c4 RSI: 0000000020000300 RDI: 0000000000000003 [ 1413.750005] RBP: 0000000000000000 R08: 00000000000003e8 R09: 00000000000003e8 [ 1413.750012] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000162 [ 1413.750018] R13: 000000000041bda0 R14: 0000000000000000 R15: 0000000000000000 [ 1413.755788] Kernel panic - not syncing: hung_task: blocked tasks [ 1414.226171] CPU: 1 PID: 1039 Comm: khungtaskd Not tainted 5.0.0-rc6+ #73 [ 1414.233018] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1414.242381] Call Trace: [ 1414.244991] dump_stack+0x172/0x1f0 [ 1414.248698] panic+0x2cb/0x65c [ 1414.251906] ? __warn_printk+0xf3/0xf3 [ 1414.255804] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 1414.260753] ? ___preempt_schedule+0x16/0x18 [ 1414.265176] ? nmi_trigger_cpumask_backtrace+0x19e/0x236 [ 1414.270637] ? nmi_trigger_cpumask_backtrace+0x1fa/0x236 [ 1414.276097] ? nmi_trigger_cpumask_backtrace+0x204/0x236 [ 1414.281560] ? nmi_trigger_cpumask_backtrace+0x19e/0x236 [ 1414.287022] watchdog+0x9f0/0xee0 [ 1414.290488] kthread+0x357/0x430 [ 1414.293858] ? reset_hung_task_detector+0x30/0x30 [ 1414.298708] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 1414.304351] ret_from_fork+0x3a/0x50 [ 1414.309369] Kernel Offset: disabled [ 1414.313010] Rebooting in 86400 seconds..