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WARNING in dpm_sysfs_add

Status: upstream: reported on 2025/07/24 08:52
Reported-by: syzbot+dc2f8802d52a73a49d90@syzkaller.appspotmail.com
First crash: 57d, last: 30d
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in dpm_sysfs_add -1 2 347d 405d 0/3 auto-obsoleted due to no activity on 2025/01/15 07:21
linux-6.1 WARNING in dpm_sysfs_add origin:lts-only -1 C inconclusive 3 27d 28d 0/3 upstream: reported C repro on 2025/08/21 14:46
linux-5.15 WARNING in dpm_sysfs_add (2) -1 1 94d 94d 0/3 upstream: reported on 2025/06/17 06:14
upstream WARNING in dpm_sysfs_add fs -1 26 860d 1430d 0/29 auto-obsoleted due to no activity on 2023/08/23 09:06
upstream WARNING in dpm_sysfs_add (2) fs -1 6 616d 725d 0/29 auto-obsoleted due to no activity on 2024/04/11 10:23

Sample crash report:
usb 2-1: Direct firmware load for ueagle-atm/eagleII.fw failed with error -2
usb 2-1: Falling back to sysfs fallback for: ueagle-atm/eagleII.fw
------------[ cut here ]------------
sysfs group 'power' not found for kobject 'ueagle-atm!eagleII.fw'
WARNING: CPU: 1 PID: 5849 at fs/sysfs/group.c:284 sysfs_remove_group+0x178/0x2a0 fs/sysfs/group.c:282
Modules linked in:
CPU: 1 PID: 5849 Comm: kworker/1:4 Not tainted 6.6.102-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events request_firmware_work_func
RIP: 0010:sysfs_remove_group+0x178/0x2a0 fs/sysfs/group.c:282
Code: 48 8b 1b 4c 89 f8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ff e8 fa d1 c9 ff 49 8b 17 48 c7 c7 00 b3 ba 8a 48 89 de e8 88 0b 3d ff <0f> 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 a2 8a 72 ff
RSP: 0018:ffffc9000531f888 EFLAGS: 00010246
RAX: 72a66b9dc2ce1f00 RBX: ffffffff8b214da0 RCX: ffff88802cd33c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: dffffc0000000000 R08: ffffc9000531f487 R09: 1ffff92000a63e90
R10: dffffc0000000000 R11: fffff52000a63e91 R12: 1ffffffff16429b8
R13: 1ffff1100eef862a R14: ffff88805e0165d0 R15: ffff8880777c3008
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fedbbb0c072 CR3: 000000002113e000 CR4: 00000000003526e0
Call Trace:
 <TASK>
 dpm_sysfs_add+0x202/0x270 drivers/base/power/sysfs.c:734
 device_add+0x56a/0xc20 drivers/base/core.c:3643
 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:82 [inline]
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:158 [inline]
 firmware_fallback_sysfs+0x2e9/0x940 drivers/base/firmware_loader/fallback.c:234
 _request_firmware+0xed9/0x1510 drivers/base/firmware_loader/main.c:936
 request_firmware_work_func+0xb0/0x1b0 drivers/base/firmware_loader/main.c:1189
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/20 01:15 linux-6.6.y bb9c90ab9c5a 254a27c1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in dpm_sysfs_add
2025/07/31 17:02 linux-6.6.y dbcb8d8e4163 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in dpm_sysfs_add
2025/07/24 08:51 linux-6.6.y dbcb8d8e4163 0c1d6ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in dpm_sysfs_add
* Struck through repros no longer work on HEAD.