[ 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..