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: 474d, last: 2d12h
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 (12)
Title Replies (including bot) Last reply
[syzbot] Monthly kernfs report (Jul 2025) 0 (1) 2025/07/23 10:04
[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 Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 WARNING in kernfs_get -1 C done 14 2169d 2309d 1/1 fixed on 2019/12/05 23:59
linux-6.6 WARNING in kernfs_get -1 5 23d 54d 0/2 upstream: reported on 2025/06/28 04:30
upstream WARNING in kernfs_get (2) kernfs -1 2 1789d 1807d 0/29 auto-closed as invalid on 2021/01/25 03:55
linux-4.14 WARNING in kernfs_get -1 C done 17 2193d 2313d 1/1 fixed on 2019/12/07 19:24
upstream WARNING in kernfs_get (4) kernfs -1 syz error 3 925d 928d 0/29 auto-obsoleted due to no activity on 2023/06/07 19:32
upstream WARNING in kernfs_get -1 C done 316 2208d 2537d 13/29 fixed on 2019/11/20 22:01
upstream WARNING in kernfs_get (3) kernfs -1 3 1354d 1358d 0/29 auto-closed as invalid on 2022/02/04 06:25
android-414 WARNING in kernfs_get -1 syz 69 2172d 2324d 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 (445):
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
2025/08/16 01:30 upstream d7ee5bdce789 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/08/14 22:29 upstream 0cc53520e68b dcc075fb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/08/13 17:16 upstream 8742b2d8935f 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/08/09 16:28 upstream 0227b49b5027 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/08/09 01:13 upstream 37816488247d 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kernfs_get
2025/08/05 09:06 upstream 7e161a991ea7 abdcb213 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in kernfs_get
2025/08/01 16:17 upstream 89748acdf226 40127d41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/08/01 01:57 upstream 260f6f4fda93 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/07/31 14:17 upstream 260f6f4fda93 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/07/31 07:35 upstream e8d780dcd957 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/07/30 21:30 upstream 038d61fd6422 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/07/30 02:22 upstream ced1b9e0392d f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/07/29 03:09 upstream 038d61fd6422 c4a95487 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/07/25 17:19 upstream 2942242dde89 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/07/24 09:38 upstream 01a412d06bc5 0c1d6ded .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/07/24 04:06 upstream 01a412d06bc5 0c1d6ded .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/07/23 06:11 upstream 89be9a83ccf1 e1dd4f22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/07/22 05:16 upstream 89be9a83ccf1 1555463b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kernfs_get
2025/07/20 23:21 upstream f4a40a4282f4 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/07/19 08:51 upstream 4871b7cb27f4 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/07/18 20:35 upstream d786aba32000 f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/07/18 06:58 upstream 6832a9317eee 0d1223f1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kernfs_get
2025/07/16 05:00 upstream 155a3c003e55 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kernfs_get
2025/07/14 12:02 upstream 347e9f5043c8 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/07/13 21:15 upstream 5d5d62298b8b 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/07/13 14:05 upstream 3f31a806a62e 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/07/12 10:49 upstream 379f604cc3dc 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kernfs_get
2025/07/11 17:51 upstream bc9ff192a6c9 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/07/11 15:13 upstream bc9ff192a6c9 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/07/10 11:50 upstream 8c2e52ebbe88 19d4829f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kernfs_get
2025/07/09 15:09 upstream 733923397fd9 f4e5e155 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/07/07 22:10 upstream d7b8f8e20813 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/07/07 15:14 upstream d7b8f8e20813 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kernfs_get
2025/07/06 13:59 upstream 1f988d0788f5 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/07/06 10:33 upstream 05df91921da6 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/07/05 14:26 upstream a79a588fc176 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce 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
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
2025/08/11 20:40 upstream 8f5ae30d69d7 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kernfs_get
2025/08/07 14:17 upstream 6e64f4580381 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kernfs_get
2025/07/18 17:03 upstream 6832a9317eee f550e092 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kernfs_get
2025/07/08 18:59 upstream d006330be3f7 abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kernfs_get
2025/07/07 14:49 upstream d7b8f8e20813 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kernfs_get
2025/07/06 01:50 upstream a79a588fc176 4f67c4ae .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
2025/08/19 00:22 linux-next 3ac864c2d9bb 523f460e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kernfs_get
2025/08/17 18:50 linux-next 931e46dcbc7e 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kernfs_get
2025/08/01 14:34 linux-next 84b92a499e7e 40127d41 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kernfs_get
2025/07/21 05:08 linux-next d086c886ceb9 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kernfs_get
2025/07/14 07:46 linux-next a62b7a37e6fc 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kernfs_get
2025/07/08 16:55 linux-next 58ba80c47402 abade794 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root 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
* Struck through repros no longer work on HEAD.