------------[ 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.8.1208/11361
WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0x132a/0x15a0 kernel/locking/mutex.c:821, CPU#0: syz.8.1208/11361
Modules linked in:
CPU: 0 UID: 0 PID: 11361 Comm: syz.8.1208 Tainted: G             L       syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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+0x1331/0x15a0 kernel/locking/mutex.c:821
Code: 79 bc 91 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 46 02 00 00 83 3d 43 0a b8 05 00 75 13 48 8d 3d 76 08 bb 05 48 c7 c6 e0 26 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:ffffc90004ee7a60 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90005bc9000 RSI: ffffffff8c2d26e0 RDI: ffffffff91bf7820
RBP: ffffc90004ee7c00 R08: ffffffff91bc79e3 R09: 1ffffffff2378f3c
R10: dffffc0000000000 R11: fffffbfff2378f3d R12: ffff88807b4a0b30
R13: 0000000000000000 R14: 1ffff920009dcf60 R15: 0000000000000000
FS:  00007f135c5f66c0(0000) GS:ffff88812341f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c40c6cd CR3: 0000000078d56000 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: 0033:0x7f135e39e1d9
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:00007f135c5f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f135e625fa0 RCX: 00007f135e39e1d9
RDX: 0000200000000280 RSI: 0000000040146f2c RDI: 000000000000000b
RBP: 00007f135e435888 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f135e626038 R14: 00007f135e625fa0 R15: 00007fff131e3e08
 </TASK>
----------------
Code disassembly (best guess):
   0:	79 bc                	jns    0xffffffbe
   2:	91                   	xchg   %eax,%ecx
   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 46 02 00 00    	jne    0x259
  13:	83 3d 43 0a b8 05 00 	cmpl   $0x0,0x5b80a43(%rip)        # 0x5b80a5d
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d 76 08 bb 05 	lea    0x5bb0876(%rip),%rdi        # 0x5bb0899
  23:	48 c7 c6 e0 26 2d 8c 	mov    $0xffffffff8c2d26e0,%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