------------[ 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.8.31/6272
WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0x947/0x1bd0 kernel/locking/mutex.c:821, CPU#0: syz.8.31/6272
Modules linked in:
CPU: 0 UID: 0 PID: 6272 Comm: syz.8.31 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline]
RIP: 0010:__mutex_lock+0x94e/0x1bd0 kernel/locking/mutex.c:821
Code: 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 c6 10 00 00 44 8b 35 c5 c9 65 05 45 85 f6 75 13 48 8d 3d a9 27 69 05 48 c7 c6 00 d9 cf 8b <67> 48 0f b9 3a 90 e9 18 f8 ff ff 4d 8d a7 e8 0a 00 00 4c 89 e7 e8
RSP: 0018:ffffc9000204fa50 EFLAGS: 00010246
RAX: 0000000000000003 RBX: ffff88802a16cb30 RCX: 1ffffffff22455b4
RDX: 0000000000000000 RSI: ffffffff8bcfd900 RDI: ffffffff91260b90
RBP: ffffc9000204fbc0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f02ceb916c0(0000) GS:ffff888123ddc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd180d5da08 CR3: 0000000059853000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 as102_dvb_dmx_start_feed+0x7d/0x2e0 drivers/media/usb/as102/as102_drv.c:139
 dmx_section_feed_start_filtering+0x3a8/0x660 drivers/media/dvb-core/dvb_demux.c:977
 dvb_dmxdev_filter_start+0x767/0xdd0 drivers/media/dvb-core/dmxdev.c:760
 dvb_demux_do_ioctl+0x786/0x1200 drivers/media/dvb-core/dmxdev.c:1065
 dvb_usercopy+0x167/0x340 drivers/media/dvb-core/dvbdev.c:996
 dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1201
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f02cdd9df99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f02ceb91028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f02ce025fa0 RCX: 00007f02cdd9df99
RDX: 0000000000000000 RSI: 0000000000006f29 RDI: 0000000000000004
RBP: 00007f02cde34ec4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f02ce026038 R14: 00007f02ce025fa0 R15: 00007ffefaf5b2d8
 </TASK>
----------------
Code disassembly (best guess):
   0:	0f b6 14 11          	movzbl (%rcx,%rdx,1),%edx
   4:	38 d0                	cmp    %dl,%al
   6:	7c 08                	jl     0x10
   8:	84 d2                	test   %dl,%dl
   a:	0f 85 c6 10 00 00    	jne    0x10d6
  10:	44 8b 35 c5 c9 65 05 	mov    0x565c9c5(%rip),%r14d        # 0x565c9dc
  17:	45 85 f6             	test   %r14d,%r14d
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d a9 27 69 05 	lea    0x56927a9(%rip),%rdi        # 0x56927cc
  23:	48 c7 c6 00 d9 cf 8b 	mov    $0xffffffff8bcfd900,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	90                   	nop
  30:	e9 18 f8 ff ff       	jmp    0xfffff84d
  35:	4d 8d a7 e8 0a 00 00 	lea    0xae8(%r15),%r12
  3c:	4c 89 e7             	mov    %r12,%rdi
  3f:	e8                   	.byte 0xe8