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.
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sysfs group 'power' not found for kobject '0-0044'
WARNING: CPU: 1 PID: 2372 at fs/sysfs/group.c:279 sysfs_remove_group+0x126/0x170 fs/sysfs/group.c:279
Modules linked in:
CPU: 1 PID: 2372 Comm: pvrusb2-context Not tainted 5.10.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:sysfs_remove_group+0x126/0x170 fs/sysfs/group.c:279
Code: 48 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 37 48 8b 33 48 c7 c7 a0 59 f2 85 e8 65 b8 e0 03 <0f> 0b eb 98 e8 d1 69 d6 ff e9 01 ff ff ff 48 89 df e8 c4 69 d6 ff
RSP: 0018:ffffc900060f7b80 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffffffff861bdb60 RCX: 0000000000000000
RDX: ffff888109806500 RSI: ffffffff8128f483 RDI: fffff52000c1ef62
RBP: 0000000000000000 R08: 0000000000000001 R09: ffff8881f6b2f5cf
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881038e7020
R13: ffffffff861be100 R14: 1ffff92000c1ef98 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f6b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ae02c809b8 CR3: 0000000108f4e000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 dpm_sysfs_remove+0x97/0xb0 drivers/base/power/sysfs.c:837
 device_del+0x20c/0xec0 drivers/base/core.c:3092
 device_unregister+0x22/0xc0 drivers/base/core.c:3148
 i2c_unregister_device include/linux/err.h:41 [inline]
 __unregister_client drivers/i2c/i2c-core-base.c:1604 [inline]
 __unregister_client+0x95/0xa0 drivers/i2c/i2c-core-base.c:1600
 device_for_each_child+0xf9/0x170 drivers/base/core.c:3248
 i2c_del_adapter+0x37b/0x680 drivers/i2c/i2c-core-base.c:1667
 pvr2_i2c_core_done+0x69/0xc0 drivers/media/usb/pvrusb2/pvrusb2-i2c-core.c:652
 pvr2_hdw_destroy+0x179/0x3b0 drivers/media/usb/pvrusb2/pvrusb2-hdw.c:2679
 pvr2_context_destroy+0x84/0x230 drivers/media/usb/pvrusb2/pvrusb2-context.c:70
 pvr2_context_check drivers/media/usb/pvrusb2/pvrusb2-context.c:137 [inline]
 pvr2_context_thread_func+0x64b/0x850 drivers/media/usb/pvrusb2/pvrusb2-context.c:158
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296