[ 64.168349][ T26] audit: type=1800 audit(1565169721.690:27): pid=9665 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 64.199753][ T26] audit: type=1800 audit(1565169721.700:28): pid=9665 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 65.066192][ T26] audit: type=1800 audit(1565169722.660:29): pid=9665 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 65.086220][ T26] audit: type=1800 audit(1565169722.660:30): pid=9665 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.191' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 510.852786][ T1057] INFO: task syz-executor565:9837 blocked for more than 143 seconds. [ 510.860921][ T1057] Not tainted 5.3.0-rc3+ #100 [ 510.866653][ T1057] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 510.875525][ T1057] syz-executor565 D28384 9837 9817 0x00004004 [ 510.881858][ T1057] Call Trace: [ 510.888913][ T1057] __schedule+0x755/0x1580 [ 510.893634][ T1057] ? __sched_text_start+0x8/0x8 [ 510.898481][ T1057] ? rwlock_bug.part.0+0x90/0x90 [ 510.903597][ T1057] ? rwsem_down_read_slowpath+0x2b8/0xfb0 [ 510.909315][ T1057] schedule+0xa8/0x270 [ 510.913573][ T1057] rwsem_down_read_slowpath+0x4cc/0xfb0 [ 510.919120][ T1057] ? down_write_killable_nested+0x180/0x180 [ 510.925194][ T1057] ? mark_held_locks+0xf0/0xf0 [ 510.929955][ T1057] ? free_object+0x9/0x70 [ 510.934488][ T1057] ? __hrtimer_init+0xe1/0x250 [ 510.939250][ T1057] ? lock_acquire+0x190/0x410 [ 510.944101][ T1057] ? __do_page_fault+0xaa2/0xdd0 [ 510.949125][ T1057] down_read+0x1f4/0x3f0 [ 510.953537][ T1057] ? down_read+0xa3/0x3f0 [ 510.957859][ T1057] ? down_read+0x1f4/0x3f0 [ 510.962351][ T1057] ? down_read_trylock+0x9b/0x1a0 [ 510.967713][ T1057] ? down_read_killable+0x460/0x460 [ 510.973098][ T1057] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 510.979329][ T1057] ? trace_hardirqs_on+0x67/0x240 [ 510.984529][ T1057] __do_page_fault+0xaa2/0xdd0 [ 510.989311][ T1057] ? page_fault+0x16/0x40 [ 510.993830][ T1057] do_page_fault+0x38/0x590 [ 510.998331][ T1057] page_fault+0x39/0x40 [ 511.002474][ T1057] RIP: 0033:0x4ab79d [ 511.006583][ T1057] Code: Bad RIP value. [ 511.010642][ T1057] RSP: 002b:00007ffef0912cf0 EFLAGS: 00010206 [ 511.016888][ T1057] RAX: 00000000004ab8c0 RBX: 0000000000000001 RCX: 00000000006e0330 [ 511.025023][ T1057] RDX: 0000000000407620 RSI: 0000000000000000 RDI: 00000000004ccb90 [ 511.033159][ T1057] RBP: 00007ffef0912d10 R08: 000000037ffffa00 R09: 000000037ffffa00 [ 511.041121][ T1057] R10: 00007ffef0912d80 R11: 0000000000000000 R12: 0000000000000001 [ 511.049279][ T1057] R13: 00000000006e0320 R14: 000000000000002d R15: 20c49ba5e353f7cf [ 511.057436][ T1057] INFO: lockdep is turned off. [ 511.062190][ T1057] NMI backtrace for cpu 0 [ 511.066535][ T1057] CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc3+ #100 [ 511.074236][ T1057] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 511.084800][ T1057] Call Trace: [ 511.088157][ T1057] dump_stack+0x172/0x1f0 [ 511.092481][ T1057] nmi_cpu_backtrace.cold+0x70/0xb2 [ 511.097669][ T1057] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 511.103902][ T1057] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 511.109524][ T1057] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 511.115498][ T1057] arch_trigger_cpumask_backtrace+0x14/0x20 [ 511.121416][ T1057] watchdog+0x9d0/0xef0 [ 511.125572][ T1057] kthread+0x361/0x430 [ 511.129633][ T1057] ? reset_hung_task_detector+0x30/0x30 [ 511.135171][ T1057] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 511.141402][ T1057] ret_from_fork+0x24/0x30 [ 511.145867][ T1057] Sending NMI from CPU 0 to CPUs 1: [ 511.151420][ C1] NMI backtrace for cpu 1 [ 511.151426][ C1] CPU: 1 PID: 9839 Comm: syz-executor565 Not tainted 5.3.0-rc3+ #100 [ 511.151431][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 511.151434][ C1] RIP: 0010:check_memory_region+0x45/0x1a0 [ 511.151444][ C1] Code: 89 e5 41 55 41 54 53 0f 86 07 01 00 00 4c 8d 5c 37 ff 49 89 f8 48 b8 00 00 00 00 00 fc ff df 4d 89 da 49 c1 e8 03 4d 8d 24 00 <49> c1 ea 03 49 01 c2 4c 89 e0 49 8d 5a 01 49 89 d9 4d 29 e1 49 83 [ 511.151448][ C1] RSP: 0018:ffff88808e20fa68 EFLAGS: 00000a02 [ 511.151455][ C1] RAX: dffffc0000000000 RBX: ffff888093470868 RCX: ffffffff818ae252 [ 511.151459][ C1] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888093470868 [ 511.151463][ C1] RBP: ffff88808e20fa80 R08: 1ffff1101268e10d R09: ffffed10119560cf [ 511.151467][ C1] R10: ffff88809347086b R11: ffff88809347086b R12: ffffed101268e10d [ 511.151472][ C1] R13: ffff88808e20fb70 R14: 0000000000000002 R15: ffff88808cab0670 [ 511.151476][ C1] FS: 00007f3a14287700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 511.151480][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 511.151484][ C1] CR2: ffffffffff600400 CR3: 00000000923f3000 CR4: 00000000001406e0 [ 511.151488][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 511.151493][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 511.151495][ C1] Call Trace: [ 511.151498][ C1] __kasan_check_read+0x11/0x20 [ 511.151500][ C1] perf_mmap+0x7c2/0x19b0 [ 511.151503][ C1] ? perf_release+0x50/0x50 [ 511.151506][ C1] ? memset+0x32/0x40 [ 511.151509][ C1] mmap_region+0xc35/0x1760 [ 511.151511][ C1] ? __x64_sys_brk+0x760/0x760 [ 511.151515][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 511.151518][ C1] ? get_unmapped_area+0x2ad/0x3d0 [ 511.151521][ C1] do_mmap+0x82e/0x1090 [ 511.151524][ C1] vm_mmap_pgoff+0x1c5/0x230 [ 511.151527][ C1] ? vma_is_stack_for_current+0xd0/0xd0 [ 511.151530][ C1] ? ksys_dup3+0x3e0/0x3e0 [ 511.151533][ C1] ? finish_task_switch+0x147/0x720 [ 511.151536][ C1] ksys_mmap_pgoff+0x4aa/0x630 [ 511.151540][ C1] ? find_mergeable_anon_vma+0x2e0/0x2e0 [ 511.151543][ C1] ? __kasan_check_write+0x14/0x20 [ 511.151546][ C1] ? switch_fpu_return+0x1fa/0x4f0 [ 511.151549][ C1] __x64_sys_mmap+0xe9/0x1b0 [ 511.151552][ C1] do_syscall_64+0xfd/0x6a0 [ 511.151555][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 511.151558][ C1] RIP: 0033:0x4468f9 [ 511.151567][ C1] Code: e8 5c b3 02 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 0b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 511.151571][ C1] RSP: 002b:00007f3a14286da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 [ 511.151578][ C1] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 00000000004468f9 [ 511.151582][ C1] RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffd000 [ 511.151587][ C1] RBP: 00000000006dbc30 R08: 0000000000000003 R09: 0000000000000000 [ 511.151591][ C1] R10: 0000000000001011 R11: 0000000000000246 R12: 00000000006dbc3c [ 511.151595][ C1] R13: 00007ffef0912cef R14: 00007f3a142879c0 R15: 20c49ba5e353f7cf [ 511.158392][ T1057] Kernel panic - not syncing: hung_task: blocked tasks [ 511.463676][ T1057] CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc3+ #100 [ 511.471383][ T1057] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 511.481429][ T1057] Call Trace: [ 511.484722][ T1057] dump_stack+0x172/0x1f0 [ 511.489049][ T1057] panic+0x2dc/0x755 [ 511.496791][ T1057] ? add_taint.cold+0x16/0x16 [ 511.501459][ T1057] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 511.507171][ T1057] ? ___preempt_schedule+0x16/0x20 [ 511.512282][ T1057] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 511.518447][ T1057] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b [ 511.524594][ T1057] ? nmi_trigger_cpumask_backtrace+0x256/0x28b [ 511.530738][ T1057] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 511.536886][ T1057] watchdog+0x9e1/0xef0 [ 511.541044][ T1057] kthread+0x361/0x430 [ 511.545103][ T1057] ? reset_hung_task_detector+0x30/0x30 [ 511.550639][ T1057] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 511.556870][ T1057] ret_from_fork+0x24/0x30 [ 511.563244][ T1057] Kernel Offset: disabled [ 511.567567][ T1057] Rebooting in 86400 seconds..