Oops: general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f]
CPU: 0 UID: 0 PID: 11643 Comm: kbnepd bnep0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
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 de e8 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 de e8 f6 4d 8b 7e 58 4c 89 f7 e8 3f f8
RSP: 0018:ffffc90003d7f748 EFLAGS: 00010202
RAX: 000000000000000b RBX: ffff8880288d7860 RCX: ffff8880300d1e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000058
RBP: ffffc90003d7f870 R08: ffff8880336222d3 R09: 1ffff110066c445a
R10: dffffc0000000000 R11: ffffed10066c445b R12: dffffc0000000000
R13: 1ffff1100511af0c R14: 0000000000000000 R15: ffff88807624c758
FS:  0000000000000000(0000) GS:ffff88812613e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f89869d5d58 CR3: 00000000795ec000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 device_del+0x280/0x8e0 drivers/base/core.c:3855
 unregister_netdevice_many_notify+0x1df2/0x2390 net/core/dev.c:12369
 unregister_netdevice_many net/core/dev.c:12397 [inline]
 unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12211
 unregister_netdevice include/linux/netdevice.h:3390 [inline]
 unregister_netdev+0x1f/0x60 net/core/dev.c:12415
 bnep_session+0x294d/0x2b40 net/bluetooth/bnep/core.c:525
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 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 de e8 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 de e8 f6 4d 8b 7e 58 4c 89 f7 e8 3f f8
RSP: 0018:ffffc90003d7f748 EFLAGS: 00010202
RAX: 000000000000000b RBX: ffff8880288d7860 RCX: ffff8880300d1e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000058
RBP: ffffc90003d7f870 R08: ffff8880336222d3 R09: 1ffff110066c445a
R10: dffffc0000000000 R11: ffffed10066c445b R12: dffffc0000000000
R13: 1ffff1100511af0c R14: 0000000000000000 R15: ffff88807624c758
FS:  0000000000000000(0000) GS:ffff88812613e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f830bf17d60 CR3: 000000000dd38000 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 de e8 f6       	call   0xf6e8de81
  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 de e8 f6       	call   0xf6e8de81
  36:	4d 8b 7e 58          	mov    0x58(%r14),%r15
  3a:	4c 89 f7             	mov    %r14,%rdi
  3d:	e8                   	.byte 0xe8
  3e:	3f                   	(bad)
  3f:	f8                   	clc