------------[ 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.1.1529/9855
WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0x132a/0x15a0 kernel/locking/mutex.c:821, CPU#1: syz.1.1529/9855
Modules linked in:
CPU: 1 UID: 0 PID: 9855 Comm: syz.1.1529 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline]
RIP: 0010:__mutex_lock+0x1331/0x15a0 kernel/locking/mutex.c:821
Code: 85 bd 91 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 46 02 00 00 83 3d 93 c8 b2 05 00 75 13 48 8d 3d c6 c6 b5 05 48 c7 c6 c0 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:ffffc900035d7a60 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90004619000 RSI: ffffffff8c2d27c0 RDI: ffffffff91c08420
RBP: ffffc900035d7c00 R08: ffffffff91bd85e3 R09: 1ffffffff237b0bc
R10: dffffc0000000000 R11: fffffbfff237b0bd R12: ffff88807958ab30
R13: 0000000000000000 R14: 1ffff920006baf60 R15: 0000000000000000
FS:  00007f9c46d1b6c0(0000) GS:ffff8881234f7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3351fff8 CR3: 0000000059268000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 as102_dvb_dmx_start_feed+0x70/0x290 drivers/media/usb/as102/as102_drv.c:139
 dmx_ts_feed_start_filtering+0x129/0x220 drivers/media/dvb-core/dvb_demux.c:747
 dvb_dmxdev_start_feed drivers/media/dvb-core/dmxdev.c:658 [inline]
 dvb_dmxdev_filter_start+0x434/0x10d0 drivers/media/dvb-core/dmxdev.c:769
 dvb_demux_do_ioctl+0x48b/0x540 drivers/media/dvb-core/dmxdev.c:1099
 dvb_usercopy+0x199/0x2e0 drivers/media/dvb-core/dvbdev.c:996
 dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1208
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 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: 0033:0x7f9c45d9e559
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:00007f9c46d1b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9c46025fa0 RCX: 00007f9c45d9e559
RDX: 00002000000001c0 RSI: 0000000040146f2c RDI: 0000000000000004
RBP: 00007f9c45e35ab8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9c46026038 R14: 00007f9c46025fa0 R15: 00007ffe412add28
 </TASK>
----------------
Code disassembly (best guess):
   0:	85 bd 91 48 c1 e8    	test   %edi,-0x173eb76f(%rbp)
   6:	03 0f                	add    (%rdi),%ecx
   8:	b6 04                	mov    $0x4,%dh
   a:	18 84 c0 0f 85 46 02 	sbb    %al,0x246850f(%rax,%rax,8)
  11:	00 00                	add    %al,(%rax)
  13:	83 3d 93 c8 b2 05 00 	cmpl   $0x0,0x5b2c893(%rip)        # 0x5b2c8ad
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d c6 c6 b5 05 	lea    0x5b5c6c6(%rip),%rdi        # 0x5b5c6e9
  23:	48 c7 c6 c0 27 2d 8c 	mov    $0xffffffff8c2d27c0,%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