[  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 '10.128.15.206' (ECDSA) to the list of known hosts.
syzkaller login: [  112.533266] audit: type=1400 audit(1596768090.824:8): avc:  denied  { execmem } for  pid=6362 comm="syz-executor918" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[  112.856007] IPVS: ftp: loaded support on port[0] = 21
executing program
executing program
executing program
[  114.841630] list_del corruption, ffff88809d5ced28->next is LIST_POISON1 (dead000000000100)
[  114.850627] ------------[ cut here ]------------
[  114.855469] kernel BUG at lib/list_debug.c:45!
[  114.860100] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[  114.865456] Modules linked in:
[  114.868635] CPU: 1 PID: 6390 Comm: kworker/u5:2 Not tainted 4.14.192-syzkaller #0
[  114.876226] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  114.885572] Workqueue: hci0 hci_rx_work
[  114.889538] task: ffff88809b500140 task.stack: ffff888097ad0000
[  114.895693] RIP: 0010:__list_del_entry_valid.cold+0x23/0x55
[  114.901389] RSP: 0018:ffff888097ad79b8 EFLAGS: 00010282
[  114.906739] RAX: 000000000000004e RBX: ffff88809737a240 RCX: 0000000000000000
[  114.914003] RDX: 0000000000000000 RSI: ffffffff86ac0dc0 RDI: ffffed1012f5af2d
[  114.921257] RBP: ffff88809d5ced28 R08: 000000000000004e R09: 0000000000000000
[  114.928505] R10: 0000000000000000 R11: 0000000000000000 R12: dead000000000200
[  114.935764] R13: dead000000000100 R14: ffff88809d5ce8c0 R15: ffff8880a08305c0
[  114.943013] FS:  0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
[  114.951213] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  114.957071] CR2: 000055c1a5f55b18 CR3: 0000000099cb8000 CR4: 00000000001406e0
[  114.964330] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  114.971576] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  114.978823] Call Trace:
[  114.981399]  l2cap_chan_put+0x50/0x1b0
[  114.985266]  l2cap_recv_frame+0xb9a/0x95c0
[  114.989502]  ? trace_hardirqs_on+0x10/0x10
[  114.993714]  ? __lock_acquire+0x5fc/0x3f20
[  114.997951]  ? __lock_acquire+0x5fc/0x3f20
[  115.002172]  ? l2cap_ertm_init+0xb70/0xb70
[  115.006390]  ? lock_acquire+0x170/0x3f0
[  115.010351]  ? hci_rx_work+0x278/0x970
[  115.014219]  ? trace_hardirqs_on+0x10/0x10
[  115.018439]  ? hci_rx_work+0x278/0x970
[  115.022389]  ? hci_rx_work+0x3a2/0x970
[  115.026255]  ? lock_downgrade+0x740/0x740
[  115.030379]  ? __ww_mutex_wakeup_for_backoff+0x210/0x210
[  115.035817]  ? __mutex_unlock_slowpath+0x75/0x770
[  115.040648]  l2cap_recv_acldata+0x7a6/0x8b0
[  115.044956]  hci_rx_work+0x3d1/0x970
[  115.048652]  process_one_work+0x793/0x14a0
[  115.052864]  ? work_busy+0x320/0x320
[  115.056574]  ? worker_thread+0x158/0xff0
[  115.060616]  ? _raw_spin_unlock_irq+0x24/0x80
[  115.065111]  worker_thread+0x5cc/0xff0
[  115.068991]  ? rescuer_thread+0xc80/0xc80
[  115.073121]  kthread+0x30d/0x420
[  115.076464]  ? kthread_create_on_node+0xd0/0xd0
[  115.081112]  ret_from_fork+0x24/0x30
[  115.084801] Code: e6 e8 68 b1 44 fe 0f 0b 48 89 ee 48 c7 c7 60 5e e4 86 e8 57 b1 44 fe 0f 0b 4c 89 ea 48 89 ee 48 c7 c7 a0 5d e4 86 e8 43 b1 44 fe <0f> 0b 4c 89 e2 48 89 ee 48 c7 c7 00 5e e4 86 e8 2f b1 44 fe 0f 
[  115.105805] RIP: __list_del_entry_valid.cold+0x23/0x55 RSP: ffff888097ad79b8
[  115.113050] ---[ end trace 4677a478695d41f5 ]---
[  115.117797] Kernel panic - not syncing: Fatal exception
[  115.124789] Kernel Offset: disabled
[  115.128409] Rebooting in 86400 seconds..