INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.62' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   28.978889] hfs: unable to locate alternate MDB
[   28.983852] hfs: continuing without an alternate MDB
[   28.993968] hfs: new node 0 already hashed?
[   28.998566] WARNING: CPU: 0 PID: 4477 at fs/hfs/bnode.c:416 hfs_bnode_create+0x30b/0x380
[   29.006796] Kernel panic - not syncing: panic_on_warn set ...
[   29.006796] 
[   29.014145] CPU: 0 PID: 4477 Comm: syzkaller579848 Not tainted 4.16.0+ #13
[   29.021395] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   29.030724] Call Trace:
[   29.033296]  dump_stack+0x1a7/0x27d
[   29.036910]  ? arch_local_irq_restore+0x53/0x53
[   29.041554]  ? vsnprintf+0x1ed/0x1900
[   29.045334]  panic+0x1f8/0x42c
[   29.048501]  ? refcount_error_report+0x214/0x214
[   29.053240]  ? show_regs_print_info+0x18/0x18
[   29.057711]  ? __warn+0x1c1/0x200
[   29.061149]  ? hfs_bnode_create+0x30b/0x380
[   29.065442]  __warn+0x1dc/0x200
[   29.068714]  ? hfs_bnode_create+0x30b/0x380
[   29.073021]  report_bug+0x1f4/0x2b0
[   29.076627]  fixup_bug.part.10+0x37/0x80
[   29.080660]  do_error_trap+0x2d7/0x3e0
[   29.084520]  ? math_error+0x400/0x400
[   29.088300]  ? hfs_bnode_create+0x3f/0x380
[   29.092512]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   29.097332]  do_invalid_op+0x1b/0x20
[   29.101025]  invalid_op+0x1b/0x40
[   29.104456] RIP: 0010:hfs_bnode_create+0x30b/0x380
[   29.109355] RSP: 0018:ffff8801ad477730 EFLAGS: 00010286
[   29.114692] RAX: 000000000000001f RBX: 0000000000000000 RCX: 0000000000000000
[   29.121941] RDX: 000000000000001f RSI: 1ffff10035a8ee9b RDI: ffffed0035a8eeda
[   29.129186] RBP: ffff8801ad477770 R08: ffffed003b604f99 R09: ffffed003b604f99
[   29.136431] R10: 0000000000000001 R11: ffffed003b604f98 R12: ffff8801d953ead0
[   29.143685] R13: ffff8801d953ea00 R14: ffff8801d0811c00 R15: 0000000000000000
[   29.150953]  hfs_bmap_alloc+0x804/0xee0
[   29.154907]  ? hfs_btree_write+0x460/0x460
[   29.159120]  ? check_same_owner+0x320/0x320
[   29.163413]  ? check_same_owner+0x320/0x320
[   29.167711]  ? rcu_note_context_switch+0x710/0x710
[   29.172615]  ? rcu_note_context_switch+0x710/0x710
[   29.177520]  hfs_bnode_split+0xc0/0xfb0
[   29.181470]  ? memcpy+0x45/0x50
[   29.184734]  ? hfs_bnode_read+0xba/0xe0
[   29.188685]  ? hfs_bnode_put+0x30/0x30
[   29.192547]  ? hfs_find_exit+0xd0/0xd0
[   29.196410]  hfs_brec_insert+0x366/0xb90
[   29.200450]  ? hfs_brec_keylen+0x330/0x330
[   29.204667]  hfs_cat_create+0xa06/0xd80
[   29.208619]  ? hfs_cat_build_key+0x1b0/0x1b0
[   29.213023]  ? hfs_mark_mdb_dirty+0x179/0x1e0
[   29.217500]  ? make_kprojid+0x30/0x30
[   29.221279]  ? debug_lockdep_rcu_enabled+0x77/0x90
[   29.226188]  ? security_inode_permission+0xbb/0xf0
[   29.231090]  hfs_mkdir+0x6a/0xd0
[   29.234432]  vfs_mkdir+0x390/0x600
[   29.237957]  do_mkdirat+0x224/0x2b0
[   29.241560]  ? SyS_mknod+0x40/0x40
[   29.245077]  ? trace_event_raw_event_sys_exit+0x260/0x260
[   29.250591]  ? ksys_ioctl+0x6c/0xb0
[   29.254196]  ? do_syscall_64+0xb7/0x940
[   29.258146]  SyS_mkdir+0x22/0x30
[   29.261487]  ? SyS_mkdirat+0x30/0x30
[   29.265178]  do_syscall_64+0x281/0x940
[   29.269046]  ? vmalloc_sync_all+0x30/0x30
[   29.273170]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   29.277901]  ? syscall_return_slowpath+0x550/0x550
[   29.282804]  ? syscall_return_slowpath+0x2ac/0x550
[   29.287712]  ? prepare_exit_to_usermode+0x350/0x350
[   29.292705]  ? entry_SYSCALL_64_after_hwframe+0x52/0xb7
[   29.298048]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   29.302869]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   29.308047] RIP: 0033:0x440739
[   29.311214] RSP: 002b:00007ffe4d841778 EFLAGS: 00000207 ORIG_RAX: 0000000000000053
[   29.318896] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440739
[   29.326237] RDX: 0000000000401030 RSI: 0000000000000021 RDI: 0000000020000180
[   29.333482] RBP: 0000000000000003 R08: 000000000000000a R09: 6f6f6c2f7665642f
[   29.340731] R10: 0000000020011700 R11: 0000000000000207 R12: 0000000000000004
[   29.347977] R13: 0000000000401fb0 R14: 0000000000000000 R15: 0000000000000000
[   29.355898] Dumping ftrace buffer:
[   29.359575]    (ftrace buffer empty)
[   29.363260] Kernel Offset: disabled
[   29.366869] Rebooting in 86400 seconds..