[  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 '10.128.15.195' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   47.659674] audit: type=1400 audit(1592420555.657:8): avc:  denied  { execmem } for  pid=6338 comm="syz-executor841" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[   47.661705] kasan: CONFIG_KASAN_INLINE enabled
[   47.684411] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   47.691802] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   47.698017] Modules linked in:
[   47.701212] CPU: 0 PID: 6338 Comm: syz-executor841 Not tainted 4.14.184-syzkaller #0
[   47.709063] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   47.718599] task: ffff888087184140 task.stack: ffff88808ee28000
[   47.724641] RIP: 0010:rb_erase+0x29/0x1890
[   47.728848] RSP: 0018:ffff88808ee2fa60 EFLAGS: 00010286
[   47.734187] RAX: dffffc0000000000 RBX: ffff888083627830 RCX: 0000000000000001
[   47.741434] RDX: 0000000000000001 RSI: ffffffff8a453fa0 RDI: 0000000000000008
[   47.748724] RBP: 0000000000000000 R08: ffffffff89eefe5c R09: 0000000000001e3c
[   47.755989] R10: ffff88808ee2f870 R11: ffff888087184140 R12: 0000000000000000
[   47.763235] R13: dffffc0000000000 R14: ffff88808364f478 R15: ffffffff8a453fa0
[   47.770483] FS:  0000000000b74880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
[   47.778726] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.784583] CR2: 0000000020000100 CR3: 0000000088564000 CR4: 00000000001406f0
[   47.791831] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   47.799076] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   47.806319] Call Trace:
[   47.808905]  integrity_inode_free+0x119/0x300
[   47.813374]  security_inode_free+0x14/0x80
[   47.817585]  __destroy_inode+0x1e8/0x4d0
[   47.821642]  destroy_inode+0x49/0x110
[   47.825415]  iput+0x457/0x8d0
[   47.828496]  ? ext4_mark_dquot_dirty+0x190/0x190
[   47.833227]  ext4_ioctl+0x123c/0x39f0
[   47.837001]  ? avc_ss_reset+0x100/0x100
[   47.840949]  ? ext4_ioctl_check_immutable+0x1c0/0x1c0
[   47.846128]  ? putname+0xcd/0x110
[   47.849556]  ? do_sys_open+0x233/0x3e0
[   47.853417]  ? do_syscall_64+0x1d5/0x640
[   47.857452]  ? entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   47.862803]  ? path_mountpoint+0x960/0x960
[   47.867027]  ? trace_hardirqs_on+0x10/0x10
[   47.871237]  ? debug_check_no_obj_freed+0x27c/0x5fd
[   47.876229]  ? lock_acquire+0x170/0x3f0
[   47.880175]  ? lock_downgrade+0x6e0/0x6e0
[   47.884299]  ? ext4_ioctl_check_immutable+0x1c0/0x1c0
[   47.889480]  do_vfs_ioctl+0x75a/0xfe0
[   47.893270]  ? selinux_parse_skb.constprop.0+0x16c0/0x16c0
[   47.898873]  ? ioctl_preallocate+0x1a0/0x1a0
[   47.903260]  ? rcu_read_lock_sched_held+0x10a/0x130
[   47.908253]  ? kmem_cache_free+0x23a/0x2b0
[   47.912464]  ? putname+0xcd/0x110
[   47.915896]  ? security_file_ioctl+0x76/0xb0
[   47.920277]  ? security_file_ioctl+0x83/0xb0
[   47.924659]  SyS_ioctl+0x7f/0xb0
[   47.928098]  ? do_vfs_ioctl+0xfe0/0xfe0
[   47.932049]  do_syscall_64+0x1d5/0x640
[   47.935974]  entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   47.941146] RIP: 0033:0x4401c9
[   47.944328] RSP: 002b:00007ffcca6acc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   47.952021] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401c9
[   47.959273] RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000003
[   47.966560] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[   47.973822] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a50
[   47.981124] R13: 0000000000401ae0 R14: 0000000000000000 R15: 0000000000000000
[   47.988429] Code: 00 00 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 20 <80> 3c 02 00 0f 85 f2 0e 00 00 49 8d 7c 24 10 4d 8b 74 24 08 48 
[   48.007583] RIP: rb_erase+0x29/0x1890 RSP: ffff88808ee2fa60
[   48.013327] ---[ end trace c710bc0926f983ef ]---
[   48.018092] Kernel panic - not syncing: Fatal exception
[   48.024732] Kernel Offset: disabled
[   48.028344] Rebooting in 86400 seconds..