Oops: general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7]
CPU: 3 UID: 0 PID: 53 Comm: kworker/3:1 Not tainted 6.17.0-rc1-syzkaller-00214-g99bade344cfa #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: events l2cap_info_timeout
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
RIP: 0010:do_raw_spin_lock+0x6d/0x2b0 kernel/locking/spinlock_debug.c:115
Code: 98 81 48 8d 54 05 00 c7 02 f1 f1 f1 f1 c7 42 04 04 f3 f3 f3 65 48 8b 15 d9 2d 3e 12 48 89 54 24 60 31 d2 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e4
RSP: 0018:ffffc90000a6fa00 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: 00000000000001c0 RCX: 0000000000000000
RDX: 0000000000000038 RSI: 0000000000000000 RDI: 00000000000001c4
RBP: 1ffff9200014df41 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff9b02c290 R12: 00000000000001c0
R13: 0000000000000002 R14: ffff888052da44b0 R15: 0000000000000004
FS:  0000000000000000(0000) GS:ffff8880d69bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000000 CR3: 000000000e380000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 spin_lock_bh include/linux/spinlock.h:356 [inline]
 lock_sock_nested+0x5f/0xf0 net/core/sock.c:3736
 lock_sock include/net/sock.h:1667 [inline]
 l2cap_sock_ready_cb+0x41/0x170 net/bluetooth/l2cap_sock.c:1674
 l2cap_chan_ready net/bluetooth/l2cap_core.c:1246 [inline]
 l2cap_conn_start+0x144/0xb30 net/bluetooth/l2cap_core.c:1512
 l2cap_info_timeout+0x81/0xa0 net/bluetooth/l2cap_core.c:1669
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
RIP: 0010:do_raw_spin_lock+0x6d/0x2b0 kernel/locking/spinlock_debug.c:115
Code: 98 81 48 8d 54 05 00 c7 02 f1 f1 f1 f1 c7 42 04 04 f3 f3 f3 65 48 8b 15 d9 2d 3e 12 48 89 54 24 60 31 d2 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e4
RSP: 0018:ffffc90000a6fa00 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: 00000000000001c0 RCX: 0000000000000000
RDX: 0000000000000038 RSI: 0000000000000000 RDI: 00000000000001c4
RBP: 1ffff9200014df41 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff9b02c290 R12: 00000000000001c0
R13: 0000000000000002 R14: ffff888052da44b0 R15: 0000000000000004
FS:  0000000000000000(0000) GS:ffff8880d69bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000000 CR3: 000000000e380000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	98                   	cwtl
   1:	81 48 8d 54 05 00 c7 	orl    $0xc7000554,-0x73(%rax)
   8:	02 f1                	add    %cl,%dh
   a:	f1                   	int1
   b:	f1                   	int1
   c:	f1                   	int1
   d:	c7 42 04 04 f3 f3 f3 	movl   $0xf3f3f304,0x4(%rdx)
  14:	65 48 8b 15 d9 2d 3e 	mov    %gs:0x123e2dd9(%rip),%rdx        # 0x123e2df5
  1b:	12
  1c:	48 89 54 24 60       	mov    %rdx,0x60(%rsp)
  21:	31 d2                	xor    %edx,%edx
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx <-- trapping instruction
  2e:	48 89 f8             	mov    %rdi,%rax
  31:	83 e0 07             	and    $0x7,%eax
  34:	83 c0 03             	add    $0x3,%eax
  37:	38 d0                	cmp    %dl,%al
  39:	7c 08                	jl     0x43
  3b:	84 d2                	test   %dl,%dl
  3d:	0f                   	.byte 0xf
  3e:	85 e4                	test   %esp,%esp