syzbot


WARNING in kernfs_new_node (3)

Status: upstream: reported on 2024/08/19 18:26
Subsystems: kernfs
[Documentation on labels]
Reported-by: syzbot+306212936b13e520679d@syzkaller.appspotmail.com
First crash: 185d, last: 25d
Discussions (3)
Title Replies (including bot) Last reply
[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] [kernfs?] WARNING in kernfs_new_node (3) 0 (1) 2024/08/19 18:26
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in kernfs_new_node kernfs C done done 2 1797d 2022d 15/28 fixed on 2020/05/10 10:41
upstream WARNING in kernfs_new_node (2) kernfs 1 288d 284d 0/28 auto-obsoleted due to no activity on 2024/08/12 04:32

Sample crash report:
usb 2-1: Direct firmware load for ueagle-atm/eagleII.fw failed with error -2
usb 2-1: Falling back to sysfs fallback for: ueagle-atm/eagleII.fw
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8 at fs/kernfs/dir.c:526 kernfs_get fs/kernfs/dir.c:526 [inline]
WARNING: CPU: 0 PID: 8 at fs/kernfs/dir.c:526 kernfs_new_node+0x1d8/0x240 fs/kernfs/dir.c:703
Modules linked in:
CPU: 0 UID: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.13.0-syzkaller-01005-gb9d8a295ed6b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events request_firmware_work_func
RIP: 0010:kernfs_get fs/kernfs/dir.c:526 [inline]
RIP: 0010:kernfs_new_node+0x1d8/0x240 fs/kernfs/dir.c:703
Code: 74 08 48 89 ef e8 f8 40 c3 ff 48 89 5d 00 4c 89 f0 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d e9 b9 9b ad 09 e8 a9 d5 5c ff 90 <0f> 0b 90 eb a0 89 e9 80 e1 07 fe c1 38 c1 0f 8c 62 fe ff ff 48 89
RSP: 0018:ffffc900000d7558 EFLAGS: 00010293
RAX: ffffffff8242a557 RBX: ffff88814d0d7960 RCX: ffff88801cec5a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8242a4f4 R09: 1ffff11029a1af2c
R10: dffffc0000000000 R11: ffffed1029a1af2d R12: 00000000000041ed
R13: 0000000000000000 R14: ffff88804c014780 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f01dfacaafd CR3: 0000000032e80000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 kernfs_create_dir_ns+0x43/0x120 fs/kernfs/dir.c:1061
 sysfs_create_dir_ns+0x189/0x3a0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:73 [inline]
 kobject_add_internal+0x435/0x8d0 lib/kobject.c:240
 kobject_add_varg lib/kobject.c:374 [inline]
 kobject_add+0x152/0x220 lib/kobject.c:426
 class_dir_create_and_add drivers/base/core.c:3208 [inline]
 get_device_parent+0x391/0x410 drivers/base/core.c:3259
 device_add+0x325/0xbf0 drivers/base/core.c:3589
 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+0x307/0x9e0 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xe44/0x1430 drivers/base/firmware_loader/main.c:941
 request_firmware_work_func+0x12a/0x280 drivers/base/firmware_loader/main.c:1194
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xa68/0x1840 kernel/workqueue.c:3317
 worker_thread+0x870/0xd30 kernel/workqueue.c:3398
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Crashes (20):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/22 06:13 upstream b9d8a295ed6b da72ac06 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kernfs_new_node
2025/01/07 20:36 upstream fbfd64d25c7a f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_new_node
2025/01/07 01:12 upstream 5428dc1906dd f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_new_node
2024/12/15 06:04 upstream a0e3919a2df2 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_new_node
2024/12/12 17:14 upstream 231825b2e1ff 941924eb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_new_node
2024/12/12 09:42 upstream 231825b2e1ff ff949d25 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_new_node
2024/12/12 05:32 upstream 231825b2e1ff ff949d25 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_new_node
2024/12/09 12:52 upstream fac04efc5c79 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_new_node
2024/12/06 12:40 upstream 5076001689e4 946d28f0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_new_node
2024/12/04 20:54 upstream feffde684ac2 b50eb251 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in kernfs_new_node
2024/12/02 14:15 upstream e70140ba0d2b 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_new_node
2024/11/14 05:22 upstream f1b785f4c787 a8c99394 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_new_node
2024/10/19 01:03 upstream 4d939780b705 cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_new_node
2024/09/09 11:45 upstream da3ea35007d0 9750182a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kernfs_new_node
2024/08/15 18:17 upstream 1fb918967b56 e4bacdaf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in kernfs_new_node
2025/01/16 10:22 upstream 619f0b6fad52 968edaf4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kernfs_new_node
2025/01/01 20:53 upstream 56e6a3499e14 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kernfs_new_node
2024/10/03 12:32 upstream 7ec462100ef9 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kernfs_new_node
2024/09/29 02:17 upstream 3efc57369a0c ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in kernfs_new_node
2025/01/10 09:00 linux-next 7b4b9bf203da 67d7ec0a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in kernfs_new_node
* Struck through repros no longer work on HEAD.