------------[ 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.2.4167/25069
WARNING: kernel/locking/mutex.c:593 at __mutex_lock+0x10a4/0x1300 kernel/locking/mutex.c:776, CPU#0: syz.2.4167/25069
Modules linked in:
CPU: 0 UID: 0 PID: 25069 Comm: syz.2.4167 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+0x10ab/0x1300 kernel/locking/mutex.c:776
Code: 11 90 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 33 02 00 00 83 3d d9 64 61 04 00 75 13 48 8d 3d 1c 7a 64 04 48 c7 c6 c0 e0 cc 8b <67> 48 0f b9 3a 90 e9 ac f0 ff ff 90 0f 0b 90 e9 73 f4 ff ff 90 0f
RSP: 0018:ffffc900060f7880 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 1ffff92000c1ef28 RCX: 0000000000080000
RDX: ffffc9000d6c3000 RSI: ffffffff8bcce0c0 RDI: ffffffff90150f10
RBP: ffffc900060f7a38 R08: ffffffff9011f9c3 R09: 1ffffffff2023f38
R10: dffffc0000000000 R11: fffffbfff2023f39 R12: ffff88803c1fcb60
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888125459000(0063) knlGS:00000000f5456b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000030d1aff8 CR3: 000000003b606000 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+0x199/0x2e0 drivers/media/dvb-core/dvbdev.c:996
 dvb_demux_ioctl+0x29/0x40 drivers/media/dvb-core/dmxdev.c:1201
 __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:83 [inline]
 __do_fast_syscall_32+0x20d/0x640 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f97f6c
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:00000000f545650c EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000403c6f2b
RDX: 0000000080000200 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:	11 90 48 c1 e8 03    	adc    %edx,0x3e8c148(%rax)
   6:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax
   b:	84 c0                	test   %al,%al
   d:	0f 85 33 02 00 00    	jne    0x246
  13:	83 3d d9 64 61 04 00 	cmpl   $0x0,0x46164d9(%rip)        # 0x46164f3
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d 1c 7a 64 04 	lea    0x4647a1c(%rip),%rdi        # 0x4647a3f
  23:	48 c7 c6 c0 e0 cc 8b 	mov    $0xffffffff8bcce0c0,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	90                   	nop
  30:	e9 ac f0 ff ff       	jmp    0xfffff0e1
  35:	90                   	nop
  36:	0f 0b                	ud2
  38:	90                   	nop
  39:	e9 73 f4 ff ff       	jmp    0xfffff4b1
  3e:	90                   	nop
  3f:	0f                   	.byte 0xf