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: 519d, last: 1d07h
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 (14)
Title Replies (including bot) Last reply
[syzbot] Monthly kernfs report (Sep 2025) 0 (1) 2025/09/23 13:33
[syzbot] Monthly kernfs report (Aug 2025) 0 (1) 2025/08/23 16:32
[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 2215d 2354d 1/1 fixed on 2019/12/05 23:59
linux-6.6 WARNING in kernfs_get -1 6 44d 99d 0/2 upstream: reported on 2025/06/28 04:30
upstream WARNING in kernfs_get (2) kernfs -1 2 1834d 1853d 0/29 auto-closed as invalid on 2021/01/25 03:55
linux-4.14 WARNING in kernfs_get -1 C done 17 2239d 2359d 1/1 fixed on 2019/12/07 19:24
upstream WARNING in kernfs_get (4) kernfs -1 syz error 3 971d 974d 0/29 auto-obsoleted due to no activity on 2023/06/07 19:32
upstream WARNING in kernfs_get -1 C done 316 2253d 2582d 13/29 fixed on 2019/11/20 22:01
upstream WARNING in kernfs_get (3) kernfs -1 3 1399d 1403d 0/29 auto-closed as invalid on 2022/02/04 06:25
android-414 WARNING in kernfs_get -1 syz 69 2217d 2370d 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 (490):
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
2025/10/04 16:09 upstream cbf33b8e0b36 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/10/01 20:11 upstream 50c19e20ed2e a1859138 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/09/26 00:26 upstream 4ff71af020ae 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/09/24 16:41 upstream cec1e6e5d1ab 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/09/23 16:09 upstream cec1e6e5d1ab 0ac7291c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/09/23 15:08 upstream cec1e6e5d1ab 0ac7291c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/09/22 21:04 upstream 07e27ad16399 0ac7291c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/09/21 18:58 upstream f975f08c2e89 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/09/21 08:18 upstream f975f08c2e89 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/09/21 05:23 upstream 3b08f56fbbb9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/09/17 11:36 upstream 5aca7966d2a7 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kernfs_get
2025/09/13 15:45 upstream 22f20375f5b7 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/09/09 10:47 upstream f777d1112ee5 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kernfs_get
2025/09/08 19:48 upstream f777d1112ee5 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/09/08 08:45 upstream 76eeb9b8de98 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/09/07 16:50 upstream 6ab41fca2e80 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/09/06 21:26 upstream d1d10cea0895 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/09/04 17:09 upstream b9a10f876409 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/09/02 14:09 upstream b320789d6883 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kernfs_get
2025/09/02 12:59 upstream b320789d6883 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/08/29 19:23 upstream fb679c832b64 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/08/29 07:45 upstream 07d9df80082b 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/08/27 18:43 upstream 39f90c196721 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_get
2025/08/26 00:38 upstream b6add54ba618 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_get
2025/08/23 22:23 upstream 8d245acc1e88 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce 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
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
2025/09/29 21:58 upstream e5f0a698b34e 86341da6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kernfs_get
2025/09/28 18:00 upstream 51a24b7deaae 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 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
2025/07/06 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
2025/10/04 04:23 linux-next 47a8d4b89844 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kernfs_get
2025/10/03 23:34 linux-next 47a8d4b89844 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kernfs_get
2025/10/01 12:28 linux-next 3b9b1f8df454 a1859138 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kernfs_get
2025/09/29 11:02 linux-next 262858079afd 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kernfs_get
2025/09/27 11:40 linux-next 262858079afd 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kernfs_get
2025/09/25 14:57 linux-next b5a4da2c459f 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kernfs_get
2025/09/25 03:31 linux-next b5a4da2c459f 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kernfs_get
2025/09/24 21:54 linux-next b5a4da2c459f 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kernfs_get
2025/09/24 14:44 linux-next ce7f1a983b07 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kernfs_get
2025/09/17 05:40 linux-next 05af76471921 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kernfs_get
2025/09/15 22:10 linux-next 590b221ed425 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kernfs_get
2025/09/14 17:44 linux-next 590b221ed425 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kernfs_get
2025/09/12 20:30 linux-next 590b221ed425 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kernfs_get
2025/09/11 16:57 linux-next 5f540c4aade9 fdeaa69b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kernfs_get
2025/09/10 17:52 linux-next 5f540c4aade9 fdeaa69b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-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
* Struck through repros no longer work on HEAD.