syzbot


WARNING in dpm_sysfs_add (2)

Status: upstream: reported on 2025/06/17 06:14
Reported-by: syzbot+79fdc552f795fc6febfb@syzkaller.appspotmail.com
First crash: 24d, last: 24d
Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in dpm_sysfs_add -1 2 277d 335d 0/3 auto-obsoleted due to no activity on 2025/01/15 07:21
upstream WARNING in dpm_sysfs_add fs -1 26 790d 1360d 0/29 auto-obsoleted due to no activity on 2023/08/23 09:06
upstream WARNING in dpm_sysfs_add (2) fs -1 6 545d 654d 0/29 auto-obsoleted due to no activity on 2024/04/11 10:23

Sample crash report:
usb 8-1: Direct firmware load for ueagle-atm/eagleII.fw failed with error -2
usb 8-1: 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: 21 at fs/sysfs/group.c:281 sysfs_remove_group+0x174/0x290 fs/sysfs/group.c:279
Modules linked in:
CPU: 1 PID: 21 Comm: kworker/1:0 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events request_firmware_work_func
RIP: 0010:sysfs_remove_group+0x174/0x290 fs/sysfs/group.c:279
Code: 48 8b 1b 4c 89 f8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ff e8 ce d3 d0 ff 49 8b 17 48 c7 c7 00 a0 19 8a 48 89 de e8 7c 41 aa 07 <0f> 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 96 5b 8b ff
RSP: 0018:ffffc90000db79d8 EFLAGS: 00010246
RAX: fb3822e56b7b2900 RBX: ffffffff8a7bb300 RCX: ffff88813fe61dc0
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: dffffc0000000000 R09: ffffed10172267a8
R10: ffffed10172267a8 R11: 1ffff110172267a7 R12: 1ffffffff14f7664
R13: 1ffff1100f259c3c R14: ffff88805b5d8e80 R15: ffff8880792ce008
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feeac9baeb8 CR3: 000000002a644000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 0000000000000047 DR2: 0000000000000005
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dpm_sysfs_add+0x1fe/0x270 drivers/base/power/sysfs.c:734
 device_add+0x715/0xfb0 drivers/base/core.c:3369
 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+0x3e9/0xbc0 drivers/base/firmware_loader/fallback.c:659
 _request_firmware+0xc86/0x12b0 drivers/base/firmware_loader/main.c:876
 request_firmware_work_func+0xac/0x1b0 drivers/base/firmware_loader/main.c:1127
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/17 06:13 linux-5.15.y 1c700860e8bc cfebc887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in dpm_sysfs_add
* Struck through repros no longer work on HEAD.