list_del corruption, ffff8880886c8488->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:45!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6493 Comm: kworker/u5:2 Not tainted 4.19.137-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: hci0 hci_rx_work
RIP: 0010:__list_del_entry_valid.cold+0x23/0x55 lib/list_debug.c:45
Code: e8 56 27 f4 fd 0f 0b 48 89 ee 48 c7 c7 c0 08 cb 87 e8 45 27 f4 fd 0f 0b 4c 89 ea 48 89 ee 48 c7 c7 00 08 cb 87 e8 31 27 f4 fd <0f> 0b 4c 89 e2 48 89 ee 48 c7 c7 60 08 cb 87 e8 1d 27 f4 fd 0f 0b
RSP: 0018:ffff8880848ef920 EFLAGS: 00010286
RAX: 000000000000004e RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8154cf41 RDI: ffffed101091df16
RBP: ffff8880886c8488 R08: 000000000000004e R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000200
R13: dead000000000100 R14: ffff8880886c8040 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006e06c0 CR3: 0000000008c6d000 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+0x5e/0x1c0 net/bluetooth/l2cap_core.c:493
 l2cap_conless_channel net/bluetooth/l2cap_core.c:6976 [inline]
 l2cap_recv_frame+0xd36/0xa550 net/bluetooth/l2cap_core.c:7023
 l2cap_recv_acldata+0x80e/0x910 net/bluetooth/l2cap_core.c:7588
 hci_acldata_packet net/bluetooth/hci_core.c:4178 [inline]
 hci_rx_work+0x455/0xa90 net/bluetooth/hci_core.c:4364
 process_one_work+0x864/0x1570 kernel/workqueue.c:2155
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2298
 kthread+0x30b/0x410 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Modules linked in:
---[ end trace e7c9d7cbc604b934 ]---
RIP: 0010:__list_del_entry_valid.cold+0x23/0x55 lib/list_debug.c:45
Code: e8 56 27 f4 fd 0f 0b 48 89 ee 48 c7 c7 c0 08 cb 87 e8 45 27 f4 fd 0f 0b 4c 89 ea 48 89 ee 48 c7 c7 00 08 cb 87 e8 31 27 f4 fd <0f> 0b 4c 89 e2 48 89 ee 48 c7 c7 60 08 cb 87 e8 1d 27 f4 fd 0f 0b
RSP: 0018:ffff8880848ef920 EFLAGS: 00010286
RAX: 000000000000004e RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8154cf41 RDI: ffffed101091df16
RBP: ffff8880886c8488 R08: 000000000000004e R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: dead000000000200
R13: dead000000000100 R14: ffff8880886c8040 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000006e06c0 CR3: 0000000008c6d000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400