------------[ 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.0.42/6064
WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0x12e2/0x1550 kernel/locking/mutex.c:821, CPU#1: syz.0.42/6064
Modules linked in:
CPU: 1 UID: 0 PID: 6064 Comm: syz.0.42 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline]
RIP: 0010:__mutex_lock+0x12e9/0x1550 kernel/locking/mutex.c:821
Code: 95 7a 90 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 47 02 00 00 83 3d eb 23 92 04 00 75 13 48 8d 3d 6e 20 95 04 48 c7 c6 20 12 0d 8c <67> 48 0f b9 3a 90 e9 6b ee ff ff 90 0f 0b 90 e9 3e f2 ff ff 90 0f
RSP: 0018:ffffc9000437f8a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88807fb48000
RDX: 0000000000000000 RSI: ffffffff8c0d1220 RDI: ffffffff907d9210
RBP: ffffc9000437fa40 R08: ffffffff907a9583 R09: 1ffffffff20f52b0
R10: dffffc0000000000 R11: fffffbfff20f52b1 R12: ffff888036f36b30
R13: 0000000000000000 R14: 1ffff9200086ff28 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124dc7000(0063) knlGS:0000000056a92480
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000034363fff CR3: 0000000070d44000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 as102_dvb_dmx_start_feed+0x70/0x290 drivers/media/usb/as102/as102_drv.c:139
 dmx_section_feed_start_filtering+0x519/0x6b0 drivers/media/dvb-core/dvb_demux.c:977
 dvb_dmxdev_filter_start+0xcdb/0x10d0 drivers/media/dvb-core/dmxdev.c:760
 dvb_demux_do_ioctl+0x470/0x540 drivers/media/dvb-core/dmxdev.c:1090
 dvb_usercopy+0x199/0x2e0 drivers/media/dvb-core/dvbdev.c:996
 dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1208
 __do_compat_sys_ioctl fs/ioctl.c:695 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:638 [inline]
 __ia32_compat_sys_ioctl+0x5ea/0x950 fs/ioctl.c:638
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
 __do_fast_syscall_32+0x27a/0x6a0 arch/x86/entry/syscall_32.c:291
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f980ec
Code: 90 85 d2 74 0a 89 ce 81 e6 ff 0f 00 00 89 32 85 c0 74 05 c1 e9 0c 89 08 31 c0 5e 5d c3 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 58 b8
RSP: 002b:00000000ff89828c EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000403c6f2b
RDX: 0000000080000080 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:	95                   	xchg   %eax,%ebp
   1:	7a 90                	jp     0xffffff93
   3:	48 c1 e8 03          	shr    $0x3,%rax
   7:	0f b6 04 18          	movzbl (%rax,%rbx,1),%eax
   b:	84 c0                	test   %al,%al
   d:	0f 85 47 02 00 00    	jne    0x25a
  13:	83 3d eb 23 92 04 00 	cmpl   $0x0,0x49223eb(%rip)        # 0x4922405
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d 6e 20 95 04 	lea    0x495206e(%rip),%rdi        # 0x4952091
  23:	48 c7 c6 20 12 0d 8c 	mov    $0xffffffff8c0d1220,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	90                   	nop
  30:	e9 6b ee ff ff       	jmp    0xffffeea0
  35:	90                   	nop
  36:	0f 0b                	ud2
  38:	90                   	nop
  39:	e9 3e f2 ff ff       	jmp    0xfffff27c
  3e:	90                   	nop
  3f:	0f                   	.byte 0xf