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 'i2c-1'
WARNING: CPU: 1 PID: 3984 at fs/sysfs/group.c:279 sysfs_remove_group+0x126/0x170 fs/sysfs/group.c:279
Modules linked in:
CPU: 1 PID: 3984 Comm: pvrusb2-context Not tainted 5.13.0-rc2-next-20210518-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 20 ce 9c 89 e8 c5 e2 e8 06 <0f> 0b eb 98 e8 11 59 c8 ff e9 01 ff ff ff 48 89 df e8 04 59 c8 ff
RSP: 0018:ffffc90002f5fa38 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffffffff89fb8460 RCX: 0000000000000000
RDX: ffff888022241c80 RSI: ffffffff815dbea5 RDI: fffff520005ebf39
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815d5cee R11: 0000000000000000 R12: ffff88801d9f6018
R13: ffffffff89fb8a00 R14: ffffffff8d23cb00 R15: ffffffff8d23c980
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdd7e785718 CR3: 00000000279f9000 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/0xd40 drivers/base/core.c:3485
 cdev_device_del+0x19/0x100 fs/char_dev.c:573
 put_i2c_dev+0x160/0x1b0 drivers/i2c/i2c-dev.c:93
 i2cdev_detach_adapter.part.0+0x10f/0x1a0 drivers/i2c/i2c-dev.c:694
 i2cdev_detach_adapter drivers/i2c/i2c-dev.c:652 [inline]
 i2cdev_notifier_call+0xad/0xc0 drivers/i2c/i2c-dev.c:709
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 blocking_notifier_call_chain kernel/notifier.c:337 [inline]
 blocking_notifier_call_chain+0x67/0x90 kernel/notifier.c:325
 device_del+0x1ff/0xd40 drivers/base/core.c:3482
 device_unregister+0x1f/0xc0 drivers/base/core.c:3541
 i2c_del_adapter+0x4d0/0x670 drivers/i2c/i2c-core-base.c:1723
 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+0x3b1/0x4a0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294