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: 370d, last: 20d
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 798d 1936d 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 290 1d18h 1184d 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 253 4d11h 1184d 0/3 upstream: reported C repro on 2023/03/26 16:24
upstream WARNING in firmware_fallback_sysfs (2) prio:low kernel -1 251 1d04h 682d 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:
sysfs group 'power' not found for kobject 'ueagle-atm!eagleI.fw'
WARNING: CPU: 1 PID: 5929 at fs/sysfs/group.c:284 sysfs_remove_group+0x178/0x2a0 fs/sysfs/group.c:282
Modules linked in:
CPU: 1 PID: 5929 Comm: kworker/1:4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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 ca 1d c9 ff 49 8b 17 48 c7 c7 c0 bc da 8a 48 89 de e8 08 90 3a ff <0f> 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 52 de 70 ff
RSP: 0018:ffffc90003407800 EFLAGS: 00010246
RAX: e4912b8b0a8a8300 RBX: ffffffff8b41cda0 RCX: ffff888027330000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: dffffc0000000000 R08: ffffffff911cc547 R09: 1ffffffff22398a8
R10: dffffc0000000000 R11: fffffbfff22398a9 R12: 1ffffffff16839b8
R13: 0000000000000001 R14: ffff88802e8dd000 R15: ffff88802e9d2008
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2cf63fff CR3: 000000000cf32000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 device_del+0x251/0x910 drivers/base/core.c:3862
 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+0x682/0x930 drivers/base/firmware_loader/fallback.c:234
 _request_firmware+0xf27/0x1510 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:2653 [inline]
 process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2730
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2811
 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 (533):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/05/30 05:26 linux-6.6.y 0a40c6fbd105 6b4a8443 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/30 04:35 linux-6.6.y 0a40c6fbd105 6b4a8443 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/30 03:40 linux-6.6.y 0a40c6fbd105 6b4a8443 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/04/25 16:44 linux-6.6.y 9760bf04666d 9c2d0995 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
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
2026/06/01 23:27 linux-6.6.y 924b4a879cbb 1095583b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/06/01 11:14 linux-6.6.y 0a40c6fbd105 8d8eeb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/31 12:14 linux-6.6.y 0a40c6fbd105 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/31 02:46 linux-6.6.y 0a40c6fbd105 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/29 14:11 linux-6.6.y 0a40c6fbd105 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/29 02:02 linux-6.6.y 0a40c6fbd105 4624854e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/28 14:15 linux-6.6.y 0a40c6fbd105 681715f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/28 02:09 linux-6.6.y 0a40c6fbd105 4c36e7e5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/27 17:19 linux-6.6.y 0a40c6fbd105 8777bdc3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/27 14:21 linux-6.6.y 0a40c6fbd105 8777bdc3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/26 23:23 linux-6.6.y 0a40c6fbd105 2b01f00e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/26 11:02 linux-6.6.y 0a40c6fbd105 a3e47276 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/23 14:07 linux-6.6.y 0a40c6fbd105 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/23 04:05 linux-6.6.y eac8889a3a1c c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/22 02:39 linux-6.6.y eac8889a3a1c 70ae9b03 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/21 14:13 linux-6.6.y eac8889a3a1c e195359d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/21 14:10 linux-6.6.y eac8889a3a1c e195359d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/21 01:59 linux-6.6.y eac8889a3a1c 41b8c833 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/20 13:37 linux-6.6.y eac8889a3a1c 62fb93a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/20 01:17 linux-6.6.y eac8889a3a1c 0909d65f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/19 12:38 linux-6.6.y eac8889a3a1c 223544dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/19 00:22 linux-6.6.y eac8889a3a1c 9f74d399 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/19 00:22 linux-6.6.y eac8889a3a1c 9f74d399 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/17 18:55 linux-6.6.y eac8889a3a1c de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/16 23:32 linux-6.6.y 4d922539ad7d de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/16 11:51 linux-6.6.y 4d922539ad7d a15a64a6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/15 23:47 linux-6.6.y 4d922539ad7d 81fb92f3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/15 16:37 linux-6.6.y 4d922539ad7d 9cd3beaa .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/14 00:06 linux-6.6.y 3b9f64db0496 6ccb967e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/13 11:34 linux-6.6.y 3b9f64db0496 fec2a7ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/13 11:34 linux-6.6.y 3b9f64db0496 fec2a7ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/13 06:40 linux-6.6.y 3b9f64db0496 a0949470 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/12 22:36 linux-6.6.y 3b9f64db0496 a0949470 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/12 10:51 linux-6.6.y 3b9f64db0496 07aeade5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/11 21:38 linux-6.6.y 3b9f64db0496 d168f260 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/11 09:43 linux-6.6.y 3b9f64db0496 845acb1c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/10 22:46 linux-6.6.y 3b9f64db0496 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/10 19:23 linux-6.6.y 3b9f64db0496 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/09 04:34 linux-6.6.y 3b9f64db0496 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/09 04:31 linux-6.6.y 3b9f64db0496 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/08 16:07 linux-6.6.y 3b9f64db0496 b2988c17 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/08 10:46 linux-6.6.y 3b9f64db0496 5633175a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/08 03:42 linux-6.6.y 258cf62a6dfd 5633175a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in firmware_fallback_sysfs
2026/05/07 19:25 linux-6.6.y 258cf62a6dfd cbf9e0fc .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.