[ 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 '10.128.0.183' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 529.821454] JFS: discard option not supported on device executing program [ 529.893672] JFS: discard option not supported on device executing program [ 529.959681] JFS: discard option not supported on device executing program [ 530.008424] JFS: discard option not supported on device [ 530.071130] JFS: discard option not supported on device executing program [ 530.142126] JFS: discard option not supported on device executing program executing program executing program [ 530.221511] JFS: discard option not supported on device executing program [ 530.268289] JFS: discard option not supported on device executing program [ 530.339489] JFS: discard option not supported on device executing program [ 530.415284] JFS: discard option not supported on device executing program [ 530.467621] JFS: discard option not supported on device executing program [ 530.527743] JFS: discard option not supported on device executing program [ 530.596552] JFS: discard option not supported on device executing program [ 530.658080] JFS: discard option not supported on device executing program [ 530.719274] JFS: discard option not supported on device executing program [ 530.760252] JFS: discard option not supported on device [ 530.828035] JFS: discard option not supported on device executing program executing program [ 530.901938] JFS: discard option not supported on device executing program [ 530.962451] JFS: discard option not supported on device executing program [ 531.007680] JFS: discard option not supported on device [ 531.060101] JFS: discard option not supported on device executing program executing program [ 531.140797] JFS: discard option not supported on device executing program executing program [ 531.201212] JFS: discard option not supported on device executing program [ 531.267658] JFS: discard option not supported on device executing program [ 531.318272] JFS: discard option not supported on device [ 531.387939] JFS: discard option not supported on device executing program executing program [ 531.460133] JFS: discard option not supported on device [ 531.530895] JFS: discard option not supported on device executing program executing program [ 531.608966] JFS: discard option not supported on device executing program [ 531.651726] JFS: discard option not supported on device executing program [ 531.701144] JFS: discard option not supported on device executing program executing program [ 531.764524] JFS: discard option not supported on device executing program [ 531.832768] JFS: discard option not supported on device executing program [ 531.890959] JFS: discard option not supported on device executing program [ 531.947357] JFS: discard option not supported on device [ 532.008228] JFS: discard option not supported on device executing program executing program [ 532.091580] JFS: discard option not supported on device executing program [ 532.150824] JFS: discard option not supported on device executing program [ 532.219672] JFS: discard option not supported on device executing program [ 532.277652] JFS: discard option not supported on device executing program [ 532.337376] JFS: discard option not supported on device executing program [ 532.401598] JFS: discard option not supported on device executing program [ 532.459231] JFS: discard option not supported on device [ 532.517977] JFS: discard option not supported on device executing program executing program [ 532.600906] JFS: discard option not supported on device executing program [ 532.667376] JFS: discard option not supported on device executing program [ 532.727342] JFS: discard option not supported on device executing program [ 532.801196] JFS: discard option not supported on device executing program [ 532.857715] JFS: discard option not supported on device [ 532.908010] JFS: discard option not supported on device executing program executing program [ 532.989517] JFS: discard option not supported on device executing program [ 533.038947] JFS: discard option not supported on device executing program [ 533.088149] JFS: discard option not supported on device executing program [ 533.148375] JFS: discard option not supported on device [ 533.207725] JFS: discard option not supported on device executing program [ 533.280771] JFS: discard option not supported on device executing program [ 533.360497] JFS: discard option not supported on device [ 533.370032] kasan: CONFIG_KASAN_INLINE enabled [ 533.374745] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 533.385258] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 533.391495] Modules linked in: [ 533.394688] CPU: 0 PID: 7967 Comm: syz-executor293 Not tainted 4.14.295-syzkaller #0 [ 533.402556] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 533.411899] task: ffff8880a5430680 task.stack: ffff88809c680000 [ 533.417935] RIP: 0010:lbmStartIO+0x14a/0x490 [ 533.422314] RSP: 0018:ffff88809c687af8 EFLAGS: 00010202 [ 533.427659] RAX: dffffc0000000000 RBX: ffff8880aa5d6600 RCX: 0000000000000003 [ 533.434904] RDX: 000000000000001c RSI: 0000000000000000 RDI: 00000000000000e0 [ 533.442151] RBP: ffff8880a8f9fdc0 R08: 0000000000000001 R09: ffff8880a8f9fdc0 [ 533.449395] R10: ffff8880a8f9fe47 R11: 0000000000000000 R12: ffff88809b130000 [ 533.456661] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 533.463909] FS: 000055555659b300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 533.472113] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 533.477969] CR2: 00007f2b4b3c2000 CR3: 00000000b5776000 CR4: 00000000003406f0 [ 533.485216] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 533.492461] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 533.500484] Call Trace: [ 533.503049] lbmWrite+0x254/0x380 [ 533.506475] lmNextPage.isra.0+0x263/0x700 [ 533.510682] lmWriteRecord+0x8b2/0xe30 [ 533.514544] ? mark_held_locks+0xa6/0xf0 [ 533.518595] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 533.523795] lmLogSync+0x126/0x660 [ 533.527312] ? lmWriteRecord+0xe30/0xe30 [ 533.531349] ? dqput+0x30/0x30 [ 533.534515] jfs_syncpt+0x66/0x70 [ 533.537942] jfs_sync_fs+0x80/0xa0 [ 533.541452] ? jfs_statfs+0x510/0x510 [ 533.545230] sync_filesystem+0xe2/0x230 [ 533.549180] generic_shutdown_super+0x70/0x370 [ 533.553737] kill_block_super+0x95/0xe0 [ 533.557686] deactivate_locked_super+0x6c/0xd0 [ 533.562239] deactivate_super+0x7f/0xa0 [ 533.566188] cleanup_mnt+0x186/0x2c0 [ 533.569876] task_work_run+0x11f/0x190 [ 533.573737] exit_to_usermode_loop+0x1ad/0x200 [ 533.578292] do_syscall_64+0x4a3/0x640 [ 533.582153] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 533.587315] RIP: 0033:0x7fd71c218847 [ 533.591000] RSP: 002b:00007fffeb69f9b8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 [ 533.598679] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd71c218847 [ 533.605919] RDX: 00007fffeb69fa7a RSI: 000000000000000a RDI: 00007fffeb69fa70 [ 533.613161] RBP: 00007fffeb69fa70 R08: 00000000ffffffff R09: 00007fffeb69f850 [ 533.620404] R10: 000055555659c683 R11: 0000000000000206 R12: 00007fffeb6a0ae0 [ 533.627645] R13: 000055555659c5f0 R14: 00007fffeb69f9e0 R15: 000000000000003c [ 533.634887] 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 [ 533.654051] RIP: lbmStartIO+0x14a/0x490 RSP: ffff88809c687af8 [ 533.665980] ---[ end trace 98756fba9e538bab ]--- [ 533.670739] Kernel panic - not syncing: Fatal exception [ 533.676257] Kernel Offset: disabled [ 533.679862] Rebooting in 86400 seconds..