------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: kernel/locking/mutex.c:625 at __mutex_lock_common kernel/locking/mutex.c:625 [inline], CPU#1: syz.1.648/8381
WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0x132a/0x15a0 kernel/locking/mutex.c:821, CPU#1: syz.1.648/8381
Modules linked in:
CPU: 1 UID: 0 PID: 8381 Comm: syz.1.648 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline]
RIP: 0010:__mutex_lock+0x1331/0x15a0 kernel/locking/mutex.c:821
Code: 27 be 91 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 46 02 00 00 83 3d 23 1a b7 05 00 75 13 48 8d 3d c6 18 ba 05 48 c7 c6 00 27 2d 8c <67> 48 0f b9 3a 90 e9 1d ee ff ff 90 0f 0b 90 e9 f0 f1 ff ff 90 0f
RSP: 0018:ffffc900030676a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9001414f000 RSI: ffffffff8c2d2700 RDI: ffffffff91c126a0
RBP: ffffc90003067840 R08: ffffffff91be27f3 R09: 1ffffffff237c4fe
R10: dffffc0000000000 R11: fffffbfff237c4ff R12: ffff88803287c010
R13: 0000000000000000 R14: 1ffff9200060cee8 R15: 0000000000000000
FS:  00007ff70de8d6c0(0000) GS:ffff88812350c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32323ffc CR3: 000000007f269000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 as102_stream_ctrl+0x27/0xc0 drivers/media/usb/as102/as102_drv.c:259
 __dvb_frontend_open+0x2e9/0xca0 drivers/media/dvb-core/dvb_frontend.c:2772
 dvb_device_open+0x24f/0x340 drivers/media/dvb-core/dvbdev.c:109
 chrdev_open+0x4d9/0x600 fs/char_dev.c:413
 do_dentry_open+0x80e/0x1360 fs/open.c:1000
 vfs_open_consume+0x4a/0x350 fs/open.c:1131
 do_open fs/namei.c:4851 [inline]
 path_openat+0x16fc/0x20f0 fs/namei.c:5016
 do_file_open+0x23e/0x4a0 fs/namei.c:5045
 do_sys_openat2+0x115/0x200 fs/open.c:1443
 do_sys_open fs/open.c:1449 [inline]
 __do_sys_openat fs/open.c:1465 [inline]
 __se_sys_openat fs/open.c:1460 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1460
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff70cf6034e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007ff70de8cb28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff70de8d6c0 RCX: 00007ff70cf6034e
RDX: 0000000000000802 RSI: 00007ff70de8cc00 RDI: ffffffffffffff9c
RBP: 00007ff70de8cc00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007ff70d2263f8 R14: 00007ff70d226360 R15: 00007ffdf9b87dc8
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	be 91 48 c1 e8       	mov    $0xe8c14891,%esi
   5:	03 0f                	add    (%rdi),%ecx
   7:	b6 04                	mov    $0x4,%dh
   9:	18 84 c0 0f 85 46 02 	sbb    %al,0x246850f(%rax,%rax,8)
  10:	00 00                	add    %al,(%rax)
  12:	83 3d 23 1a b7 05 00 	cmpl   $0x0,0x5b71a23(%rip)        # 0x5b71a3c
  19:	75 13                	jne    0x2e
  1b:	48 8d 3d c6 18 ba 05 	lea    0x5ba18c6(%rip),%rdi        # 0x5ba18e8
  22:	48 c7 c6 00 27 2d 8c 	mov    $0xffffffff8c2d2700,%rsi
* 29:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2e:	90                   	nop
  2f:	e9 1d ee ff ff       	jmp    0xffffee51
  34:	90                   	nop
  35:	0f 0b                	ud2
  37:	90                   	nop
  38:	e9 f0 f1 ff ff       	jmp    0xfffff22d
  3d:	90                   	nop
  3e:	0f                   	.byte 0xf