syzbot

Oops: stack segment: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 16281 Comm: syz.3.11803 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:kernfs_rename_ns+0x3a/0x7a0 fs/kernfs/dir.c:1747
Code: ec 48 48 89 cb 48 89 54 24 10 49 89 f5 49 89 fe 49 bc 00 00 00 00 00 fc ff df e8 11 0a 5e ff 4d 8d 7e 30 4c 89 fd 48 c1 ed 03 <42> 80 7c 25 00 00 74 08 4c 89 ff e8 06 ee c3 ff 49 83 3f 00 0f 84
RSP: 0018:ffffc9000462f9c0 EFLAGS: 00010206
RAX: ffffffff8263404f RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90010867000 RSI: 0000000000000c75 RDI: 0000000000000c76
RBP: 0000000000000006 R08: ffff888023cddb80 R09: 0000000000000008
R10: 0000000000000007 R11: 0000000000000002 R12: dffffc0000000000
R13: ffff88801a149780 R14: 0000000000000000 R15: 0000000000000030
FS:  00007f1dceb9a6c0(0000) GS:ffff8881260b1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f53a0fe3a10 CR3: 000000004f442000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kobject_move+0x525/0x6e0 lib/kobject.c:569
 device_move+0xe0/0x700 drivers/base/core.c:4606
 hci_conn_del_sysfs+0xb8/0x170 net/bluetooth/hci_sysfs.c:75
 hci_conn_cleanup net/bluetooth/hci_conn.c:173 [inline]
 hci_conn_del+0xc36/0x11b0 net/bluetooth/hci_conn.c:1234
 hci_conn_hash_flush+0x191/0x230 net/bluetooth/hci_conn.c:2638
 hci_dev_do_reset net/bluetooth/hci_core.c:566 [inline]
 hci_dev_reset+0x44b/0x6b0 net/bluetooth/hci_core.c:610
 sock_do_ioctl+0xdc/0x300 net/socket.c:1245
 sock_ioctl+0x576/0x790 net/socket.c:1366
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1dcdd8f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1dceb9a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1dcdfe5fa0 RCX: 00007f1dcdd8f749
RDX: 0000000000000000 RSI: 00000000400448cb RDI: 0000000000000005
RBP: 00007f1dcde13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1dcdfe6038 R14: 00007f1dcdfe5fa0 R15: 00007ffd266b09a8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:kernfs_rename_ns+0x3a/0x7a0 fs/kernfs/dir.c:1747
Code: ec 48 48 89 cb 48 89 54 24 10 49 89 f5 49 89 fe 49 bc 00 00 00 00 00 fc ff df e8 11 0a 5e ff 4d 8d 7e 30 4c 89 fd 48 c1 ed 03 <42> 80 7c 25 00 00 74 08 4c 89 ff e8 06 ee c3 ff 49 83 3f 00 0f 84
RSP: 0018:ffffc9000462f9c0 EFLAGS: 00010206
RAX: ffffffff8263404f RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90010867000 RSI: 0000000000000c75 RDI: 0000000000000c76
RBP: 0000000000000006 R08: ffff888023cddb80 R09: 0000000000000008
R10: 0000000000000007 R11: 0000000000000002 R12: dffffc0000000000
R13: ffff88801a149780 R14: 0000000000000000 R15: 0000000000000030
FS:  00007f1dceb9a6c0(0000) GS:ffff8881261b1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1dceb58d58 CR3: 000000004f442000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	ec                   	in     (%dx),%al
   1:	48                   	rex.W
   2:	48 89 cb             	mov    %rcx,%rbx
   5:	48 89 54 24 10       	mov    %rdx,0x10(%rsp)
   a:	49 89 f5             	mov    %rsi,%r13
   d:	49 89 fe             	mov    %rdi,%r14
  10:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
  17:	fc ff df
  1a:	e8 11 0a 5e ff       	call   0xff5e0a30
  1f:	4d 8d 7e 30          	lea    0x30(%r14),%r15
  23:	4c 89 fd             	mov    %r15,%rbp
  26:	48 c1 ed 03          	shr    $0x3,%rbp
* 2a:	42 80 7c 25 00 00    	cmpb   $0x0,0x0(%rbp,%r12,1) <-- trapping instruction
  30:	74 08                	je     0x3a
  32:	4c 89 ff             	mov    %r15,%rdi
  35:	e8 06 ee c3 ff       	call   0xffc3ee40
  3a:	49 83 3f 00          	cmpq   $0x0,(%r15)
  3e:	0f                   	.byte 0xf
  3f:	84                   	.byte 0x84