pvrusb2: You need to resolve the failing condition before this driver can function.  There should be some earlier messages giving more information about the problem.
------------[ cut here ]------------
sysfs group 'power' not found for kobject '1-0044'
WARNING: CPU: 1 PID: 3974 at fs/sysfs/group.c:281 sysfs_remove_group+0x16e/0x280 fs/sysfs/group.c:279
Modules linked in:
CPU: 0 PID: 3974 Comm: pvrusb2-context Not tainted 5.13.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:sysfs_remove_group+0x16e/0x280 fs/sysfs/group.c:279
Code: 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 c7 f0 c7 ff 49 8b 14 24 48 c7 c7 40 8c 42 8a 4c 89 f6 31 c0 e8 c2 2e 4c ff <0f> 0b 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 90 e8 7f ff 49 8d 5e 20
RSP: 0018:ffffc90003b57a68 EFLAGS: 00010246
RAX: fb922971a1a37b00 RBX: ffff888021938050 RCX: ffff8880233654c0
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffffffff155cfb8 R08: ffffffff81655632 R09: ffffed1017365f90
R10: ffffed1017365f90 R11: 0000000000000000 R12: ffff888021938020
R13: dffffc0000000000 R14: ffffffff8aae7d80 R15: ffff8881445b8658
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe1caa16000 CR3: 000000002197e000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 device_del+0x2ed/0xc10 drivers/base/core.c:3485
 device_unregister+0x1a/0xc0 drivers/base/core.c:3541
 __unregister_client+0x6d/0x90 drivers/i2c/i2c-core-base.c:1637
 device_for_each_child+0xeb/0x160 drivers/base/core.c:3641
 i2c_del_adapter+0x216/0x690 drivers/i2c/i2c-core-base.c:1700
 pvr2_i2c_core_done+0x55/0xb0 drivers/media/usb/pvrusb2/pvrusb2-i2c-core.c:652
 pvr2_hdw_destroy+0x150/0x2b0 drivers/media/usb/pvrusb2/pvrusb2-hdw.c:2679
 pvr2_context_destroy+0x7a/0x3c0 drivers/media/usb/pvrusb2/pvrusb2-context.c:70
 pvr2_context_check drivers/media/usb/pvrusb2/pvrusb2-context.c:137 [inline]
 pvr2_context_thread_func+0x41d/0xb30 drivers/media/usb/pvrusb2/pvrusb2-context.c:158
 kthread+0x39a/0x3c0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294