[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.22' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 476.735859][ T6860] block nbd0: shutting down sockets [ 502.327178][ T2459] block nbd0: Possible stuck request 00000000a25deb26: control (read@0,1024B). Runtime 30 seconds [ 502.338108][ T2459] block nbd0: Possible stuck request 00000000d64dcf8e: control (read@1024,1024B). Runtime 30 seconds [ 502.353676][ T2459] block nbd0: Possible stuck request 000000006ea6f336: control (read@2048,1024B). Runtime 30 seconds [ 502.364673][ T2459] block nbd0: Possible stuck request 00000000086b3064: control (read@3072,1024B). Runtime 30 seconds [ 532.403070][ T2459] block nbd0: Possible stuck request 00000000a25deb26: control (read@0,1024B). Runtime 60 seconds [ 532.413791][ T2459] block nbd0: Possible stuck request 00000000d64dcf8e: control (read@1024,1024B). Runtime 60 seconds [ 532.424703][ T2459] block nbd0: Possible stuck request 000000006ea6f336: control (read@2048,1024B). Runtime 60 seconds [ 532.435674][ T2459] block nbd0: Possible stuck request 00000000086b3064: control (read@3072,1024B). Runtime 60 seconds [ 562.479496][ T2459] block nbd0: Possible stuck request 00000000a25deb26: control (read@0,1024B). Runtime 90 seconds [ 562.490254][ T2459] block nbd0: Possible stuck request 00000000d64dcf8e: control (read@1024,1024B). Runtime 90 seconds [ 562.506049][ T2459] block nbd0: Possible stuck request 000000006ea6f336: control (read@2048,1024B). Runtime 90 seconds [ 562.517029][ T2459] block nbd0: Possible stuck request 00000000086b3064: control (read@3072,1024B). Runtime 90 seconds [ 592.556318][ T2459] block nbd0: Possible stuck request 00000000a25deb26: control (read@0,1024B). Runtime 120 seconds [ 592.567142][ T2459] block nbd0: Possible stuck request 00000000d64dcf8e: control (read@1024,1024B). Runtime 120 seconds [ 592.582214][ T2459] block nbd0: Possible stuck request 000000006ea6f336: control (read@2048,1024B). Runtime 120 seconds [ 592.595402][ T2459] block nbd0: Possible stuck request 00000000086b3064: control (read@3072,1024B). Runtime 120 seconds [ 616.234014][ T1175] INFO: task systemd-udevd:6864 blocked for more than 143 seconds. [ 616.242245][ T1175] Not tainted 5.9.0-rc7-syzkaller #0 [ 616.248480][ T1175] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.257226][ T1175] task:systemd-udevd state:D stack:26264 pid: 6864 ppid: 3926 flags:0x00004100 [ 616.266525][ T1175] Call Trace: [ 616.269952][ T1175] __schedule+0xec9/0x2280 [ 616.274495][ T1175] ? io_schedule_timeout+0x140/0x140 [ 616.279899][ T1175] ? preempt_schedule_thunk+0x16/0x18 [ 616.285323][ T1175] ? preempt_schedule_common+0x59/0xc0 [ 616.290784][ T1175] schedule+0xd0/0x2a0 [ 616.294905][ T1175] io_schedule+0xb5/0x120 [ 616.299313][ T1175] wait_on_page_bit_common+0x32a/0xe30 [ 616.304841][ T1175] ? find_get_pages_contig+0xb30/0xb30 [ 616.310360][ T1175] ? end_buffer_async_read_io+0x2f0/0x2f0 [ 616.316138][ T1175] ? __wait_on_page_locked_async+0x680/0x680 [ 616.322166][ T1175] ? alloc_pages_current+0x199/0x2a0 [ 616.327622][ T1175] ? __page_cache_alloc+0x10b/0x420 [ 616.332827][ T1175] do_read_cache_page+0x957/0x1390 [ 616.338094][ T1175] read_part_sector+0xf6/0x5af [ 616.342868][ T1175] adfspart_check_ICS+0x9d/0xc90 [ 616.348024][ T1175] ? pointer+0x970/0x970 [ 616.352345][ T1175] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 616.357943][ T1175] ? adfspart_check_ADFS+0x7f0/0x7f0 [ 616.363229][ T1175] ? snprintf+0xbb/0xf0 [ 616.367428][ T1175] ? vsprintf+0x30/0x30 [ 616.371586][ T1175] ? adfspart_check_ADFS+0x7f0/0x7f0 [ 616.376932][ T1175] blk_add_partitions+0x45c/0xe40 [ 616.381962][ T1175] bdev_disk_changed+0x1ea/0x370 [ 616.386977][ T1175] __blkdev_get+0xee4/0x1aa0 [ 616.391575][ T1175] ? freeze_bdev+0x250/0x250 [ 616.396287][ T1175] ? do_raw_spin_unlock+0x171/0x230 [ 616.401507][ T1175] blkdev_open+0x227/0x300 [ 616.406050][ T1175] do_dentry_open+0x4b9/0x11b0 [ 616.410836][ T1175] ? blkdev_get_by_path+0x100/0x100 [ 616.416146][ T1175] path_openat+0x1b9a/0x2730 [ 616.420743][ T1175] ? path_lookupat+0x830/0x830 [ 616.425599][ T1175] ? lock_is_held_type+0xbb/0xf0 [ 616.430542][ T1175] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 616.436592][ T1175] ? lock_is_held_type+0xbb/0xf0 [ 616.441529][ T1175] do_filp_open+0x17e/0x3c0 [ 616.446079][ T1175] ? may_open_dev+0xf0/0xf0 [ 616.450589][ T1175] ? do_raw_spin_lock+0x120/0x2b0 [ 616.455661][ T1175] ? rwlock_bug.part.0+0x90/0x90 [ 616.460675][ T1175] ? _raw_spin_unlock+0x24/0x40 [ 616.465604][ T1175] ? __alloc_fd+0x28d/0x600 [ 616.470148][ T1175] do_sys_openat2+0x16d/0x420 [ 616.475149][ T1175] ? build_open_flags+0x650/0x650 [ 616.480223][ T1175] __x64_sys_open+0x119/0x1c0 [ 616.484956][ T1175] ? do_sys_open+0x140/0x140 [ 616.489620][ T1175] ? __secure_computing+0x104/0x360 [ 616.494894][ T1175] do_syscall_64+0x2d/0x70 [ 616.499315][ T1175] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.505267][ T1175] RIP: 0033:0x7f4933015840 [ 616.509679][ T1175] Code: Bad RIP value. [ 616.513907][ T1175] RSP: 002b:00007ffcdc613ca8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 616.522339][ T1175] RAX: ffffffffffffffda RBX: 000055bb7f5cccb0 RCX: 00007f4933015840 [ 616.530377][ T1175] RDX: 000055bb7e21cfe3 RSI: 00000000000a0800 RDI: 000055bb7f5db660 [ 616.538418][ T1175] RBP: 00007ffcdc613e20 R08: 000055bb7e21c670 R09: 0000000000000010 [ 616.546432][ T1175] R10: 000055bb7e21cd0c R11: 0000000000000246 R12: 00007ffcdc613d70 [ 616.554813][ T1175] R13: 000055bb7f5db520 R14: 0000000000000003 R15: 000000000000000e [ 616.562806][ T1175] [ 616.562806][ T1175] Showing all locks held in the system: [ 616.570595][ T1175] 1 lock held by khungtaskd/1175: [ 616.575670][ T1175] #0: ffffffff8a067f40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 616.585606][ T1175] 1 lock held by syz-executor061/6860: [ 616.591063][ T1175] #0: ffff888089c2a300 (&bdev->bd_mutex){+.+.}-{3:3}, at: blkdev_put+0x30/0x520 [ 616.600231][ T1175] 1 lock held by systemd-udevd/6864: [ 616.605563][ T1175] #0: ffff888089c2a300 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x4b8/0x1aa0 [ 616.615093][ T1175] [ 616.617425][ T1175] ============================================= [ 616.617425][ T1175] [ 616.625889][ T1175] NMI backtrace for cpu 0 [ 616.632061][ T1175] CPU: 0 PID: 1175 Comm: khungtaskd Not tainted 5.9.0-rc7-syzkaller #0 [ 616.640271][ T1175] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.651533][ T1175] Call Trace: [ 616.654855][ T1175] dump_stack+0x198/0x1fd [ 616.659193][ T1175] nmi_cpu_backtrace.cold+0x70/0xb1 [ 616.664439][ T1175] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 616.670048][ T1175] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 616.676003][ T1175] watchdog+0xd7d/0x1000 [ 616.680223][ T1175] ? reset_hung_task_detector+0x30/0x30 [ 616.685866][ T1175] kthread+0x3b5/0x4a0 [ 616.689912][ T1175] ? __kthread_bind_mask+0xc0/0xc0 [ 616.695000][ T1175] ret_from_fork+0x1f/0x30 [ 616.699581][ T1175] Sending NMI from CPU 0 to CPUs 1: [ 616.705184][ C1] NMI backtrace for cpu 1 [ 616.705190][ C1] CPU: 1 PID: 3916 Comm: systemd-journal Not tainted 5.9.0-rc7-syzkaller #0 [ 616.705196][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.705200][ C1] RIP: 0010:__lock_acquire+0xd3c/0x5780 [ 616.705211][ C1] Code: 01 00 00 00 0f 86 8e 00 00 00 89 05 be 9f 69 0b e9 83 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 80 3c 02 00 <0f> 85 df 31 00 00 49 81 3e 00 a5 9a 8c 0f 84 95 f3 ff ff 41 83 fc [ 616.705215][ C1] RSP: 0018:ffffc900054d7cd8 EFLAGS: 00000046 [ 616.705222][ C1] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000002 [ 616.705227][ C1] RDX: 1ffffffff140cfe8 RSI: 0000000000000000 RDI: ffffffff8a067f40 [ 616.705232][ C1] RBP: ffff888092bee140 R08: 0000000000000001 R09: 0000000000000000 [ 616.705237][ C1] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 616.705242][ C1] R13: 0000000000000000 R14: ffffffff8a067f40 R15: 0000000000000002 [ 616.705247][ C1] FS: 00007f2f8144b8c0(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 616.705251][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 616.705256][ C1] CR2: 00007f2f7e7f0000 CR3: 00000000924e4000 CR4: 00000000001506e0 [ 616.705261][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 616.705266][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 616.705268][ C1] Call Trace: [ 616.705272][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 616.705275][ C1] ? __seccomp_filter+0x256/0x1550 [ 616.705278][ C1] lock_acquire+0x1f3/0xaf0 [ 616.705281][ C1] ? pid_task+0x140/0x140 [ 616.705284][ C1] ? lock_release+0x8f0/0x8f0 [ 616.705288][ C1] ? exit_to_user_mode_prepare+0x1cf/0x200 [ 616.705291][ C1] __task_pid_nr_ns+0x3d/0x4b0 [ 616.705294][ C1] ? pid_task+0x140/0x140 [ 616.705297][ C1] __do_sys_getpid+0x1a/0x20 [ 616.705300][ C1] do_syscall_64+0x2d/0x70 [ 616.705304][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.705307][ C1] RIP: 0033:0x7f2f806e4f17 [ 616.705318][ C1] Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 [ 616.705321][ C1] RSP: 002b:00007ffdf5f7a2f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000027 [ 616.705330][ C1] RAX: ffffffffffffffda RBX: 0000561cdd8161e0 RCX: 00007f2f806e4f17 [ 616.705334][ C1] RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000561cdd8161e0 [ 616.705339][ C1] RBP: 0000000000000f4c R08: 0000561cdd81ff80 R09: 00007ffdf5fba080 [ 616.705344][ C1] R10: 00000000000134c2 R11: 0000000000000202 R12: ffffffffffffffff [ 616.705348][ C1] R13: 00007ffdf5f7a388 R14: 0000561cdd7ab958 R15: 0005b0630b411e98 [ 616.705829][ T1175] Kernel panic - not syncing: hung_task: blocked tasks [ 616.975065][ T1175] CPU: 0 PID: 1175 Comm: khungtaskd Not tainted 5.9.0-rc7-syzkaller #0 [ 616.983273][ T1175] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.993299][ T1175] Call Trace: [ 616.996572][ T1175] dump_stack+0x198/0x1fd [ 617.000953][ T1175] panic+0x382/0x7fb [ 617.004860][ T1175] ? __warn_printk+0xf3/0xf3 [ 617.009469][ T1175] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 617.015079][ T1175] ? preempt_schedule_thunk+0x16/0x18 [ 617.020425][ T1175] ? watchdog.cold+0x5/0x16b [ 617.024988][ T1175] ? watchdog+0xa82/0x1000 [ 617.029401][ T1175] watchdog.cold+0x16/0x16b [ 617.033882][ T1175] ? reset_hung_task_detector+0x30/0x30 [ 617.039492][ T1175] kthread+0x3b5/0x4a0 [ 617.043536][ T1175] ? __kthread_bind_mask+0xc0/0xc0 [ 617.048625][ T1175] ret_from_fork+0x1f/0x30 [ 617.054370][ T1175] Kernel Offset: disabled [ 617.058694][ T1175] Rebooting in 86400 seconds..