------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: kernel/locking/mutex.c:593 at __mutex_lock_common kernel/locking/mutex.c:593 [inline], CPU#0: syz.3.20/6633
WARNING: kernel/locking/mutex.c:593 at __mutex_lock+0x1221/0x1480 kernel/locking/mutex.c:776, CPU#0: syz.3.20/6633
Modules linked in:
CPU: 0 UID: 0 PID: 6633 Comm: syz.3.20 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:593 [inline]
RIP: 0010:__mutex_lock+0x1228/0x1480 kernel/locking/mutex.c:776
Code: e8 03 42 0f b6 04 28 84 c0 0f 85 33 02 00 00 83 3d 50 e8 4a 04 00 0f 85 4b ef ff ff 48 8d 3d ff f2 4d 04 48 c7 c6 40 1d 8b 8b <67> 48 0f b9 3a e9 33 ef ff ff 0f 0b e9 f8 f1 ff ff 0f 0b e9 45 f2
RSP: 0018:ffffc90003577a20 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff920006aef5c RCX: ffff888021ff3d00
RDX: 0000000000000000 RSI: ffffffff8b8b1d40 RDI: ffffffff8fc41e80
RBP: ffffc90003577bd8 R08: ffffffff8fc113c3 R09: 1ffffffff1f82278
R10: dffffc0000000000 R11: fffffbfff1f82279 R12: ffff888034166b60
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f66479a16c0(0000) GS:ffff888125a0d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000007a5a8000 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+0x518/0x6c0 drivers/media/dvb-core/dvb_demux.c:977
 dvb_dmxdev_filter_start+0xcf4/0x10e0 drivers/media/dvb-core/dmxdev.c:760
 dvb_demux_do_ioctl+0x470/0x540 drivers/media/dvb-core/dmxdev.c:1083
 dvb_usercopy+0x1a6/0x2e0 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+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe8/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f6646b9c799
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:00007f66479a1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6646e15fa0 RCX: 00007f6646b9c799
RDX: 0000200000000000 RSI: 00000000403c6f2b RDI: 0000000000000004
RBP: 00007f6646c32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6646e16038 R14: 00007f6646e15fa0 R15: 00007ffeec2fbca8
 </TASK>
----------------
Code disassembly (best guess):
   0:	e8 03 42 0f b6       	call   0xb60f4208
   5:	04 28                	add    $0x28,%al
   7:	84 c0                	test   %al,%al
   9:	0f 85 33 02 00 00    	jne    0x242
   f:	83 3d 50 e8 4a 04 00 	cmpl   $0x0,0x44ae850(%rip)        # 0x44ae866
  16:	0f 85 4b ef ff ff    	jne    0xffffef67
  1c:	48 8d 3d ff f2 4d 04 	lea    0x44df2ff(%rip),%rdi        # 0x44df322
  23:	48 c7 c6 40 1d 8b 8b 	mov    $0xffffffff8b8b1d40,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 33 ef ff ff       	jmp    0xffffef67
  34:	0f 0b                	ud2
  36:	e9 f8 f1 ff ff       	jmp    0xfffff233
  3b:	0f 0b                	ud2
  3d:	e9                   	.byte 0xe9
  3e:	45                   	rex.RB
  3f:	f2                   	repnz