syzbot


WARNING in kernfs_get (5)

Status: upstream: reported syz repro on 2024/05/08 11:07
Subsystems: usb kernfs
[Documentation on labels]
Reported-by: syzbot+2f44671e54488d20f0e6@syzkaller.appspotmail.com
First crash: 425d, last: 20h09m
Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: SYZFAIL: NL802154_CMD_SET_SHORT_ADDR failed (log)
Repro: syz .config
  
Discussions (11)
Title Replies (including bot) Last reply
[syzbot] Monthly kernfs report (Jun 2025) 0 (1) 2025/06/23 07:33
[syzbot] Monthly kernfs report (May 2025) 0 (1) 2025/05/21 14:55
[syzbot] Monthly kernfs report (Apr 2025) 0 (1) 2025/04/22 10:11
[syzbot] Monthly kernfs report (Mar 2025) 0 (1) 2025/03/19 21:29
[syzbot] Monthly kernfs report (Feb 2025) 0 (1) 2025/02/16 21:54
[syzbot] Monthly kernfs report (Jan 2025) 0 (1) 2025/01/16 10:12
[syzbot] Monthly kernfs report (Dec 2024) 0 (1) 2024/12/16 09:45
[syzbot] Monthly kernfs report (Nov 2024) 0 (1) 2024/11/15 11:25
[syzbot] Monthly kernfs report (Oct 2024) 0 (1) 2024/10/15 10:07
[syzbot] Monthly kernfs report (Jul 2024) 0 (1) 2024/07/09 14:10
[syzbot] [kernfs?] WARNING in kernfs_get (5) 3 (8) 2024/05/16 14:52
Similar bugs (8)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 WARNING in kernfs_get C done 14 2121d 2261d 1/1 fixed on 2019/12/05 23:59
linux-6.6 WARNING in kernfs_get 1 6d03h 6d03h 0/2 upstream: reported on 2025/06/28 04:30
upstream WARNING in kernfs_get (2) kernfs 2 1741d 1759d 0/29 auto-closed as invalid on 2021/01/25 03:55
linux-4.14 WARNING in kernfs_get C done 17 2145d 2265d 1/1 fixed on 2019/12/07 19:24
upstream WARNING in kernfs_get (4) kernfs syz error 3 877d 880d 0/29 auto-obsoleted due to no activity on 2023/06/07 19:32
upstream WARNING in kernfs_get C done 316 2160d 2489d 13/29 fixed on 2019/11/20 22:01
upstream WARNING in kernfs_get (3) kernfs 3 1306d 1310d 0/29 auto-closed as invalid on 2022/02/04 06:25
android-414 WARNING in kernfs_get syz 69 2124d 2276d 0/1 public: reported syz repro on 2019/04/10 15:44
Last patch testing requests (4)
Created Duration User Patch Repo Result
2024/05/29 02:18 19m retest repro linux-next report log
2024/05/16 14:28 21m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 26dd54d03cd9 OK log
2024/05/15 10:33 2h32m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 26dd54d03cd9 OK log
2024/05/14 23:23 1h04m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 26dd54d03cd9 report log

Sample crash report:
usb 3-1: Falling back to sysfs fallback for: ueagle-atm/eagleII.fw
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6245 at fs/kernfs/dir.c:537 kernfs_get+0x72/0x90 fs/kernfs/dir.c:537
Modules linked in:
CPU: 1 UID: 0 PID: 6245 Comm: kworker/1:28 Not tainted 6.16.0-rc3-syzkaller-00042-g78f4e737a53e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events request_firmware_work_func
RIP: 0010:kernfs_get+0x72/0x90 fs/kernfs/dir.c:537
Code: e8 33 e9 61 ff 48 89 df be 04 00 00 00 e8 96 6e c5 ff f0 ff 03 eb 05 e8 1c e9 61 ff 5b 5d e9 d5 9a 11 09 cc e8 0f e9 61 ff 90 <0f> 0b 90 eb d6 89 d9 80 e1 07 80 c1 03 38 c1 7c b6 48 89 df e8 95
RSP: 0018:ffffc9000473f5e0 EFLAGS: 00010293
RAX: ffffffff825ea411 RBX: ffff888031d3d690 RCX: ffff88802b9d3c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888031d3d693 R09: 1ffff110063a7ad2
R10: dffffc0000000000 R11: ffffed10063a7ad3 R12: ffff888032209328
R13: 1ffff11006441266 R14: ffff888032209330 R15: 1ffff11006441265
FS:  0000000000000000(0000) GS:ffff888125b1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555893f4808 CR3: 000000000e138000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 sysfs_get include/linux/sysfs.h:799 [inline]
 create_dir lib/kobject.c:89 [inline]
 kobject_add_internal+0x632/0xb40 lib/kobject.c:240
 kobject_add_varg lib/kobject.c:374 [inline]
 kobject_add+0x155/0x220 lib/kobject.c:426
 class_dir_create_and_add drivers/base/core.c:3235 [inline]
 get_device_parent+0x316/0x3a0 drivers/base/core.c:3286
 device_add+0x2e1/0xb50 drivers/base/core.c:3616
 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:86 [inline]
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:162 [inline]
 firmware_fallback_sysfs+0x2e4/0x9b0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xf83/0x15b0 drivers/base/firmware_loader/main.c:915
 request_firmware_work_func+0xaf/0x1c0 drivers/base/firmware_loader/main.c:1168
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Crashes (395):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/24 03:19 upstream 78f4e737a53e 1a7fb460 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kernfs_get
2025/05/02 02:41 upstream ebd297a2affa 51b137cd .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2024/12/24 10:41 upstream f07044dd0df0 444551c4 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2024/05/14 15:44 linux-next 26dd54d03cd9 fdb4c10c .config console log report syz [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kernfs_get
2025/07/02 03:01 upstream 66701750d556 ffe4b334 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/06/30 17:13 upstream d0b3b7b22dfa fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/06/29 09:15 upstream aaf724ed6926 fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/06/29 04:35 upstream aaf724ed6926 fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/06/26 20:41 upstream e34a79b96ab9 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/06/25 21:37 upstream 92ca6c498a5e 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/06/23 18:39 upstream 86731a2a651e 1a7fb460 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/06/22 04:08 upstream f7301f856d35 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/06/22 00:39 upstream 3f75bfff44be d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/06/21 19:48 upstream 3f75bfff44be d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/06/21 16:24 upstream 11313e2f7812 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/06/18 14:41 upstream 52da431bf03b ca631f70 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kernfs_get
2025/06/18 00:33 upstream 52da431bf03b 417d98fa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/06/16 03:58 upstream 08215f5486ec 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in kernfs_get
2025/06/15 20:33 upstream 08215f5486ec 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/06/15 07:52 upstream 8c6bc74c7f89 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/06/14 15:16 upstream 4774cfe3543a 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/06/14 12:55 upstream 02adc1490e6d 0e8da31f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/06/14 08:22 upstream 02adc1490e6d 0e8da31f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/06/12 10:51 upstream 488ef3560196 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/06/10 02:46 upstream 19272b37aa4f 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kernfs_get
2025/06/09 22:15 upstream 19272b37aa4f 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/06/08 20:44 upstream 8630c59e9936 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/06/04 15:55 upstream 5abc7438f1e9 fd5e6e61 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/06/04 04:02 upstream f5164456c604 a30356b7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/06/02 19:14 upstream cd2e103d57e5 b396b4bf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/06/01 14:17 upstream 7d4e49a77d99 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/06/01 02:28 upstream 4cb6c8af8591 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/05/30 09:48 upstream f66bc387efbe 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/05/28 02:12 upstream 015a99fa7665 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/05/27 03:37 upstream 0ff41df1cb26 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/05/26 18:23 upstream 0ff41df1cb26 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/05/26 09:21 upstream 0f8c0258bf04 2d4582d0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/05/26 01:03 upstream 0f8c0258bf04 2d4582d0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/05/25 21:32 upstream d0c22de9995b ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/05/24 23:59 upstream b1427432d3b6 ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/05/22 02:03 upstream d608703fcdd9 0919b50b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/05/20 21:11 upstream b36ddb9210e6 8f9cf946 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/05/17 20:27 upstream 172a9d94339c f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/05/17 03:56 upstream 3c21441eeffc f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/05/13 17:21 upstream e9565e23cd89 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/05/07 00:21 upstream 0d8d44db295c 350f4ffc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/05/01 23:27 upstream ebd297a2affa 51b137cd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/04/27 11:30 upstream 5bc1018675ec c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/04/27 00:56 upstream d22aad29de2a c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in kernfs_get
2025/04/26 18:38 upstream f1a3944c860b c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/04/26 07:01 upstream f1a3944c860b c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in kernfs_get
2025/04/24 18:48 upstream e72e9e693307 9c80ffa0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/04/23 12:31 upstream bc3372351d0c d971f7e2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in kernfs_get
2025/04/22 03:05 upstream 9d7a0577c9db 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/04/21 09:35 upstream 9d7a0577c9db 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2024/05/04 10:57 upstream 3d25a941ea50 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/06/15 05:00 upstream 8c6bc74c7f89 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kernfs_get
2025/05/27 04:43 upstream 0ff41df1cb26 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kernfs_get
2025/05/18 00:47 upstream 5723cc3450bc f41472b0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kernfs_get
2025/05/05 22:07 upstream 92a09c47464d 6ca47dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kernfs_get
2025/05/25 10:05 upstream d0c22de9995b ed351ea7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kernfs_get
2025/05/26 19:59 upstream 0ff41df1cb26 874a1386 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in kernfs_get
2025/02/18 22:13 net-next 4991b88c2514 c37c7249 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in kernfs_get
2025/07/03 12:08 linux-next 8d6c58332c7a 115ceea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kernfs_get
2025/06/30 05:44 linux-next 2aeda9592360 fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kernfs_get
2025/06/22 17:57 linux-next 5d4809e25903 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kernfs_get
2025/05/24 06:10 linux-next 176e917e010c ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kernfs_get
* Struck through repros no longer work on HEAD.