[  OK  ] Started Getty on tty2.
[  OK  ] Started Serial Getty on ttyS0.
[  OK  ] Started Getty on tty1.
[  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 '10.128.10.39' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   29.591008] kasan: CONFIG_KASAN_INLINE enabled
[   29.596782] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   29.604676] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   29.610927] Modules linked in:
[   29.614191] CPU: 1 PID: 7986 Comm: syz-executor734 Not tainted 4.14.231-syzkaller #0
[   29.622620] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   29.632847] task: ffff8880b39b4680 task.stack: ffff88809bbc0000
[   29.639155] RIP: 0010:rb_erase+0x29/0x1290
[   29.643525] RSP: 0018:ffff88809bbc7a68 EFLAGS: 00010292
[   29.648937] RAX: dffffc0000000000 RBX: ffff88808e819630 RCX: 1ffff11013778f27
[   29.657566] RDX: 0000000000000001 RSI: ffffffff8bf99ea0 RDI: 0000000000000008
[   29.664920] RBP: 0000000000000000 R08: ffffffff8ba2d02c R09: 0000000000001bf0
[   29.672531] R10: 0000000000000001 R11: ffff8880b39b4680 R12: 0000000000000000
[   29.679896] R13: dffffc0000000000 R14: ffff88808df5b7f8 R15: ffffffff8bf99ea0
[   29.687162] FS:  000000000108b300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
[   29.696536] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   29.702607] CR2: 0000000020002000 CR3: 000000009779c000 CR4: 00000000001406e0
[   29.712169] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   29.720650] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   29.728092] Call Trace:
[   29.730681]  integrity_inode_free+0x119/0x300
[   29.735173]  security_inode_free+0x14/0x80
[   29.739624]  __destroy_inode+0x1e8/0x4d0
[   29.743689]  destroy_inode+0x49/0x110
[   29.747478]  iput+0x458/0x7e0
[   29.750572]  ? ext4_mark_dquot_dirty+0x190/0x190
[   29.755324]  ext4_ioctl+0x16c5/0x3870
[   29.759131]  ? ext4_ioctl_check_immutable+0x1c0/0x1c0
[   29.764315]  ? putname+0xcd/0x110
[   29.768026]  ? do_sys_open+0x203/0x410
[   29.771899]  ? do_syscall_64+0x1d5/0x640
[   29.776034]  ? entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   29.781393]  ? path_lookupat+0x780/0x780
[   29.785439]  ? debug_check_no_obj_freed+0x2c0/0x680
[   29.790499]  ? lock_acquire+0x170/0x3f0
[   29.794711]  ? lock_downgrade+0x740/0x740
[   29.798872]  ? _raw_spin_unlock_irqrestore+0x66/0xe0
[   29.804000]  ? debug_check_no_obj_freed+0x2c0/0x680
[   29.809054]  ? ext4_ioctl_check_immutable+0x1c0/0x1c0
[   29.814349]  do_vfs_ioctl+0x75a/0xff0
[   29.818145]  ? rcu_lockdep_current_cpu_online+0xed/0x140
[   29.823608]  ? ioctl_preallocate+0x1a0/0x1a0
[   29.828004]  ? kmem_cache_free+0x23a/0x2b0
[   29.832229]  ? putname+0xcd/0x110
[   29.835682]  ? do_sys_open+0x208/0x410
[   29.839738]  ? filp_open+0x60/0x60
[   29.843282]  ? security_file_ioctl+0x83/0xb0
[   29.847679]  SyS_ioctl+0x7f/0xb0
[   29.851062]  ? do_vfs_ioctl+0xff0/0xff0
[   29.855035]  do_syscall_64+0x1d5/0x640
[   29.858919]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   29.865075] RIP: 0033:0x43ee79
[   29.868350] RSP: 002b:00007ffe1bc77148 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   29.876075] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee79
[   29.883593] RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000004
[   29.890858] RBP: 0000000000402e60 R08: 0000000000000000 R09: 0000000000400488
[   29.898197] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402ef0
[   29.905640] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488
[   29.912916] Code: ff ff 48 b8 00 00 00 00 00 fc ff df 41 57 49 89 f7 41 56 41 55 41 54 49 89 fc 48 83 c7 08 48 89 fa 55 48 c1 ea 03 53 48 83 ec 18 <80> 3c 02 00 0f 85 f2 0c 00 00 49 8d 7c 24 10 4d 8b 74 24 08 48 
[   29.932335] RIP: rb_erase+0x29/0x1290 RSP: ffff88809bbc7a68
[   29.938146] ---[ end trace dc39a47eac5a2846 ]---
[   29.942942] Kernel panic - not syncing: Fatal exception
[   29.948741] Kernel Offset: disabled
[   29.952381] Rebooting in 86400 seconds..