[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 366.487378] JFS: discard option not supported on device executing program [ 366.590947] JFS: discard option not supported on device executing program [ 366.673330] JFS: discard option not supported on device executing program executing program [ 366.753110] JFS: discard option not supported on device [ 366.799301] JFS: discard option not supported on device executing program executing program executing program [ 366.899731] JFS: discard option not supported on device executing program [ 366.975814] JFS: discard option not supported on device executing program [ 367.027899] JFS: discard option not supported on device executing program [ 367.087907] JFS: discard option not supported on device executing program [ 367.159183] JFS: discard option not supported on device executing program [ 367.218399] JFS: discard option not supported on device executing program [ 367.287115] JFS: discard option not supported on device executing program [ 367.340303] JFS: discard option not supported on device [ 367.399516] JFS: discard option not supported on device executing program executing program [ 367.482365] JFS: discard option not supported on device [ 367.538805] JFS: discard option not supported on device executing program executing program executing program [ 367.621678] JFS: discard option not supported on device executing program [ 367.678824] JFS: discard option not supported on device [ 367.728901] JFS: discard option not supported on device executing program executing program executing program [ 367.811692] JFS: discard option not supported on device executing program executing program [ 367.875223] JFS: discard option not supported on device [ 367.941332] JFS: discard option not supported on device executing program executing program [ 368.014233] JFS: discard option not supported on device [ 368.068294] JFS: discard option not supported on device executing program executing program [ 368.145078] JFS: discard option not supported on device executing program [ 368.219358] JFS: discard option not supported on device [ 368.278682] JFS: discard option not supported on device executing program executing program [ 368.369965] JFS: discard option not supported on device executing program [ 368.441198] JFS: discard option not supported on device executing program [ 368.506814] JFS: discard option not supported on device [ 368.580194] JFS: discard option not supported on device executing program executing program [ 368.671800] JFS: discard option not supported on device executing program [ 368.728225] JFS: discard option not supported on device executing program [ 368.779797] JFS: discard option not supported on device [ 368.838990] JFS: discard option not supported on device executing program executing program [ 368.934803] JFS: discard option not supported on device executing program [ 368.987416] JFS: discard option not supported on device executing program [ 369.038424] JFS: discard option not supported on device executing program [ 369.097959] JFS: discard option not supported on device executing program [ 369.159314] JFS: discard option not supported on device executing program [ 369.208655] JFS: discard option not supported on device executing program [ 369.268549] JFS: discard option not supported on device executing program [ 369.337800] JFS: discard option not supported on device executing program [ 369.388812] JFS: discard option not supported on device executing program [ 369.449111] JFS: discard option not supported on device executing program [ 369.509590] JFS: discard option not supported on device executing program [ 369.568144] JFS: discard option not supported on device executing program executing program [ 369.632893] JFS: discard option not supported on device executing program [ 369.689531] JFS: discard option not supported on device executing program [ 369.742054] JFS: discard option not supported on device executing program [ 369.798919] JFS: discard option not supported on device executing program [ 369.858110] JFS: discard option not supported on device [ 369.927953] JFS: discard option not supported on device executing program executing program [ 370.003131] JFS: discard option not supported on device executing program [ 370.049238] JFS: discard option not supported on device [ 370.109384] JFS: discard option not supported on device executing program [ 370.191304] JFS: discard option not supported on device [ 370.211183] kasan: CONFIG_KASAN_INLINE enabled [ 370.216289] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 370.235838] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 370.242076] Modules linked in: [ 370.245247] CPU: 0 PID: 7970 Comm: syz-executor168 Not tainted 4.14.295-syzkaller #0 [ 370.253121] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 370.262458] task: ffff8880b3792140 task.stack: ffff888095bc8000 [ 370.268609] RIP: 0010:lbmStartIO+0x14a/0x490 [ 370.272988] RSP: 0018:ffff888095bcfaf8 EFLAGS: 00010202 [ 370.278326] RAX: dffffc0000000000 RBX: ffff8880aa64c400 RCX: 0000000000000003 [ 370.285569] RDX: 000000000000001c RSI: 0000000000000000 RDI: 00000000000000e0 [ 370.292810] RBP: ffff8880ab196b80 R08: 0000000000000001 R09: ffff8880ab196b80 [ 370.300052] R10: ffff8880ab196c07 R11: 0000000000000000 R12: ffff888095705b00 [ 370.307293] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 370.314547] FS: 0000555555a82300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 370.322756] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 370.328625] CR2: 000056106f833160 CR3: 00000000b6135000 CR4: 00000000003406f0 [ 370.335881] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 370.343129] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 370.350381] Call Trace: [ 370.352954] lbmWrite+0x254/0x380 [ 370.356387] lmNextPage.isra.0+0x263/0x700 [ 370.360600] lmWriteRecord+0x8b2/0xe30 [ 370.364466] ? mark_held_locks+0xa6/0xf0 [ 370.368504] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 370.373581] lmLogSync+0x126/0x660 [ 370.377095] ? lmWriteRecord+0xe30/0xe30 [ 370.381130] ? dqput+0x30/0x30 [ 370.384301] jfs_syncpt+0x66/0x70 [ 370.387729] jfs_sync_fs+0x80/0xa0 [ 370.391241] ? jfs_statfs+0x510/0x510 [ 370.395030] sync_filesystem+0xe2/0x230 [ 370.398987] generic_shutdown_super+0x70/0x370 [ 370.403555] kill_block_super+0x95/0xe0 [ 370.407505] deactivate_locked_super+0x6c/0xd0 [ 370.412062] deactivate_super+0x7f/0xa0 [ 370.416021] cleanup_mnt+0x186/0x2c0 [ 370.419817] task_work_run+0x11f/0x190 [ 370.423689] exit_to_usermode_loop+0x1ad/0x200 [ 370.428255] do_syscall_64+0x4a3/0x640 [ 370.432121] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 370.437285] RIP: 0033:0x7f31b96ff7b7 [ 370.440971] RSP: 002b:00007ffdac6261a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 [ 370.448663] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f31b96ff7b7 [ 370.455917] RDX: 00007ffdac62626a RSI: 000000000000000a RDI: 00007ffdac626260 [ 370.463170] RBP: 00007ffdac626260 R08: 00000000ffffffff R09: 00007ffdac626040 [ 370.470414] R10: 0000555555a83683 R11: 0000000000000202 R12: 00007ffdac6272d0 [ 370.477656] R13: 0000555555a835f0 R14: 00007ffdac6261d0 R15: 000000000000003e [ 370.484913] 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 [ 370.503976] RIP: lbmStartIO+0x14a/0x490 RSP: ffff888095bcfaf8 [ 370.510943] ---[ end trace a3b7dd4cfe8a87c2 ]--- [ 370.515703] Kernel panic - not syncing: Fatal exception [ 370.521124] Kernel Offset: disabled [ 370.524730] Rebooting in 86400 seconds..