[  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 '10.128.1.113' (ECDSA) to the list of known hosts.
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syzkaller login: [   34.871658] EXT4-fs warning (device loop2): ext4_enable_quotas:5779: Failed to enable quota tracking (type=-1, err=-22). Please run e2fsck to fix.
[   34.883868] EXT4-fs error (device loop4): ext4_fill_super:4382: inode #2: comm syz-executor708: iget: root inode unallocated
[   34.905552] EXT4-fs (loop4): get root inode failed
[   34.913324] EXT4-fs (loop4): mount failed
[   34.917767] EXT4-fs (loop2): mount failed
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[   34.934490] ------------[ cut here ]------------
[   34.939352] kernel BUG at fs/buffer.c:3106!
[   34.947918] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[   34.953287] Modules linked in:
[   34.956476] CPU: 1 PID: 8030 Comm: kmmpd-loop4 Not tainted 4.14.295-syzkaller #0
[   34.964007] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
[   34.973458] task: ffff888095e4e280 task.stack: ffff8880977c8000
[   34.979518] RIP: 0010:submit_bh_wbc+0x573/0x6f0
[   34.984180] RSP: 0018:ffff8880977cfd98 EFLAGS: 00010297
[   34.989538] RAX: ffff888095e4e280 RBX: ffff88808df95f18 RCX: 0000000000000000
[   34.996804] RDX: 0000000000000000 RSI: 0000000000003800 RDI: 0000000000000001
[   35.004156] RBP: ffff8880957fa440 R08: 0000000000000000 R09: 0000000000050414
[   35.011420] R10: ffff888095e4eb08 R11: ffff888095e4e280 R12: 0000000000003800
[   35.018683] R13: 0000000000000000 R14: 0000000000000001 R15: 00000000ffff9872
[   35.025950] FS:  0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
[   35.034166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   35.040044] CR2: 00007fbe4cd52f60 CR3: 00000000a5c83000 CR4: 00000000003406e0
[   35.047321] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   35.054582] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   35.061831] Call Trace:
[   35.064404]  write_mmp_block+0x1b4/0x2d0
[   35.068532]  kmmpd+0x655/0x990
[   35.071724]  ? write_mmp_block+0x2d0/0x2d0
[   35.076057]  ? write_mmp_block+0x2d0/0x2d0
[   35.080277]  kthread+0x30d/0x420
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[   35.083627]  ? kthread_create_on_node+0xd0/0xd0
[   35.088275]  ret_from_fork+0x24/0x30
[   35.091966] Code: 10 c2 ff f0 80 63 01 f7 e9 66 fb ff ff 48 8d 43 10 4c 8d 7b 20 48 89 44 24 08 e9 55 fc ff ff e8 c4 10 c2 ff 0f 0b e8 bd 10 c2 ff <0f> 0b e8 b6 10 c2 ff 0f 0b e8 af 10 c2 ff 0f 0b e8 a8 10 c2 ff 
[   35.111257] RIP: submit_bh_wbc+0x573/0x6f0 RSP: ffff8880977cfd98
executing program
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[   35.131738] ---[ end trace 8c469a9f1036fe3b ]---
[   35.137207] Kernel panic - not syncing: Fatal exception
[   35.142963] Kernel Offset: disabled
[   35.146579] Rebooting in 86400 seconds..