[  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 '10.128.0.223' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   36.213267] audit: type=1400 audit(1588918182.964:8): avc:  denied  { execmem } for  pid=6363 comm="syz-executor269" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[   36.215522] kasan: CONFIG_KASAN_INLINE enabled
[   36.239239] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   36.248325] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   36.255073] Modules linked in:
[   36.258432] CPU: 0 PID: 6363 Comm: syz-executor269 Not tainted 4.14.179-syzkaller #0
[   36.266638] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   36.276402] task: ffff888099014380 task.stack: ffff88809b688000
[   36.283873] RIP: 0010:rb_erase+0x29/0x19b0
[   36.288239] RSP: 0018:ffff88809b68fa68 EFLAGS: 00010292
[   36.293733] RAX: dffffc0000000000 RBX: ffff8880825563f0 RCX: 1ffff110136d1f26
[   36.301687] RDX: 0000000000000001 RSI: ffffffff8a65dde0 RDI: 0000000000000008
[   36.309844] RBP: 0000000000000000 R08: ffffffff8a0f9bcc R09: 0000000000001e26
[   36.317249] R10: ffff88809b68f870 R11: ffff888099014380 R12: ffff888082557430
[   36.324693] R13: 0000000000000000 R14: ffff8880825574b8 R15: ffffffff8a65dde0
[   36.332472] FS:  0000000001683880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
[   36.341516] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   36.348109] CR2: 0000000020000040 CR3: 00000000a3a08000 CR4: 00000000001406f0
[   36.355568] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   36.363603] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   36.371303] Call Trace:
[   36.373982]  integrity_inode_free+0x119/0x300
[   36.378630]  security_inode_free+0x14/0x80
[   36.382930]  __destroy_inode+0x1e8/0x4c0
[   36.387231]  destroy_inode+0x49/0x110
[   36.391028]  iput+0x457/0x8d0
[   36.394324]  ? ext4_nfs_commit_metadata+0x2d0/0x2d0
[   36.400014]  ext4_ioctl+0x1471/0x3a00
[   36.404626]  ? avc_ss_reset+0x100/0x100
[   36.408721]  ? ext4_ioctl_check_immutable+0x1c0/0x1c0
[   36.414383]  ? do_sys_open+0x1f9/0x3f0
[   36.418260]  ? do_syscall_64+0x1d5/0x640
[   36.422683]  ? entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   36.428583]  ? find_held_lock+0x2d/0x110
[   36.432934]  ? debug_check_no_obj_freed+0x28e/0x6e4
[   36.438372]  ? lock_acquire+0x170/0x3f0
[   36.442612]  ? lock_downgrade+0x6e0/0x6e0
[   36.447388]  ? ext4_ioctl_check_immutable+0x1c0/0x1c0
[   36.456464]  do_vfs_ioctl+0x75a/0xfe0
[   36.460632]  ? selinux_file_mprotect+0x5c0/0x5c0
[   36.466928]  ? ioctl_preallocate+0x1a0/0x1a0
[   36.472007]  ? rcu_read_lock_sched_held+0x10a/0x130
[   36.480895]  ? kmem_cache_free+0x23a/0x2b0
[   36.488843]  ? putname+0xcd/0x110
[   36.493215]  ? security_file_ioctl+0x76/0xb0
[   36.498970]  ? security_file_ioctl+0x83/0xb0
[   36.505294]  SyS_ioctl+0x7f/0xb0
[   36.509277]  ? do_vfs_ioctl+0xfe0/0xfe0
[   36.513723]  do_syscall_64+0x1d5/0x640
[   36.518329]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   36.524294] RIP: 0033:0x4401b9
[   36.528300] RSP: 002b:00007ffcb5837c28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   36.537812] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401b9
[   36.546137] RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000003
[   36.553746] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   36.561498] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a40
[   36.572632] R13: 0000000000401ad0 R14: 0000000000000000 R15: 0000000000000000
[   36.580052] Code: 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 49 89 f7 41 56 41 55 49 89 fd 48 83 c7 08 48 89 fa 41 54 48 c1 ea 03 55 53 48 83 ec 18 <80> 3c 02 00 0f 85 f5 10 00 00 49 8d 7d 10 4d 8b 75 08 48 b8 00 
[   36.599453] RIP: rb_erase+0x29/0x19b0 RSP: ffff88809b68fa68
[   36.606439] ---[ end trace f045796b4111206f ]---
[   36.611913] Kernel panic - not syncing: Fatal exception
[   36.619380] Kernel Offset: disabled
[   36.623634] Rebooting in 86400 seconds..