[  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.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.123' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   35.563475] MINIX-fs: mounting unchecked file system, running fsck is recommended
[   35.582277] ------------[ cut here ]------------
[   35.587128] WARNING: CPU: 1 PID: 6334 at fs/inode.c:342 inc_nlink+0x113/0x130
[   35.594398] Kernel panic - not syncing: panic_on_warn set ...
[   35.594398] 
[   35.601757] CPU: 1 PID: 6334 Comm: syz-executor276 Not tainted 4.14.175-syzkaller #0
[   35.609644] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   35.619002] Call Trace:
[   35.621585]  dump_stack+0x13e/0x194
[   35.625219]  panic+0x1f9/0x42d
[   35.628418]  ? add_taint.cold+0x16/0x16
[   35.632435]  ? inc_nlink+0x113/0x130
[   35.636158]  ? inc_nlink+0x113/0x130
[   35.639884]  __warn.cold+0x2f/0x30
[   35.643401]  ? ist_end_non_atomic+0x10/0x10
[   35.647717]  ? inc_nlink+0x113/0x130
[   35.651407]  report_bug+0x20a/0x248
[   35.655017]  do_error_trap+0x195/0x2d0
[   35.658887]  ? math_error+0x2d0/0x2d0
[   35.662674]  ? avc_has_perm_noaudit+0x400/0x400
[   35.667327]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   35.672249]  invalid_op+0x1b/0x40
[   35.675703] RIP: 0010:inc_nlink+0x113/0x130
[   35.680010] RSP: 0018:ffff8880986d7db0 EFLAGS: 00010297
[   35.685367] RAX: ffff8880978923c0 RBX: ffff888082294970 RCX: 1ffff11012f12586
[   35.692628] RDX: 0000000000000000 RSI: ffff888083275b40 RDI: ffff888082294a48
[   35.699886] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000002
[   35.707130] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880822949b8
[   35.714385] R13: ffff888083275b40 R14: ffff888083275b98 R15: 0000000000000000
[   35.721647]  minix_mkdir+0x5a/0x160
[   35.725399]  ? minix_create+0x30/0x30
[   35.729183]  ? security_inode_mkdir+0xcc/0x100
[   35.733763]  vfs_mkdir+0x3af/0x620
[   35.737285]  SyS_mkdirat+0x1bc/0x210
[   35.741047]  ? SyS_mknod+0x390/0x390
[   35.744740]  ? __close_fd+0x159/0x230
[   35.748535]  ? do_syscall_64+0x4c/0x640
[   35.752516]  ? SyS_mknod+0x390/0x390
[   35.756220]  do_syscall_64+0x1d5/0x640
[   35.760138]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   35.765308] RIP: 0033:0x444a69
[   35.768475] RSP: 002b:00007ffe1e679e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
[   35.776158] RAX: ffffffffffffffda RBX: 00007ffe1e679e60 RCX: 0000000000444a69
[   35.783542] RDX: 0000000000000100 RSI: 0000000020000300 RDI: 0000000000000003
[   35.790796] RBP: 0000000000000000 R08: 0000000000400e50 R09: 0000000000400e50
[   35.798078] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004026d0
[   35.805343] R13: 0000000000402760 R14: 0000000000000000 R15: 0000000000000000
[   35.813797] Kernel Offset: disabled
[   35.817488] Rebooting in 86400 seconds..