[ 45.158141] audit: type=1800 audit(1556214348.279:30): pid=7855 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=2490 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 49.118568] kauditd_printk_skb: 4 callbacks suppressed [ 49.118584] audit: type=1400 audit(1556214352.289:35): avc: denied { map } for pid=8032 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.144' (ECDSA) to the list of known hosts. [ 753.943751] audit: type=1400 audit(1556215057.119:36): avc: denied { map } for pid=8044 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2019/04/25 17:57:38 parsed 1 programs [ 754.820339] audit: type=1400 audit(1556215057.989:37): avc: denied { map } for pid=8044 comm="syz-execprog" path="/sys/kernel/debug/kcov" dev="debugfs" ino=14974 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:debugfs_t:s0 tclass=file permissive=1 2019/04/25 17:57:40 executed programs: 0 [ 757.204658] IPVS: ftp: loaded support on port[0] = 21 [ 757.273274] chnl_net:caif_netlink_parms(): no params data found [ 757.308894] bridge0: port 1(bridge_slave_0) entered blocking state [ 757.316170] bridge0: port 1(bridge_slave_0) entered disabled state [ 757.323950] device bridge_slave_0 entered promiscuous mode [ 757.331554] bridge0: port 2(bridge_slave_1) entered blocking state [ 757.338221] bridge0: port 2(bridge_slave_1) entered disabled state [ 757.345504] device bridge_slave_1 entered promiscuous mode [ 757.361547] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 757.371557] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 757.390797] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 757.398835] team0: Port device team_slave_0 added [ 757.404564] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 757.411864] team0: Port device team_slave_1 added [ 757.417368] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 757.424974] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 757.474582] device hsr_slave_0 entered promiscuous mode [ 757.542433] device hsr_slave_1 entered promiscuous mode [ 757.592823] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 757.599951] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 757.614906] bridge0: port 2(bridge_slave_1) entered blocking state [ 757.621407] bridge0: port 2(bridge_slave_1) entered forwarding state [ 757.628523] bridge0: port 1(bridge_slave_0) entered blocking state [ 757.634997] bridge0: port 1(bridge_slave_0) entered forwarding state [ 757.667753] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 757.675448] 8021q: adding VLAN 0 to HW filter on device bond0 [ 757.684345] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 757.695551] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 757.715481] bridge0: port 1(bridge_slave_0) entered disabled state [ 757.723509] bridge0: port 2(bridge_slave_1) entered disabled state [ 757.730789] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 757.742737] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 757.748964] 8021q: adding VLAN 0 to HW filter on device team0 [ 757.759616] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 757.767850] bridge0: port 1(bridge_slave_0) entered blocking state [ 757.774241] bridge0: port 1(bridge_slave_0) entered forwarding state [ 757.793614] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 757.801441] bridge0: port 2(bridge_slave_1) entered blocking state [ 757.807927] bridge0: port 2(bridge_slave_1) entered forwarding state [ 757.815281] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 757.823569] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 757.832066] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 757.845713] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 757.855896] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 757.868416] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 757.875171] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 757.883282] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 757.891672] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 757.905538] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 757.916911] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 757.927769] audit: type=1400 audit(1556215061.099:38): avc: denied { associate } for pid=8060 comm="syz-executor.0" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 2019/04/25 17:57:45 executed programs: 49 2019/04/25 17:57:50 executed programs: 104 2019/04/25 17:57:55 executed programs: 158 2019/04/25 17:58:00 executed programs: 216 2019/04/25 17:58:05 executed programs: 274 2019/04/25 17:58:10 executed programs: 331 2019/04/25 17:58:15 executed programs: 388 2019/04/25 17:58:20 executed programs: 443 2019/04/25 17:58:25 executed programs: 498 2019/04/25 17:58:30 executed programs: 551 2019/04/25 17:58:35 executed programs: 607 2019/04/25 17:58:40 executed programs: 665 2019/04/25 17:58:45 executed programs: 721 2019/04/25 17:58:50 executed programs: 779 2019/04/25 17:58:55 executed programs: 837 2019/04/25 17:59:01 executed programs: 893 2019/04/25 17:59:06 executed programs: 952 2019/04/25 17:59:11 executed programs: 1008 2019/04/25 17:59:16 executed programs: 1060 2019/04/25 17:59:21 executed programs: 1117 2019/04/25 17:59:26 executed programs: 1170 2019/04/25 17:59:31 executed programs: 1225 2019/04/25 17:59:36 executed programs: 1280 2019/04/25 17:59:41 executed programs: 1337 2019/04/25 17:59:46 executed programs: 1390 2019/04/25 17:59:51 executed programs: 1445 2019/04/25 17:59:56 executed programs: 1500 2019/04/25 18:00:01 executed programs: 1556 2019/04/25 18:00:06 executed programs: 1609 2019/04/25 18:00:11 executed programs: 1665 2019/04/25 18:00:16 executed programs: 1722 2019/04/25 18:00:21 executed programs: 1789 2019/04/25 18:00:26 executed programs: 1847 2019/04/25 18:00:31 executed programs: 1909 2019/04/25 18:00:36 executed programs: 1966 2019/04/25 18:00:41 executed programs: 2020 2019/04/25 18:00:46 executed programs: 2075 2019/04/25 18:00:51 executed programs: 2129 2019/04/25 18:00:56 executed programs: 2186 2019/04/25 18:01:01 executed programs: 2243 2019/04/25 18:01:06 executed programs: 2302 2019/04/25 18:01:11 executed programs: 2356 2019/04/25 18:01:16 executed programs: 2411 2019/04/25 18:01:21 executed programs: 2465 2019/04/25 18:01:27 executed programs: 2519 2019/04/25 18:01:32 executed programs: 2574 [ 1146.862150] INFO: task syz-executor.0:19020 blocked for more than 140 seconds. [ 1146.870254] Not tainted 4.19.36 #4 [ 1146.876203] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1146.886284] syz-executor.0 D28216 19020 8060 0x80000000 [ 1146.899844] Call Trace: [ 1146.903127] __schedule+0x813/0x1d00 [ 1146.907101] ? pci_mmcfg_check_reserved+0x170/0x170 [ 1146.914542] ? rwsem_down_read_failed+0x1e1/0x3c0 [ 1146.919907] ? _raw_spin_unlock_irq+0x28/0x90 [ 1146.925659] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1146.931647] schedule+0x92/0x1c0 [ 1146.938544] rwsem_down_read_failed+0x219/0x3c0 [ 1146.945017] ? __rwsem_down_read_failed_common.part.0+0x80/0x80 [ 1146.954205] ? __might_fault+0x12b/0x1e0 [ 1146.960919] call_rwsem_down_read_failed+0x18/0x30 [ 1146.966828] down_read+0x49/0xb0 [ 1146.970604] ? do_exit+0x45b/0x2fa0 [ 1146.976865] do_exit+0x45b/0x2fa0 [ 1146.980923] ? do_group_exit+0x2e9/0x370 [ 1146.985548] ? mm_update_next_owner+0x660/0x660 [ 1146.995942] ? _raw_spin_unlock_irq+0x28/0x90 [ 1147.001011] ? do_group_exit+0x2e9/0x370 [ 1147.007019] ? _raw_spin_unlock_irq+0x28/0x90 [ 1147.011663] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1147.025040] ? trace_hardirqs_on+0x67/0x230 [ 1147.038677] ? kasan_check_read+0x11/0x20 [ 1147.063892] do_group_exit+0x135/0x370 [ 1147.070399] __x64_sys_exit_group+0x44/0x50 [ 1147.075982] do_syscall_64+0x103/0x610 [ 1147.083686] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1147.089840] RIP: 0033:0x458da9 [ 1147.093843] Code: Bad RIP value. [ 1147.097854] RSP: 002b:00007ffdaf955cc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 1147.107644] RAX: ffffffffffffffda RBX: 000000000000001e RCX: 0000000000458da9 [ 1147.115924] RDX: 0000000000412b61 RSI: fffffffffffffff7 RDI: 0000000000000000 [ 1147.125160] RBP: 0000000000000000 R08: ffffffffffffffff R09: 00007ffdaf955d20 [ 1147.134029] R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000001 [ 1147.141339] R13: 00007ffdaf955d20 R14: 0000000000000000 R15: 00007ffdaf955d30 [ 1147.150615] INFO: task syz-executor.0:19021 blocked for more than 140 seconds. [ 1147.159190] Not tainted 4.19.36 #4 [ 1147.165419] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1147.174009] syz-executor.0 D28104 19021 8060 0x80000000 [ 1147.179943] Call Trace: [ 1147.184293] __schedule+0x813/0x1d00 [ 1147.190562] ? pci_mmcfg_check_reserved+0x170/0x170 [ 1147.197448] ? rwsem_down_read_failed+0x1e1/0x3c0 [ 1147.204023] ? _raw_spin_unlock_irq+0x28/0x90 [ 1147.209041] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1147.214230] schedule+0x92/0x1c0 [ 1147.218094] rwsem_down_read_failed+0x219/0x3c0 [ 1147.224952] ? __rwsem_down_read_failed_common.part.0+0x80/0x80 [ 1147.232738] ? __might_fault+0x12b/0x1e0 [ 1147.236934] call_rwsem_down_read_failed+0x18/0x30 [ 1147.243857] down_read+0x49/0xb0 [ 1147.247450] ? do_exit+0x45b/0x2fa0 [ 1147.251100] do_exit+0x45b/0x2fa0 [ 1147.255099] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 1147.259986] ? trace_hardirqs_on+0x67/0x230 [ 1147.267236] ? get_signal+0x331/0x1d50 [ 1147.276841] ? mm_update_next_owner+0x660/0x660 [ 1147.283699] ? _raw_spin_unlock_irq+0x28/0x90 [ 1147.288239] ? get_signal+0x331/0x1d50 [ 1147.292673] ? _raw_spin_unlock_irq+0x28/0x90 [ 1147.297215] do_group_exit+0x135/0x370 [ 1147.301127] get_signal+0x399/0x1d50 [ 1147.306542] ? __might_fault+0x12b/0x1e0 [ 1147.314391] do_signal+0x95/0x1950 [ 1147.319909] ? setup_sigcontext+0x7d0/0x7d0 [ 1147.326903] ? kasan_check_read+0x11/0x20 [ 1147.331450] ? _copy_to_user+0xc9/0x120 [ 1147.336097] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 1147.343618] ? __x64_sys_futex+0x40d/0x590 [ 1147.348028] ? exit_to_usermode_loop+0x43/0x2c0 [ 1147.353538] ? do_syscall_64+0x52d/0x610 [ 1147.357635] ? exit_to_usermode_loop+0x43/0x2c0 [ 1147.364083] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1147.368720] ? trace_hardirqs_on+0x67/0x230 [ 1147.373602] exit_to_usermode_loop+0x244/0x2c0 [ 1147.378781] do_syscall_64+0x52d/0x610 [ 1147.384498] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1147.390118] RIP: 0033:0x458da9 [ 1147.393813] Code: Bad RIP value. [ 1147.397303] RSP: 002b:00007f2a65226cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 1147.407045] RAX: fffffffffffffe00 RBX: 000000000073bf08 RCX: 0000000000458da9 [ 1147.416008] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000073bf08 [ 1147.426146] RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 [ 1147.434189] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000073bf0c [ 1147.441616] R13: 00007ffdaf955abf R14: 00007f2a652279c0 R15: 000000000073bf0c [ 1147.450737] [ 1147.450737] Showing all locks held in the system: [ 1147.458670] 1 lock held by khungtaskd/1031: [ 1147.464477] #0: 0000000049451bfe (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e [ 1147.473902] 1 lock held by rsyslogd/7893: [ 1147.479416] #0: 0000000051ff31f1 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 1147.490110] 2 locks held by getty/8015: [ 1147.494709] #0: 0000000015937adc (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1147.504741] #1: 000000003536a23a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1147.514805] 2 locks held by getty/8016: [ 1147.518883] #0: 000000002675aa00 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1147.528942] #1: 00000000a9611bf5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1147.540027] 2 locks held by getty/8017: [ 1147.545663] #0: 000000000994faa5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1147.554505] #1: 0000000020e7650f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1147.565621] 2 locks held by getty/8018: [ 1147.569710] #0: 00000000b81da2f0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1147.578520] #1: 000000006ca6ce54 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1147.590312] 2 locks held by getty/8019: [ 1147.596183] #0: 000000001bbd7dcf (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1147.611310] #1: 000000004c4e3978 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1147.623742] 2 locks held by getty/8020: [ 1147.637926] #0: 000000004bb2e48a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1147.650265] #1: 00000000565b0f38 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1147.665952] 2 locks held by getty/8021: [ 1147.673521] #0: 00000000e1e42c46 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1147.684434] #1: 00000000c00a5482 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1147.695809] 1 lock held by syz-executor.0/19020: [ 1147.704426] #0: 000000009fc8b3fb (&mm->mmap_sem){++++}, at: do_exit+0x45b/0x2fa0 [ 1147.714198] 1 lock held by syz-executor.0/19021: [ 1147.720254] #0: 000000009fc8b3fb (&mm->mmap_sem){++++}, at: do_exit+0x45b/0x2fa0 [ 1147.731096] 1 lock held by syz-executor.0/19022: [ 1147.736458] [ 1147.738219] ============================================= [ 1147.738219] [ 1147.746927] NMI backtrace for cpu 0 [ 1147.750613] CPU: 0 PID: 1031 Comm: khungtaskd Not tainted 4.19.36 #4 [ 1147.757390] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1147.768906] Call Trace: [ 1147.772596] dump_stack+0x172/0x1f0 [ 1147.777987] nmi_cpu_backtrace.cold+0x63/0xa4 [ 1147.783123] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 1147.789220] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 1147.795005] arch_trigger_cpumask_backtrace+0x14/0x20 [ 1147.800230] watchdog+0x9df/0xee0 [ 1147.803814] kthread+0x357/0x430 [ 1147.807492] ? reset_hung_task_detector+0x30/0x30 [ 1147.812807] ? kthread_delayed_work_timer_fn+0x290/0x290 [ 1147.818404] ret_from_fork+0x3a/0x50 [ 1147.824224] Sending NMI from CPU 0 to CPUs 1: [ 1147.829981] NMI backtrace for cpu 1 [ 1147.829988] CPU: 1 PID: 19022 Comm: syz-executor.0 Not tainted 4.19.36 #4 [ 1147.829995] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1147.830000] RIP: 0010:check_memory_region+0x22/0x190 [ 1147.830013] Code: 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 21 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 53 <0f> 86 f6 00 00 00 4c 8d 5c 37 ff 49 89 f8 48 b8 00 00 00 00 00 fc [ 1147.830018] RSP: 0018:ffff8880a93d78d8 EFLAGS: 00000216 [ 1147.830027] RAX: ffff7fffffffffff RBX: 0000000000000000 RCX: ffffffff86edec97 [ 1147.830033] RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8880a02819b0 [ 1147.830039] RBP: ffff8880a93d78f0 R08: 1ffff11014050336 R09: ffffed1014050337 [ 1147.830045] R10: ffffed1014050336 R11: ffff8880a02819b7 R12: fffffbfff146bec4 [ 1147.830051] R13: ffff8880a02819b0 R14: ffff888085e3a540 R15: 0000000000000000 [ 1147.830057] FS: 00007f2a65206700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 1147.830062] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1147.830068] CR2: ffffffffff600400 CR3: 0000000085beb000 CR4: 00000000001406e0 [ 1147.830072] Call Trace: [ 1147.830076] kasan_check_write+0x14/0x20 [ 1147.830080] __mutex_lock+0x397/0x1300 [ 1147.830084] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1147.830088] ? perf_mmap+0x738/0x1730 [ 1147.830092] ? lock_downgrade+0x810/0x810 [ 1147.830096] ? mutex_trylock+0x1e0/0x1e0 [ 1147.830101] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1147.830105] ? kasan_check_write+0x14/0x20 [ 1147.830110] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 1147.830114] ? retint_kernel+0x2d/0x2d [ 1147.830118] ? wait_for_completion+0x440/0x440 [ 1147.830122] mutex_lock_nested+0x16/0x20 [ 1147.830127] ? mutex_lock_nested+0x16/0x20 [ 1147.830131] perf_mmap+0x738/0x1730 [ 1147.830135] ? perf_release+0x50/0x50 [ 1147.830139] ? do_munmap+0x893/0xed0 [ 1147.830142] ? memset+0x32/0x40 [ 1147.830146] mmap_region+0xc34/0x1760 [ 1147.830151] ? __x64_sys_brk+0x6c0/0x6c0 [ 1147.830155] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 1147.830160] ? get_unmapped_area+0x295/0x3b0 [ 1147.830164] do_mmap+0x8e2/0x1080 [ 1147.830168] vm_mmap_pgoff+0x1c5/0x230 [ 1147.830172] ? vma_is_stack_for_current+0xd0/0xd0 [ 1147.830176] ? iterate_fd+0x360/0x360 [ 1147.830180] ? _copy_to_user+0xc9/0x120 [ 1147.830185] ksys_mmap_pgoff+0x4aa/0x630 [ 1147.830189] ? find_mergeable_anon_vma+0x2e0/0x2e0 [ 1147.830194] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1147.830199] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1147.830203] ? do_syscall_64+0x26/0x610 [ 1147.830207] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1147.830211] __x64_sys_mmap+0xe9/0x1b0 [ 1147.830215] do_syscall_64+0x103/0x610 [ 1147.830220] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1147.830223] RIP: 0033:0x458da9 [ 1147.830247] Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 1147.830251] RSP: 002b:00007f2a65205c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 [ 1147.830261] RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000458da9 [ 1147.830266] RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffd000 [ 1147.830272] RBP: 000000000073bfa0 R08: 0000000000000003 R09: 0000000000000000 [ 1147.830277] R10: 0000000000001011 R11: 0000000000000246 R12: 00007f2a652066d4 [ 1147.830283] R13: 00000000004c4d43 R14: 00000000004d8978 R15: 00000000ffffffff [ 1147.832037] Kernel panic - not syncing: hung_task: blocked tasks [ 1148.200336] CPU: 0 PID: 1031 Comm: khungtaskd Not tainted 4.19.36 #4 [ 1148.207466] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1148.219106] Call Trace: [ 1148.221727] dump_stack+0x172/0x1f0 [ 1148.225627] panic+0x263/0x51d [ 1148.229118] ? __warn_printk+0xf3/0xf3 [ 1148.233295] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 1148.239343] ? ___preempt_schedule+0x16/0x18 [ 1148.243812] ? nmi_trigger_cpumask_backtrace+0x165/0x1f8 [ 1148.249317] ? nmi_trigger_cpumask_backtrace+0x1c1/0x1f8 [ 1148.256571] ? nmi_trigger_cpumask_backtrace+0x1cb/0x1f8 [ 1148.262563] ? nmi_trigger_cpumask_backtrace+0x165/0x1f8 [ 1148.268406] watchdog+0x9f0/0xee0 [ 1148.272626] kthread+0x357/0x430 [ 1148.276051] ? reset_hung_task_detector+0x30/0x30 [ 1148.281017] ? kthread_delayed_work_timer_fn+0x290/0x290 [ 1148.286849] ret_from_fork+0x3a/0x50 [ 1148.291614] Kernel Offset: disabled [ 1148.296005] Rebooting in 86400 seconds..