Warning: Permanently added '10.128.0.208' (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 syzkaller login: [ 857.980000] INFO: task systemd-udevd:4633 blocked for more than 140 seconds. [ 857.987272] Not tainted 4.14.290-syzkaller #0 [ 857.993285] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.001309] systemd-udevd D25760 4633 1 0x00000304 [ 858.006921] Call Trace: [ 858.009497] __schedule+0x88b/0x1de0 [ 858.013239] ? io_schedule_timeout+0x140/0x140 [ 858.017820] ? lock_downgrade+0x740/0x740 [ 858.022001] schedule+0x8d/0x1b0 [ 858.025368] schedule_preempt_disabled+0xf/0x20 [ 858.030060] __mutex_lock+0x669/0x1310 [ 858.033934] ? kernel_text_address+0xbd/0xf0 [ 858.038320] ? __blkdev_get+0x191/0x1090 [ 858.042443] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 858.047880] ? exact_match+0x9/0x20 [ 858.051676] ? disk_block_events+0x1d/0x120 [ 858.055991] __blkdev_get+0x191/0x1090 [ 858.059915] ? lookup_fast+0x430/0xe30 [ 858.063791] ? sb_min_blocksize+0x1d0/0x1d0 [ 858.068087] ? fsnotify+0x974/0x11b0 [ 858.071827] blkdev_get+0x88/0x890 [ 858.075383] ? __blkdev_get+0x1090/0x1090 [ 858.079511] ? lock_downgrade+0x740/0x740 [ 858.083694] ? do_raw_spin_unlock+0x164/0x220 [ 858.088200] ? _raw_spin_unlock+0x29/0x40 [ 858.092385] blkdev_open+0x1cc/0x250 [ 858.096084] ? security_file_open+0x82/0x190 [ 858.100526] do_dentry_open+0x44b/0xec0 [ 858.104485] ? blkdev_get_by_dev+0x70/0x70 [ 858.108698] vfs_open+0x105/0x220 [ 858.112180] path_openat+0x628/0x2970 [ 858.115979] ? path_lookupat+0x780/0x780 [ 858.120092] ? trace_hardirqs_on+0x10/0x10 [ 858.124321] ? copyout+0xc0/0xc0 [ 858.127684] do_filp_open+0x179/0x3c0 [ 858.131508] ? may_open_dev+0xe0/0xe0 [ 858.135300] ? lock_downgrade+0x740/0x740 [ 858.139445] ? do_raw_spin_unlock+0x164/0x220 [ 858.143982] ? _raw_spin_unlock+0x29/0x40 [ 858.148116] ? __alloc_fd+0x1be/0x490 [ 858.151945] do_sys_open+0x296/0x410 [ 858.155649] ? filp_open+0x60/0x60 [ 858.159234] ? do_syscall_64+0x4c/0x640 [ 858.163434] ? do_sys_open+0x410/0x410 [ 858.167319] do_syscall_64+0x1d5/0x640 [ 858.171242] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 858.176422] RIP: 0033:0x7f40f2875840 [ 858.180179] RSP: 002b:00007ffeff1d9ab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 858.188055] RAX: ffffffffffffffda RBX: 00007ffeff1d9b50 RCX: 00007f40f2875840 [ 858.195369] RDX: 000055605b6eefe3 RSI: 00000000000a0800 RDI: 000055605d081e70 [ 858.202684] RBP: 00007ffeff1da000 R08: 000055605b6ee670 R09: 0000000000000010 [ 858.209975] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffeff1d9c60 [ 858.217232] R13: 000055605cef8010 R14: 000055605d0a8450 R15: 00007ffeff1d9b30 [ 858.224564] INFO: task systemd-udevd:8000 blocked for more than 140 seconds. [ 858.231801] Not tainted 4.14.290-syzkaller #0 [ 858.236802] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.244811] systemd-udevd D28456 8000 4633 0x00000300 [ 858.250481] Call Trace: [ 858.253060] __schedule+0x88b/0x1de0 [ 858.256768] ? __lock_acquire+0x5fc/0x3f20 [ 858.261169] ? io_schedule_timeout+0x140/0x140 [ 858.265836] ? lock_downgrade+0x740/0x740 [ 858.270014] schedule+0x8d/0x1b0 [ 858.273478] schedule_preempt_disabled+0xf/0x20 [ 858.278135] __mutex_lock+0x669/0x1310 [ 858.282076] ? __blkdev_get+0x191/0x1090 [ 858.286150] ? __mutex_lock+0x350/0x1310 [ 858.290246] ? lo_open+0x19/0xb0 [ 858.293606] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 858.299480] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 858.304966] ? disk_get_part+0x95/0x140 [ 858.308954] ? loop_unregister_transfer+0x90/0x90 [ 858.313887] lo_open+0x19/0xb0 [ 858.317074] __blkdev_get+0x306/0x1090 [ 858.321009] ? lookup_fast+0x430/0xe30 [ 858.324894] ? sb_min_blocksize+0x1d0/0x1d0 [ 858.329198] ? fsnotify+0x974/0x11b0 [ 858.332960] blkdev_get+0x88/0x890 [ 858.336491] ? __blkdev_get+0x1090/0x1090 [ 858.340670] ? lock_downgrade+0x740/0x740 [ 858.344807] ? do_raw_spin_unlock+0x164/0x220 [ 858.349280] ? _raw_spin_unlock+0x29/0x40 [ 858.353454] blkdev_open+0x1cc/0x250 [ 858.357160] ? security_file_open+0x82/0x190 [ 858.361624] do_dentry_open+0x44b/0xec0 [ 858.365588] ? blkdev_get_by_dev+0x70/0x70 [ 858.369853] vfs_open+0x105/0x220 [ 858.373317] path_openat+0x628/0x2970 [ 858.377098] ? path_lookupat+0x780/0x780 [ 858.381189] ? trace_hardirqs_on+0x10/0x10 [ 858.385410] ? copyout+0xc0/0xc0 [ 858.388756] do_filp_open+0x179/0x3c0 [ 858.392618] ? may_open_dev+0xe0/0xe0 [ 858.396409] ? lock_downgrade+0x740/0x740 [ 858.400585] ? do_raw_spin_unlock+0x164/0x220 [ 858.405087] ? _raw_spin_unlock+0x29/0x40 [ 858.409214] ? __alloc_fd+0x1be/0x490 [ 858.413055] do_sys_open+0x296/0x410 [ 858.416776] ? filp_open+0x60/0x60 [ 858.420358] ? do_syscall_64+0x4c/0x640 [ 858.424319] ? do_sys_open+0x410/0x410 [ 858.428188] do_syscall_64+0x1d5/0x640 [ 858.432105] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 858.437291] RIP: 0033:0x7f40f2875840 [ 858.441075] RSP: 002b:00007ffeff1d93f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 858.448776] RAX: ffffffffffffffda RBX: 000055605cefb120 RCX: 00007f40f2875840 [ 858.456101] RDX: 000055605b6eefe3 RSI: 00000000000a0800 RDI: 000055605cf0df40 [ 858.463415] RBP: 00007ffeff1d9570 R08: 000055605b6ee670 R09: 0000000000000010 [ 858.470844] R10: 000055605b6eed0c R11: 0000000000000246 R12: 00007ffeff1d94c0 [ 858.478100] R13: 000055605cefb4c0 R14: 0000000000000003 R15: 000000000000000e [ 858.485427] INFO: task systemd-udevd:8002 blocked for more than 140 seconds. [ 858.492664] Not tainted 4.14.290-syzkaller #0 [ 858.497660] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.505667] systemd-udevd D28712 8002 4633 0x00000300 [ 858.511347] Call Trace: [ 858.513923] __schedule+0x88b/0x1de0 [ 858.517634] ? __lock_acquire+0x5fc/0x3f20 [ 858.521905] ? io_schedule_timeout+0x140/0x140 [ 858.526480] ? lock_downgrade+0x740/0x740 [ 858.530678] schedule+0x8d/0x1b0 [ 858.534030] schedule_preempt_disabled+0xf/0x20 [ 858.538671] __mutex_lock+0x669/0x1310 [ 858.542603] ? __blkdev_get+0x191/0x1090 [ 858.546652] ? __mutex_lock+0x350/0x1310 [ 858.550734] ? lo_open+0x19/0xb0 [ 858.554090] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 858.559533] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 858.565041] ? disk_get_part+0x95/0x140 [ 858.569012] ? loop_unregister_transfer+0x90/0x90 [ 858.573955] lo_open+0x19/0xb0 [ 858.577146] __blkdev_get+0x306/0x1090 [ 858.581073] ? lookup_fast+0x430/0xe30 [ 858.584981] ? sb_min_blocksize+0x1d0/0x1d0 [ 858.589380] ? fsnotify+0x974/0x11b0 [ 858.593140] blkdev_get+0x88/0x890 [ 858.596676] ? __blkdev_get+0x1090/0x1090 [ 858.600888] ? lock_downgrade+0x740/0x740 [ 858.605027] ? do_raw_spin_unlock+0x164/0x220 [ 858.609502] ? _raw_spin_unlock+0x29/0x40 [ 858.613696] blkdev_open+0x1cc/0x250 [ 858.617400] ? security_file_open+0x82/0x190 [ 858.621862] do_dentry_open+0x44b/0xec0 [ 858.625831] ? blkdev_get_by_dev+0x70/0x70 [ 858.630093] vfs_open+0x105/0x220 [ 858.633552] path_openat+0x628/0x2970 [ 858.637338] ? path_lookupat+0x780/0x780 [ 858.641433] ? trace_hardirqs_on+0x10/0x10 [ 858.645660] ? copyout+0xc0/0xc0 [ 858.649009] do_filp_open+0x179/0x3c0 [ 858.652851] ? may_open_dev+0xe0/0xe0 [ 858.656661] ? lock_downgrade+0x740/0x740 [ 858.660924] ? do_raw_spin_unlock+0x164/0x220 [ 858.665479] ? _raw_spin_unlock+0x29/0x40 [ 858.669609] ? __alloc_fd+0x1be/0x490 [ 858.673450] do_sys_open+0x296/0x410 [ 858.677183] ? filp_open+0x60/0x60 [ 858.680957] ? do_syscall_64+0x4c/0x640 [ 858.684927] ? do_sys_open+0x410/0x410 [ 858.688796] do_syscall_64+0x1d5/0x640 [ 858.692733] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 858.697928] RIP: 0033:0x7f40f2875840 [ 858.701683] RSP: 002b:00007ffeff1d99e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 858.709435] RAX: ffffffffffffffda RBX: 000055605cf0dc80 RCX: 00007f40f2875840 [ 858.716756] RDX: 000055605b6eefe3 RSI: 00000000000a0800 RDI: 000055605cf0de10 [ 858.724071] RBP: 00007ffeff1d9b60 R08: 000055605b6ee670 R09: 0000000000000010 [ 858.731370] R10: 000055605b6eed0c R11: 0000000000000246 R12: 00007ffeff1d9ab0 [ 858.738647] R13: 000055605cf0a880 R14: 0000000000000003 R15: 000000000000000e [ 858.746007] INFO: task systemd-udevd:8028 blocked for more than 140 seconds. [ 858.753241] Not tainted 4.14.290-syzkaller #0 [ 858.758241] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.766378] systemd-udevd D28416 8028 4633 0x00000300 [ 858.772066] Call Trace: [ 858.774656] __schedule+0x88b/0x1de0 [ 858.778390] ? io_schedule_timeout+0x140/0x140 [ 858.783024] ? lock_downgrade+0x740/0x740 [ 858.787176] schedule+0x8d/0x1b0 [ 858.790583] schedule_preempt_disabled+0xf/0x20 [ 858.795249] __mutex_lock+0x669/0x1310 [ 858.799116] ? __blkdev_get+0x191/0x1090 [ 858.803209] ? __mutex_lock+0x350/0x1310 [ 858.807266] ? lo_open+0x19/0xb0 [ 858.810661] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 858.816104] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 858.821695] ? exact_match+0x9/0x20 [ 858.825325] ? kobj_lookup+0x31e/0x400 [ 858.829194] lo_open+0x19/0xb0 [ 858.832418] ? loop_unregister_transfer+0x90/0x90 [ 858.837254] __blkdev_get+0xa8c/0x1090 [ 858.841198] ? lookup_fast+0x430/0xe30 [ 858.845075] ? sb_min_blocksize+0x1d0/0x1d0 [ 858.849376] ? fsnotify+0x974/0x11b0 [ 858.853113] blkdev_get+0x88/0x890 [ 858.856646] ? __blkdev_get+0x1090/0x1090 [ 858.860846] ? lock_downgrade+0x740/0x740 [ 858.864991] ? do_raw_spin_unlock+0x164/0x220 [ 858.869478] ? _raw_spin_unlock+0x29/0x40 [ 858.873653] blkdev_open+0x1cc/0x250 [ 858.877356] ? security_file_open+0x82/0x190 [ 858.881799] do_dentry_open+0x44b/0xec0 [ 858.885767] ? blkdev_get_by_dev+0x70/0x70 [ 858.890170] vfs_open+0x105/0x220 [ 858.893614] path_openat+0x628/0x2970 [ 858.897394] ? path_lookupat+0x780/0x780 [ 858.901502] ? trace_hardirqs_on+0x10/0x10 [ 858.905724] ? copyout+0xc0/0xc0 [ 858.909070] do_filp_open+0x179/0x3c0 [ 858.912898] ? may_open_dev+0xe0/0xe0 [ 858.916690] ? lock_downgrade+0x740/0x740 [ 858.920891] ? do_raw_spin_unlock+0x164/0x220 [ 858.925373] ? _raw_spin_unlock+0x29/0x40 [ 858.929501] ? __alloc_fd+0x1be/0x490 [ 858.933343] do_sys_open+0x296/0x410 [ 858.937048] ? filp_open+0x60/0x60 [ 858.940964] ? do_syscall_64+0x4c/0x640 [ 858.944934] ? do_sys_open+0x410/0x410 [ 858.948799] do_syscall_64+0x1d5/0x640 [ 858.952720] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 858.957907] RIP: 0033:0x7f40f2875840 [ 858.961656] RSP: 002b:00007ffeff1d93f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 858.969351] RAX: ffffffffffffffda RBX: 000055605cf0c160 RCX: 00007f40f2875840 [ 858.976648] RDX: 000055605b6eefe3 RSI: 00000000000a0800 RDI: 000055605cef99b0 [ 858.983962] RBP: 00007ffeff1d9570 R08: 000055605b6ee670 R09: 0000000000000010 [ 858.991346] R10: 000055605b6eed0c R11: 0000000000000246 R12: 00007ffeff1d94c0 [ 858.998605] R13: 000055605cf0cab0 R14: 0000000000000003 R15: 000000000000000e [ 859.005930] INFO: task systemd-udevd:8052 blocked for more than 140 seconds. [ 859.013148] Not tainted 4.14.290-syzkaller #0 [ 859.018164] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 859.026186] systemd-udevd D28616 8052 4633 0x00000300 [ 859.031856] Call Trace: [ 859.034433] __schedule+0x88b/0x1de0 [ 859.038127] ? io_schedule_timeout+0x140/0x140 [ 859.042750] ? lock_downgrade+0x740/0x740 [ 859.046907] schedule+0x8d/0x1b0 [ 859.050298] schedule_preempt_disabled+0xf/0x20 [ 859.054954] __mutex_lock+0x669/0x1310 [ 859.058819] ? __blkdev_get+0x191/0x1090 [ 859.062906] ? __mutex_lock+0x350/0x1310 [ 859.066956] ? lo_open+0x19/0xb0 [ 859.070349] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 859.075790] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 859.081284] ? exact_match+0x9/0x20 [ 859.084914] ? kobj_lookup+0x31e/0x400 [ 859.093608] lo_open+0x19/0xb0 [ 859.096787] ? loop_unregister_transfer+0x90/0x90 [ 859.101802] __blkdev_get+0xa8c/0x1090 [ 859.105678] ? lookup_fast+0x430/0xe30 [ 859.109543] ? sb_min_blocksize+0x1d0/0x1d0 [ 859.113892] ? fsnotify+0x974/0x11b0 [ 859.117602] blkdev_get+0x88/0x890 [ 859.121174] ? __blkdev_get+0x1090/0x1090 [ 859.125326] ? lock_downgrade+0x740/0x740 [ 859.129451] ? do_raw_spin_unlock+0x164/0x220 [ 859.133968] ? _raw_spin_unlock+0x29/0x40 [ 859.138105] blkdev_open+0x1cc/0x250 [ 859.141853] ? security_file_open+0x82/0x190 [ 859.146255] do_dentry_open+0x44b/0xec0 [ 859.150263] ? blkdev_get_by_dev+0x70/0x70 [ 859.154509] vfs_open+0x105/0x220 [ 859.157958] path_openat+0x628/0x2970 [ 859.161802] ? path_lookupat+0x780/0x780 [ 859.165863] ? trace_hardirqs_on+0x10/0x10 [ 859.170125] ? copyout+0xc0/0xc0 [ 859.173486] do_filp_open+0x179/0x3c0 [ 859.177267] ? may_open_dev+0xe0/0xe0 [ 859.181117] ? lock_downgrade+0x740/0x740 [ 859.185252] ? do_raw_spin_unlock+0x164/0x220 [ 859.189800] ? _raw_spin_unlock+0x29/0x40 [ 859.193933] ? __alloc_fd+0x1be/0x490 [ 859.197729] do_sys_open+0x296/0x410 [ 859.201471] ? filp_open+0x60/0x60 [ 859.205029] ? do_syscall_64+0x4c/0x640 [ 859.208981] ? do_sys_open+0x410/0x410 [ 859.212908] do_syscall_64+0x1d5/0x640 [ 859.216789] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 859.222026] RIP: 0033:0x7f40f2875840 [ 859.225729] RSP: 002b:00007ffeff1d93f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 859.233474] RAX: ffffffffffffffda RBX: 000055605cf0c160 RCX: 00007f40f2875840 [ 859.240796] RDX: 000055605b6eefe3 RSI: 00000000000a0800 RDI: 000055605cef8e00 [ 859.248050] RBP: 00007ffeff1d9570 R08: 000055605b6ee670 R09: 0000000000000010 [ 859.255345] R10: 000055605b6eed0c R11: 0000000000000246 R12: 00007ffeff1d94c0 [ 859.262664] R13: 000055605cf076e0 R14: 0000000000000003 R15: 000000000000000e [ 859.269978] INFO: task systemd-udevd:8053 blocked for more than 140 seconds. [ 859.277148] Not tainted 4.14.290-syzkaller #0 [ 859.282213] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 859.290215] systemd-udevd D28400 8053 4633 0x00000300 [ 859.295840] Call Trace: [ 859.298411] __schedule+0x88b/0x1de0 [ 859.302166] ? io_schedule_timeout+0x140/0x140 [ 859.306776] ? lock_downgrade+0x740/0x740 [ 859.311105] schedule+0x8d/0x1b0 [ 859.314461] schedule_preempt_disabled+0xf/0x20 [ 859.319119] __mutex_lock+0x669/0x1310 [ 859.323073] ? lo_release+0x1b/0x190 [ 859.326789] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 859.332287] ? blkdev_put+0x27/0x4c0 [ 859.335991] ? blkdev_put+0x75/0x4c0 [ 859.339694] ? lock_downgrade+0x740/0x740 [ 859.343889] ? loop_clr_fd+0xc20/0xc20 [ 859.347772] ? blkdev_put+0x4c0/0x4c0 [ 859.351606] lo_release+0x1b/0x190 [ 859.355262] ? loop_clr_fd+0xc20/0xc20 [ 859.359152] __blkdev_put+0x5aa/0x800 [ 859.363005] ? revalidate_disk+0x1f0/0x1f0 [ 859.367230] ? locks_remove_file+0x2cd/0x420 [ 859.371665] ? blkdev_put+0x75/0x4c0 [ 859.375374] ? blkdev_put+0x4c0/0x4c0 [ 859.379152] blkdev_close+0x86/0xb0 [ 859.382822] __fput+0x25f/0x7a0 [ 859.386096] task_work_run+0x11f/0x190 [ 859.390008] exit_to_usermode_loop+0x1ad/0x200 [ 859.394604] do_syscall_64+0x4a3/0x640 [ 859.398483] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 859.403819] RIP: 0033:0x7f40f2875270 [ 859.407536] RSP: 002b:00007ffeff1d4b98 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 859.415460] RAX: 0000000000000000 RBX: 000000000000000f RCX: 00007f40f2875270 [ 859.422799] RDX: 00007f40f285fb58 RSI: 0000000000000000 RDI: 000000000000000f [ 859.430107] RBP: 00007f40f372f710 R08: f29b65068fae577f R09: 0000000000000009 [ 859.437459] R10: 347260abbefa549c R11: 0000000000000246 R12: 0000000000000002 [ 859.444784] R13: 0000000000000000 R14: 000055605cf076e0 R15: 000000000000000f [ 859.452112] INFO: task systemd-udevd:8065 blocked for more than 140 seconds. [ 859.459287] Not tainted 4.14.290-syzkaller #0 [ 859.464354] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 859.472373] systemd-udevd D27936 8065 4633 0x00000300 [ 859.478001] Call Trace: [ 859.480665] __schedule+0x88b/0x1de0 [ 859.484371] ? __lock_acquire+0x5fc/0x3f20 [ 859.488589] ? io_schedule_timeout+0x140/0x140 [ 859.493226] ? lock_downgrade+0x740/0x740 [ 859.497369] schedule+0x8d/0x1b0 [ 859.500779] schedule_preempt_disabled+0xf/0x20 [ 859.505573] __mutex_lock+0x669/0x1310 [ 859.509442] ? __blkdev_get+0x191/0x1090 [ 859.513559] ? __mutex_lock+0x350/0x1310 [ 859.517623] ? lo_open+0x19/0xb0 [ 859.521173] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 859.526619] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 859.532103] ? disk_get_part+0x95/0x140 [ 859.536084] ? loop_unregister_transfer+0x90/0x90 [ 859.540974] lo_open+0x19/0xb0 [ 859.544160] __blkdev_get+0x306/0x1090 [ 859.548038] ? lookup_fast+0x430/0xe30 [ 859.551946] ? sb_min_blocksize+0x1d0/0x1d0 [ 859.556264] ? fsnotify+0x974/0x11b0 [ 859.560025] blkdev_get+0x88/0x890 [ 859.563572] ? __blkdev_get+0x1090/0x1090 [ 859.567698] ? lock_downgrade+0x740/0x740 [ 859.571910] ? do_raw_spin_unlock+0x164/0x220 [ 859.576411] ? _raw_spin_unlock+0x29/0x40 [ 859.580592] blkdev_open+0x1cc/0x250 [ 859.584293] ? security_file_open+0x82/0x190 [ 859.588699] do_dentry_open+0x44b/0xec0 [ 859.592800] ? blkdev_get_by_dev+0x70/0x70 [ 859.597024] vfs_open+0x105/0x220 [ 859.600525] path_openat+0x628/0x2970 [ 859.604317] ? path_lookupat+0x780/0x780 [ 859.608358] ? trace_hardirqs_on+0x10/0x10 [ 859.612624] ? copyout+0xc0/0xc0 [ 859.615984] do_filp_open+0x179/0x3c0 [ 859.619828] ? may_open_dev+0xe0/0xe0 [ 859.623623] ? lock_downgrade+0x740/0x740 [ 859.627768] ? do_raw_spin_unlock+0x164/0x220 [ 859.632284] ? _raw_spin_unlock+0x29/0x40 [ 859.636419] ? __alloc_fd+0x1be/0x490 [ 859.640258] do_sys_open+0x296/0x410 [ 859.643959] ? filp_open+0x60/0x60 [ 859.647478] ? do_syscall_64+0x4c/0x640 [ 859.651471] ? do_sys_open+0x410/0x410 [ 859.655368] do_syscall_64+0x1d5/0x640 [ 859.659251] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 859.664487] RIP: 0033:0x7f40f2875840 [ 859.668186] RSP: 002b:00007ffeff1d93f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 859.675920] RAX: ffffffffffffffda RBX: 000055605cf076e0 RCX: 00007f40f2875840 [ 859.683244] RDX: 000055605b6eefe3 RSI: 00000000000a0800 RDI: 000055605cef99b0 [ 859.690543] RBP: 00007ffeff1d9570 R08: 000055605b6ee670 R09: 0000000000000010 [ 859.697800] R10: 000055605b6eed0c R11: 0000000000000246 R12: 00007ffeff1d94c0 [ 859.705104] R13: 000055605cf0a880 R14: 0000000000000003 R15: 000000000000000e [ 859.712435] INFO: task syz-executor282:11533 blocked for more than 140 seconds. [ 859.719918] Not tainted 4.14.290-syzkaller #0 [ 859.724916] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 859.733035] syz-executor282 D28912 11533 7993 0x00000004 [ 859.738655] Call Trace: [ 859.741294] __schedule+0x88b/0x1de0 [ 859.745012] ? io_schedule_timeout+0x140/0x140 [ 859.749569] ? lock_downgrade+0x740/0x740 [ 859.753740] schedule+0x8d/0x1b0 [ 859.757106] schedule_preempt_disabled+0xf/0x20 [ 859.761826] __mutex_lock+0x669/0x1310 [ 859.765840] ? blkdev_reread_part+0x1b/0x40 [ 859.770185] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 859.775709] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 859.780846] ? __wake_up_common+0x5d0/0x5d0 [ 859.785154] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 859.790441] blkdev_reread_part+0x1b/0x40 [ 859.794663] loop_clr_fd+0x9ca/0xc20 [ 859.798352] lo_ioctl+0x895/0x1cd0 [ 859.801924] ? __check_object_size+0x179/0x230 [ 859.806491] ? loop_set_status64+0xe0/0xe0 [ 859.810756] blkdev_ioctl+0x540/0x1830 [ 859.814632] ? blkpg_ioctl+0x8d0/0x8d0 [ 859.818499] ? getname_flags+0x22e/0x550 [ 859.822626] block_ioctl+0xd9/0x120 [ 859.826248] ? blkdev_fallocate+0x3a0/0x3a0 [ 859.830596] do_vfs_ioctl+0x75a/0xff0 [ 859.834395] ? ioctl_preallocate+0x1a0/0x1a0 [ 859.838787] ? SyS_fstat+0xd0/0xd0 [ 859.842368] ? kmem_cache_free+0x23a/0x2b0 [ 859.846606] ? putname+0xcd/0x110 [ 859.850083] ? do_sys_open+0x208/0x410 [ 859.853963] ? filp_open+0x60/0x60 [ 859.857486] ? security_file_ioctl+0x83/0xb0 [ 859.861935] SyS_ioctl+0x7f/0xb0 [ 859.865291] ? do_vfs_ioctl+0xff0/0xff0 [ 859.869249] do_syscall_64+0x1d5/0x640 [ 859.873188] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 859.878369] RIP: 0033:0x7f49efe45027 [ 859.882129] RSP: 002b:00007ffc55f32a08 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 859.889905] RAX: ffffffffffffffda RBX: 00007ffc55f32a30 RCX: 00007f49efe45027 [ 859.897175] RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000005 [ 859.904487] RBP: 0000000000000005 R08: 0000000000000001 R09: 00007ffc55f328a0 [ 859.911891] R10: 00007ffc55f32757 R11: 0000000000000246 R12: 0000000000000004 [ 859.919164] R13: 0000555556f212c0 R14: 00007ffc55f32ab0 R15: 0000000000000008 [ 859.926491] INFO: task syz-executor282:11535 blocked for more than 140 seconds. [ 859.933974] Not tainted 4.14.290-syzkaller #0 [ 859.938973] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 859.947101] syz-executor282 D28720 11535 7995 0x00000004 [ 859.952790] Call Trace: [ 859.955370] __schedule+0x88b/0x1de0 [ 859.959063] ? io_schedule_timeout+0x140/0x140 [ 859.963778] ? lock_downgrade+0x740/0x740 [ 859.967921] schedule+0x8d/0x1b0 [ 859.971311] schedule_preempt_disabled+0xf/0x20 [ 859.975974] __mutex_lock+0x669/0x1310 [ 859.979947] ? blkdev_reread_part+0x1b/0x40 [ 859.984262] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 859.989764] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 859.994909] ? __wake_up_common+0x5d0/0x5d0 [ 859.999223] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 860.004372] blkdev_reread_part+0x1b/0x40 [ 860.008511] loop_clr_fd+0x9ca/0xc20 [ 860.012252] lo_ioctl+0x895/0x1cd0 [ 860.015786] ? __check_object_size+0x179/0x230 [ 860.020393] ? loop_set_status64+0xe0/0xe0 [ 860.024620] blkdev_ioctl+0x540/0x1830 [ 860.028510] ? blkpg_ioctl+0x8d0/0x8d0 [ 860.032438] ? getname_flags+0x22e/0x550 [ 860.036510] block_ioctl+0xd9/0x120 [ 860.040249] ? blkdev_fallocate+0x3a0/0x3a0 [ 860.044557] do_vfs_ioctl+0x75a/0xff0 [ 860.048340] ? ioctl_preallocate+0x1a0/0x1a0 [ 860.052771] ? SyS_fstat+0xd0/0xd0 [ 860.056299] ? kmem_cache_free+0x23a/0x2b0 [ 860.060651] ? putname+0xcd/0x110 [ 860.064093] ? do_sys_open+0x208/0x410 [ 860.067958] ? filp_open+0x60/0x60 [ 860.071520] ? security_file_ioctl+0x83/0xb0 [ 860.075919] SyS_ioctl+0x7f/0xb0 [ 860.079262] ? do_vfs_ioctl+0xff0/0xff0 [ 860.083268] do_syscall_64+0x1d5/0x640 [ 860.087164] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 860.092375] RIP: 0033:0x7f49efe45027 [ 860.096092] RSP: 002b:00007ffc55f32a08 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 860.103825] RAX: ffffffffffffffda RBX: 00007ffc55f32a30 RCX: 00007f49efe45027 [ 860.111137] RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000005 [ 860.118409] RBP: 0000000000000005 R08: 0000000000000001 R09: 00007ffc55f328a0 [ 860.125741] R10: 00007ffc55f32757 R11: 0000000000000246 R12: 0000000000000004 [ 860.133068] R13: 0000555556f212c0 R14: 00007ffc55f32ab0 R15: 0000000000000008 [ 860.140394] INFO: task syz-executor282:11556 blocked for more than 140 seconds. [ 860.147832] Not tainted 4.14.290-syzkaller #0 [ 860.153016] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 860.161035] syz-executor282 D28912 11556 7998 0x00000004 [ 860.166765] Call Trace: [ 860.169333] __schedule+0x88b/0x1de0 [ 860.173092] ? io_schedule_timeout+0x140/0x140 [ 860.177674] ? lock_downgrade+0x740/0x740 [ 860.181854] schedule+0x8d/0x1b0 [ 860.185351] schedule_preempt_disabled+0xf/0x20 [ 860.190045] __mutex_lock+0x669/0x1310 [ 860.193924] ? loop_control_ioctl+0x181/0x3f0 [ 860.198428] ? tlb_flush_mmu_free+0x1a0/0x1a0 [ 860.202952] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 860.208396] ? loop_queue_work+0x21e0/0x21e0 [ 860.212831] loop_control_ioctl+0x181/0x3f0 [ 860.217142] ? loop_lookup+0x190/0x190 [ 860.221060] ? vm_insert_page+0x7c0/0x7c0 [ 860.225368] ? loop_lookup+0x190/0x190 [ 860.229285] do_vfs_ioctl+0x75a/0xff0 [ 860.233110] ? ioctl_preallocate+0x1a0/0x1a0 [ 860.237513] ? lock_downgrade+0x740/0x740 [ 860.241701] ? security_file_ioctl+0x83/0xb0 [ 860.246095] SyS_ioctl+0x7f/0xb0 [ 860.249434] ? do_vfs_ioctl+0xff0/0xff0 [ 860.253450] do_syscall_64+0x1d5/0x640 [ 860.257350] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 860.262574] RIP: 0033:0x7f49efe45179 [ 860.266266] RSP: 002b:00007ffc55f32c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 860.274092] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f49efe45179 [ 860.281395] RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000003 [ 860.288765] RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d [ 860.296088] R10: 00007ffc55f326e0 R11: 0000000000000246 R12: 0000000000099b07 [ 860.303401] R13: 00007ffc55f32c90 R14: 00007ffc55f32c7c R15: 00007ffc55f32c80 [ 860.310747] [ 860.310747] Showing all locks held in the system: [ 860.317068] 1 lock held by khungtaskd/1533: [ 860.321495] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 860.330601] 1 lock held by systemd-udevd/4633: [ 860.335165] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 [ 860.343907] 2 locks held by systemd-udevd/8000: [ 860.348559] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 [ 860.357847] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 [ 860.366002] 2 locks held by systemd-udevd/8002: [ 860.370713] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 [ 860.379574] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 [ 860.387691] 2 locks held by systemd-udevd/8028: [ 860.392424] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 [ 860.401244] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 [ 860.409327] 2 locks held by systemd-udevd/8052: [ 860.414039] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 [ 860.422854] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 [ 860.430969] 2 locks held by systemd-udevd/8053: [ 860.435748] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_put+0xd8/0x800 [ 860.444288] #1: (loop_index_mutex){+.+.}, at: [] lo_release+0x1b/0x190 [ 860.452778] 2 locks held by systemd-udevd/8065: [ 860.457443] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 [ 860.466151] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 [ 860.474296] 2 locks held by syz-executor282/11533: [ 860.479208] #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1cd0 [ 860.487851] #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1b/0x40 [ 860.496863] 2 locks held by syz-executor282/11535: [ 860.501908] #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1cd0 [ 860.510993] #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1b/0x40 [ 860.520001] 2 locks held by syz-executor282/11556: [ 860.524915] #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x67/0x3f0 [ 860.534072] #1: (&lo->lo_ctl_mutex){+.+.}, at: [] loop_control_ioctl+0x181/0x3f0 [ 860.543485] 2 locks held by syz-executor282/11557: [ 860.548415] #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1cd0 [ 860.557078] #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1b/0x40 [ 860.566270] 1 lock held by syz-executor282/11559: [ 860.571249] #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x67/0x3f0 [ 860.580441] 1 lock held by syz-executor282/11562: [ 860.585392] #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x67/0x3f0 [ 860.594553] [ 860.596169] ============================================= [ 860.596169] [ 860.603390] NMI backtrace for cpu 1 [ 860.607009] CPU: 1 PID: 1533 Comm: khungtaskd Not tainted 4.14.290-syzkaller #0 [ 860.614430] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 860.623773] Call Trace: [ 860.626345] dump_stack+0x1b2/0x281 [ 860.629954] nmi_cpu_backtrace.cold+0x57/0x93 [ 860.634431] ? irq_force_complete_move+0x350/0x350 [ 860.639337] nmi_trigger_cpumask_backtrace+0x13a/0x180 [ 860.644590] watchdog+0x5b9/0xb40 [ 860.648019] ? hungtask_pm_notify+0x50/0x50 [ 860.652316] kthread+0x30d/0x420 [ 860.655677] ? kthread_create_on_node+0xd0/0xd0 [ 860.660324] ret_from_fork+0x24/0x30 [ 860.664094] Sending NMI from CPU 1 to CPUs 0: [ 860.668641] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff8723f20e [ 860.669595] Kernel panic - not syncing: hung_task: blocked tasks [ 860.681989] CPU: 1 PID: 1533 Comm: khungtaskd Not tainted 4.14.290-syzkaller #0 [ 860.689409] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 860.698910] Call Trace: [ 860.701477] dump_stack+0x1b2/0x281 [ 860.705091] panic+0x1f9/0x42d [ 860.708283] ? add_taint.cold+0x16/0x16 [ 860.712236] watchdog+0x5ca/0xb40 [ 860.715665] ? hungtask_pm_notify+0x50/0x50 [ 860.719965] kthread+0x30d/0x420 [ 860.723307] ? kthread_create_on_node+0xd0/0xd0 [ 860.727951] ret_from_fork+0x24/0x30 [ 860.732079] Kernel Offset: disabled [ 860.735692] Rebooting in 86400 seconds..