[  OK  ] Started Getty on tty2.
[  OK  ] Started Getty on tty1.
[  OK  ] Started Serial Getty on ttyS0.
[  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.
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Load/Save RF Kill Switch Status.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.189' (ECDSA) to the list of known hosts.
syzkaller login: [   33.134999] IPVS: ftp: loaded support on port[0] = 21
executing program
[   33.232617] ------------[ cut here ]------------
[   33.237481] kernel BUG at fs/hfs/inode.c:441!
[   33.242725] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[   33.248097] CPU: 1 PID: 3602 Comm: kworker/u4:5 Not tainted 4.19.211-syzkaller #0
[   33.255706] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
[   33.265055] Workqueue: writeback wb_workfn (flush-7:0)
[   33.270319] RIP: 0010:hfs_write_inode+0x4f2/0x930
[   33.275139] Code: ae 7d 88 4c 89 ef e8 ed f7 63 ff 49 83 fd 03 0f 84 95 00 00 00 49 83 fd 04 74 11 49 83 fd 02 0f 84 ed fb ff ff e8 1e f6 63 ff <0f> 0b e8 17 f6 63 ff 48 8d 7d 28 48 b8 00 00 00 00 00 fc ff df 48
[   33.294105] RSP: 0018:ffff8880a883f7b8 EFLAGS: 00010293
[   33.299443] RAX: ffff8880a88ec300 RBX: 1ffff11015107ef9 RCX: ffffffff81fe8f33
[   33.306690] RDX: 0000000000000000 RSI: ffffffff81fe8f52 RDI: 0000000000000007
[   33.313936] RBP: ffff888095bcc700 R08: 0000000000000000 R09: 0000000000000004
[   33.321179] R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
[   33.328426] R13: 0000000000000000 R14: ffffffff887dcd20 R15: ffff888095bcc728
[   33.335750] FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
[   33.343960] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.349825] CR2: 000055f14f67a8a8 CR3: 00000000a9538000 CR4: 00000000003406e0
[   33.357079] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.364329] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.371583] Call Trace:
[   33.374166]  ? hfs_inode_write_fork+0x1c0/0x1c0
[   33.378818]  ? do_writepages+0x1f5/0x290
[   33.382864]  ? __writeback_single_inode+0x306/0x11d0
[   33.387955]  ? lock_downgrade+0x720/0x720
[   33.392091]  ? lock_acquire+0x170/0x3c0
[   33.396049]  ? check_preemption_disabled+0x41/0x280
[   33.401052]  __writeback_single_inode+0x733/0x11d0
[   33.405975]  writeback_sb_inodes+0x537/0xef0
[   33.410373]  ? wbc_detach_inode+0x840/0x840
[   33.414761]  ? rcu_read_lock_sched_held+0x16c/0x1d0
[   33.419761]  ? queue_io+0x448/0x590
[   33.423375]  wb_writeback+0x28d/0xcc0
[   33.427163]  ? writeback_inodes_wb.constprop.0+0x1d0/0x1d0
[   33.432774]  wb_workfn+0x29b/0x1250
[   33.436389]  ? inode_wait_for_writeback+0x30/0x30
[   33.441216]  ? check_preemption_disabled+0x41/0x280
[   33.446214]  process_one_work+0x864/0x1570
[   33.450435]  ? pwq_dec_nr_in_flight+0x2d0/0x2d0
[   33.455089]  worker_thread+0x64c/0x1130
[   33.459044]  ? __kthread_parkme+0x133/0x1e0
[   33.463433]  ? process_one_work+0x1570/0x1570
[   33.467906]  kthread+0x33f/0x460
[   33.471252]  ? kthread_park+0x180/0x180
[   33.475204]  ret_from_fork+0x24/0x30
[   33.478895] Modules linked in:
[   33.483004] ---[ end trace beb4931e7add733d ]---
[   33.487906] RIP: 0010:hfs_write_inode+0x4f2/0x930
[   33.492958] Code: ae 7d 88 4c 89 ef e8 ed f7 63 ff 49 83 fd 03 0f 84 95 00 00 00 49 83 fd 04 74 11 49 83 fd 02 0f 84 ed fb ff ff e8 1e f6 63 ff <0f> 0b e8 17 f6 63 ff 48 8d 7d 28 48 b8 00 00 00 00 00 fc ff df 48
[   33.512135] RSP: 0018:ffff8880a883f7b8 EFLAGS: 00010293
[   33.517481] RAX: ffff8880a88ec300 RBX: 1ffff11015107ef9 RCX: ffffffff81fe8f33
[   33.525104] RDX: 0000000000000000 RSI: ffffffff81fe8f52 RDI: 0000000000000007
[   33.532562] RBP: ffff888095bcc700 R08: 0000000000000000 R09: 0000000000000004
[   33.539989] R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
[   33.547250] R13: 0000000000000000 R14: ffffffff887dcd20 R15: ffff888095bcc728
[   33.555304] FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
[   33.563739] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   33.569802] CR2: 000055f14f67a8a8 CR3: 00000000a9538000 CR4: 00000000003406e0
[   33.577322] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.584993] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.592647] Kernel panic - not syncing: Fatal exception
[   33.598074] Kernel Offset: disabled
[   33.601685] Rebooting in 86400 seconds..