------------[ 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#0: syz.6.2619/15829
WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0x132a/0x15a0 kernel/locking/mutex.c:821, CPU#0: syz.6.2619/15829
Modules linked in:
CPU: 0 UID: 0 PID: 15829 Comm: syz.6.2619 Tainted: G             L       syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline]
RIP: 0010:__mutex_lock+0x1331/0x15a0 kernel/locking/mutex.c:821
Code: c0 7a 91 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 46 02 00 00 83 3d 73 3e 8d 05 00 75 13 48 8d 3d a6 3b 90 05 48 c7 c6 60 21 0d 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:ffffc90004e8f6a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9001fe00000 RSI: ffffffff8c0d2160 RDI: ffffffff917dbe10
RBP: ffffc90004e8f840 R08: ffffffff917ac0d3 R09: 1ffffffff22f581a
R10: dffffc0000000000 R11: fffffbfff22f581b R12: ffff888036e84010
R13: 0000000000000000 R14: 1ffff920009d1ee8 R15: 0000000000000000
FS:  00007fc8e19906c0(0000) GS:ffff888123aa9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdf3a1556c8 CR3: 0000000074710000 CR4: 00000000003526f0
DR0: 00000000ffffffff DR1: 000000000000000a DR2: 4000000000000003
DR3: 0000000000000001 DR6: 00000000ffff0ff0 DR7: 0000000000000400
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:4845 [inline]
 path_openat+0x16fc/0x20f0 fs/namei.c:5010
 do_file_open+0x23e/0x4a0 fs/namei.c:5039
 do_sys_openat2+0x115/0x200 fs/open.c:1442
 do_sys_open fs/open.c:1448 [inline]
 __do_sys_openat fs/open.c:1464 [inline]
 __se_sys_openat fs/open.c:1459 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1459
 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: 0033:0x7fc8e0b5fd8e
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:00007fc8e198fb28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fc8e19906c0 RCX: 00007fc8e0b5fd8e
RDX: 0000000000000802 RSI: 00007fc8e198fc00 RDI: ffffffffffffff9c
RBP: 00007fc8e198fc00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007fc8e0e26038 R14: 00007fc8e0e25fa0 R15: 00007fc8e0f4fa48
 </TASK>
----------------
Code disassembly (best guess):
   0:	c0 7a 91 48          	sarb   $0x48,-0x6f(%rdx)
   4:	c1 e8 03             	shr    $0x3,%eax
   7:	0f b6 04 18          	movzbl (%rax,%rbx,1),%eax
   b:	84 c0                	test   %al,%al
   d:	0f 85 46 02 00 00    	jne    0x259
  13:	83 3d 73 3e 8d 05 00 	cmpl   $0x0,0x58d3e73(%rip)        # 0x58d3e8d
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d a6 3b 90 05 	lea    0x5903ba6(%rip),%rdi        # 0x5903bc9
  23:	48 c7 c6 60 21 0d 8c 	mov    $0xffffffff8c0d2160,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	90                   	nop
  30:	e9 1d ee ff ff       	jmp    0xffffee52
  35:	90                   	nop
  36:	0f 0b                	ud2
  38:	90                   	nop
  39:	e9 f0 f1 ff ff       	jmp    0xfffff22e
  3e:	90                   	nop
  3f:	0f                   	.byte 0xf