Re: [syzbot] WARNING in fw_load_sysfs_fallback

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit:    52e44129 Merge branch 'for-5.12-fixes' of git://git.kernel..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17f1d196d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f91155ccddaf919c
dashboard link: https://syzkaller.appspot.com/bug?extid=b064fbd5fc8b2cfae49d
compiler:       Debian clang version 11.0.1-2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12a536a6d00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11339dd9d00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b064fbd5fc8b2cfae49d@xxxxxxxxxxxxxxxxxxxxxxxxx

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sysfs group 'power' not found for kobject 'ueagle-atm!adi930.fw'
WARNING: CPU: 0 PID: 5 at fs/sysfs/group.c:281 sysfs_remove_group+0x16e/0x280 fs/sysfs/group.c:279
Modules linked in:
CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events request_firmware_work_func
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 37 92 cb ff 49 8b 14 24 48 c7 c7 40 1a c2 89 4c 89 f6 31 c0 e8 b2 87 56 ff <0f> 0b 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 40 a3 87 ff 49 8d 5e 20
RSP: 0018:ffffc90000ca7a90 EFLAGS: 00010246
RAX: f97192423f200500 RBX: ffff8880351a4038 RCX: ffff888011528000
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 1ffffffff1459c30 R08: ffffffff8160b932 R09: ffffed1017385fe8
R10: ffffed1017385fe8 R11: 0000000000000000 R12: ffff8880351a4008
R13: dffffc0000000000 R14: ffffffff8a2ce140 R15: ffff888035bbc3a0
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcb4541b47 CR3: 000000001d137000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 device_del+0x26a/0xa90 drivers/base/core.c:3398
 fw_load_sysfs_fallback+0x53e/0x720 drivers/base/firmware_loader/fallback.c:543
 fw_load_from_user_helper+0x242/0x320 drivers/base/firmware_loader/fallback.c:581
 _request_firmware+0x2c5/0x4c0 drivers/base/firmware_loader/main.c:831
 request_firmware_work_func+0xb8/0x1e0 drivers/base/firmware_loader/main.c:1077
 process_one_work+0x789/0xfd0 kernel/workqueue.c:2275
 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421
 kthread+0x39a/0x3c0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294