------------[ 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#1: syz.0.2787/17591
WARNING: kernel/locking/mutex.c:593 at __mutex_lock+0x93d/0x1b90 kernel/locking/mutex.c:776, CPU#1: syz.0.2787/17591
Modules linked in:
CPU: 1 UID: 0 PID: 17591 Comm: syz.0.2787 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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+0x944/0x1b90 kernel/locking/mutex.c:776
Code: c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 77 10 00 00 8b 35 5e 41 47 05 85 f6 75 13 48 8d 3d d3 5d 4a 05 48 c7 c6 a0 b1 af 8b <67> 48 0f b9 3a 90 e9 20 f8 ff ff 31 c9 31 d2 48 89 df e8 05 63 51
RSP: 0018:ffffc9000f00fa40 EFLAGS: 00010246
RAX: 0000000000000003 RBX: ffff888053e12b60 RCX: 1ffffffff21b3e80
RDX: 0000000000000000 RSI: ffffffff8bafb1a0 RDI: ffffffff90dd1080
RBP: ffffc9000f00fbc0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f085d2116c0(0000) GS:ffff88812443c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2fb0bff8 CR3: 0000000079bd6000 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_dmxdev_pes_filter_set drivers/media/dvb-core/dmxdev.c:978 [inline]
 dvb_demux_do_ioctl+0xe64/0x1200 drivers/media/dvb-core/dmxdev.c:1092
 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+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f085c39c799
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:00007f085d211028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f085c615fa0 RCX: 00007f085c39c799
RDX: 0000200000000200 RSI: 00000000403c6f2b RDI: 0000000000000006
RBP: 00007f085c432c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f085c616038 R14: 00007f085c615fa0 R15: 00007ffe6e8be278
 </TASK>
----------------
Code disassembly (best guess):
   0:	c0 03 0f             	rolb   $0xf,(%rbx)
   3:	b6 14                	mov    $0x14,%dh
   5:	11 38                	adc    %edi,(%rax)
   7:	d0 7c 08 84          	sarb   $1,-0x7c(%rax,%rcx,1)
   b:	d2 0f                	rorb   %cl,(%rdi)
   d:	85 77 10             	test   %esi,0x10(%rdi)
  10:	00 00                	add    %al,(%rax)
  12:	8b 35 5e 41 47 05    	mov    0x547415e(%rip),%esi        # 0x5474176
  18:	85 f6                	test   %esi,%esi
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d d3 5d 4a 05 	lea    0x54a5dd3(%rip),%rdi        # 0x54a5df6
  23:	48 c7 c6 a0 b1 af 8b 	mov    $0xffffffff8bafb1a0,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	90                   	nop
  30:	e9 20 f8 ff ff       	jmp    0xfffff855
  35:	31 c9                	xor    %ecx,%ecx
  37:	31 d2                	xor    %edx,%edx
  39:	48 89 df             	mov    %rbx,%rdi
  3c:	e8                   	.byte 0xe8
  3d:	05                   	.byte 0x5
  3e:	63                   	.byte 0x63
  3f:	51                   	push   %rcx