[syzbot] WARNING in i2cdev_detach_adapter

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    e77a830c Merge branch 'akpm' (patches from Andrew)
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=119458aed00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=c0a6882014fd3d45
dashboard link: https://syzkaller.appspot.com/bug?extid=8c9d567bbd8a4ed98b55
compiler:       Debian clang version 11.0.1-2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=166354cdd00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17b89bbdd00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8c9d567bbd8a4ed98b55@xxxxxxxxxxxxxxxxxxxxxxxxx

pvrusb2: Attached sub-driver cx25840
pvrusb2: ***WARNING*** pvrusb2 device hardware appears to be jammed and I can't clear it.
pvrusb2: You might need to power cycle the pvrusb2 device in order to recover.
------------[ cut here ]------------
sysfs group 'power' not found for kobject 'i2c-1'
WARNING: CPU: 1 PID: 3952 at fs/sysfs/group.c:281 sysfs_remove_group+0x16e/0x280 fs/sysfs/group.c:279
Modules linked in:
CPU: 1 PID: 3952 Comm: pvrusb2-context Not tainted 5.12.0-rc8-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 57 da c8 ff 49 8b 14 24 48 c7 c7 c0 1b 22 8a 4c 89 f6 31 c0 e8 32 bc 4e ff <0f> 0b 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 a0 59 82 ff 49 8d 5e 20
RSP: 0018:ffffc9000307f988 EFLAGS: 00010246
RAX: b99ebc47a3964000 RBX: ffff88802fb9e048 RCX: ffff88801def9c40
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffffffff1519c68 R08: ffffffff8164f2f2 R09: ffffed10173a3f1c
R10: ffffed10173a3f1c R11: 0000000000000000 R12: ffff88802fb9e018
R13: dffffc0000000000 R14: ffffffff8a8ce300 R15: ffff888013f9b488
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efda09df018 CR3: 0000000025e72000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 device_del+0x2ed/0xc10 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+0x2de/0xc10 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:1693
 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:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294


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