list_del corruption, ffff888096d6ae68->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:45!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 6374 Comm: kworker/u5:1 Not tainted 4.14.192-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci0 hci_rx_work
task: ffff888097c462c0 task.stack: ffff888086f38000
RIP: 0010:__list_del_entry_valid.cold+0x23/0x55 lib/list_debug.c:45
RSP: 0018:ffff888086f3f9b8 EFLAGS: 00010282
RAX: 000000000000004e RBX: ffff88809732e0c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff86ac0dc0 RDI: ffffed1010de7f2d
RBP: ffff888096d6ae68 R08: 000000000000004e R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dead000000000200
R13: dead000000000100 R14: ffff888096d6aa00 R15: ffff888093da1e40
FS:  0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006e06c0 CR3: 00000000a0674000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 l2cap_chan_destroy net/bluetooth/l2cap_core.c:476 [inline]
 kref_put include/linux/kref.h:70 [inline]
 l2cap_chan_put+0x50/0x1b0 net/bluetooth/l2cap_core.c:493
 l2cap_conless_channel net/bluetooth/l2cap_core.c:6976 [inline]
 l2cap_recv_frame+0xb9a/0x95c0 net/bluetooth/l2cap_core.c:7023
 l2cap_recv_acldata+0x7a6/0x8b0 net/bluetooth/l2cap_core.c:7588
 hci_acldata_packet net/bluetooth/hci_core.c:4066 [inline]
 hci_rx_work+0x3d1/0x970 net/bluetooth/hci_core.c:4249
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
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 
RIP: __list_del_entry_valid.cold+0x23/0x55 lib/list_debug.c:45 RSP: ffff888086f3f9b8
---[ end trace 0c4ee31d14270a5b ]---