Oops: general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f]
CPU: 1 UID: 0 PID: 7827 Comm: kbnepd bnep0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:klist_put lib/klist.c:212 [inline]
RIP: 0010:klist_del+0x49/0x110 lib/klist.c:230
Code: f6 49 89 dd 49 c1 ed 03 43 80 7c 25 00 00 74 08 48 89 df e8 69 e4 98 f6 4c 8b 33 49 83 e6 fe 49 8d 7e 58 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 4b e4 98 f6 4d 8b 7e 58 4c 89 f7 e8 7f 4f
RSP: 0018:ffffc9000b1c7828 EFLAGS: 00010202
RAX: 000000000000000b RBX: ffff888069de0060 RCX: ffff888052590000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000058
RBP: ffffc9000b1c7950 R08: ffff88809e5bd3c3 R09: 1ffff11013cb7a78
R10: dffffc0000000000 R11: ffffed1013cb7a79 R12: dffffc0000000000
R13: 1ffff1100d3bc00c R14: 0000000000000000 R15: ffff8880391b4760
FS:  0000000000000000(0000) GS:ffff8881255b0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c40cb5286 CR3: 000000007c696000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 device_del+0x27f/0x8f0 drivers/base/core.c:3855
 unregister_netdevice_many_notify+0x1e0e/0x2370 net/core/dev.c:12438
 unregister_netdevice_many net/core/dev.c:12466 [inline]
 unregister_netdevice_queue net/core/dev.c:12280 [inline]
 unregister_netdevice include/linux/netdevice.h:3408 [inline]
 unregister_netdev+0x15f/0x200 net/core/dev.c:12484
 bnep_session+0x29d1/0x2c00 net/bluetooth/bnep/core.c:525
 kthread+0x388/0x470 kernel/kthread.c:467
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:klist_put lib/klist.c:212 [inline]
RIP: 0010:klist_del+0x49/0x110 lib/klist.c:230
Code: f6 49 89 dd 49 c1 ed 03 43 80 7c 25 00 00 74 08 48 89 df e8 69 e4 98 f6 4c 8b 33 49 83 e6 fe 49 8d 7e 58 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 4b e4 98 f6 4d 8b 7e 58 4c 89 f7 e8 7f 4f
RSP: 0018:ffffc9000b1c7828 EFLAGS: 00010202
RAX: 000000000000000b RBX: ffff888069de0060 RCX: ffff888052590000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000058
RBP: ffffc9000b1c7950 R08: ffff88809e5bd3c3 R09: 1ffff11013cb7a78
R10: dffffc0000000000 R11: ffffed1013cb7a79 R12: dffffc0000000000
R13: 1ffff1100d3bc00c R14: 0000000000000000 R15: ffff8880391b4760
FS:  0000000000000000(0000) GS:ffff8881255b0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c40cb5286 CR3: 000000000e54a000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	f6 49 89 dd          	testb  $0xdd,-0x77(%rcx)
   4:	49 c1 ed 03          	shr    $0x3,%r13
   8:	43 80 7c 25 00 00    	cmpb   $0x0,0x0(%r13,%r12,1)
   e:	74 08                	je     0x18
  10:	48 89 df             	mov    %rbx,%rdi
  13:	e8 69 e4 98 f6       	call   0xf698e481
  18:	4c 8b 33             	mov    (%rbx),%r14
  1b:	49 83 e6 fe          	and    $0xfffffffffffffffe,%r14
  1f:	49 8d 7e 58          	lea    0x58(%r14),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 05                	je     0x36
  31:	e8 4b e4 98 f6       	call   0xf698e481
  36:	4d 8b 7e 58          	mov    0x58(%r14),%r15
  3a:	4c 89 f7             	mov    %r14,%rdi
  3d:	e8                   	.byte 0xe8
  3e:	7f 4f                	jg     0x8f