[ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ 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 '10.128.0.60' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.784375] hfs: new node 0 already hashed? [ 27.788904] ------------[ cut here ]------------ [ 27.794007] WARNING: CPU: 0 PID: 7968 at fs/hfs/bnode.c:435 hfs_bnode_create.cold+0x1b/0x42 [ 27.802518] Kernel panic - not syncing: panic_on_warn set ... [ 27.802518] [ 27.809866] CPU: 0 PID: 7968 Comm: syz-executor289 Not tainted 4.14.301-syzkaller #0 [ 27.817757] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 27.827096] Call Trace: [ 27.829672] dump_stack+0x1b2/0x281 [ 27.833282] panic+0x1f9/0x42d [ 27.836462] ? add_taint.cold+0x16/0x16 [ 27.840426] ? hfs_bnode_create.cold+0x1b/0x42 [ 27.844994] ? hfs_bnode_create.cold+0x1b/0x42 [ 27.849565] __warn.cold+0x20/0x44 [ 27.853088] ? ist_end_non_atomic+0x10/0x10 [ 27.857397] ? hfs_bnode_create.cold+0x1b/0x42 [ 27.861970] report_bug+0x208/0x250 [ 27.865766] do_error_trap+0x195/0x2d0 [ 27.869640] ? math_error+0x2d0/0x2d0 [ 27.873425] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.878261] invalid_op+0x1b/0x40 [ 27.881732] RIP: 0010:hfs_bnode_create.cold+0x1b/0x42 [ 27.886900] RSP: 0018:ffff888095f573d8 EFLAGS: 00010286 [ 27.892243] RAX: 000000000000001f RBX: dffffc0000000000 RCX: 0000000000000000 [ 27.899502] RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed1012beae71 [ 27.906844] RBP: 0000000000000000 R08: 000000000000001f R09: 0000000000000000 [ 27.914098] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809aeaad00 [ 27.921357] R13: ffff8880b32365c0 R14: ffff8880b3236690 R15: 0000000000000000 [ 27.928630] ? hfs_bnode_create.cold+0x1b/0x42 [ 27.933194] ? hfs_bnode_put+0x18c/0x220 [ 27.937245] hfs_bmap_alloc+0x42c/0x530 [ 27.941211] ? hfs_bmap_reserve+0x370/0x370 [ 27.945535] ? cont_write_begin+0x4a3/0x740 [ 27.949846] ? hfs_bnode_unlink+0x2f8/0x5a0 [ 27.954153] ? __generic_file_write_iter+0x227/0x590 [ 27.959249] ? generic_file_write_iter+0x36f/0x650 [ 27.964252] ? __vfs_write+0x44c/0x630 [ 27.968130] ? vfs_write+0x17f/0x4d0 [ 27.971837] hfs_btree_inc_height.isra.0+0xbf/0x870 [ 27.976851] ? hfs_bnode_split+0xcf0/0xcf0 [ 27.981076] ? hfs_find_init+0x16f/0x220 [ 27.985134] ? __mutex_lock+0x360/0x1310 [ 27.989182] hfs_brec_insert+0x84c/0xa70 [ 27.993599] ? hfs_find_init+0x16f/0x220 [ 27.997650] ? fs_reclaim_release+0xd0/0x110 [ 28.002045] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 28.007489] ? hfs_brec_keylen+0x350/0x350 [ 28.011716] ? hfs_bmap_reserve+0x23a/0x370 [ 28.016037] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 28.021044] __hfs_ext_write_extent+0x3b4/0x4d0 [ 28.025703] hfs_ext_read_extent+0x73f/0x930 [ 28.030107] ? check_preemption_disabled+0x35/0x240 [ 28.035207] ? __hfs_ext_write_extent+0x4d0/0x4d0 [ 28.040046] ? clean_bdev_aliases+0x40d/0x510 [ 28.044531] hfs_extend_file+0x439/0xa40 [ 28.048583] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 28.054106] ? hfs_free_fork+0x870/0x870 [ 28.058186] ? __mark_inode_dirty+0x17d/0xf40 [ 28.062668] hfs_get_block+0x159/0x6d0 [ 28.066563] __block_write_begin_int+0x35c/0x11d0 [ 28.071400] ? hfs_extend_file+0xa40/0xa40 [ 28.075650] ? __breadahead_gfp+0x150/0x150 [ 28.079961] ? wait_for_stable_page+0xe3/0x260 [ 28.084530] ? hfs_extend_file+0xa40/0xa40 [ 28.088751] block_write_begin+0x58/0x270 [ 28.092886] cont_write_begin+0x4a3/0x740 [ 28.097026] ? block_write_begin+0x270/0x270 [ 28.101426] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 28.106431] ? iov_iter_fault_in_readable+0x1b9/0x360 [ 28.111611] hfs_write_begin+0x87/0x130 [ 28.115570] ? hfs_extend_file+0xa40/0xa40 [ 28.119799] generic_perform_write+0x1d5/0x430 [ 28.124370] ? __mnt_drop_write_file+0x5f/0x90 [ 28.128947] ? filemap_page_mkwrite+0x2d0/0x2d0 [ 28.133616] ? current_time+0xb0/0xb0 [ 28.137404] ? lock_acquire+0x170/0x3f0 [ 28.141390] __generic_file_write_iter+0x227/0x590 [ 28.146311] generic_file_write_iter+0x36f/0x650 [ 28.151060] ? iov_iter_init+0xa6/0x1c0 [ 28.155023] __vfs_write+0x44c/0x630 [ 28.158728] ? debug_check_no_obj_freed+0x2c0/0x680 [ 28.163732] ? kernel_read+0x110/0x110 [ 28.167613] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 28.172617] vfs_write+0x17f/0x4d0 [ 28.176142] SyS_write+0xf2/0x210 [ 28.179582] ? SyS_read+0x210/0x210 [ 28.183197] ? do_syscall_64+0x4c/0x640 [ 28.187158] ? SyS_read+0x210/0x210 [ 28.190775] do_syscall_64+0x1d5/0x640 [ 28.194658] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 28.199836] RIP: 0033:0x7fdfdc8577b9 [ 28.203548] RSP: 002b:00007ffe715bdae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 28.211362] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fdfdc8577b9 [ 28.218618] RDX: 00000000000ffe00 RSI: 0000000020004200 RDI: 0000000000000004 [ 28.225872] RBP: 00007fdfdc817050 R08: 0000000000000000 R09: 0000000000000000 [ 28.233211] R10: 000000000000024c R11: 0000000000000246 R12: 00007fdfdc8170e0 [ 28.240469] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 28.248046] Kernel Offset: disabled [ 28.251699] Rebooting in 86400 seconds..