[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.118' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 1001.291608] INFO: task systemd-udevd:4629 blocked for more than 140 seconds. [ 1001.291616] Not tainted 4.14.232-syzkaller #0 [ 1001.291619] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1001.291624] systemd-udevd D25976 4629 1 0x00000104 [ 1001.291643] Call Trace: [ 1001.291665] __schedule+0x88b/0x1de0 [ 1001.291677] ? __lock_acquire+0x5fc/0x3f20 [ 1001.333837] ? io_schedule_timeout+0x140/0x140 [ 1001.339402] ? lock_downgrade+0x740/0x740 [ 1001.344530] schedule+0x8d/0x1b0 [ 1001.348954] schedule_preempt_disabled+0xf/0x20 [ 1001.354287] __mutex_lock+0x669/0x1310 [ 1001.358367] ? __blkdev_get+0x191/0x1090 [ 1001.363006] ? __mutex_lock+0x270/0x1310 [ 1001.367483] ? lo_open+0x19/0xb0 [ 1001.371387] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1001.377033] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1001.383165] ? disk_get_part+0x95/0x140 [ 1001.387376] ? loop_unregister_transfer+0x90/0x90 [ 1001.393536] lo_open+0x19/0xb0 [ 1001.397069] __blkdev_get+0x306/0x1090 [ 1001.401106] ? lookup_fast+0x430/0xe30 [ 1001.405629] ? sb_min_blocksize+0x1d0/0x1d0 [ 1001.410713] ? fsnotify+0x974/0x11b0 [ 1001.414584] blkdev_get+0x88/0x890 [ 1001.418491] ? __blkdev_get+0x1090/0x1090 [ 1001.423805] ? lock_downgrade+0x740/0x740 [ 1001.428361] ? do_raw_spin_unlock+0x164/0x220 [ 1001.434116] ? _raw_spin_unlock+0x29/0x40 [ 1001.439380] blkdev_open+0x1cc/0x250 [ 1001.443537] ? security_file_open+0x82/0x190 [ 1001.449541] do_dentry_open+0x44b/0xec0 [ 1001.453986] ? blkdev_get_by_dev+0x70/0x70 [ 1001.458831] vfs_open+0x105/0x220 [ 1001.463728] path_openat+0x628/0x2970 [ 1001.468746] ? path_lookupat+0x780/0x780 [ 1001.473849] ? trace_hardirqs_on+0x10/0x10 [ 1001.479285] ? trace_hardirqs_on+0x10/0x10 [ 1001.485931] do_filp_open+0x179/0x3c0 [ 1001.490954] ? may_open_dev+0xe0/0xe0 [ 1001.495459] ? lock_downgrade+0x740/0x740 [ 1001.500956] ? do_raw_spin_unlock+0x164/0x220 [ 1001.507304] ? _raw_spin_unlock+0x29/0x40 [ 1001.512547] ? __alloc_fd+0x1be/0x490 [ 1001.517171] do_sys_open+0x296/0x410 [ 1001.521153] ? filp_open+0x60/0x60 [ 1001.525102] ? do_syscall_64+0x4c/0x640 [ 1001.530149] ? do_sys_open+0x410/0x410 [ 1001.534785] do_syscall_64+0x1d5/0x640 [ 1001.539251] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1001.544533] RIP: 0033:0x7f7fc86c7840 [ 1001.548700] RSP: 002b:00007ffdcf6409d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 1001.557488] RAX: ffffffffffffffda RBX: 00007ffdcf640a70 RCX: 00007f7fc86c7840 [ 1001.566310] RDX: 0000562fad0e6fe3 RSI: 00000000000a0800 RDI: 0000562fad345f20 [ 1001.574102] RBP: 00007ffdcf640f00 R08: 0000562fad0e6670 R09: 0000000000000010 [ 1001.582853] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdcf640b80 [ 1001.591880] R13: 0000562fad22a010 R14: 0000562fad271b70 R15: 00007ffdcf640a50 [ 1001.600244] INFO: task systemd-udevd:8147 blocked for more than 140 seconds. [ 1001.607930] Not tainted 4.14.232-syzkaller #0 [ 1001.613384] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1001.621887] systemd-udevd D28496 8147 4629 0x00000100 [ 1001.628878] Call Trace: [ 1001.631704] __schedule+0x88b/0x1de0 [ 1001.635853] ? io_schedule_timeout+0x140/0x140 [ 1001.640523] ? lock_downgrade+0x740/0x740 [ 1001.645002] schedule+0x8d/0x1b0 [ 1001.649298] schedule_preempt_disabled+0xf/0x20 [ 1001.654318] __mutex_lock+0x669/0x1310 [ 1001.658864] ? __blkdev_get+0x191/0x1090 [ 1001.663509] ? __mutex_lock+0x270/0x1310 [ 1001.667959] ? lo_open+0x19/0xb0 [ 1001.671990] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1001.678593] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1001.685011] ? exact_match+0x9/0x20 [ 1001.688755] ? kobj_lookup+0x31e/0x400 [ 1001.693670] lo_open+0x19/0xb0 [ 1001.697453] ? loop_unregister_transfer+0x90/0x90 [ 1001.702736] __blkdev_get+0xa8c/0x1090 [ 1001.707036] ? lookup_fast+0x430/0xe30 [ 1001.711596] ? sb_min_blocksize+0x1d0/0x1d0 [ 1001.711605] ? fsnotify+0x974/0x11b0 [ 1001.711615] blkdev_get+0x88/0x890 [ 1001.711625] ? __blkdev_get+0x1090/0x1090 [ 1001.727996] ? lock_downgrade+0x740/0x740 [ 1001.732834] ? do_raw_spin_unlock+0x164/0x220 [ 1001.737994] ? _raw_spin_unlock+0x29/0x40 [ 1001.742500] blkdev_open+0x1cc/0x250 [ 1001.747489] ? security_file_open+0x82/0x190 [ 1001.752325] do_dentry_open+0x44b/0xec0 [ 1001.756623] ? blkdev_get_by_dev+0x70/0x70 [ 1001.761321] vfs_open+0x105/0x220 [ 1001.765103] path_openat+0x628/0x2970 [ 1001.769332] ? path_lookupat+0x780/0x780 [ 1001.773768] ? trace_hardirqs_on+0x10/0x10 [ 1001.778441] do_filp_open+0x179/0x3c0 [ 1001.782483] ? may_open_dev+0xe0/0xe0 [ 1001.787075] ? lock_downgrade+0x740/0x740 [ 1001.791810] ? do_raw_spin_unlock+0x164/0x220 [ 1001.796563] ? _raw_spin_unlock+0x29/0x40 [ 1001.801088] ? __alloc_fd+0x1be/0x490 [ 1001.805563] do_sys_open+0x296/0x410 [ 1001.809959] ? filp_open+0x60/0x60 [ 1001.814736] ? do_syscall_64+0x4c/0x640 [ 1001.819891] ? do_sys_open+0x410/0x410 [ 1001.824524] do_syscall_64+0x1d5/0x640 [ 1001.828602] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1001.834367] RIP: 0033:0x7f7fc86c7840 [ 1001.838513] RSP: 002b:00007ffdcf63b4e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 1001.846385] RAX: ffffffffffffffda RBX: 0000562fad23ebd0 RCX: 00007f7fc86c7840 [ 1001.854761] RDX: 0000562fad0e6fe3 RSI: 0000000000080000 RDI: 0000562fad22b9c0 [ 1001.863137] RBP: 0000000000000001 R08: 0000562fad0e6670 R09: 0000000000000110 [ 1001.871032] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 1001.880354] R13: 0000000000000000 R14: 0000562fad2396e0 R15: 00000000ffffffff [ 1001.889045] INFO: task systemd-udevd:8430 blocked for more than 140 seconds. [ 1001.897223] Not tainted 4.14.232-syzkaller #0 [ 1001.903438] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1001.913031] systemd-udevd D28616 8430 4629 0x00000100 [ 1001.919310] Call Trace: [ 1001.922221] __schedule+0x88b/0x1de0 [ 1001.926436] ? __lock_acquire+0x5fc/0x3f20 [ 1001.930854] ? io_schedule_timeout+0x140/0x140 [ 1001.936010] ? lock_downgrade+0x740/0x740 [ 1001.940493] schedule+0x8d/0x1b0 [ 1001.945042] schedule_preempt_disabled+0xf/0x20 [ 1001.951760] __mutex_lock+0x669/0x1310 [ 1001.956688] ? __blkdev_get+0x191/0x1090 [ 1001.961036] ? __mutex_lock+0x270/0x1310 [ 1001.965534] ? lo_open+0x19/0xb0 [ 1001.969436] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1001.975013] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1001.981606] ? disk_get_part+0x95/0x140 [ 1001.985856] ? loop_unregister_transfer+0x90/0x90 [ 1001.991897] lo_open+0x19/0xb0 [ 1001.995757] __blkdev_get+0x306/0x1090 [ 1002.000688] ? lookup_fast+0x430/0xe30 [ 1002.005099] ? sb_min_blocksize+0x1d0/0x1d0 [ 1002.009603] ? fsnotify+0x974/0x11b0 [ 1002.013566] blkdev_get+0x88/0x890 [ 1002.018758] ? __blkdev_get+0x1090/0x1090 [ 1002.023606] ? lock_downgrade+0x740/0x740 [ 1002.029627] ? do_raw_spin_unlock+0x164/0x220 [ 1002.034541] ? _raw_spin_unlock+0x29/0x40 [ 1002.038913] blkdev_open+0x1cc/0x250 [ 1002.043448] ? security_file_open+0x82/0x190 [ 1002.048940] do_dentry_open+0x44b/0xec0 [ 1002.053344] ? blkdev_get_by_dev+0x70/0x70 [ 1002.058422] vfs_open+0x105/0x220 [ 1002.062431] path_openat+0x628/0x2970 [ 1002.066663] ? path_lookupat+0x780/0x780 [ 1002.071007] ? trace_hardirqs_on+0x10/0x10 [ 1002.075559] do_filp_open+0x179/0x3c0 [ 1002.079662] ? may_open_dev+0xe0/0xe0 [ 1002.084273] ? lock_downgrade+0x740/0x740 [ 1002.089098] ? do_raw_spin_unlock+0x164/0x220 [ 1002.094913] ? _raw_spin_unlock+0x29/0x40 [ 1002.099503] ? __alloc_fd+0x1be/0x490 [ 1002.103599] do_sys_open+0x296/0x410 [ 1002.108175] ? filp_open+0x60/0x60 [ 1002.112196] ? do_syscall_64+0x4c/0x640 [ 1002.116177] ? do_sys_open+0x410/0x410 [ 1002.120051] do_syscall_64+0x1d5/0x640 [ 1002.124022] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1002.129600] RIP: 0033:0x7f7fc86c7840 [ 1002.133608] RSP: 002b:00007ffdcf640318 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 1002.142223] RAX: ffffffffffffffda RBX: 0000562fad2396e0 RCX: 00007f7fc86c7840 [ 1002.150483] RDX: 0000562fad0e6fe3 RSI: 00000000000a0800 RDI: 0000562fad244410 [ 1002.158635] RBP: 00007ffdcf640490 R08: 0000562fad0e6670 R09: 0000000000000010 [ 1002.166809] R10: 0000562fad0e6d0c R11: 0000000000000246 R12: 00007ffdcf6403e0 [ 1002.175135] R13: 0000562fad2442d0 R14: 0000000000000003 R15: 000000000000000e [ 1002.183493] INFO: task syz-executor289:15025 blocked for more than 140 seconds. [ 1002.191517] Not tainted 4.14.232-syzkaller #0 [ 1002.197418] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.206473] syz-executor289 D28912 15025 7987 0x00000004 [ 1002.212839] Call Trace: [ 1002.215693] __schedule+0x88b/0x1de0 [ 1002.219601] ? io_schedule_timeout+0x140/0x140 [ 1002.224868] ? lock_downgrade+0x740/0x740 [ 1002.229840] schedule+0x8d/0x1b0 [ 1002.234135] schedule_preempt_disabled+0xf/0x20 [ 1002.239015] __mutex_lock+0x669/0x1310 [ 1002.243686] ? lo_release+0x1b/0x190 [ 1002.248423] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1002.255391] ? __blkdev_put+0x330/0x800 [ 1002.259665] ? lock_downgrade+0x740/0x740 [ 1002.264465] ? loop_clr_fd+0xc20/0xc20 [ 1002.268441] lo_release+0x1b/0x190 [ 1002.272397] ? loop_clr_fd+0xc20/0xc20 [ 1002.276573] __blkdev_put+0x5aa/0x800 [ 1002.280821] ? revalidate_disk+0x1f0/0x1f0 [ 1002.285736] ? locks_remove_file+0x2cd/0x420 [ 1002.290922] ? blkdev_put+0x75/0x4c0 [ 1002.295423] ? blkdev_put+0x4c0/0x4c0 [ 1002.299810] blkdev_close+0x86/0xb0 [ 1002.303707] __fput+0x25f/0x7a0 [ 1002.308042] task_work_run+0x11f/0x190 [ 1002.312087] exit_to_usermode_loop+0x1ad/0x200 [ 1002.317380] do_syscall_64+0x4a3/0x640 [ 1002.321623] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1002.326902] RIP: 0033:0x402483 [ 1002.330340] RSP: 002b:00007fff00572718 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 1002.339058] RAX: 0000000000000000 RBX: 00007fff00572740 RCX: 0000000000402483 [ 1002.347232] RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000006 [ 1002.355892] RBP: 0000000000000006 R08: 0000000000000001 R09: 00007fff005725b0 [ 1002.364367] R10: 00007fff00572467 R11: 0000000000000246 R12: 0000000000000005 [ 1002.372984] R13: 0000000001a162c0 R14: 00007fff005727c0 R15: 0000000000000008 [ 1002.381662] INFO: task syz-executor289:15027 blocked for more than 140 seconds. [ 1002.390419] Not tainted 4.14.232-syzkaller #0 [ 1002.395956] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.405662] syz-executor289 D28536 15027 7990 0x00000004 [ 1002.412491] Call Trace: [ 1002.416553] __schedule+0x88b/0x1de0 [ 1002.420640] ? io_schedule_timeout+0x140/0x140 [ 1002.425906] ? lock_downgrade+0x740/0x740 [ 1002.430624] schedule+0x8d/0x1b0 [ 1002.434762] schedule_preempt_disabled+0xf/0x20 [ 1002.440044] __mutex_lock+0x669/0x1310 [ 1002.445080] ? lo_release+0x1b/0x190 [ 1002.449049] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1002.456239] ? __blkdev_put+0x330/0x800 [ 1002.460817] ? lock_downgrade+0x740/0x740 [ 1002.465462] ? loop_clr_fd+0xc20/0xc20 [ 1002.470603] lo_release+0x1b/0x190 [ 1002.475020] ? loop_clr_fd+0xc20/0xc20 [ 1002.479405] __blkdev_put+0x5aa/0x800 [ 1002.483269] ? revalidate_disk+0x1f0/0x1f0 [ 1002.487796] ? locks_remove_file+0x2cd/0x420 [ 1002.492859] ? blkdev_put+0x75/0x4c0 [ 1002.497008] ? blkdev_put+0x4c0/0x4c0 [ 1002.501381] blkdev_close+0x86/0xb0 [ 1002.505845] __fput+0x25f/0x7a0 [ 1002.509671] task_work_run+0x11f/0x190 [ 1002.514236] exit_to_usermode_loop+0x1ad/0x200 [ 1002.520142] do_syscall_64+0x4a3/0x640 [ 1002.525156] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1002.530703] RIP: 0033:0x402483 [ 1002.534272] RSP: 002b:00007fff00572718 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 1002.543143] RAX: 0000000000000000 RBX: 00007fff00572740 RCX: 0000000000402483 [ 1002.551373] RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000006 [ 1002.559606] RBP: 0000000000000006 R08: 0000000000000001 R09: 00007fff005725b0 [ 1002.567496] R10: 00007fff00572467 R11: 0000000000000246 R12: 0000000000000005 [ 1002.576408] R13: 0000000001a162c0 R14: 00007fff005727c0 R15: 0000000000000008 [ 1002.586198] INFO: task syz-executor289:15042 blocked for more than 140 seconds. [ 1002.596129] Not tainted 4.14.232-syzkaller #0 [ 1002.602173] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.612872] syz-executor289 D28416 15042 7991 0x00000004 [ 1002.619411] Call Trace: [ 1002.622298] __schedule+0x88b/0x1de0 [ 1002.626266] ? io_schedule_timeout+0x140/0x140 [ 1002.631513] ? lock_downgrade+0x740/0x740 [ 1002.636416] schedule+0x8d/0x1b0 [ 1002.640385] schedule_preempt_disabled+0xf/0x20 [ 1002.645754] __mutex_lock+0x669/0x1310 [ 1002.650306] ? loop_control_ioctl+0x67/0x3f0 [ 1002.655470] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1002.662362] ? lock_acquire+0x170/0x3f0 [ 1002.666840] loop_control_ioctl+0x67/0x3f0 [ 1002.671565] ? loop_lookup+0x190/0x190 [ 1002.676048] ? loop_lookup+0x190/0x190 [ 1002.680207] do_vfs_ioctl+0x75a/0xff0 [ 1002.684745] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 1002.691513] ? ioctl_preallocate+0x1a0/0x1a0 [ 1002.696604] ? kmem_cache_free+0x23a/0x2b0 [ 1002.701709] ? putname+0xcd/0x110 [ 1002.705537] ? do_sys_open+0x208/0x410 [ 1002.709614] ? filp_open+0x60/0x60 [ 1002.713419] ? security_file_ioctl+0x83/0xb0 [ 1002.718466] SyS_ioctl+0x7f/0xb0 [ 1002.722239] ? do_vfs_ioctl+0xff0/0xff0 [ 1002.726782] do_syscall_64+0x1d5/0x640 [ 1002.731447] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1002.737719] RIP: 0033:0x43ffe9 [ 1002.741477] RSP: 002b:00007fff00572978 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1002.750044] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 000000000043ffe9 [ 1002.758406] RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000004 [ 1002.767795] RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d [ 1002.776672] R10: 000000000000000d R11: 0000000000000246 R12: 00000000000c0d89 [ 1002.785194] R13: 00007fff005729a0 R14: 00007fff0057298c R15: 00007fff00572990 [ 1002.793922] INFO: task syz-executor289:15043 blocked for more than 140 seconds. [ 1002.802347] Not tainted 4.14.232-syzkaller #0 [ 1002.808060] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.819111] syz-executor289 D28912 15043 7989 0x00000004 [ 1002.826105] Call Trace: [ 1002.829258] __schedule+0x88b/0x1de0 [ 1002.834129] ? io_schedule_timeout+0x140/0x140 [ 1002.839151] ? lock_downgrade+0x740/0x740 [ 1002.844336] schedule+0x8d/0x1b0 [ 1002.848076] schedule_preempt_disabled+0xf/0x20 [ 1002.852861] __mutex_lock+0x669/0x1310 [ 1002.857831] ? loop_control_ioctl+0x67/0x3f0 [ 1002.863033] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1002.869251] ? lock_acquire+0x170/0x3f0 [ 1002.873391] loop_control_ioctl+0x67/0x3f0 [ 1002.877982] ? loop_lookup+0x190/0x190 [ 1002.882563] ? loop_lookup+0x190/0x190 [ 1002.887112] do_vfs_ioctl+0x75a/0xff0 [ 1002.891421] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 1002.897633] ? ioctl_preallocate+0x1a0/0x1a0 [ 1002.902974] ? kmem_cache_free+0x23a/0x2b0 [ 1002.908508] ? putname+0xcd/0x110 [ 1002.912752] ? do_sys_open+0x208/0x410 [ 1002.916651] ? filp_open+0x60/0x60 [ 1002.920569] ? security_file_ioctl+0x83/0xb0 [ 1002.925126] SyS_ioctl+0x7f/0xb0 [ 1002.929317] ? do_vfs_ioctl+0xff0/0xff0 [ 1002.933802] do_syscall_64+0x1d5/0x640 [ 1002.938328] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1002.944014] RIP: 0033:0x43ffe9 [ 1002.947375] RSP: 002b:00007fff00572978 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1002.955517] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 000000000043ffe9 [ 1002.963356] RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000004 [ 1002.972271] RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d [ 1002.979993] R10: 000000000000000d R11: 0000000000000246 R12: 00000000000c0d8b [ 1002.988079] R13: 00007fff005729a0 R14: 00007fff0057298c R15: 00007fff00572990 [ 1002.996501] INFO: task syz-executor289:15044 blocked for more than 140 seconds. [ 1003.005078] Not tainted 4.14.232-syzkaller #0 [ 1003.010597] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1003.019940] syz-executor289 D28912 15044 7988 0x00000004 [ 1003.026399] Call Trace: [ 1003.029277] __schedule+0x88b/0x1de0 [ 1003.033728] ? io_schedule_timeout+0x140/0x140 [ 1003.038652] ? lock_downgrade+0x740/0x740 [ 1003.042876] schedule+0x8d/0x1b0 [ 1003.046451] schedule_preempt_disabled+0xf/0x20 [ 1003.052022] __mutex_lock+0x669/0x1310 [ 1003.056231] ? loop_control_ioctl+0x181/0x3f0 [ 1003.061500] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1003.067969] ? loop_queue_work+0x1e80/0x1e80 [ 1003.073232] loop_control_ioctl+0x181/0x3f0 [ 1003.078239] ? loop_lookup+0x190/0x190 [ 1003.083196] ? loop_lookup+0x190/0x190 [ 1003.087684] do_vfs_ioctl+0x75a/0xff0 [ 1003.092083] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 1003.098023] ? ioctl_preallocate+0x1a0/0x1a0 [ 1003.103317] ? kmem_cache_free+0x23a/0x2b0 [ 1003.107561] ? putname+0xcd/0x110 [ 1003.111581] ? do_sys_open+0x208/0x410 [ 1003.115737] ? filp_open+0x60/0x60 [ 1003.119443] ? security_file_ioctl+0x83/0xb0 [ 1003.124816] SyS_ioctl+0x7f/0xb0 [ 1003.128885] ? do_vfs_ioctl+0xff0/0xff0 [ 1003.133598] do_syscall_64+0x1d5/0x640 [ 1003.137980] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1003.144143] RIP: 0033:0x43ffe9 [ 1003.147571] RSP: 002b:00007fff00572978 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1003.156375] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 000000000043ffe9 [ 1003.164181] RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000004 [ 1003.172516] RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d [ 1003.180346] R10: 000000000000000d R11: 0000000000000246 R12: 00000000000c0e2f [ 1003.188620] R13: 00007fff005729a0 R14: 00007fff0057298c R15: 00007fff00572990 [ 1003.196353] INFO: task syz-executor289:15046 blocked for more than 140 seconds. [ 1003.205066] Not tainted 4.14.232-syzkaller #0 [ 1003.210428] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1003.219254] syz-executor289 D28912 15046 7986 0x00000004 [ 1003.226131] Call Trace: [ 1003.229285] __schedule+0x88b/0x1de0 [ 1003.233683] ? io_schedule_timeout+0x140/0x140 [ 1003.238290] ? lock_downgrade+0x740/0x740 [ 1003.243038] schedule+0x8d/0x1b0 [ 1003.246704] schedule_preempt_disabled+0xf/0x20 [ 1003.251930] __mutex_lock+0x669/0x1310 [ 1003.256604] ? blkdev_reread_part+0x1b/0x40 [ 1003.261555] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1003.267753] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 1003.273208] ? __wake_up_common+0x5d0/0x5d0 [ 1003.278509] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 1003.284973] blkdev_reread_part+0x1b/0x40 [ 1003.289546] loop_set_status+0xeeb/0x12b0 [ 1003.294569] loop_set_status64+0x92/0xe0 [ 1003.299112] ? loop_set_status_old+0x200/0x200 [ 1003.304411] ? __mutex_lock+0x360/0x1310 [ 1003.309074] ? wait_for_completion_io+0x10/0x10 [ 1003.314248] ? set_blocksize+0x125/0x380 [ 1003.318785] lo_ioctl+0x587/0x1cd0 [ 1003.322639] ? loop_set_status64+0xe0/0xe0 [ 1003.327335] blkdev_ioctl+0x540/0x1830 [ 1003.331556] ? blkpg_ioctl+0x8d0/0x8d0 [ 1003.336209] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 1003.342653] ? debug_check_no_obj_freed+0x2c0/0x680 [ 1003.348596] block_ioctl+0xd9/0x120 [ 1003.352800] ? blkdev_fallocate+0x3a0/0x3a0 [ 1003.357640] do_vfs_ioctl+0x75a/0xff0 [ 1003.362257] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 1003.368564] ? ioctl_preallocate+0x1a0/0x1a0 [ 1003.374100] ? kmem_cache_free+0x23a/0x2b0 [ 1003.378353] ? putname+0xcd/0x110 [ 1003.382183] ? do_sys_open+0x208/0x410 [ 1003.386700] ? filp_open+0x60/0x60 [ 1003.390249] ? security_file_ioctl+0x83/0xb0 [ 1003.394748] SyS_ioctl+0x7f/0xb0 [ 1003.398642] ? do_vfs_ioctl+0xff0/0xff0 [ 1003.403115] do_syscall_64+0x1d5/0x640 [ 1003.407235] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1003.413014] RIP: 0033:0x43fe97 [ 1003.416642] RSP: 002b:00007fff00572718 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 [ 1003.425340] RAX: ffffffffffffffda RBX: 00007fff00572740 RCX: 000000000043fe97 [ 1003.434676] RDX: 00007fff00572850 RSI: 0000000000004c04 RDI: 0000000000000006 [ 1003.442451] RBP: 0000000000000006 R08: 00007fff005725b0 R09: 00000000fbad8001 [ 1003.450736] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000005 [ 1003.459112] R13: 0000000001a162c0 R14: 00007fff00572850 R15: 00007fff00572990 [ 1003.467738] [ 1003.467738] Showing all locks held in the system: [ 1003.475061] 1 lock held by khungtaskd/1532: [ 1003.480669] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 1003.492261] 2 locks held by systemd-udevd/4629: [ 1003.497406] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 [ 1003.506287] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 [ 1003.515563] 1 lock held by in:imklog/7711: [ 1003.520764] #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0x1fb/0x2b0 [ 1003.530196] 2 locks held by systemd-udevd/8147: [ 1003.535745] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 [ 1003.545561] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 [ 1003.554598] 2 locks held by systemd-udevd/8430: [ 1003.559599] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 [ 1003.569671] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 [ 1003.580414] 2 locks held by syz-executor289/15025: [ 1003.586760] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_put+0xd8/0x800 [ 1003.596153] #1: (loop_index_mutex){+.+.}, at: [] lo_release+0x1b/0x190 [ 1003.605379] 2 locks held by syz-executor289/15027: [ 1003.611198] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_put+0xd8/0x800 [ 1003.620197] #1: (loop_index_mutex){+.+.}, at: [] lo_release+0x1b/0x190 [ 1003.630366] 1 lock held by syz-executor289/15042: [ 1003.636176] #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x67/0x3f0 [ 1003.647214] 1 lock held by syz-executor289/15043: [ 1003.652401] #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x67/0x3f0 [ 1003.663216] 2 locks held by syz-executor289/15044: [ 1003.669059] #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x67/0x3f0 [ 1003.679395] #1: (&lo->lo_ctl_mutex){+.+.}, at: [] loop_control_ioctl+0x181/0x3f0 [ 1003.689684] 2 locks held by syz-executor289/15046: [ 1003.696733] #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1cd0 [ 1003.708997] #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1b/0x40 [ 1003.719161] [ 1003.721015] ============================================= [ 1003.721015] [ 1003.729103] NMI backtrace for cpu 0 [ 1003.733268] CPU: 0 PID: 1532 Comm: khungtaskd Not tainted 4.14.232-syzkaller #0 [ 1003.742829] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1003.753760] Call Trace: [ 1003.756637] dump_stack+0x1b2/0x281 [ 1003.761198] nmi_cpu_backtrace.cold+0x57/0x93 [ 1003.766674] ? irq_force_complete_move+0x350/0x350 [ 1003.772827] nmi_trigger_cpumask_backtrace+0x13a/0x180 [ 1003.779679] watchdog+0x5b9/0xb40 [ 1003.783720] ? hungtask_pm_notify+0x50/0x50 [ 1003.788144] kthread+0x30d/0x420 [ 1003.791687] ? kthread_create_on_node+0xd0/0xd0 [ 1003.796981] ret_from_fork+0x24/0x30 [ 1003.800801] Sending NMI from CPU 0 to CPUs 1: [ 1003.806613] NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff8722b3ee [ 1003.807563] Kernel panic - not syncing: hung_task: blocked tasks [ 1003.824952] CPU: 0 PID: 1532 Comm: khungtaskd Not tainted 4.14.232-syzkaller #0 [ 1003.833535] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1003.844432] Call Trace: [ 1003.847105] dump_stack+0x1b2/0x281 [ 1003.850949] panic+0x1f9/0x42d [ 1003.854724] ? add_taint.cold+0x16/0x16 [ 1003.860258] ? printk_safe_flush+0xa9/0x110 [ 1003.865632] watchdog+0x5ca/0xb40 [ 1003.869555] ? hungtask_pm_notify+0x50/0x50 [ 1003.874323] kthread+0x30d/0x420 [ 1003.879288] ? kthread_create_on_node+0xd0/0xd0 [ 1003.885341] ret_from_fork+0x24/0x30 [ 1003.892483] Kernel Offset: disabled [ 1003.896926] Rebooting in 86400 seconds..