[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.254' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 653.150979] JFS: discard option not supported on device executing program [ 653.215739] JFS: discard option not supported on device executing program [ 653.278427] JFS: discard option not supported on device executing program [ 653.323930] JFS: discard option not supported on device executing program [ 653.379038] JFS: discard option not supported on device executing program [ 653.424405] JFS: discard option not supported on device [ 653.487815] JFS: discard option not supported on device executing program executing program [ 653.578671] JFS: discard option not supported on device executing program [ 653.624059] JFS: discard option not supported on device executing program executing program [ 653.666125] JFS: discard option not supported on device executing program [ 653.734203] JFS: discard option not supported on device executing program [ 653.785424] JFS: discard option not supported on device executing program [ 653.847256] JFS: discard option not supported on device executing program [ 653.903748] JFS: discard option not supported on device executing program [ 653.954994] JFS: discard option not supported on device executing program [ 654.018212] JFS: discard option not supported on device [ 654.073652] JFS: discard option not supported on device executing program executing program [ 654.148541] JFS: discard option not supported on device executing program [ 654.212552] JFS: discard option not supported on device executing program [ 654.273997] JFS: discard option not supported on device executing program [ 654.333874] JFS: discard option not supported on device [ 654.395453] JFS: discard option not supported on device executing program executing program [ 654.468778] JFS: discard option not supported on device executing program [ 654.534703] JFS: discard option not supported on device executing program [ 654.594502] JFS: discard option not supported on device executing program [ 654.646450] JFS: discard option not supported on device [ 654.694096] JFS: discard option not supported on device executing program executing program [ 654.787214] JFS: discard option not supported on device [ 654.833598] JFS: discard option not supported on device executing program [ 654.942193] JFS: discard option not supported on device executing program [ 655.026348] JFS: discard option not supported on device executing program executing program [ 655.116860] JFS: discard option not supported on device executing program [ 655.175679] JFS: discard option not supported on device [ 655.244048] JFS: discard option not supported on device executing program executing program [ 655.323957] JFS: discard option not supported on device executing program [ 655.373780] JFS: discard option not supported on device [ 655.425810] JFS: discard option not supported on device executing program executing program [ 655.500195] JFS: discard option not supported on device [ 655.544623] JFS: discard option not supported on device executing program [ 655.617256] JFS: discard option not supported on device executing program executing program [ 655.696293] JFS: discard option not supported on device executing program [ 655.744944] JFS: discard option not supported on device executing program [ 655.810666] JFS: discard option not supported on device executing program [ 655.913630] JFS: discard option not supported on device executing program [ 655.964803] JFS: discard option not supported on device executing program [ 656.015345] JFS: discard option not supported on device executing program [ 656.073628] JFS: discard option not supported on device [ 656.146451] JFS: discard option not supported on device executing program executing program [ 656.237215] JFS: discard option not supported on device executing program [ 656.284210] JFS: discard option not supported on device executing program [ 656.343824] JFS: discard option not supported on device executing program [ 656.411477] JFS: discard option not supported on device executing program [ 656.470373] JFS: discard option not supported on device executing program executing program [ 656.553301] JFS: discard option not supported on device executing program [ 656.603584] JFS: discard option not supported on device executing program [ 656.663590] JFS: discard option not supported on device [ 656.723814] JFS: discard option not supported on device [ 656.738751] kasan: CONFIG_KASAN_INLINE enabled [ 656.743765] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 656.755443] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 656.761687] Modules linked in: [ 656.764874] CPU: 0 PID: 7991 Comm: syz-executor587 Not tainted 4.14.295-syzkaller #0 [ 656.772739] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 656.782081] task: ffff888095f86680 task.stack: ffff888095e18000 [ 656.788121] RIP: 0010:lbmStartIO+0x14a/0x490 [ 656.792501] RSP: 0018:ffff888095e1faf8 EFLAGS: 00010202 [ 656.797838] RAX: dffffc0000000000 RBX: ffff8880aa9c9f00 RCX: 0000000000000003 [ 656.805082] RDX: 000000000000001c RSI: 0000000000000000 RDI: 00000000000000e0 [ 656.812325] RBP: ffff8880ab66d940 R08: 0000000000000001 R09: ffff8880ab66d940 [ 656.819568] R10: ffff8880ab66d9c7 R11: 0000000000000000 R12: ffff8880b4fe4900 [ 656.826820] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 656.834066] FS: 0000555556dad300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 656.842272] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 656.848211] CR2: 00007ffd68ebbe98 CR3: 0000000098b76000 CR4: 00000000003406f0 [ 656.855463] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 656.862707] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 656.869950] Call Trace: [ 656.872514] lbmWrite+0x254/0x380 [ 656.875941] lmNextPage.isra.0+0x263/0x700 [ 656.880148] lmWriteRecord+0x8b2/0xe30 [ 656.884014] ? mark_held_locks+0xa6/0xf0 [ 656.888051] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 656.893130] lmLogSync+0x126/0x660 [ 656.896643] ? lmWriteRecord+0xe30/0xe30 [ 656.900679] ? dqput+0x30/0x30 [ 656.903844] jfs_syncpt+0x66/0x70 [ 656.907275] jfs_sync_fs+0x80/0xa0 [ 656.910786] ? jfs_statfs+0x510/0x510 [ 656.914558] sync_filesystem+0xe2/0x230 [ 656.918507] generic_shutdown_super+0x70/0x370 [ 656.923093] kill_block_super+0x95/0xe0 [ 656.927046] deactivate_locked_super+0x6c/0xd0 [ 656.931622] deactivate_super+0x7f/0xa0 [ 656.935568] cleanup_mnt+0x186/0x2c0 [ 656.939257] task_work_run+0x11f/0x190 [ 656.943219] exit_to_usermode_loop+0x1ad/0x200 [ 656.947774] do_syscall_64+0x4a3/0x640 [ 656.951639] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 656.956800] RIP: 0033:0x7fbce2fa0817 [ 656.960487] RSP: 002b:00007ffd68ebc5d8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 [ 656.968170] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fbce2fa0817 [ 656.975499] RDX: 00007ffd68ebc69a RSI: 000000000000000a RDI: 00007ffd68ebc690 [ 656.982745] RBP: 00007ffd68ebc690 R08: 00000000ffffffff R09: 00007ffd68ebc470 [ 656.990074] R10: 0000555556dae683 R11: 0000000000000206 R12: 00007ffd68ebd700 [ 656.997318] R13: 0000555556dae5f0 R14: 00007ffd68ebc600 R15: 000000000000003b [ 657.004562] Code: 48 c1 ea 03 80 3c 02 00 0f 85 06 03 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6c 24 20 49 8d bd e0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d5 02 00 00 4d 8b ad e0 00 00 00 4d 39 ee 74 [ 657.023710] RIP: lbmStartIO+0x14a/0x490 RSP: ffff888095e1faf8 [ 657.031587] ---[ end trace 86809c49a6b76f70 ]--- [ 657.036351] Kernel panic - not syncing: Fatal exception [ 657.041904] Kernel Offset: disabled [ 657.045526] Rebooting in 86400 seconds..