------------[ 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.0.4462/21568
WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0x132a/0x15a0 kernel/locking/mutex.c:821, CPU#1: syz.0.4462/21568
Modules linked in:
CPU: 1 UID: 0 PID: 21568 Comm: syz.0.4462 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: 05 be 91 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 46 02 00 00 83 3d 23 c8 b8 05 00 75 13 48 8d 3d 76 c7 bb 05 48 c7 c6 80 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: 0000:ffffc9000383f6a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90022ed6000 RSI: ffffffff8c2d2780 RDI: ffffffff91c10550
RBP: ffffc9000383f840 R08: ffffffff91be05f3 R09: 1ffffffff237c0be
R10: dffffc0000000000 R11: fffffbfff237c0bf R12: ffff8880526de010
R13: 0000000000000000 R14: 1ffff92000707ee8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888123514000(0063) knlGS:00000000f54a6b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000003101fff8 CR3: 0000000085e1e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 00000000000f010e 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_compat_sys_openat fs/open.c:1510 [inline]
 __se_compat_sys_openat fs/open.c:1508 [inline]
 __ia32_compat_sys_openat+0x131/0x160 fs/open.c:1508
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
 do_int80_emulation+0x198/0x500 arch/x86/entry/syscall_32.c:166
 asm_int80_emulation+0x1a/0x20 arch/x86/include/asm/idtentry.h:598
RIP: 0023:0xf71e77ab
Code: 57 56 53 8b 44 24 14 f6 00 08 75 23 8b 44 24 18 8b 5c 24 1c 8b 4c 24 20 8b 54 24 24 8b 74 24 28 8b 7c 24 2c 8b 6c 24 30 cd 80 <5b> 5e 5f 5d c3 5b 5e 5f 5d e9 f7 a1 ff ff 66 90 66 90 66 90 90 53
RSP: 002b:00000000f54a603c EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000f54a6100
RDX: 0000000000000802 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	05 be 91 48 c1       	add    $0xc14891be,%eax
   5:	e8 03 0f b6 04       	call   0x4b60f0d
   a:	18 84 c0 0f 85 46 02 	sbb    %al,0x246850f(%rax,%rax,8)
  11:	00 00                	add    %al,(%rax)
  13:	83 3d 23 c8 b8 05 00 	cmpl   $0x0,0x5b8c823(%rip)        # 0x5b8c83d
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d 76 c7 bb 05 	lea    0x5bbc776(%rip),%rdi        # 0x5bbc799
  23:	48 c7 c6 80 27 2d 8c 	mov    $0xffffffff8c2d2780,%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