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WARNING in firmware_fallback_sysfs

Status: upstream: reported C repro on 2025/06/17 10:18
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+86b0dea5aa810f02bf47@syzkaller.appspotmail.com
First crash: 31d, last: 10h48m
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2025/06/22 linux-6.6.y (ToT) 6282921b6825 C [report] WARNING in firmware_fallback_sysfs
2025/06/22 upstream (ToT) 739a6c93cc75 C Didn't crash
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in firmware_fallback_sysfs usb fs -1 C error error 3432 459d 1597d 0/29 auto-obsoleted due to no activity on 2024/06/24 11:12
linux-5.15 WARNING in firmware_fallback_sysfs missing-backport origin:upstream -1 C error 174 7d16h 845d 0/3 upstream: reported C repro on 2023/03/26 17:15
linux-6.1 WARNING in firmware_fallback_sysfs origin:upstream missing-backport -1 C error 184 19h26m 845d 0/3 upstream: reported C repro on 2023/03/26 16:24
upstream WARNING in firmware_fallback_sysfs (2) kernel -1 65 2d05h 343d 0/29 upstream: reported on 2024/08/09 15:45
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2025/07/13 12:26 1h54m fix candidate upstream OK (0) job log

Sample crash report:
------------[ cut here ]------------
sysfs group 'power' not found for kobject 'ueagle-atm!eagleII.fw'
WARNING: CPU: 1 PID: 2178 at fs/sysfs/group.c:284 sysfs_remove_group+0x178/0x2a0 fs/sysfs/group.c:282
Modules linked in:
CPU: 1 PID: 2178 Comm: kworker/1:3 Not tainted 6.6.94-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+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 ea d0 c9 ff 49 8b 17 48 c7 c7 40 bc ba 8a 48 89 de e8 b8 8e 3b ff <0f> 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 a2 29 71 ff
RSP: 0018:ffffc900050f7800 EFLAGS: 00010246
RAX: dee5df3ebe3c0100 RBX: ffffffff8b2148e0 RCX: ffff88802623bc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: dffffc0000000000 R08: ffffc900050f7407 R09: 1ffff92000a1ee80
R10: dffffc0000000000 R11: fffff52000a1ee81 R12: 1ffffffff1642920
R13: 0000000000000001 R14: ffff88814c1f9e88 R15: ffff888144f4a008
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7fefd0a128 CR3: 000000000cb30000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 device_del+0x251/0x900 drivers/base/core.c:3847
 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:120 [inline]
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:158 [inline]
 firmware_fallback_sysfs+0x682/0x940 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 (72):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/25 15:22 linux-6.6.y 6282921b6825 26d77996 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/22 10:42 linux-6.6.y 6282921b6825 d6cdfb8a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/18 20:55 linux-6.6.y d96eb99e2f0e 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/18 14:24 linux-6.6.y d96eb99e2f0e 88248e14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/18 05:14 linux-6.6.y d96eb99e2f0e 88248e14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/17 15:15 linux-6.6.y 9247f4e6573a 0d1223f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/17 15:00 linux-6.6.y 9247f4e6573a 0d1223f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/17 03:05 linux-6.6.y 9247f4e6573a 44f8051e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/16 21:41 linux-6.6.y 9247f4e6573a 44f8051e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/16 15:47 linux-6.6.y 9247f4e6573a 124ec9cc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/16 10:30 linux-6.6.y 9247f4e6573a 124ec9cc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/15 04:35 linux-6.6.y 9247f4e6573a 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/15 04:35 linux-6.6.y 9247f4e6573a 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/15 04:35 linux-6.6.y 9247f4e6573a 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/15 03:03 linux-6.6.y 9247f4e6573a d8fc7335 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/14 17:51 linux-6.6.y 9247f4e6573a d8fc7335 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/14 12:15 linux-6.6.y 59a2de10b81a d8fc7335 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/14 12:10 linux-6.6.y 59a2de10b81a d8fc7335 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/13 12:22 linux-6.6.y 59a2de10b81a 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/10 10:49 linux-6.6.y a5df3a702b2c 956bd956 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/10 10:48 linux-6.6.y a5df3a702b2c 956bd956 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/07 17:07 linux-6.6.y a5df3a702b2c 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/28 03:53 linux-6.6.y 3f5b4c104b7d fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/27 13:57 linux-6.6.y 3f5b4c104b7d 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/27 13:53 linux-6.6.y 3f5b4c104b7d 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/27 13:52 linux-6.6.y 3f5b4c104b7d 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/26 15:58 linux-6.6.y 6282921b6825 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/26 15:58 linux-6.6.y 6282921b6825 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/24 19:16 linux-6.6.y 6282921b6825 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/24 19:14 linux-6.6.y 6282921b6825 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/24 19:13 linux-6.6.y 6282921b6825 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/23 23:33 linux-6.6.y 6282921b6825 e2f27c35 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/21 03:04 linux-6.6.y 6282921b6825 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/21 03:03 linux-6.6.y 6282921b6825 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/20 13:39 linux-6.6.y 6282921b6825 804b3919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/20 13:39 linux-6.6.y 6282921b6825 804b3919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/19 16:06 linux-6.6.y 6282921b6825 ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/19 16:05 linux-6.6.y 6282921b6825 ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/18 12:36 linux-6.6.y c2603c511feb ca631f70 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/18 12:36 linux-6.6.y c2603c511feb ca631f70 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/18 12:34 linux-6.6.y c2603c511feb ca631f70 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/17 20:14 linux-6.6.y c2603c511feb e77fae15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/17 10:23 linux-6.6.y c2603c511feb cfebc887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/17 10:23 linux-6.6.y c2603c511feb cfebc887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/17 10:21 linux-6.6.y c2603c511feb cfebc887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/17 10:20 linux-6.6.y c2603c511feb cfebc887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/17 10:20 linux-6.6.y c2603c511feb cfebc887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/17 10:18 linux-6.6.y c2603c511feb cfebc887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/06/17 10:18 linux-6.6.y c2603c511feb cfebc887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
* Struck through repros no longer work on HEAD.