[ 44.489810] audit: type=1800 audit(1555700486.955:30): pid=7758 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: [ 49.684306] kauditd_printk_skb: 4 callbacks suppressed [ 49.684322] audit: type=1400 audit(1555700492.175:35): avc: denied { map } for pid=7934 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 '10.128.0.110' (ECDSA) to the list of known hosts. [ 803.160769] audit: type=1400 audit(1555701245.645:36): avc: denied { map } for pid=7946 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2019/04/19 19:14:06 parsed 1 programs [ 803.999706] audit: type=1400 audit(1555701246.485:37): avc: denied { map } for pid=7946 comm="syz-execprog" path="/sys/kernel/debug/kcov" dev="debugfs" ino=103 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:debugfs_t:s0 tclass=file permissive=1 2019/04/19 19:14:08 executed programs: 0 [ 805.759116] IPVS: ftp: loaded support on port[0] = 21 [ 805.821125] chnl_net:caif_netlink_parms(): no params data found [ 805.850792] bridge0: port 1(bridge_slave_0) entered blocking state [ 805.857943] bridge0: port 1(bridge_slave_0) entered disabled state [ 805.865423] device bridge_slave_0 entered promiscuous mode [ 805.873300] bridge0: port 2(bridge_slave_1) entered blocking state [ 805.880216] bridge0: port 2(bridge_slave_1) entered disabled state [ 805.887861] device bridge_slave_1 entered promiscuous mode [ 805.903717] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 805.912760] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 805.930019] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 805.937658] team0: Port device team_slave_0 added [ 805.943172] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 805.950353] team0: Port device team_slave_1 added [ 805.955674] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 805.963381] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 806.043650] device hsr_slave_0 entered promiscuous mode [ 806.101911] device hsr_slave_1 entered promiscuous mode [ 806.142114] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 806.149285] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 806.163321] bridge0: port 2(bridge_slave_1) entered blocking state [ 806.170096] bridge0: port 2(bridge_slave_1) entered forwarding state [ 806.177236] bridge0: port 1(bridge_slave_0) entered blocking state [ 806.183683] bridge0: port 1(bridge_slave_0) entered forwarding state [ 806.214949] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 806.221076] 8021q: adding VLAN 0 to HW filter on device bond0 [ 806.230676] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 806.239391] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 806.259919] bridge0: port 1(bridge_slave_0) entered disabled state [ 806.267343] bridge0: port 2(bridge_slave_1) entered disabled state [ 806.275769] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 806.286617] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 806.293143] 8021q: adding VLAN 0 to HW filter on device team0 [ 806.303728] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 806.312783] bridge0: port 1(bridge_slave_0) entered blocking state [ 806.319689] bridge0: port 1(bridge_slave_0) entered forwarding state [ 806.342214] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 806.350191] bridge0: port 2(bridge_slave_1) entered blocking state [ 806.356886] bridge0: port 2(bridge_slave_1) entered forwarding state [ 806.364690] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 806.373282] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 806.383103] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 806.393218] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 806.404264] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 806.413580] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 806.419798] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 806.432469] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 806.442852] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 806.452757] audit: type=1400 audit(1555701248.945:38): avc: denied { associate } for pid=7962 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 2019/04/19 19:14:13 executed programs: 50 2019/04/19 19:14:18 executed programs: 109 2019/04/19 19:14:23 executed programs: 166 2019/04/19 19:14:28 executed programs: 226 2019/04/19 19:14:33 executed programs: 287 2019/04/19 19:14:38 executed programs: 347 2019/04/19 19:14:43 executed programs: 405 2019/04/19 19:14:48 executed programs: 468 2019/04/19 19:14:53 executed programs: 525 2019/04/19 19:14:58 executed programs: 581 2019/04/19 19:15:03 executed programs: 645 2019/04/19 19:15:08 executed programs: 715 2019/04/19 19:15:13 executed programs: 788 2019/04/19 19:15:18 executed programs: 847 2019/04/19 19:15:23 executed programs: 898 2019/04/19 19:15:28 executed programs: 953 2019/04/19 19:15:33 executed programs: 1007 2019/04/19 19:15:38 executed programs: 1066 2019/04/19 19:15:43 executed programs: 1123 2019/04/19 19:15:49 executed programs: 1184 2019/04/19 19:15:54 executed programs: 1236 2019/04/19 19:15:59 executed programs: 1293 2019/04/19 19:16:04 executed programs: 1348 2019/04/19 19:16:09 executed programs: 1402 2019/04/19 19:16:14 executed programs: 1456 2019/04/19 19:16:19 executed programs: 1511 2019/04/19 19:16:24 executed programs: 1565 2019/04/19 19:16:29 executed programs: 1620 2019/04/19 19:16:34 executed programs: 1678 2019/04/19 19:16:39 executed programs: 1733 2019/04/19 19:16:44 executed programs: 1787 2019/04/19 19:16:49 executed programs: 1842 2019/04/19 19:16:54 executed programs: 1896 2019/04/19 19:16:59 executed programs: 1954 [ 978.881780] audit: type=1400 audit(1555701421.365:39): avc: denied { map } for pid=16141 comm="sh" path="/bin/dash" dev="sda1" ino=1473 scontext=system_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 2019/04/19 19:17:04 executed programs: 2012 2019/04/19 19:17:09 executed programs: 2071 2019/04/19 19:17:14 executed programs: 2127 2019/04/19 19:17:19 executed programs: 2180 2019/04/19 19:17:24 executed programs: 2237 2019/04/19 19:17:29 executed programs: 2298 2019/04/19 19:17:34 executed programs: 2357 2019/04/19 19:17:40 executed programs: 2411 2019/04/19 19:17:45 executed programs: 2464 2019/04/19 19:17:50 executed programs: 2522 2019/04/19 19:17:55 executed programs: 2575 2019/04/19 19:18:00 executed programs: 2630 2019/04/19 19:18:05 executed programs: 2690 [ 1207.631804] INFO: task syz-executor.0:19220 blocked for more than 140 seconds. [ 1207.639409] Not tainted 4.19.35 #3 [ 1207.645976] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1207.654318] syz-executor.0 D28216 19220 7962 0x80000000 [ 1207.660042] Call Trace: [ 1207.668889] __schedule+0x813/0x1d00 [ 1207.673044] ? pci_mmcfg_check_reserved+0x170/0x170 [ 1207.678079] ? rwsem_down_read_failed+0x1e1/0x3c0 [ 1207.684385] ? _raw_spin_unlock_irq+0x28/0x90 [ 1207.688992] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1207.694209] schedule+0x92/0x1c0 [ 1207.697603] rwsem_down_read_failed+0x219/0x3c0 [ 1207.703730] ? __rwsem_down_read_failed_common.part.0+0x80/0x80 [ 1207.710042] ? __might_fault+0x12b/0x1e0 [ 1207.714627] call_rwsem_down_read_failed+0x18/0x30 [ 1207.719598] down_read+0x49/0xb0 [ 1207.724539] ? do_exit+0x45b/0x2fa0 [ 1207.728199] do_exit+0x45b/0x2fa0 [ 1207.739307] ? do_group_exit+0x2e9/0x370 [ 1207.744870] ? mm_update_next_owner+0x660/0x660 [ 1207.749583] ? _raw_spin_unlock_irq+0x28/0x90 [ 1207.754494] ? do_group_exit+0x2e9/0x370 [ 1207.758584] ? _raw_spin_unlock_irq+0x28/0x90 [ 1207.764667] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1207.769346] ? trace_hardirqs_on+0x67/0x230 [ 1207.775036] ? kasan_check_read+0x11/0x20 [ 1207.779215] do_group_exit+0x135/0x370 [ 1207.784574] __x64_sys_exit_group+0x44/0x50 [ 1207.788961] do_syscall_64+0x103/0x610 [ 1207.793271] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1207.798477] RIP: 0033:0x458c29 [ 1207.803103] Code: Bad RIP value. [ 1207.806477] RSP: 002b:00007ffe1cfdc978 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 1207.814645] RAX: ffffffffffffffda RBX: 000000000000001e RCX: 0000000000458c29 [ 1207.823974] RDX: 00000000004129e1 RSI: fffffffffffffff7 RDI: 0000000000000000 [ 1207.831261] RBP: 0000000000000000 R08: 00000000000ff30d R09: 00007ffe1cfdc9d0 [ 1207.838990] R10: 00000000000ff30d R11: 0000000000000246 R12: 0000000000000001 [ 1207.847832] R13: 00007ffe1cfdc9d0 R14: 0000000000000000 R15: 00007ffe1cfdc9e0 [ 1207.855519] INFO: task syz-executor.0:19222 blocked for more than 140 seconds. [ 1207.864386] Not tainted 4.19.35 #3 [ 1207.868462] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1207.876813] syz-executor.0 D28104 19222 7962 0x80000000 [ 1207.883919] Call Trace: [ 1207.886541] __schedule+0x813/0x1d00 [ 1207.890285] ? pci_mmcfg_check_reserved+0x170/0x170 [ 1207.895755] ? rwsem_down_read_failed+0x1e1/0x3c0 [ 1207.900713] ? _raw_spin_unlock_irq+0x28/0x90 [ 1207.907647] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1207.912619] schedule+0x92/0x1c0 [ 1207.916009] rwsem_down_read_failed+0x219/0x3c0 [ 1207.920693] ? __rwsem_down_read_failed_common.part.0+0x80/0x80 [ 1207.928232] ? __might_fault+0x12b/0x1e0 [ 1207.932680] call_rwsem_down_read_failed+0x18/0x30 [ 1207.937633] down_read+0x49/0xb0 [ 1207.941007] ? do_exit+0x45b/0x2fa0 [ 1207.946217] do_exit+0x45b/0x2fa0 [ 1207.949690] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 1207.955051] ? trace_hardirqs_on+0x67/0x230 [ 1207.959461] ? get_signal+0x331/0x1d50 [ 1207.964750] ? mm_update_next_owner+0x660/0x660 [ 1207.969448] ? _raw_spin_unlock_irq+0x28/0x90 [ 1207.974343] ? get_signal+0x331/0x1d50 [ 1207.978257] ? _raw_spin_unlock_irq+0x28/0x90 [ 1207.984257] do_group_exit+0x135/0x370 [ 1207.988205] get_signal+0x399/0x1d50 [ 1207.992304] ? __might_fault+0x12b/0x1e0 [ 1207.996440] do_signal+0x95/0x1950 [ 1207.999999] ? setup_sigcontext+0x7d0/0x7d0 [ 1208.005764] ? kasan_check_read+0x11/0x20 [ 1208.009994] ? _copy_to_user+0xc9/0x120 [ 1208.014534] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 1208.020136] ? __x64_sys_futex+0x40d/0x590 [ 1208.025828] ? exit_to_usermode_loop+0x43/0x2c0 [ 1208.030524] ? do_syscall_64+0x52d/0x610 [ 1208.035834] ? exit_to_usermode_loop+0x43/0x2c0 [ 1208.040534] ? lockdep_hardirqs_on+0x415/0x5d0 [ 1208.046547] ? trace_hardirqs_on+0x67/0x230 [ 1208.050903] exit_to_usermode_loop+0x244/0x2c0 [ 1208.055884] do_syscall_64+0x52d/0x610 [ 1208.059799] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1208.066382] RIP: 0033:0x458c29 [ 1208.069600] Code: Bad RIP value. [ 1208.073367] RSP: 002b:00007feb174e8cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 1208.081130] RAX: fffffffffffffe00 RBX: 000000000073bf08 RCX: 0000000000458c29 [ 1208.089992] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000073bf08 [ 1208.097635] RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 [ 1208.106299] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000073bf0c [ 1208.113924] R13: 00007ffe1cfdc77f R14: 00007feb174e99c0 R15: 000000000073bf0c [ 1208.121227] [ 1208.121227] Showing all locks held in the system: [ 1208.129102] 1 lock held by khungtaskd/1032: [ 1208.133764] #0: 00000000ef55191f (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e [ 1208.143935] 1 lock held by rsyslogd/7797: [ 1208.148103] #0: 00000000b54da6b2 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 1208.156607] 2 locks held by getty/7918: [ 1208.160598] #0: 0000000025018d50 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1208.171353] #1: 0000000049aade4d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1208.180837] 2 locks held by getty/7919: [ 1208.186275] #0: 00000000f903b525 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1208.194979] #1: 00000000c64ddf73 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1208.205322] 2 locks held by getty/7920: [ 1208.209310] #0: 00000000f421e999 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1208.218142] #1: 00000000c8ec4485 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1208.228493] 2 locks held by getty/7921: [ 1208.232794] #0: 000000009c802e23 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1208.241183] #1: 00000000019a0936 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1208.251568] 2 locks held by getty/7922: [ 1208.255845] #0: 00000000b6d73941 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1208.265641] #1: 00000000505a2f2c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1208.276478] 2 locks held by getty/7923: [ 1208.280465] #0: 00000000de1ee6f2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1208.290236] #1: 0000000062b67cb5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1208.300460] 2 locks held by getty/7924: [ 1208.305983] #0: 00000000190febcc (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 1208.314644] #1: 000000003414bc19 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b30 [ 1208.324977] 1 lock held by syz-executor.0/19220: [ 1208.329746] #0: 000000007b8c77fb (&mm->mmap_sem){++++}, at: do_exit+0x45b/0x2fa0 [ 1208.337843] 1 lock held by syz-executor.0/19222: [ 1208.344146] #0: 000000007b8c77fb (&mm->mmap_sem){++++}, at: do_exit+0x45b/0x2fa0 [ 1208.352311] 1 lock held by syz-executor.0/19223: [ 1208.357080] [ 1208.358705] ============================================= [ 1208.358705] [ 1208.367186] NMI backtrace for cpu 0 [ 1208.370832] CPU: 0 PID: 1032 Comm: khungtaskd Not tainted 4.19.35 #3 [ 1208.377351] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1208.386744] Call Trace: [ 1208.389429] dump_stack+0x172/0x1f0 [ 1208.393084] nmi_cpu_backtrace.cold+0x63/0xa4 [ 1208.397667] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 1208.402614] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 1208.408084] arch_trigger_cpumask_backtrace+0x14/0x20 [ 1208.413291] watchdog+0x9c6/0xec0 [ 1208.416823] kthread+0x357/0x430 [ 1208.420209] ? reset_hung_task_detector+0x30/0x30 [ 1208.425060] ? kthread_delayed_work_timer_fn+0x290/0x290 [ 1208.430646] ret_from_fork+0x3a/0x50 [ 1208.434503] Sending NMI from CPU 0 to CPUs 1: [ 1208.439840] NMI backtrace for cpu 1 [ 1208.439847] CPU: 1 PID: 19223 Comm: syz-executor.0 Not tainted 4.19.35 #3 [ 1208.439854] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1208.439858] RIP: 0010:debug_lockdep_rcu_enabled+0x2e/0xa0 [ 1208.439870] Code: 3b 3b 89 55 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 e0 07 48 89 e5 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 04 84 d2 75 49 <8b> 15 3c d3 e2 07 85 d2 74 3b 48 c7 c0 c0 9b b0 88 48 ba 00 00 00 [ 1208.439875] RSP: 0018:ffff88807bb3f8a0 EFLAGS: 00000046 [ 1208.439884] RAX: 0000000000000003 RBX: ffff88808ddec400 RCX: 1ffffffff1276762 [ 1208.439890] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88808ddecc7c [ 1208.439895] RBP: ffff88807bb3f8a0 R08: 0000000000000001 R09: 0000000000000000 [ 1208.439901] R10: ffff88807bb3faa0 R11: 0000000000000001 R12: ffff88809898e750 [ 1208.439907] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 1208.439913] FS: 00007feb174c8700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 1208.439918] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1208.439924] CR2: ffffffffff600400 CR3: 0000000099285000 CR4: 00000000001406e0 [ 1208.439927] Call Trace: [ 1208.439931] lock_acquire+0x2f3/0x3f0 [ 1208.439935] ? perf_mmap+0x738/0x1730 [ 1208.439939] __mutex_lock+0xf7/0x1300 [ 1208.439943] ? perf_mmap+0x738/0x1730 [ 1208.439947] ? perf_mmap+0x738/0x1730 [ 1208.439951] ? lock_downgrade+0x810/0x810 [ 1208.439955] ? mutex_trylock+0x1e0/0x1e0 [ 1208.439959] ? __asan_store16+0x80/0x80 [ 1208.439963] ? kasan_check_write+0x14/0x20 [ 1208.439967] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 1208.439971] ? retint_kernel+0x2d/0x2d [ 1208.439976] ? wait_for_completion+0x440/0x440 [ 1208.439980] mutex_lock_nested+0x16/0x20 [ 1208.439984] ? mutex_lock_nested+0x16/0x20 [ 1208.439987] perf_mmap+0x738/0x1730 [ 1208.439991] ? perf_release+0x50/0x50 [ 1208.439995] ? do_munmap+0x893/0xed0 [ 1208.439999] ? memset+0x32/0x40 [ 1208.440003] mmap_region+0xc34/0x1760 [ 1208.440007] ? __x64_sys_brk+0x6c0/0x6c0 [ 1208.440012] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 1208.440016] ? get_unmapped_area+0x295/0x3b0 [ 1208.440019] do_mmap+0x8e2/0x1080 [ 1208.440023] vm_mmap_pgoff+0x1c5/0x230 [ 1208.440027] ? vma_is_stack_for_current+0xd0/0xd0 [ 1208.440031] ? iterate_fd+0x360/0x360 [ 1208.440035] ? _copy_to_user+0xc9/0x120 [ 1208.440039] ksys_mmap_pgoff+0x4aa/0x630 [ 1208.440043] ? find_mergeable_anon_vma+0x2e0/0x2e0 [ 1208.440047] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1208.440052] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1208.440055] ? do_syscall_64+0x26/0x610 [ 1208.440060] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1208.440064] __x64_sys_mmap+0xe9/0x1b0 [ 1208.440068] do_syscall_64+0x103/0x610 [ 1208.440072] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1208.440076] RIP: 0033:0x458c29 [ 1208.440087] 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 [ 1208.440091] RSP: 002b:00007feb174c7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 [ 1208.440101] RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000458c29 [ 1208.440106] RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffd000 [ 1208.440112] RBP: 000000000073bfa0 R08: 0000000000000003 R09: 0000000000000000 [ 1208.440117] R10: 0000000000001011 R11: 0000000000000246 R12: 00007feb174c86d4 [ 1208.440123] R13: 00000000004c4bb0 R14: 00000000004d87f8 R15: 00000000ffffffff [ 1208.442723] Kernel panic - not syncing: hung_task: blocked tasks [ 1208.773919] CPU: 0 PID: 1032 Comm: khungtaskd Not tainted 4.19.35 #3 [ 1208.780413] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1208.789769] Call Trace: [ 1208.792394] dump_stack+0x172/0x1f0 [ 1208.796103] panic+0x263/0x51d [ 1208.799307] ? __warn_printk+0xf3/0xf3 [ 1208.803200] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 1208.808139] ? ___preempt_schedule+0x16/0x18 [ 1208.812557] ? nmi_trigger_cpumask_backtrace+0x165/0x1f8 [ 1208.818027] ? nmi_trigger_cpumask_backtrace+0x1c1/0x1f8 [ 1208.823482] ? nmi_trigger_cpumask_backtrace+0x1cb/0x1f8 [ 1208.828939] ? nmi_trigger_cpumask_backtrace+0x165/0x1f8 [ 1208.834406] watchdog+0x9d7/0xec0 [ 1208.837881] kthread+0x357/0x430 [ 1208.841253] ? reset_hung_task_detector+0x30/0x30 [ 1208.846103] ? kthread_delayed_work_timer_fn+0x290/0x290 [ 1208.851565] ret_from_fork+0x3a/0x50 [ 1208.856175] Kernel Offset: disabled [ 1208.859803] Rebooting in 86400 seconds..