[ 43.625305] audit: type=1800 audit(1564273470.250:30): pid=7697 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 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 syzkaller login: [ 47.479020] kauditd_printk_skb: 4 callbacks suppressed [ 47.479035] audit: type=1400 audit(1564273474.130:35): avc: denied { map } for pid=7869 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 '10.128.1.3' (ECDSA) to the list of known hosts. [ 991.092373] audit: type=1400 audit(1564274417.740:36): avc: denied { map } for pid=7881 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 2019/07/28 00:40:18 parsed 1 programs [ 991.941099] audit: type=1400 audit(1564274418.590:37): avc: denied { map } for pid=7881 comm="syz-execprog" path="/sys/kernel/debug/kcov" dev="debugfs" ino=14959 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:debugfs_t:s0 tclass=file permissive=1 2019/07/28 00:40:20 executed programs: 0 [ 993.809442] IPVS: ftp: loaded support on port[0] = 21 [ 993.899822] chnl_net:caif_netlink_parms(): no params data found [ 993.940043] bridge0: port 1(bridge_slave_0) entered blocking state [ 993.947162] bridge0: port 1(bridge_slave_0) entered disabled state [ 993.955084] device bridge_slave_0 entered promiscuous mode [ 993.963916] bridge0: port 2(bridge_slave_1) entered blocking state [ 993.970369] bridge0: port 2(bridge_slave_1) entered disabled state [ 993.977789] device bridge_slave_1 entered promiscuous mode [ 993.996110] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 994.005671] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 994.023533] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 994.031536] team0: Port device team_slave_0 added [ 994.038041] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 994.045455] team0: Port device team_slave_1 added [ 994.053397] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 994.061378] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 994.145452] device hsr_slave_0 entered promiscuous mode [ 994.213966] device hsr_slave_1 entered promiscuous mode [ 994.273860] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 994.281042] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 994.296277] bridge0: port 2(bridge_slave_1) entered blocking state [ 994.303006] bridge0: port 2(bridge_slave_1) entered forwarding state [ 994.310222] bridge0: port 1(bridge_slave_0) entered blocking state [ 994.316688] bridge0: port 1(bridge_slave_0) entered forwarding state [ 994.351419] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 994.358144] 8021q: adding VLAN 0 to HW filter on device bond0 [ 994.367686] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 994.377396] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 994.397659] bridge0: port 1(bridge_slave_0) entered disabled state [ 994.405491] bridge0: port 2(bridge_slave_1) entered disabled state [ 994.414979] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 994.426383] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 994.432564] 8021q: adding VLAN 0 to HW filter on device team0 [ 994.443777] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 994.451795] bridge0: port 1(bridge_slave_0) entered blocking state [ 994.458380] bridge0: port 1(bridge_slave_0) entered forwarding state [ 994.469598] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 994.477779] bridge0: port 2(bridge_slave_1) entered blocking state [ 994.484240] bridge0: port 2(bridge_slave_1) entered forwarding state [ 994.500457] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 994.508831] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 994.525462] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 994.534331] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 994.541985] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 994.551945] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 994.558358] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 994.572749] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 994.584265] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 994.596210] audit: type=1400 audit(1564274421.250:38): avc: denied { associate } for pid=7897 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 2019/07/28 00:40:25 executed programs: 48 2019/07/28 00:40:30 executed programs: 103 2019/07/28 00:40:35 executed programs: 159 2019/07/28 00:40:40 executed programs: 218 2019/07/28 00:40:45 executed programs: 279 2019/07/28 00:40:50 executed programs: 337 2019/07/28 00:40:55 executed programs: 393 2019/07/28 00:41:00 executed programs: 449 2019/07/28 00:41:05 executed programs: 507 2019/07/28 00:41:10 executed programs: 566 2019/07/28 00:41:15 executed programs: 630 2019/07/28 00:41:20 executed programs: 689 2019/07/28 00:41:25 executed programs: 750 2019/07/28 00:41:31 executed programs: 806 2019/07/28 00:41:36 executed programs: 864 2019/07/28 00:41:41 executed programs: 921 2019/07/28 00:41:46 executed programs: 977 2019/07/28 00:41:51 executed programs: 1040 2019/07/28 00:41:56 executed programs: 1093 2019/07/28 00:42:01 executed programs: 1148 2019/07/28 00:42:06 executed programs: 1202 2019/07/28 00:42:11 executed programs: 1254 2019/07/28 00:42:16 executed programs: 1310 2019/07/28 00:42:21 executed programs: 1366 2019/07/28 00:42:26 executed programs: 1420 2019/07/28 00:42:31 executed programs: 1481 2019/07/28 00:42:36 executed programs: 1540 2019/07/28 00:42:41 executed programs: 1595 2019/07/28 00:42:46 executed programs: 1651 2019/07/28 00:42:51 executed programs: 1707 2019/07/28 00:42:56 executed programs: 1773 2019/07/28 00:43:02 executed programs: 1830 [ 1309.513117] INFO: task syz-executor.0:15460 blocked for more than 140 seconds. [ 1309.520692] Not tainted 4.19.61 #35 [ 1309.526474] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1309.534962] syz-executor.0 D28216 15460 7897 0x80000000 [ 1309.540635] Call Trace: [ 1309.549433] __schedule+0x866/0x1dc0 [ 1309.553719] ? pci_mmcfg_check_reserved+0x170/0x170 [ 1309.558758] ? rwsem_down_read_failed+0x1e3/0x3c0 [ 1309.565049] ? _raw_spin_unlock_irq+0x28/0x90 [ 1309.569618] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1309.575479] schedule+0x92/0x1c0 [ 1309.578870] rwsem_down_read_failed+0x21b/0x3c0 [ 1309.584926] ? rwsem_down_write_failed_killable+0xe30/0xe30 [ 1309.590679] ? __might_fault+0x12b/0x1e0 [ 1309.595206] call_rwsem_down_read_failed+0x18/0x30 [ 1309.600162] down_read+0x49/0xb0 [ 1309.604891] ? do_exit+0x4bc/0x2fa0 [ 1309.608536] do_exit+0x4bc/0x2fa0 [ 1309.611998] ? do_group_exit+0x2e9/0x370 [ 1309.616434] ? mm_update_next_owner+0x660/0x660 [ 1309.621122] ? _raw_spin_unlock_irq+0x28/0x90 [ 1309.626934] ? do_group_exit+0x2e9/0x370 [ 1309.631011] ? _raw_spin_unlock_irq+0x28/0x90 [ 1309.635832] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1309.640445] ? trace_hardirqs_on+0x67/0x220 [ 1309.646127] ? kasan_check_read+0x11/0x20 [ 1309.650300] do_group_exit+0x135/0x370 [ 1309.654534] __x64_sys_exit_group+0x44/0x50 [ 1309.658885] do_syscall_64+0xfd/0x620 [ 1309.662692] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1309.669308] RIP: 0033:0x459829 [ 1309.672600] Code: Bad RIP value. [ 1309.676376] RSP: 002b:00007ffe42b15d98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 1309.685451] RAX: ffffffffffffffda RBX: 000000000000001e RCX: 0000000000459829 [ 1309.692732] RDX: 0000000000413511 RSI: fffffffffffffff7 RDI: 0000000000000000 [ 1309.700402] RBP: 0000000000000000 R08: ffffffffffffffff R09: 00007ffe42b15df0 [ 1309.709843] R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000001 [ 1309.717548] R13: 00007ffe42b15df0 R14: 0000000000000000 R15: 00007ffe42b15e00 [ 1309.726150] INFO: task syz-executor.0:15461 blocked for more than 140 seconds. [ 1309.733780] Not tainted 4.19.61 #35 [ 1309.737931] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1309.747260] syz-executor.0 D28104 15461 7897 0x80000000 [ 1309.753209] Call Trace: [ 1309.755819] __schedule+0x866/0x1dc0 [ 1309.759547] ? pci_mmcfg_check_reserved+0x170/0x170 [ 1309.766060] ? rwsem_down_read_failed+0x1e3/0x3c0 [ 1309.770919] ? _raw_spin_unlock_irq+0x28/0x90 [ 1309.775755] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1309.780355] schedule+0x92/0x1c0 [ 1309.785030] rwsem_down_read_failed+0x21b/0x3c0 [ 1309.789724] ? rwsem_down_write_failed_killable+0xe30/0xe30 [ 1309.795798] ? __might_fault+0x12b/0x1e0 [ 1309.799894] call_rwsem_down_read_failed+0x18/0x30 [ 1309.806299] down_read+0x49/0xb0 [ 1309.809678] ? do_exit+0x4bc/0x2fa0 [ 1309.813631] do_exit+0x4bc/0x2fa0 [ 1309.817100] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 1309.821943] ? trace_hardirqs_on+0x67/0x220 [ 1309.829358] ? get_signal+0x384/0x1fc0 [ 1309.834401] ? mm_update_next_owner+0x660/0x660 [ 1309.839094] ? _raw_spin_unlock_irq+0x28/0x90 [ 1309.844924] ? get_signal+0x384/0x1fc0 [ 1309.848917] ? _raw_spin_unlock_irq+0x28/0x90 [ 1309.853760] do_group_exit+0x135/0x370 [ 1309.857665] get_signal+0x3ec/0x1fc0 [ 1309.861388] ? __might_fault+0x12b/0x1e0 [ 1309.866870] do_signal+0x95/0x1960 [ 1309.870431] ? setup_sigcontext+0x7d0/0x7d0 [ 1309.875087] ? kasan_check_read+0x11/0x20 [ 1309.879281] ? _copy_to_user+0xc9/0x120 [ 1309.884594] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 1309.890153] ? __x64_sys_futex+0x40d/0x590 [ 1309.894710] ? exit_to_usermode_loop+0x43/0x2c0 [ 1309.899394] ? do_syscall_64+0x53d/0x620 [ 1309.904781] ? exit_to_usermode_loop+0x43/0x2c0 [ 1309.909485] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1309.914412] ? trace_hardirqs_on+0x67/0x220 [ 1309.918757] exit_to_usermode_loop+0x244/0x2c0 [ 1309.924671] do_syscall_64+0x53d/0x620 [ 1309.928582] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1309.934093] RIP: 0033:0x459829 [ 1309.937308] Code: Bad RIP value. [ 1309.940669] RSP: 002b:00007f838e683cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 1309.949761] RAX: fffffffffffffe00 RBX: 000000000075bf28 RCX: 0000000000459829 [ 1309.957380] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bf28 [ 1309.966879] RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 [ 1309.974471] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c [ 1309.981757] R13: 00007ffe42b15b8f R14: 00007f838e6849c0 R15: 000000000075bf2c [ 1309.990570] [ 1309.990570] Showing all locks held in the system: [ 1309.997282] 1 lock held by khungtaskd/1038: [ 1310.001609] #0: 000000000524fa05 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e [ 1310.011742] 1 lock held by rsyslogd/7735: [ 1310.016188] #0: 00000000404c4745 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 1310.025479] 2 locks held by getty/7857: [ 1310.029454] #0: 000000006a81b65b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1310.038106] #1: 000000002496cf70 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1310.048389] 2 locks held by getty/7858: [ 1310.052373] #0: 0000000025e8a84a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1310.061132] #1: 0000000036161074 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1310.071389] 2 locks held by getty/7859: [ 1310.076662] #0: 00000000b29ecd47 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1310.086263] #1: 00000000e009a43a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1310.096353] 2 locks held by getty/7860: [ 1310.100333] #0: 000000004631319c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1310.110188] #1: 00000000e5f1903c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1310.119486] 2 locks held by getty/7861: [ 1310.124725] #0: 00000000351c1104 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1310.133310] #1: 00000000788dea2e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1310.142216] 2 locks held by getty/7862: [ 1310.147543] #0: 0000000037f78aa3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1310.156121] #1: 000000002acd47bd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1310.166327] 2 locks held by getty/7863: [ 1310.170302] #0: 0000000057dc54a1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1310.178924] #1: 000000000be1aa1d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1310.189193] 1 lock held by syz-executor.0/15460: [ 1310.194236] #0: 00000000e8390ecd (&mm->mmap_sem){++++}, at: do_exit+0x4bc/0x2fa0 [ 1310.201918] 1 lock held by syz-executor.0/15461: [ 1310.207999] #0: 00000000e8390ecd (&mm->mmap_sem){++++}, at: do_exit+0x4bc/0x2fa0 [ 1310.215973] 1 lock held by syz-executor.0/15462: [ 1310.220733] [ 1310.222359] ============================================= [ 1310.222359] [ 1310.232046] NMI backtrace for cpu 0 [ 1310.235856] CPU: 0 PID: 1038 Comm: khungtaskd Not tainted 4.19.61 #35 [ 1310.242496] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1310.251886] Call Trace: [ 1310.254490] dump_stack+0x172/0x1f0 [ 1310.258127] nmi_cpu_backtrace.cold+0x63/0xa4 [ 1310.262636] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 1310.267573] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 1310.272860] arch_trigger_cpumask_backtrace+0x14/0x20 [ 1310.278056] watchdog+0x9df/0xee0 [ 1310.281527] kthread+0x354/0x420 [ 1310.284898] ? reset_hung_task_detector+0x30/0x30 [ 1310.289743] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 1310.295290] ret_from_fork+0x24/0x30 [ 1310.299121] Sending NMI from CPU 0 to CPUs 1: [ 1310.304549] NMI backtrace for cpu 1 [ 1310.304556] CPU: 1 PID: 15462 Comm: syz-executor.0 Not tainted 4.19.61 #35 [ 1310.304563] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1310.304568] RIP: 0010:check_memory_region+0xc0/0x190 [ 1310.304580] Code: 0f 84 8f 00 00 00 48 83 38 00 74 ed 4c 8d 40 08 eb 09 48 83 c0 01 49 39 c0 74 0a 80 38 00 74 f2 48 85 c0 75 5e 5b 41 5c 41 5d <5d> c3 41 bd 08 00 00 00 45 29 c5 4d 89 e0 4f 8d 4c 25 00 eb 0c 49 [ 1310.304585] RSP: 0018:ffff8880a8b87690 EFLAGS: 00000046 [ 1310.304594] RAX: fffffbfff13e22f0 RBX: 0000000000000000 RCX: ffffffff8152306b [ 1310.304600] RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff89f11778 [ 1310.304605] RBP: ffff8880a8b87690 R08: 1ffffffff13e22ef R09: fffffbfff13e22f0 [ 1310.304611] R10: fffffbfff13e22ef R11: ffffffff89f1177b R12: 0000000000000000 [ 1310.304617] R13: 0000000000000000 R14: ffff88808b6bc240 R15: ffff88808b8c5890 [ 1310.304623] FS: 00007f838e663700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 1310.304628] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1310.304634] CR2: ffffffffff600400 CR3: 00000000944ca000 CR4: 00000000001406e0 [ 1310.304640] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1310.304645] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1310.304649] Call Trace: [ 1310.304653] kasan_check_write+0x14/0x20 [ 1310.304657] __lock_acquire+0x23b/0x49c0 [ 1310.304661] ? mark_held_locks+0xb1/0x100 [ 1310.304665] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1310.304670] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1310.304674] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1310.304678] ? mark_held_locks+0x100/0x100 [ 1310.304682] ? retint_kernel+0x2d/0x2d [ 1310.304686] ? perf_mmap+0x730/0x19b0 [ 1310.304691] ? __lock_is_held+0xb6/0x140 [ 1310.304695] ? perf_mmap+0x730/0x19b0 [ 1310.304699] lock_acquire+0x16f/0x3f0 [ 1310.304703] ? perf_mmap+0x730/0x19b0 [ 1310.304706] ? perf_mmap+0x730/0x19b0 [ 1310.304710] __mutex_lock+0xf7/0x1300 [ 1310.304714] ? perf_mmap+0x730/0x19b0 [ 1310.304719] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1310.304723] ? perf_mmap+0x730/0x19b0 [ 1310.304727] ? lock_downgrade+0x810/0x810 [ 1310.304731] ? mutex_trylock+0x1e0/0x1e0 [ 1310.304736] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1310.304740] ? kasan_check_write+0x14/0x20 [ 1310.304744] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 1310.304748] ? retint_kernel+0x2d/0x2d [ 1310.304753] ? wait_for_completion+0x440/0x440 [ 1310.304757] mutex_lock_nested+0x16/0x20 [ 1310.304761] ? mutex_lock_nested+0x16/0x20 [ 1310.304765] perf_mmap+0x730/0x19b0 [ 1310.304775] ? perf_release+0x50/0x50 [ 1310.304779] ? do_munmap+0x893/0xed0 [ 1310.304782] ? memset+0x32/0x40 [ 1310.304786] mmap_region+0xc2f/0x1760 [ 1310.304790] ? __x64_sys_brk+0x6c0/0x6c0 [ 1310.304795] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 1310.304799] ? get_unmapped_area+0x293/0x3b0 [ 1310.304803] do_mmap+0x8e2/0x1080 [ 1310.304807] vm_mmap_pgoff+0x1c5/0x230 [ 1310.304812] ? vma_is_stack_for_current+0xd0/0xd0 [ 1310.304816] ? iterate_fd+0x360/0x360 [ 1310.304820] ? _copy_to_user+0xc9/0x120 [ 1310.304824] ksys_mmap_pgoff+0x4aa/0x630 [ 1310.304828] ? find_mergeable_anon_vma+0x2e0/0x2e0 [ 1310.304833] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1310.304837] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1310.304841] ? do_syscall_64+0x26/0x620 [ 1310.304846] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1310.304850] __x64_sys_mmap+0xe9/0x1b0 [ 1310.304854] do_syscall_64+0xfd/0x620 [ 1310.304859] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1310.304863] RIP: 0033:0x459829 [ 1310.304875] Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 1310.304880] RSP: 002b:00007f838e662c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 [ 1310.304890] RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459829 [ 1310.304896] RDX: 0000000003000001 RSI: 0000000000003000 RDI: 0000000020ffd000 [ 1310.304901] RBP: 000000000075bfc8 R08: 0000000000000003 R09: 0000000000000000 [ 1310.304907] R10: 0000000000001011 R11: 0000000000000246 R12: 00007f838e6636d4 [ 1310.304913] R13: 00000000004c5d59 R14: 00000000004da6d0 R15: 00000000ffffffff [ 1310.308539] Kernel panic - not syncing: hung_task: blocked tasks [ 1310.706029] CPU: 0 PID: 1038 Comm: khungtaskd Not tainted 4.19.61 #35 [ 1310.712691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1310.722045] Call Trace: [ 1310.724646] dump_stack+0x172/0x1f0 [ 1310.728331] panic+0x263/0x507 [ 1310.731524] ? __warn_printk+0xf3/0xf3 [ 1310.735418] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 1310.740357] ? ___preempt_schedule+0x16/0x18 [ 1310.744771] ? nmi_trigger_cpumask_backtrace+0x165/0x1f8 [ 1310.750224] ? nmi_trigger_cpumask_backtrace+0x1c1/0x1f8 [ 1310.755674] ? nmi_trigger_cpumask_backtrace+0x1cb/0x1f8 [ 1310.761211] ? nmi_trigger_cpumask_backtrace+0x165/0x1f8 [ 1310.766672] watchdog+0x9f0/0xee0 [ 1310.770140] kthread+0x354/0x420 [ 1310.773510] ? reset_hung_task_detector+0x30/0x30 [ 1310.778359] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 1310.783903] ret_from_fork+0x24/0x30 [ 1310.789113] Kernel Offset: disabled [ 1310.792802] Rebooting in 86400 seconds..