linux-kernel - [syzbot] WARNING in dpm_sysfs

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Message-ID: <0000000000002ed23205ceb9097b@google.com>
Date:   Tue, 19 Oct 2021 11:43:21 -0700
From:   syzbot <syzbot+578bea23bb8e6bd8c33c@...kaller.appspotmail.com>
To:     gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        rafael@...nel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] WARNING in dpm_sysfs_add

Hello,

syzbot found the following issue on:

HEAD commit:    ec681c53f8d2 Merge tag 'net-5.15-rc6' of git://git.kernel...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=166855f4b00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bab9d35f204746a7
dashboard link: https://syzkaller.appspot.com/bug?extid=578bea23bb8e6bd8c33c
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: i386

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+578bea23bb8e6bd8c33c@...kaller.appspotmail.com

usb 7-1: Falling back to sysfs fallback for: ueagle-atm/eagleI.fw
------------[ cut here ]------------
sysfs group 'power' not found for kobject 'ueagle-atm!eagleI.fw'
WARNING: CPU: 0 PID: 5 at fs/sysfs/group.c:279 sysfs_remove_group+0x126/0x170 fs/sysfs/group.c:279
Modules linked in:
CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.15.0-rc5-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: events request_firmware_work_func
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 4e 9d 89 e8 d6 db fd 06 <0f> 0b eb 98 e8 a1 77 c8 ff e9 01 ff ff ff 48 89 df e8 94 77 c8 ff
RSP: 0018:ffffc9000036fa80 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffffffff89fcfc20 RCX: 0000000000000000
RDX: ffff8880115b0000 RSI: ffffffff815e88a8 RDI: fffff5200006df42
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815e264e R11: 0000000000000000 R12: ffff8880480f9008
R13: ffffffff89fd01c0 R14: 1ffff9200006df63 R15: ffff88804dde40a8
FS:  0000000000000000(0000) GS:ffff88802ca00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563e4a92aed0 CR3: 00000000221dc000 CR4: 0000000000150ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 dpm_sysfs_add+0x1f4/0x290 drivers/base/power/sysfs.c:734
 device_add+0xac4/0x1ee0 drivers/base/core.c:3352
 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:507 [inline]
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:583 [inline]
 firmware_fallback_sysfs+0x408/0xe70 drivers/base/firmware_loader/fallback.c:659
 _request_firmware+0xbb5/0x1040 drivers/base/firmware_loader/main.c:833
 request_firmware_work_func+0xdd/0x230 drivers/base/firmware_loader/main.c:1079
 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295


---
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