[ 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 '10.128.0.60' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 490.598446] print_req_error: I/O error, dev loop1, sector 64 [ 490.604817] print_req_error: I/O error, dev loop1, sector 256 [ 490.610826] UDF-fs: error (device loop1): udf_read_tagged: read failed, block=256, location=256 [ 490.629203] print_req_error: I/O error, dev loop1, sector 512 [ 490.635471] UDF-fs: error (device loop1): udf_read_tagged: read failed, block=512, location=512 [ 490.646248] UDF-fs: warning (device loop1): udf_load_vrs: No anchor found [ 490.653918] UDF-fs: Scanning with blocksize 512 failed [ 490.659972] print_req_error: I/O error, dev loop1, sector 64 [ 490.666490] print_req_error: I/O error, dev loop1, sector 512 [ 490.672965] UDF-fs: error (device loop1): udf_read_tagged: read failed, block=256, location=256 [ 490.688682] print_req_error: I/O error, dev loop1, sector 1024 [ 490.694985] UDF-fs: error (device loop1): udf_read_tagged: read failed, block=512, location=512 [ 490.706194] UDF-fs: warning (device loop1): udf_load_vrs: No anchor found [ 490.713396] UDF-fs: Scanning with blocksize 1024 failed [ 490.726664] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.733431] UDF-fs: Scanning with blocksize 2048 failed [ 490.740180] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.747247] UDF-fs: Scanning with blocksize 4096 failed [ 490.757605] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.766111] UDF-fs: Scanning with blocksize 512 failed [ 490.775102] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.784442] UDF-fs: Scanning with blocksize 1024 failed [ 490.790224] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.798618] UDF-fs: Scanning with blocksize 2048 failed [ 490.805052] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.811736] UDF-fs: Scanning with blocksize 4096 failed [ 490.818899] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.826229] UDF-fs: Scanning with blocksize 512 failed [ 490.832296] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.839090] UDF-fs: Scanning with blocksize 1024 failed [ 490.844844] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.851503] UDF-fs: Scanning with blocksize 2048 failed [ 490.857252] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.864059] UDF-fs: Scanning with blocksize 4096 failed [ 490.870893] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.880963] UDF-fs: Scanning with blocksize 512 failed [ 490.886929] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.893947] UDF-fs: Scanning with blocksize 1024 failed [ 490.899691] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.917697] UDF-fs: Scanning with blocksize 2048 failed [ 490.923311] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.930970] UDF-fs: Scanning with blocksize 4096 failed [ 490.937746] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.944849] UDF-fs: Scanning with blocksize 512 failed [ 490.950415] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.957270] UDF-fs: Scanning with blocksize 1024 failed [ 490.962906] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.973704] UDF-fs: Scanning with blocksize 2048 failed [ 490.979776] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 490.987288] UDF-fs: Scanning with blocksize 4096 failed [ 490.993721] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found executing program [ 491.000493] UDF-fs: Scanning with blocksize 512 failed [ 491.006408] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 491.013078] UDF-fs: Scanning with blocksize 1024 failed [ 491.031459] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 491.042409] UDF-fs: Scanning with blocksize 2048 failed executing program [ 491.048847] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 491.061420] UDF-fs: Scanning with blocksize 4096 failed executing program executing program [ 491.356412] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 491.363178] UDF-fs: Scanning with blocksize 512 failed [ 491.369611] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 491.376940] UDF-fs: Scanning with blocksize 1024 failed [ 491.382573] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found [ 491.390017] UDF-fs: Scanning with blocksize 2048 failed [ 491.396078] UDF-fs: warning (device loop1): udf_load_vrs: No VRS found executing program executing program executing program executing program executing program [ 491.402741] UDF-fs: Scanning with blocksize 4096 failed [ 491.501480] print_req_error: I/O error, dev loop1, sector 64 [ 491.507793] print_req_error: I/O error, dev loop1, sector 256 [ 491.513854] UDF-fs: error (device loop1): udf_read_tagged: read failed, block=256, location=256 [ 491.522962] print_req_error: I/O error, dev loop1, sector 512 [ 491.530213] UDF-fs: error (device loop1): udf_read_tagged: read failed, block=512, location=512 executing program [ 717.563891] INFO: task syz-executor984:8223 blocked for more than 140 seconds. [ 717.571488] Not tainted 4.19.167-syzkaller #0 [ 717.577743] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.585927] syz-executor984 D29672 8223 8137 0x00000004 [ 717.591574] Call Trace: [ 717.594376] __schedule+0x887/0x2040 [ 717.598116] ? io_schedule_timeout+0x140/0x140 [ 717.602710] ? lock_downgrade+0x720/0x720 [ 717.607087] ? __mutex_lock+0x458/0x1260 [ 717.611169] schedule+0x8d/0x1b0 [ 717.614755] schedule_preempt_disabled+0xf/0x20 [ 717.619437] __mutex_lock+0x647/0x1260 [ 717.623337] ? mount_bdev+0x90/0x3b0 [ 717.627278] ? __mutex_add_waiter+0x160/0x160 [ 717.631786] ? __blkdev_get+0x1480/0x1480 [ 717.636159] ? wait_woken+0x250/0x250 [ 717.639986] ? bdev_read_only+0x6a/0x90 [ 717.644879] mount_bdev+0x90/0x3b0 [ 717.648438] ? udf_load_vrs+0xbf0/0xbf0 [ 717.652421] mount_fs+0xa3/0x30c [ 717.657434] vfs_kern_mount.part.0+0x68/0x470 [ 717.661953] do_mount+0x113c/0x2f10 [ 717.666710] ? lock_downgrade+0x720/0x720 [ 717.670870] ? lock_acquire+0x170/0x3c0 [ 717.677018] ? __might_fault+0xef/0x1d0 [ 717.681028] ? copy_mount_string+0x40/0x40 [ 717.686504] ? __might_fault+0x192/0x1d0 [ 717.690586] ? _copy_from_user+0xd2/0x130 [ 717.695882] ? copy_mount_options+0x26f/0x380 [ 717.700403] ksys_mount+0xcf/0x130 [ 717.705072] __x64_sys_mount+0xba/0x150 [ 717.709073] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.713668] do_syscall_64+0xf9/0x620 [ 717.719077] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.724972] RIP: 0033:0x44aa29 [ 717.728186] Code: Bad RIP value. [ 717.731544] RSP: 002b:00007f92b0e28db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 717.740937] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044aa29 [ 717.748914] RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 [ 717.756939] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 717.764920] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 717.772209] R13: 00007fff71f400ef R14: 00007f92b0e299c0 R15: 0000000000000000 [ 717.781528] INFO: task syz-executor984:8219 blocked for more than 140 seconds. [ 717.789652] Not tainted 4.19.167-syzkaller #0 [ 717.795419] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.803397] syz-executor984 D29672 8219 8140 0x00000004 [ 717.810217] Call Trace: [ 717.812836] __schedule+0x887/0x2040 [ 717.817645] ? io_schedule_timeout+0x140/0x140 [ 717.822412] ? mark_held_locks+0xa6/0xf0 [ 717.827714] ? rwsem_down_write_failed+0x3a5/0x760 [ 717.832663] schedule+0x8d/0x1b0 [ 717.837196] rwsem_down_write_failed+0x3aa/0x760 [ 717.842000] ? rwsem_down_read_failed_killable+0x580/0x580 [ 717.848821] ? migrate_swap_stop+0x900/0x900 [ 717.853248] ? mark_held_locks+0xf0/0xf0 [ 717.858463] ? set_bdev_super+0x110/0x110 [ 717.862628] call_rwsem_down_write_failed+0x13/0x20 [ 717.868789] down_write+0x4f/0x90 [ 717.872264] ? grab_super+0xa2/0x350 [ 717.877105] grab_super+0xa2/0x350 [ 717.880669] ? drop_super+0x90/0x90 [ 717.885809] ? sget_userns+0xcc/0xcd0 [ 717.889640] ? set_bdev_super+0x110/0x110 [ 717.896074] ? ns_test_super+0x50/0x50 [ 717.899986] sget_userns+0x352/0xcd0 [ 717.905676] ? set_bdev_super+0x110/0x110 [ 717.909849] ? ns_test_super+0x50/0x50 [ 717.913948] ? set_bdev_super+0x110/0x110 [ 717.918109] ? ns_test_super+0x50/0x50 [ 717.922001] sget+0x102/0x140 [ 717.925342] mount_bdev+0xf8/0x3b0 [ 717.928895] ? udf_load_vrs+0xbf0/0xbf0 [ 717.932877] mount_fs+0xa3/0x30c [ 717.936482] vfs_kern_mount.part.0+0x68/0x470 [ 717.940996] do_mount+0x113c/0x2f10 [ 717.944843] ? lock_downgrade+0x720/0x720 [ 717.949001] ? lock_acquire+0x170/0x3c0 [ 717.952975] ? __might_fault+0xef/0x1d0 [ 717.957185] ? copy_mount_string+0x40/0x40 [ 717.961438] ? __might_fault+0x192/0x1d0 [ 717.965713] ? _copy_from_user+0xd2/0x130 [ 717.969878] ? copy_mount_options+0x26f/0x380 [ 717.974616] ksys_mount+0xcf/0x130 [ 717.978173] __x64_sys_mount+0xba/0x150 [ 717.982151] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 717.986955] do_syscall_64+0xf9/0x620 [ 717.990776] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.996166] RIP: 0033:0x44aa29 [ 717.999379] Code: Bad RIP value. [ 718.002746] RSP: 002b:00007f92b0e28db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 718.010684] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044aa29 [ 718.018174] RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 [ 718.025627] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 718.032908] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 718.041127] R13: 00007fff71f400ef R14: 00007f92b0e299c0 R15: 0000000000000000 [ 718.048633] INFO: task syz-executor984:8222 blocked for more than 140 seconds. [ 718.056213] Not tainted 4.19.167-syzkaller #0 [ 718.061226] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 718.069399] syz-executor984 D29504 8222 8142 0x00000004 [ 718.075241] Call Trace: [ 718.077854] __schedule+0x887/0x2040 [ 718.081575] ? io_schedule_timeout+0x140/0x140 [ 718.086375] ? lock_downgrade+0x720/0x720 [ 718.090537] ? __mutex_lock+0x458/0x1260 [ 718.094798] schedule+0x8d/0x1b0 [ 718.098177] schedule_preempt_disabled+0xf/0x20 [ 718.102851] __mutex_lock+0x647/0x1260 [ 718.106950] ? mount_bdev+0x90/0x3b0 [ 718.110679] ? __mutex_add_waiter+0x160/0x160 [ 718.115412] ? __blkdev_get+0x1480/0x1480 [ 718.119577] ? wait_woken+0x250/0x250 [ 718.123387] ? bdev_read_only+0x6a/0x90 [ 718.127570] mount_bdev+0x90/0x3b0 [ 718.131122] ? udf_load_vrs+0xbf0/0xbf0 [ 718.135315] mount_fs+0xa3/0x30c [ 718.138703] vfs_kern_mount.part.0+0x68/0x470 [ 718.143206] do_mount+0x113c/0x2f10 [ 718.147048] ? lock_downgrade+0x720/0x720 [ 718.151207] ? lock_acquire+0x170/0x3c0 [ 718.155445] ? __might_fault+0xef/0x1d0 [ 718.159434] ? copy_mount_string+0x40/0x40 [ 718.164569] ? __might_fault+0x192/0x1d0 [ 718.168652] ? _copy_from_user+0xd2/0x130 [ 718.172806] ? copy_mount_options+0x26f/0x380 [ 718.177557] ksys_mount+0xcf/0x130 [ 718.181204] __x64_sys_mount+0xba/0x150 [ 718.185378] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 718.189992] do_syscall_64+0xf9/0x620 [ 718.193990] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.199282] RIP: 0033:0x44aa29 [ 718.202484] Code: Bad RIP value. [ 718.206057] RSP: 002b:00007f92b0e28db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 718.213977] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044aa29 [ 718.221266] RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 [ 718.228789] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 718.236270] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 718.243555] R13: 00007fff71f400ef R14: 00007f92b0e299c0 R15: 0000000000000000 [ 718.251083] INFO: task syz-executor984:8224 blocked for more than 140 seconds. [ 718.259023] Not tainted 4.19.167-syzkaller #0 [ 718.264199] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 718.272175] syz-executor984 D29672 8224 8143 0x00000004 [ 718.278052] Call Trace: [ 718.280659] __schedule+0x887/0x2040 [ 718.284558] ? io_schedule_timeout+0x140/0x140 [ 718.289156] ? lock_downgrade+0x720/0x720 [ 718.293309] ? __mutex_lock+0x458/0x1260 [ 718.298338] schedule+0x8d/0x1b0 [ 718.301729] schedule_preempt_disabled+0xf/0x20 [ 718.306620] __mutex_lock+0x647/0x1260 [ 718.310530] ? mount_bdev+0x90/0x3b0 [ 718.314459] ? __mutex_add_waiter+0x160/0x160 [ 718.318971] ? __blkdev_get+0x1480/0x1480 [ 718.323128] ? wait_woken+0x250/0x250 [ 718.327191] ? bdev_read_only+0x6a/0x90 [ 718.331190] mount_bdev+0x90/0x3b0 [ 718.334968] ? udf_load_vrs+0xbf0/0xbf0 [ 718.338960] mount_fs+0xa3/0x30c [ 718.342336] vfs_kern_mount.part.0+0x68/0x470 [ 718.347060] do_mount+0x113c/0x2f10 [ 718.350707] ? lock_downgrade+0x720/0x720 [ 718.355066] ? lock_acquire+0x170/0x3c0 [ 718.359054] ? __might_fault+0xef/0x1d0 [ 718.363034] ? copy_mount_string+0x40/0x40 [ 718.367492] ? __might_fault+0x192/0x1d0 [ 718.371572] ? _copy_from_user+0xd2/0x130 [ 718.375938] ? copy_mount_options+0x26f/0x380 [ 718.380452] ksys_mount+0xcf/0x130 [ 718.384182] __x64_sys_mount+0xba/0x150 [ 718.388169] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 718.392754] do_syscall_64+0xf9/0x620 [ 718.396812] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.402014] RIP: 0033:0x44aa29 [ 718.405409] Code: Bad RIP value. [ 718.408780] RSP: 002b:00007f92b0e28db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 718.416727] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044aa29 [ 718.424921] RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 [ 718.432201] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 718.439723] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 718.447207] R13: 00007fff71f400ef R14: 00007f92b0e299c0 R15: 0000000000000000 [ 718.454737] INFO: task syz-executor984:8247 blocked for more than 140 seconds. [ 718.462112] Not tainted 4.19.167-syzkaller #0 [ 718.467665] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 718.475859] syz-executor984 D29504 8247 8141 0x00000004 [ 718.481506] Call Trace: [ 718.484296] __schedule+0x887/0x2040 [ 718.488032] ? io_schedule_timeout+0x140/0x140 [ 718.492621] ? lock_downgrade+0x720/0x720 [ 718.496999] ? __mutex_lock+0x458/0x1260 [ 718.501080] schedule+0x8d/0x1b0 [ 718.504646] schedule_preempt_disabled+0xf/0x20 [ 718.509328] __mutex_lock+0x647/0x1260 [ 718.513231] ? mount_bdev+0x90/0x3b0 [ 718.517186] ? __mutex_add_waiter+0x160/0x160 [ 718.521701] ? __blkdev_get+0x1480/0x1480 [ 718.526054] ? lookup_bdev+0xac/0x220 [ 718.529876] ? bdev_read_only+0x6a/0x90 [ 718.534067] mount_bdev+0x90/0x3b0 [ 718.537621] ? udf_load_vrs+0xbf0/0xbf0 [ 718.541614] mount_fs+0xa3/0x30c [ 718.545218] vfs_kern_mount.part.0+0x68/0x470 [ 718.549739] do_mount+0x113c/0x2f10 [ 718.553380] ? lock_downgrade+0x720/0x720 [ 718.558485] ? lock_acquire+0x170/0x3c0 [ 718.562480] ? __might_fault+0xef/0x1d0 [ 718.566666] ? copy_mount_string+0x40/0x40 [ 718.570924] ? __might_fault+0x192/0x1d0 [ 718.575211] ? _copy_from_user+0xd2/0x130 [ 718.579382] ? copy_mount_options+0x26f/0x380 [ 718.584089] ksys_mount+0xcf/0x130 [ 718.587675] __x64_sys_mount+0xba/0x150 [ 718.591657] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 718.596490] do_syscall_64+0xf9/0x620 [ 718.600313] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.605732] RIP: 0033:0x44aa29 [ 718.608957] Code: Bad RIP value. [ 718.612322] RSP: 002b:00007f92b0e28db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 718.620274] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 000000000044aa29 [ 718.627783] RDX: 0000000020000040 RSI: 0000000020000280 RDI: 00000000200004c0 [ 718.635281] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 718.642570] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 718.650083] R13: 00007fff71f400ef R14: 00007f92b0e299c0 R15: 0000000000000000 [ 718.657620] [ 718.657620] Showing all locks held in the system: [ 718.664178] 1 lock held by khungtaskd/1569: [ 718.668511] #0: 000000009c04e342 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 718.677456] 1 lock held by in:imklog/7808: [ 718.681702] #0: 0000000014f05fa6 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 [ 718.690630] 2 locks held by syz-executor984/8220: [ 718.695707] 1 lock held by syz-executor984/8223: [ 718.700478] #0: 00000000886ab594 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 [ 718.709418] 2 locks held by syz-executor984/8219: [ 718.714468] #0: 00000000886ab594 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 [ 718.723169] #1: 00000000d837f47f (&type->s_umount_key#47){+.+.}, at: grab_super+0xa2/0x350 [ 718.731938] 1 lock held by syz-executor984/8222: [ 718.736949] #0: 00000000886ab594 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 [ 718.745858] 1 lock held by syz-executor984/8224: [ 718.750618] #0: 00000000886ab594 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 [ 718.759559] 1 lock held by syz-executor984/8247: [ 718.764508] #0: 00000000886ab594 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 [ 718.773245] [ 718.775096] ============================================= [ 718.775096] [ 718.782124] NMI backtrace for cpu 1 [ 718.785854] CPU: 1 PID: 1569 Comm: khungtaskd Not tainted 4.19.167-syzkaller #0 [ 718.793306] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.802666] Call Trace: [ 718.805299] dump_stack+0x1fc/0x2fe [ 718.808939] nmi_cpu_backtrace.cold+0x63/0xa2 [ 718.813444] ? lapic_can_unplug_cpu.cold+0x39/0x39 [ 718.818380] nmi_trigger_cpumask_backtrace+0x1a6/0x1eb [ 718.823666] watchdog+0x991/0xe60 [ 718.827128] ? reset_hung_task_detector+0x30/0x30 [ 718.831976] kthread+0x33f/0x460 [ 718.835372] ? kthread_park+0x180/0x180 [ 718.839351] ret_from_fork+0x24/0x30 [ 718.843278] Sending NMI from CPU 1 to CPUs 0: [ 718.848470] NMI backtrace for cpu 0 [ 718.848476] CPU: 0 PID: 4690 Comm: systemd-journal Not tainted 4.19.167-syzkaller #0 [ 718.848483] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.848487] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 [ 718.848498] Code: 00 6e 88 4c 89 25 dc 57 bf 0b 41 bc f4 ff ff ff e8 00 fa ea ff 48 c7 05 c6 57 bf 0b 00 00 00 00 e9 39 ec ff ff 90 48 8b 34 24 <65> 48 8b 04 25 80 df 01 00 65 8b 15 fc 0c 9d 7e 81 e2 00 01 1f 00 [ 718.848502] RSP: 0018:ffff8880a0c6f810 EFLAGS: 00000246 [ 718.848511] RAX: 0000000000000000 RBX: 00000003aeca44c4 RCX: ffffffff81ab9c52 [ 718.848516] RDX: 00000003aeca44c4 RSI: ffffffff81ab9c60 RDI: 0000000000000006 [ 718.848521] RBP: 00000003aeca44c4 R08: 0000000000000000 R09: 00000003aeca44c4 [ 718.848526] R10: 0000000000000006 R11: 0000000000000000 R12: 0000000000000000 [ 718.848532] R13: ffffed101431ca5f R14: ffff8880a18e52f0 R15: dffffc0000000000 [ 718.848537] FS: 00007faa928758c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 718.848542] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.848547] CR2: 00007faa8fc62000 CR3: 00000000a0c97000 CR4: 00000000001406f0 [ 718.848552] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.848558] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.848561] Call Trace: [ 718.848565] __d_lookup_rcu+0x270/0x6b0 [ 718.848568] lookup_fast+0x11b/0x1080 [ 718.848572] ? do_syscall_64+0xf9/0x620 [ 718.848577] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.848581] ? follow_managed+0xbc0/0xbc0 [ 718.848584] ? mark_held_locks+0xf0/0xf0 [ 718.848588] walk_component+0xde/0xda0 [ 718.848592] ? lookup_fast+0x1080/0x1080 [ 718.848596] ? lock_downgrade+0x720/0x720 [ 718.848599] ? path_init+0x1057/0x19d0 [ 718.848603] ? generic_permission+0x116/0x4d0 [ 718.848608] ? security_inode_permission+0xc5/0xf0 [ 718.848612] ? inode_permission.part.0+0x10c/0x450 [ 718.848616] link_path_walk.part.0+0x901/0x1230 [ 718.848620] ? walk_component+0xda0/0xda0 [ 718.848624] ? percpu_counter_add_batch+0x126/0x180 [ 718.848628] path_openat+0x1db/0x2df0 [ 718.848632] ? path_lookupat+0x8d0/0x8d0 [ 718.848636] ? __put_seccomp_filter+0xa0/0xa0 [ 718.848639] ? mark_held_locks+0xf0/0xf0 [ 718.848643] do_filp_open+0x18c/0x3f0 [ 718.848647] ? may_open_dev+0xf0/0xf0 [ 718.848651] ? lock_downgrade+0x720/0x720 [ 718.848654] ? lock_acquire+0x170/0x3c0 [ 718.848658] ? __alloc_fd+0x34/0x570 [ 718.848662] ? do_raw_spin_unlock+0x171/0x230 [ 718.848666] ? _raw_spin_unlock+0x29/0x40 [ 718.848670] ? __alloc_fd+0x28d/0x570 [ 718.848673] do_sys_open+0x3b3/0x520 [ 718.848677] ? filp_open+0x70/0x70 [ 718.848681] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 718.848686] ? trace_hardirqs_off_caller+0x6e/0x210 [ 718.848689] ? do_syscall_64+0x21/0x620 [ 718.848693] do_syscall_64+0xf9/0x620 [ 718.848698] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.848701] RIP: 0033:0x7faa91e05840 [ 718.848712] Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 [ 718.848716] RSP: 002b:00007ffeed1abc38 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 718.848725] RAX: ffffffffffffffda RBX: 00007ffeed1abf40 RCX: 00007faa91e05840 [ 718.848730] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000564bdd12c060 [ 718.848735] RBP: 000000000000000d R08: 00007faa91defc88 R09: 00000000ffffffff [ 718.848741] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 718.848746] R13: 0000564bdd11f040 R14: 00007ffeed1abf00 R15: 0000564bdd12c5f0 [ 718.850521] Kernel panic - not syncing: hung_task: blocked tasks [ 719.194763] CPU: 1 PID: 1569 Comm: khungtaskd Not tainted 4.19.167-syzkaller #0 [ 719.202219] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 719.211580] Call Trace: [ 719.214182] dump_stack+0x1fc/0x2fe [ 719.217824] panic+0x26a/0x50e [ 719.221027] ? __warn_printk+0xf3/0xf3 [ 719.224929] ? lapic_can_unplug_cpu.cold+0x39/0x39 [ 719.229870] ? ___preempt_schedule+0x16/0x18 [ 719.234302] ? watchdog+0x991/0xe60 [ 719.237938] ? nmi_trigger_cpumask_backtrace+0x15e/0x1eb [ 719.243402] watchdog+0x9a2/0xe60 [ 719.246872] ? reset_hung_task_detector+0x30/0x30 [ 719.251720] kthread+0x33f/0x460 [ 719.255094] ? kthread_park+0x180/0x180 [ 719.259075] ret_from_fork+0x24/0x30 [ 719.263294] Kernel Offset: disabled [ 719.266920] Rebooting in 86400 seconds..