BUG: kernel NULL pointer dereference, address: 000000000000015b
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 800000010dfad067 P4D 800000010dfad067 PUD 104bae067 PMD 0 
Oops: Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 1 UID: 0 PID: 3364 Comm: syz.2.16 Not tainted 6.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:serial_clock_vote drivers/bluetooth/hci_qca.c:301 [inline]
RIP: 0010:qca_close+0x22/0x100 drivers/bluetooth/hci_qca.c:723
Code: 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 54 53 49 89 fe 4c 8b bf b8 01 00 00 0f 1f 44 00 00 49 8b 9e b8 01 00 00 <0f> b6 ab 5b 01 00 00 44 0f b6 a3 5a 01 00 00 48 8b 3d 38 51 68 01
RSP: 0018:ffffc90002cb7d40 EFLAGS: 00010246
RAX: ffffffff82fb8be0 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 001fffffffc00000 RSI: 0000000000000000 RDI: ffff888105340200
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff82387090 R12: ffff888103342830
R13: ffff888103342d48 R14: ffff888105340200 R15: 0000000000000000
FS:  0000555590472500(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000015b CR3: 00000001033c2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hci_uart_tty_close+0xb6/0x120 drivers/bluetooth/hci_ldisc.c:557
 tty_ldisc_close drivers/tty/tty_ldisc.c:455 [inline]
 tty_ldisc_kill+0x66/0xc0 drivers/tty/tty_ldisc.c:613
 tty_ldisc_release+0xc9/0x120 drivers/tty/tty_ldisc.c:781
 tty_release_struct+0x10/0x80 drivers/tty/tty_io.c:1690
 tty_release+0x4ef/0x640 drivers/tty/tty_io.c:1861
 __fput+0x86/0x2a0 fs/file_table.c:450
 task_work_run+0x82/0xb0 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xa3/0x1b0 kernel/entry/common.c:218
 do_syscall_64+0x9a/0x190 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffa7058cda9
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:00007ffc4bddfe08 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000000fc5e RCX: 00007ffa7058cda9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007ffa707a7ba0 R08: 0000000000000001 R09: 00007ffc4bde010f
R10: 00007ffa70400000 R11: 0000000000000246 R12: 000000000000fc91
R13: 00007ffa707a5fa0 R14: 0000000000000032 R15: ffffffffffffffff
 </TASK>
Modules linked in:
CR2: 000000000000015b
---[ end trace 0000000000000000 ]---
RIP: 0010:serial_clock_vote drivers/bluetooth/hci_qca.c:301 [inline]
RIP: 0010:qca_close+0x22/0x100 drivers/bluetooth/hci_qca.c:723
Code: 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 54 53 49 89 fe 4c 8b bf b8 01 00 00 0f 1f 44 00 00 49 8b 9e b8 01 00 00 <0f> b6 ab 5b 01 00 00 44 0f b6 a3 5a 01 00 00 48 8b 3d 38 51 68 01
RSP: 0018:ffffc90002cb7d40 EFLAGS: 00010246
RAX: ffffffff82fb8be0 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 001fffffffc00000 RSI: 0000000000000000 RDI: ffff888105340200
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff82387090 R12: ffff888103342830
R13: ffff888103342d48 R14: ffff888105340200 R15: 0000000000000000
FS:  0000555590472500(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000015b CR3: 00000001033c2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	f3 0f 1e fa          	endbr64
   c:	55                   	push   %rbp
   d:	41 57                	push   %r15
   f:	41 56                	push   %r14
  11:	41 54                	push   %r12
  13:	53                   	push   %rbx
  14:	49 89 fe             	mov    %rdi,%r14
  17:	4c 8b bf b8 01 00 00 	mov    0x1b8(%rdi),%r15
  1e:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  23:	49 8b 9e b8 01 00 00 	mov    0x1b8(%r14),%rbx
* 2a:	0f b6 ab 5b 01 00 00 	movzbl 0x15b(%rbx),%ebp <-- trapping instruction
  31:	44 0f b6 a3 5a 01 00 	movzbl 0x15a(%rbx),%r12d
  38:	00
  39:	48 8b 3d 38 51 68 01 	mov    0x1685138(%rip),%rdi        # 0x1685178