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WARNING in firmware_fallback_sysfs

Status: upstream: reported C repro on 2023/03/26 16:24
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+457452d30bcdda75ead2@syzkaller.appspotmail.com
First crash: 846d, last: 1d15h
Fix bisection: the issue occurs on the latest tested release (bisect log)
Crash: WARNING in firmware_fallback_sysfs (log)
Repro: C syz .config
  
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[PATCH 0/1] usb: ueagle-atm: wait for a firmware upload to complete 1 (1) 2025/04/10 09:31
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2024/04/24 linux-6.1.y (ToT) 6741e066ec76 C [report] WARNING in firmware_fallback_sysfs
2023/12/28 upstream (ToT) f5837722ffec C [report] WARNING in firmware_fallback_sysfs
2024/04/24 upstream (ToT) e88c4cfcb7b8 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 460d 1598d 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 8d12h 846d 0/3 upstream: reported C repro on 2023/03/26 17:15
linux-6.6 WARNING in firmware_fallback_sysfs origin:lts-only -1 C inconclusive 72 1d06h 32d 0/2 upstream: reported C repro on 2025/06/17 10:18
upstream WARNING in firmware_fallback_sysfs (2) kernel -1 66 19h01m 344d 0/29 upstream: reported on 2024/08/09 15:45
▶ ▼ Fix bisection attempts (7)
Created Duration User Patch Repo Result
2025/04/30 05:36 5m fix candidate upstream error job log
2025/03/02 01:52 12h04m fix candidate upstream error job log
2025/01/23 05:19 12h24m fix candidate upstream error job log
2024/09/29 07:36 12h12m fix candidate upstream error job log
2024/07/28 21:45 12h02m fix candidate upstream error job log
2024/06/08 04:56 1h22m bisect fix linux-6.1.y OK (0) job log log
2023/12/27 14:52 1h31m bisect fix linux-6.1.y OK (0) job log log

Sample crash report:
WARNING: CPU: 1 PID: 4264 at fs/sysfs/group.c:280 sysfs_remove_group+0x174/0x290 fs/sysfs/group.c:278
Modules linked in:
CPU: 1 PID: 4264 Comm: kworker/1:3 Not tainted 6.1.142-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:278
Code: 48 8b 1b 4c 89 f8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ff e8 0e 02 cc ff 49 8b 17 48 c7 c7 a0 8d 7c 8a 48 89 de e8 ec 97 46 ff <0f> 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 36 86 7a ff
RSP: 0018:ffffc90004077880 EFLAGS: 00010246
RAX: 2cbd01ebea5bec00 RBX: ffffffff8ae31a20 RCX: ffff88807b801dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffffbfff2117251
R10: fffffbfff2117251 R11: 1ffffffff2117250 R12: 1ffffffff15c6348
R13: dffffc0000000000 R14: ffff88801d3c49f8 R15: ffff888079858008
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0067f0020 CR3: 000000005bbe8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 device_del+0x2ae/0xa70 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+0x67e/0x930 drivers/base/firmware_loader/fallback.c:234
 _request_firmware+0xcad/0x1290 drivers/base/firmware_loader/main.c:884
 request_firmware_work_func+0xac/0x1b0 drivers/base/firmware_loader/main.c:1135
 process_one_work+0x898/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Crashes (184):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/02 21:59 linux-6.1.y 7e69c33e4858 bc80e4f0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2024/04/20 05:46 linux-6.1.y 6741e066ec76 af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2024/01/01 08:57 linux-6.1.y 4aa6747d9352 fb427a07 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2023/12/28 05:17 linux-6.1.y 4aa6747d9352 fb427a07 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/02/27 15:19 linux-6.1.y 3a8358583626 6a8fcbc4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2025/01/08 18:38 linux-6.1.y 7dc732d24ff7 f3558dbf .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2024/12/03 18:23 linux-6.1.y e4d90d63d385 578925bc .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2024/08/25 03:55 linux-6.1.y ee5e09825b81 d7d32352 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2024/05/08 23:43 linux-6.1.y 909ba1f1b414 20bf80e1 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2024/04/22 05:04 linux-6.1.y 6741e066ec76 af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2024/04/20 22:49 linux-6.1.y 6741e066ec76 af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2024/03/20 09:20 linux-6.1.y d7543167affd a485f239 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2024/03/01 05:45 linux-6.1.y 81e1dc2f7001 352ab904 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2024/03/01 05:08 linux-6.1.y 81e1dc2f7001 352ab904 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2024/02/27 10:59 linux-6.1.y 81e1dc2f7001 05e69c83 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2024/02/06 17:08 linux-6.1.y f1bb70486c9c 6404acf9 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2024/02/06 12:25 linux-6.1.y f1bb70486c9c 6404acf9 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2024/01/27 12:55 linux-6.1.y 883d1a956208 cc4a4020 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2023/03/26 16:24 linux-6.1.y e3a87a10f259 fbf0499a .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2023/07/02 23:29 linux-6.1.y 0f4ac6b4c5f0 bfc47836 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2023/06/18 03:24 linux-6.1.y ca87e77a2ef8 f3921d4d .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2023/08/11 05:15 linux-6.1.y 0a4a7855302d da3c3ef8 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2023/08/01 09:15 linux-6.1.y d2a6dc4eaf6d 2a0d0f29 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2023/06/18 04:07 linux-6.1.y ca87e77a2ef8 f3921d4d .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2023/05/29 19:23 linux-6.1.y a343b0dd87b4 cf184559 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2025/07/18 12:49 linux-6.1.y 3369c6df2fae 88248e14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/07/16 15:27 linux-6.1.y f2198ea7eb3e 124ec9cc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/06/20 19:59 linux-6.1.y 58485ff1a74f 804b3919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/06/19 23:29 linux-6.1.y 58485ff1a74f ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/06/18 14:42 linux-6.1.y 58485ff1a74f ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/06/17 02:37 linux-6.1.y 58485ff1a74f cfebc887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/06/15 18:38 linux-6.1.y 58485ff1a74f 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/06/15 04:41 linux-6.1.y 58485ff1a74f 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/28 05:42 linux-6.1.y da3c5173c55f 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/23 11:21 linux-6.1.y da3c5173c55f fa44301a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/19 08:03 linux-6.1.y 325285d9fc86 f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/18 14:10 linux-6.1.y 325285d9fc86 f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/18 08:16 linux-6.1.y 325285d9fc86 f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/18 06:11 linux-6.1.y 02b72ccb5f9d f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/17 21:08 linux-6.1.y 02b72ccb5f9d f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/17 21:04 linux-6.1.y 02b72ccb5f9d f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/17 07:05 linux-6.1.y 02b72ccb5f9d f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/17 07:04 linux-6.1.y 02b72ccb5f9d f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/17 03:55 linux-6.1.y 02b72ccb5f9d f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/16 20:00 linux-6.1.y 02b72ccb5f9d cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/09 16:06 linux-6.1.y 02b72ccb5f9d 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/08 00:58 linux-6.1.y ac7079a42ea5 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/07 00:07 linux-6.1.y ac7079a42ea5 350f4ffc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/02 08:12 linux-6.1.y b6736e03756f 51b137cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/04/09 11:25 linux-6.1.y 3dfebb87d7eb 47d015b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/04/03 19:23 linux-6.1.y 8e60a714ba3b d7ae3a11 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/04/01 15:31 linux-6.1.y 8e60a714ba3b b8645499 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/03/17 23:39 linux-6.1.y 344a09659766 ce3352cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/02/13 19:30 linux-6.1.y 0cbb5f65e52f a98a8417 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/01/29 03:21 linux-6.1.y 75cefdf153f5 865ef71e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/01/22 17:55 linux-6.1.y f4f677285b38 a44b0418 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/01/21 19:27 linux-6.1.y f4f677285b38 da72ac06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/01/20 18:27 linux-6.1.y f4f677285b38 6e87cfa2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/01/03 10:15 linux-6.1.y 7dc732d24ff7 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2024/12/20 06:56 linux-6.1.y 29f02ec58a94 0f61b415 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2024/12/19 18:05 linux-6.1.y 52f863f820fd 5905cb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2024/12/17 13:56 linux-6.1.y 52f863f820fd f93b2b55 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2024/12/09 12:01 linux-6.1.y e4d90d63d385 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2024/12/05 18:40 linux-6.1.y e4d90d63d385 29f61fce .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2024/12/04 05:39 linux-6.1.y e4d90d63d385 b50eb251 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2024/11/15 02:07 linux-6.1.y 59d7b1a7104a a8c99394 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in firmware_fallback_sysfs
2025/05/17 16:27 linux-6.1.y 02b72ccb5f9d f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2025/02/24 05:41 linux-6.1.y 3a8358583626 d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2025/01/09 05:21 linux-6.1.y 7dc732d24ff7 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
2025/01/08 04:35 linux-6.1.y 7dc732d24ff7 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in firmware_fallback_sysfs
* Struck through repros no longer work on HEAD.