usb 9-1: dvb_frontend_open:
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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.8.1907/13375
WARNING: kernel/locking/mutex.c:625 at __mutex_lock+0x93f/0x1c10 kernel/locking/mutex.c:821, CPU#1: syz.8.1907/13375
Modules linked in:
CPU: 1 UID: 0 PID: 13375 Comm: syz.8.1907 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline]
RIP: 0010:__mutex_lock+0x946/0x1c10 kernel/locking/mutex.c:821
Code: 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 75 12 00 00 44 8b 05 3d cc 7a 06 45 85 c0 75 13 48 8d 3d 11 da 7d 06 48 c7 c6 c0 fc 0f 8c <67> 48 0f b9 3a 90 e9 1b f8 ff ff 4d 8d a7 f0 0a 00 00 4c 89 e7 e8
RSP: 0018:ffffc90005b3f6a0 EFLAGS: 00010246
RAX: 0000000000000003 RBX: ffff88802f7ec010 RCX: 1ffffffff24d6828
RDX: 0000000000000000 RSI: ffffffff8c0ffcc0 RDI: ffffffff926e4f20
RBP: ffffc90005b3f810 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff926b4147 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888037fd3320
FS:  00007fed7e3f66c0(0000) GS:ffff888122570000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c422bb4 CR3: 0000000024796000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 as102_stream_ctrl+0x28/0xd0 drivers/media/usb/as102/as102_drv.c:259
 __dvb_frontend_open+0x122/0xf80 drivers/media/dvb-core/dvb_frontend.c:2772
 dvb_frontend_open+0x767/0x960 drivers/media/dvb-core/dvb_frontend.c:2884
 dvb_device_open+0x270/0x3b0 drivers/media/dvb-core/dvbdev.c:109
 chrdev_open+0x234/0x6a0 fs/char_dev.c:413
 do_dentry_open+0x674/0x1470 fs/open.c:1000
 vfs_open_consume+0xcc/0x460 fs/open.c:1131
 do_open fs/namei.c:4851 [inline]
 path_openat+0x1547/0x23f0 fs/namei.c:5016
 do_file_open+0x20e/0x430 fs/namei.c:5045
 do_sys_openat2+0x163/0x1d0 fs/open.c:1443
 do_sys_open fs/open.c:1449 [inline]
 __do_sys_openat fs/open.c:1465 [inline]
 __se_sys_openat fs/open.c:1460 [inline]
 __x64_sys_openat+0x12d/0x210 fs/open.c:1460
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x7b0 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fed8016034e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fed7e3f5b28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fed7e3f66c0 RCX: 00007fed8016034e
RDX: 0000000000000802 RSI: 00007fed7e3f5c00 RDI: ffffffffffffff9c
RBP: 00007fed7e3f5c00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007fed80426038 R14: 00007fed80425fa0 R15: 00007ffff3c63318
 </TASK>
----------------
Code disassembly (best guess):
   0:	0f b6 14 11          	movzbl (%rcx,%rdx,1),%edx
   4:	38 d0                	cmp    %dl,%al
   6:	7c 08                	jl     0x10
   8:	84 d2                	test   %dl,%dl
   a:	0f 85 75 12 00 00    	jne    0x1285
  10:	44 8b 05 3d cc 7a 06 	mov    0x67acc3d(%rip),%r8d        # 0x67acc54
  17:	45 85 c0             	test   %r8d,%r8d
  1a:	75 13                	jne    0x2f
  1c:	48 8d 3d 11 da 7d 06 	lea    0x67dda11(%rip),%rdi        # 0x67dda34
  23:	48 c7 c6 c0 fc 0f 8c 	mov    $0xffffffff8c0ffcc0,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	90                   	nop
  30:	e9 1b f8 ff ff       	jmp    0xfffff850
  35:	4d 8d a7 f0 0a 00 00 	lea    0xaf0(%r15),%r12
  3c:	4c 89 e7             	mov    %r12,%rdi
  3f:	e8                   	.byte 0xe8