[ 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... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.37' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 456.222322][ T6861] block nbd0: shutting down sockets [ 486.389490][ T3461] block nbd0: Possible stuck request 000000003ddbe9c7: control (read@0,4096B). Runtime 30 seconds [ 516.469530][ T3461] block nbd0: Possible stuck request 000000003ddbe9c7: control (read@0,4096B). Runtime 60 seconds [ 546.549499][ T3461] block nbd0: Possible stuck request 000000003ddbe9c7: control (read@0,4096B). Runtime 90 seconds [ 576.629460][ T3461] block nbd0: Possible stuck request 000000003ddbe9c7: control (read@0,4096B). Runtime 120 seconds [ 606.709480][ T3461] block nbd0: Possible stuck request 000000003ddbe9c7: control (read@0,4096B). Runtime 150 seconds [ 616.309548][ T1169] INFO: task syz-executor714:6870 blocked for more than 143 seconds. [ 616.317719][ T1169] Not tainted 5.9.0-rc1-syzkaller #0 [ 616.324290][ T1169] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.333223][ T1169] task:syz-executor714 state:D stack:27776 pid: 6870 ppid: 6859 flags:0x00004004 [ 616.342596][ T1169] Call Trace: [ 616.345999][ T1169] __schedule+0x8e5/0x21e0 [ 616.350471][ T1169] ? io_schedule_timeout+0x140/0x140 [ 616.355853][ T1169] ? mark_held_locks+0x9f/0xe0 [ 616.360737][ T1169] ? wait_on_page_bit_common+0x52c/0xca0 [ 616.366401][ T1169] schedule+0xd0/0x2a0 [ 616.370511][ T1169] io_schedule+0xb5/0x120 [ 616.374865][ T1169] wait_on_page_bit_common+0x52c/0xca0 [ 616.380390][ T1169] ? replace_page_cache_page+0x1620/0x1620 [ 616.386290][ T1169] ? filemap_fdatawait_keep_errors+0xe0/0xe0 [ 616.392321][ T1169] ? pagecache_get_page+0x22b/0xf70 [ 616.397537][ T1169] do_read_cache_page+0x257/0x1390 [ 616.402820][ T1169] read_part_sector+0xf6/0x5af [ 616.407612][ T1169] ? adfspart_check_ADFS+0x7f0/0x7f0 [ 616.412935][ T1169] adfspart_check_ICS+0x9d/0xc90 [ 616.417932][ T1169] ? pointer+0x970/0x970 [ 616.422257][ T1169] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 616.427818][ T1169] ? adfspart_check_ADFS+0x7f0/0x7f0 [ 616.433143][ T1169] ? snprintf+0xbb/0xf0 [ 616.437301][ T1169] ? vsprintf+0x30/0x30 [ 616.442277][ T1169] ? adfspart_check_ADFS+0x7f0/0x7f0 [ 616.447563][ T1169] blk_add_partitions+0x44b/0xe10 [ 616.452744][ T1169] bdev_disk_changed+0x1ea/0x370 [ 616.457715][ T1169] __blkdev_get+0xee4/0x1aa0 [ 616.462353][ T1169] ? freeze_bdev+0x250/0x250 [ 616.466951][ T1169] ? do_raw_spin_unlock+0x171/0x230 [ 616.472206][ T1169] blkdev_open+0x227/0x300 [ 616.476667][ T1169] do_dentry_open+0x4b9/0x11b0 [ 616.481486][ T1169] ? blkdev_get_by_path+0x100/0x100 [ 616.486759][ T1169] path_openat+0x1b9a/0x2730 [ 616.491431][ T1169] ? path_lookupat+0x830/0x830 [ 616.496242][ T1169] ? lock_is_held_type+0xbb/0xf0 [ 616.501225][ T1169] do_filp_open+0x17e/0x3c0 [ 616.505731][ T1169] ? may_open_dev+0xf0/0xf0 [ 616.510280][ T1169] ? do_raw_spin_lock+0x120/0x2b0 [ 616.515307][ T1169] ? rwlock_bug.part.0+0x90/0x90 [ 616.520338][ T1169] ? _raw_spin_unlock+0x24/0x40 [ 616.525231][ T1169] ? __alloc_fd+0x28d/0x600 [ 616.529799][ T1169] do_sys_openat2+0x16d/0x420 [ 616.534473][ T1169] ? build_open_flags+0x650/0x650 [ 616.539553][ T1169] __x64_sys_open+0x119/0x1c0 [ 616.544231][ T1169] ? do_sys_open+0x140/0x140 [ 616.548805][ T1169] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 616.554892][ T1169] ? trace_hardirqs_on+0x5f/0x220 [ 616.559982][ T1169] ? lockdep_hardirqs_on+0x76/0xf0 [ 616.565105][ T1169] do_syscall_64+0x2d/0x70 [ 616.570398][ T1169] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.576288][ T1169] RIP: 0033:0x405811 [ 616.580219][ T1169] Code: Bad RIP value. [ 616.584300][ T1169] RSP: 002b:00007f5b345c8980 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 [ 616.592761][ T1169] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000405811 [ 616.600811][ T1169] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f5b345c8990 [ 616.608786][ T1169] RBP: 6666666666666667 R08: 000000000000000f R09: 00007f5b345c9700 [ 616.616818][ T1169] R10: 00007f5b345c99d0 R11: 0000000000000293 R12: 00000000006dbc4c [ 616.624850][ T1169] R13: 00007fff862724ff R14: 00007f5b345c99c0 R15: 20c49ba5e353f7cf [ 616.632919][ T1169] INFO: task syz-executor714:6871 blocked for more than 143 seconds. [ 616.641035][ T1169] Not tainted 5.9.0-rc1-syzkaller #0 [ 616.646940][ T1169] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.655686][ T1169] task:syz-executor714 state:D stack:28744 pid: 6871 ppid: 6859 flags:0x00000004 [ 616.664958][ T1169] Call Trace: [ 616.668278][ T1169] __schedule+0x8e5/0x21e0 [ 616.672749][ T1169] ? io_schedule_timeout+0x140/0x140 [ 616.678045][ T1169] schedule+0xd0/0x2a0 [ 616.682183][ T1169] schedule_preempt_disabled+0xf/0x20 [ 616.687556][ T1169] __mutex_lock+0x3e2/0x10e0 [ 616.692192][ T1169] ? lock_acquire+0x1f1/0xad0 [ 616.696882][ T1169] ? __blkdev_get+0x4b8/0x1aa0 [ 616.702525][ T1169] ? mutex_lock_io_nested+0xf60/0xf60 [ 616.707909][ T1169] ? _down_write_nest_lock+0x150/0x150 [ 616.713502][ T1169] ? kobj_lookup+0x36f/0x460 [ 616.718109][ T1169] ? disk_block_events+0x1d/0x130 [ 616.723195][ T1169] __blkdev_get+0x4b8/0x1aa0 [ 616.727813][ T1169] ? freeze_bdev+0x250/0x250 [ 616.732462][ T1169] ? do_raw_spin_unlock+0x171/0x230 [ 616.737666][ T1169] blkdev_open+0x227/0x300 [ 616.742181][ T1169] do_dentry_open+0x4b9/0x11b0 [ 616.746976][ T1169] ? blkdev_get_by_path+0x100/0x100 [ 616.752230][ T1169] path_openat+0x1b9a/0x2730 [ 616.756872][ T1169] ? path_lookupat+0x830/0x830 [ 616.761691][ T1169] ? lock_is_held_type+0xbb/0xf0 [ 616.766638][ T1169] do_filp_open+0x17e/0x3c0 [ 616.771185][ T1169] ? may_open_dev+0xf0/0xf0 [ 616.775688][ T1169] ? do_raw_spin_lock+0x120/0x2b0 [ 616.780761][ T1169] ? rwlock_bug.part.0+0x90/0x90 [ 616.785718][ T1169] ? _raw_spin_unlock+0x24/0x40 [ 616.790616][ T1169] ? __alloc_fd+0x28d/0x600 [ 616.795132][ T1169] do_sys_openat2+0x16d/0x420 [ 616.799892][ T1169] ? lock_downgrade+0x830/0x830 [ 616.804767][ T1169] ? build_open_flags+0x650/0x650 [ 616.809849][ T1169] __x64_sys_open+0x119/0x1c0 [ 616.814530][ T1169] ? do_sys_open+0x140/0x140 [ 616.819117][ T1169] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 616.825169][ T1169] ? trace_hardirqs_on+0x5f/0x220 [ 616.830725][ T1169] ? lockdep_hardirqs_on+0x76/0xf0 [ 616.835874][ T1169] do_syscall_64+0x2d/0x70 [ 616.840337][ T1169] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.846225][ T1169] RIP: 0033:0x405811 [ 616.850171][ T1169] Code: Bad RIP value. [ 616.854229][ T1169] RSP: 002b:00007f5b345a7980 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 [ 616.862709][ T1169] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000405811 [ 616.870749][ T1169] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f5b345a7990 [ 616.878720][ T1169] RBP: 6666666666666667 R08: 000000000000000f R09: 0000000000000000 [ 616.889259][ T1169] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000006dbc5c [ 616.897322][ T1169] R13: 00007fff862724ff R14: 00007f5b345a89c0 R15: 20c49ba5e353f7cf [ 616.905393][ T1169] [ 616.905393][ T1169] Showing all locks held in the system: [ 616.913348][ T1169] 1 lock held by khungtaskd/1169: [ 616.918393][ T1169] #0: ffffffff89bd6900 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 616.928318][ T1169] 2 locks held by in:imklog/6549: [ 616.933410][ T1169] 1 lock held by syz-executor714/6870: [ 616.938900][ T1169] #0: ffff88808ab7a380 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x4b8/0x1aa0 [ 616.948450][ T1169] 1 lock held by syz-executor714/6871: [ 616.953983][ T1169] #0: ffff88808ab7a380 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x4b8/0x1aa0 [ 616.964323][ T1169] [ 616.966664][ T1169] ============================================= [ 616.966664][ T1169] [ 616.975138][ T1169] NMI backtrace for cpu 0 [ 616.979562][ T1169] CPU: 0 PID: 1169 Comm: khungtaskd Not tainted 5.9.0-rc1-syzkaller #0 [ 616.987793][ T1169] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.997856][ T1169] Call Trace: [ 617.001187][ T1169] dump_stack+0x18f/0x20d [ 617.005501][ T1169] nmi_cpu_backtrace.cold+0x70/0xb1 [ 617.010734][ T1169] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 617.016352][ T1169] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 617.022351][ T1169] watchdog+0xd7d/0x1000 [ 617.026580][ T1169] ? reset_hung_task_detector+0x30/0x30 [ 617.032190][ T1169] kthread+0x3b5/0x4a0 [ 617.036259][ T1169] ? __kthread_bind_mask+0xc0/0xc0 [ 617.041347][ T1169] ? __kthread_bind_mask+0xc0/0xc0 [ 617.046470][ T1169] ret_from_fork+0x1f/0x30 [ 617.050941][ T1169] Sending NMI from CPU 0 to CPUs 1: [ 617.056276][ C1] NMI backtrace for cpu 1 [ 617.056283][ C1] CPU: 1 PID: 3897 Comm: systemd-journal Not tainted 5.9.0-rc1-syzkaller #0 [ 617.056289][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.056293][ C1] RIP: 0033:0x7f44005e56c9 [ 617.056304][ C1] Code: d7 d1 66 44 0f d7 c2 66 0f d7 cb 48 c1 e2 10 48 c1 e1 10 4c 09 c1 48 c1 e1 20 48 09 ca 48 89 f9 48 31 c1 48 83 e0 c0 48 d3 fa <48> 85 d2 0f 84 7e 00 00 00 48 0f bc c2 c3 66 0f 1f 84 00 00 00 00 [ 617.056309][ C1] RSP: 002b:00007ffd4f611638 EFLAGS: 00000206 [ 617.056317][ C1] RAX: 0000565111e157c0 RBX: 00007ffd4f6140b0 RCX: 0000000000000000 [ 617.056322][ C1] RDX: 000000fffefe0000 RSI: 0000000000000000 RDI: 0000565111e157d0 [ 617.056328][ C1] RBP: 0000000000000000 R08: 00000000000000ff R09: 0000000000000000 [ 617.056333][ C1] R10: 0000000000000069 R11: 00000000ffffffff R12: 0000000000000030 [ 617.056338][ C1] R13: 0000000000000020 R14: 0000000000000004 R15: 0005ad98200e2cb3 [ 617.056343][ C1] FS: 00007f44013848c0 GS: 0000000000000000 [ 617.057158][ T1169] Kernel panic - not syncing: hung_task: blocked tasks [ 617.162018][ T1169] CPU: 0 PID: 1169 Comm: khungtaskd Not tainted 5.9.0-rc1-syzkaller #0 [ 617.170233][ T1169] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.180279][ T1169] Call Trace: [ 617.183565][ T1169] dump_stack+0x18f/0x20d [ 617.187935][ T1169] panic+0x2e3/0x75c [ 617.191826][ T1169] ? __warn_printk+0xf3/0xf3 [ 617.196394][ T1169] ? cpumask_next+0x3c/0x40 [ 617.200918][ T1169] ? printk_safe_flush+0xd6/0x120 [ 617.205923][ T1169] ? watchdog.cold+0x5/0x16b [ 617.210489][ T1169] ? watchdog+0xa82/0x1000 [ 617.214896][ T1169] watchdog.cold+0x16/0x16b [ 617.219389][ T1169] ? reset_hung_task_detector+0x30/0x30 [ 617.224929][ T1169] kthread+0x3b5/0x4a0 [ 617.229160][ T1169] ? __kthread_bind_mask+0xc0/0xc0 [ 617.234249][ T1169] ? __kthread_bind_mask+0xc0/0xc0 [ 617.239354][ T1169] ret_from_fork+0x1f/0x30 [ 617.244875][ T1169] Kernel Offset: disabled [ 617.249214][ T1169] Rebooting in 86400 seconds..