dvb-usb: no frontend was attached by 'AVerMedia AVerTVHD Volar (A868R)'
dvb-usb: bulk message failed: -22 (1/0)
dvb-usb: AVerMedia AVerTVHD Volar (A868R) successfully initialized and connected.
usb 4-1: USB disconnect, device number 71
general protection fault, probably for non-canonical address 0xdffffc0000000013: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000098-0x000000000000009f]
CPU: 1 PID: 4119 Comm: kworker/1:4 Not tainted 5.18.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
RIP: 0010:media_gobj_destroy drivers/media/mc/mc-entity.c:166 [inline]
RIP: 0010:media_gobj_destroy+0x7f/0x240 drivers/media/mc/mc-entity.c:158
Code: df 48 c1 ea 03 80 3c 02 00 0f 85 79 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 2b 48 8d bd a0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4a 01 00 00 48 83 85 a0 00 00 00 01 4c 8d 6b 10
RSP: 0018:ffffc90001a7f4c0 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: ffff888237cd9d51 RCX: ffffc90017800000
RDX: 0000000000000013 RSI: ffffffff842287c9 RDI: 000000000000009f
RBP: ffffffffffffffff R08: ffffffff86c2fa00 R09: ffffffff842226e6
R10: 0000000000000004 R11: 00000000000000ff R12: ffffed10228ec869
R13: ffff888114764338 R14: ffff888114764300 R15: ffff888108a31118
FS:  0000000000000000(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fea726a12e0 CR3: 0000000137c7d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __media_device_unregister_entity+0x200/0x300 drivers/media/mc/mc-device.c:601
 media_device_unregister_entity+0x49/0x70 drivers/media/mc/mc-device.c:689
 dvb_media_device_free+0x1d5/0x680 drivers/media/dvb-core/dvbdev.c:216
 dvb_remove_device.part.0+0x9c/0x260 drivers/media/dvb-core/dvbdev.c:558
 dvb_remove_device drivers/media/dvb-core/dvbdev.c:551 [inline]
 dvb_unregister_device+0x1b/0x60 drivers/media/dvb-core/dvbdev.c:580
 dvb_dmxdev_release+0x1a0/0x630 drivers/media/dvb-core/dmxdev.c:1461
 dvb_usb_adapter_dvb_exit+0x93/0x230 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:224
 dvb_usb_adapter_exit drivers/media/usb/dvb-usb/dvb-usb-init.c:126 [inline]
 dvb_usb_exit drivers/media/usb/dvb-usb/dvb-usb-init.c:141 [inline]
 dvb_usb_device_exit+0x20a/0x510 drivers/media/usb/dvb-usb/dvb-usb-init.c:336
 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:531 [inline]
 device_remove+0x11f/0x170 drivers/base/dd.c:523
 __device_release_driver drivers/base/dd.c:1199 [inline]
 device_release_driver_internal+0x4a3/0x680 drivers/base/dd.c:1222
 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529
 device_del+0x4f3/0xc80 drivers/base/core.c:3592
 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419
 usb_disconnect.cold+0x278/0x6ec drivers/usb/core/hub.c:2228
 hub_port_connect drivers/usb/core/hub.c:5207 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5507 [inline]
 port_event drivers/usb/core/hub.c:5665 [inline]
 hub_event+0x1e74/0x4680 drivers/usb/core/hub.c:5747
 process_one_work+0x996/0x1610 kernel/workqueue.c:2289
 process_scheduled_works kernel/workqueue.c:2352 [inline]
 worker_thread+0x854/0x1080 kernel/workqueue.c:2438
 kthread+0x2ef/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:media_gobj_destroy drivers/media/mc/mc-entity.c:166 [inline]
RIP: 0010:media_gobj_destroy+0x7f/0x240 drivers/media/mc/mc-entity.c:158
Code: df 48 c1 ea 03 80 3c 02 00 0f 85 79 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 2b 48 8d bd a0 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 4a 01 00 00 48 83 85 a0 00 00 00 01 4c 8d 6b 10
RSP: 0018:ffffc90001a7f4c0 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: ffff888237cd9d51 RCX: ffffc90017800000
RDX: 0000000000000013 RSI: ffffffff842287c9 RDI: 000000000000009f
RBP: ffffffffffffffff R08: ffffffff86c2fa00 R09: ffffffff842226e6
R10: 0000000000000004 R11: 00000000000000ff R12: ffffed10228ec869
R13: ffff888114764338 R14: ffff888114764300 R15: ffff888108a31118
FS:  0000000000000000(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fea726a12e0 CR3: 0000000137c7d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   8:	0f 85 79 01 00 00    	jne    0x187
   e:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  15:	fc ff df
  18:	48 8b 2b             	mov    (%rbx),%rbp
  1b:	48 8d bd a0 00 00 00 	lea    0xa0(%rbp),%rdi
  22:	48 89 fa             	mov    %rdi,%rdx
  25:	48 c1 ea 03          	shr    $0x3,%rdx
* 29:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2d:	0f 85 4a 01 00 00    	jne    0x17d
  33:	48 83 85 a0 00 00 00 	addq   $0x1,0xa0(%rbp)
  3a:	01
  3b:	4c 8d 6b 10          	lea    0x10(%rbx),%r13