[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.128' (ECDSA) to the list of known hosts. syzkaller login: [ 42.738248] IPVS: ftp: loaded support on port[0] = 21 executing program [ 42.802013] ------------[ cut here ]------------ [ 42.806870] kernel BUG at fs/hfs/inode.c:441! [ 42.812701] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 42.818059] Modules linked in: [ 42.821244] CPU: 0 PID: 22 Comm: kworker/u4:1 Not tainted 4.14.300-syzkaller #0 [ 42.828674] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 42.838022] Workqueue: writeback wb_workfn (flush-7:0) [ 42.843280] task: ffff8880b55ee5c0 task.stack: ffff8880b55f8000 [ 42.849317] RIP: 0010:hfs_write_inode+0x44c/0x860 [ 42.854147] RSP: 0018:ffff8880b55ff870 EFLAGS: 00010297 [ 42.859487] RAX: ffff8880b55ee5c0 RBX: 1ffff11016abff10 RCX: 0000000000000000 [ 42.866757] RDX: 0000000000000000 RSI: ffff8880b55ffab0 RDI: ffff8880b308e740 [ 42.874008] RBP: ffff8880b308e700 R08: ffffffff8b9c14b0 R09: 0000000000000002 [ 42.881261] R10: 0000000000000000 R11: ffff8880b55ee5c0 R12: 0000000000000000 [ 42.888517] R13: 0000000000000000 R14: ffffffff879b7ea0 R15: ffff8880b308e728 [ 42.895772] FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 42.903977] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.909835] CR2: 00007fc9b97b8000 CR3: 00000000a105f000 CR4: 00000000003406f0 [ 42.917083] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.924330] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.931586] Call Trace: [ 42.934181] ? hfs_inode_write_fork+0x1c0/0x1c0 [ 42.938829] ? deref_stack_reg+0x124/0x1a0 [ 42.943044] ? do_writepages+0x1bf/0x240 [ 42.947083] ? __writeback_single_inode+0x262/0x1010 [ 42.952169] ? lock_acquire+0x170/0x3f0 [ 42.956120] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 42.961547] __writeback_single_inode+0x6a4/0x1010 [ 42.966454] writeback_sb_inodes+0x48b/0xd30 [ 42.970843] ? wbc_detach_inode+0x780/0x780 [ 42.975141] ? queue_io+0x400/0x5a0 [ 42.978744] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 42.984170] wb_writeback+0x243/0xb80 [ 42.987952] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 42.993553] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 42.998979] wb_workfn+0x2bd/0xf50 [ 43.002498] ? process_one_work+0x6c4/0x14a0 [ 43.006883] ? inode_wait_for_writeback+0x30/0x30 [ 43.011703] ? lock_acquire+0x170/0x3f0 [ 43.015652] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 43.021080] process_one_work+0x793/0x14a0 [ 43.025294] ? work_busy+0x320/0x320 [ 43.028984] ? worker_thread+0x158/0xff0 [ 43.033021] ? _raw_spin_unlock_irq+0x24/0x80 [ 43.037501] worker_thread+0x5cc/0xff0 [ 43.041366] ? rescuer_thread+0xc80/0xc80 [ 43.045491] kthread+0x30d/0x420 [ 43.048834] ? kthread_create_on_node+0xd0/0xd0 [ 43.053479] ret_from_fork+0x24/0x30 [ 43.057168] Code: 41 5d 41 5e 41 5f c3 e8 13 44 7f ff 49 83 fd 03 0f 84 95 00 00 00 49 83 fd 04 74 11 49 83 fd 02 0f 84 69 fc ff ff e8 f4 43 7f ff <0f> 0b e8 ed 43 7f ff 48 8d 7d 28 48 b8 00 00 00 00 00 fc ff df [ 43.076258] RIP: hfs_write_inode+0x44c/0x860 RSP: ffff8880b55ff870 [ 43.095955] ---[ end trace d9fe64d357664566 ]--- [ 43.101126] Kernel panic - not syncing: Fatal exception [ 43.106662] Kernel Offset: disabled [ 43.110274] Rebooting in 86400 seconds..