syzbot


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: 182d, last: 2d19h
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 610d 1748d 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 236 11d 996d 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 216 2d00h 996d 0/3 upstream: reported C repro on 2023/03/26 16:24
upstream WARNING in firmware_fallback_sysfs (2) kernel -1 150 4d16h 494d 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: 0 PID: 8 at fs/sysfs/group.c:284 sysfs_remove_group+0x178/0x2a0 fs/sysfs/group.c:282
Modules linked in:

CPU: 0 PID: 8 Comm: kworker/0:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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 3a cc c9 ff 49 8b 17 48 c7 c7 00 a9 ba 8a 48 89 de e8 68 da 3c ff <0f> 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 22 5e 72 ff
RSP: 0018:ffffc900000d7800 EFLAGS: 00010246
RAX: a7680e6ba4220d00 RBX: ffffffff8b215360 RCX: ffff88801a275a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: dffffc0000000000 R08: ffffc900000d7507 R09: 1ffff9200001aea0
R10: dffffc0000000000 R11: fffff5200001aea1 R12: 1ffffffff1642a70
R13: 0000000000000001 R14: ffff8880764f58b8 R15: ffff888147ae8008
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33e63fff CR3: 000000000cb30000 CR4: 00000000003506f0
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 (224):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/11 18:02 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/22 20:35 linux-6.6.y bb9c90ab9c5a bf27483f .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/01 05:49 linux-6.6.y dbcb8d8e4163 0c075d67 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/29 05:21 linux-6.6.y dbcb8d8e4163 6654ea9c .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/26 07:54 linux-6.6.y dbcb8d8e4163 fb8f743d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
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
2025/12/14 01:05 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/12/12 03:32 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/12/09 06:03 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/12/08 04:54 linux-6.6.y 5fa4793a2d2d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/11/29 13:01 linux-6.6.y 1e89a1be4fe9 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/11/29 01:11 linux-6.6.y 1e89a1be4fe9 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/11/28 12:47 linux-6.6.y 1e89a1be4fe9 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/10/08 08:49 linux-6.6.y e617101e5626 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/09/29 08:13 linux-6.6.y 147338df3487 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/09/24 17:01 linux-6.6.y af1544b5d072 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/09/21 10:16 linux-6.6.y af1544b5d072 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/09/10 16:30 linux-6.6.y fe9731e10004 fdeaa69b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/09/09 09:09 linux-6.6.y 355bd0b51d2f d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/28 07:57 linux-6.6.y bb9c90ab9c5a e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/26 08:57 linux-6.6.y bb9c90ab9c5a bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/25 19:42 linux-6.6.y bb9c90ab9c5a bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/22 05:17 linux-6.6.y bb9c90ab9c5a bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/22 05:15 linux-6.6.y bb9c90ab9c5a bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/21 14:32 linux-6.6.y bb9c90ab9c5a 3e79b825 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/20 17:59 linux-6.6.y bb9c90ab9c5a 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/20 16:04 linux-6.6.y bb9c90ab9c5a 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/20 04:17 linux-6.6.y bb9c90ab9c5a 79512909 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/20 03:11 linux-6.6.y bb9c90ab9c5a 79512909 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
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 firmware_fallback_sysfs
2025/08/19 16:00 linux-6.6.y bb9c90ab9c5a 254a27c1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/19 15:58 linux-6.6.y bb9c90ab9c5a 254a27c1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/19 03:53 linux-6.6.y bb9c90ab9c5a 523f460e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/15 13:41 linux-6.6.y bb9c90ab9c5a 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/15 09:44 linux-6.6.y 3a8ababb8b6a 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/12 14:58 linux-6.6.y 3a8ababb8b6a c06e8995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/12 14:58 linux-6.6.y 3a8ababb8b6a c06e8995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/08 15:38 linux-6.6.y 3a8ababb8b6a 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/08 05:02 linux-6.6.y 3a8ababb8b6a 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/08 02:47 linux-6.6.y 3a8ababb8b6a 6a893178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/07 11:44 linux-6.6.y 3a8ababb8b6a 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/06 23:13 linux-6.6.y 3a8ababb8b6a 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/05 23:27 linux-6.6.y 3a8ababb8b6a ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/05 12:06 linux-6.6.y 3a8ababb8b6a 37880f40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/04 19:17 linux-6.6.y 3a8ababb8b6a f5bcc8dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/02 00:58 linux-6.6.y 3a8ababb8b6a 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/01 17:48 linux-6.6.y 3a8ababb8b6a 40127d41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/08/01 10:34 linux-6.6.y 3a8ababb8b6a 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2025/07/31 17:03 linux-6.6.y dbcb8d8e4163 0c075d67 .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.