pvrusb2: ***WARNING*** pvrusb2 driver initialization failed due to the failure of one or more sub-device kernel modules.
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: 3950 at fs/sysfs/group.c:281 sysfs_remove_group+0x16e/0x280 fs/sysfs/group.c:279
Modules linked in:
CPU: 1 PID: 3950 Comm: pvrusb2-context Not tainted 5.12.0-rc6-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 27 8f cb ff 49 8b 14 24 48 c7 c7 00 1a c2 89 4c 89 f6 31 c0 e8 d2 8c 56 ff <0f> 0b 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 40 a8 87 ff 49 8d 5e 20
RSP: 0018:ffffc9000343fb20 EFLAGS: 00010246
RAX: 701a1f6d62eec800 RBX: ffff888071efc048 RCX: ffff88801d8db880
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffffffff1459c10 R08: ffffffff8160b612 R09: ffffed10173a5fe8
R10: ffffed10173a5fe8 R11: 0000000000000000 R12: ffff888071efc018
R13: dffffc0000000000 R14: ffffffff8a2ce040 R15: ffff88801bf1eae0
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f413280e000 CR3: 0000000027307000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 device_del+0x26a/0xa90 drivers/base/core.c:3398
 cdev_device_del+0x22/0xe0 fs/char_dev.c:573
 put_i2c_dev drivers/i2c/i2c-dev.c:93 [inline]
 i2cdev_detach_adapter+0x24f/0x2c0 drivers/i2c/i2c-dev.c:689
 i2cdev_notifier_call+0x38/0x60 drivers/i2c/i2c-dev.c:704
 notifier_call_chain kernel/notifier.c:83 [inline]
 blocking_notifier_call_chain+0x108/0x1b0 kernel/notifier.c:337
 device_del+0x25b/0xa90 drivers/base/core.c:3395
 device_unregister+0x1a/0xc0 drivers/base/core.c:3454
 i2c_del_adapter+0x370/0x7f0 drivers/i2c/i2c-core-base.c:1692
 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+0x3dd/0xa90 drivers/media/usb/pvrusb2/pvrusb2-context.c:158
 kthread+0x39a/0x3c0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294