WARNING in netdev_queue_update_kobjects

Status: upstream: reported on 2026/09/15 01:16
Reported-by: syzbot+96c9c1ba229d67f0269e@syzkaller.appspotmail.com
First crash: 33d, last: 23h46m
▶ ▼ Similar bugs (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in netdev_queue_update_kobjects -1 7 899d 913d 0/3 auto-obsoleted due to no activity on 2024/08/10 09:34
upstream WARNING in netdev_queue_update_kobjects fs -1 6 1776d 1808d 0/29 auto-closed as invalid on 2022/03/06 23:23
upstream WARNING in netdev_queue_update_kobjects (2) fs -1 syz, C error error 18 909d 909d 0/29 auto-obsoleted due to no activity on 2024/07/01 12:34
linux-5.15 WARNING in netdev_queue_update_kobjects (3) -1 10 22h59m 29d 0/3 upstream: reported on 2026/09/19 09:17
linux-6.1 WARNING in netdev_queue_update_kobjects -1 16 900d 912d 0/3 auto-obsoleted due to no activity on 2024/07/10 12:34
linux-5.15 WARNING in netdev_queue_update_kobjects (2) origin:upstream -1 syz, C done 303 673d 716d 3/3 fixed on 2025/01/25 04:10
linux-6.1 WARNING in netdev_queue_update_kobjects (2) origin:lts-only -1 syz, C done 344 673d 716d 3/3 fixed on 2025/01/25 04:10
linux-6.1 WARNING in netdev_queue_update_kobjects (3) -1 syz 71 4h07m 33d 0/3 upstream: reported syz repro on 2026/09/15 17:57

Sample crash report:
------------[ cut here ]------------
sysfs group 'byte_queue_limits' not found for kobject 'tx-0'
WARNING: CPU: 1 PID: 7134 at fs/sysfs/group.c:284 sysfs_remove_group+0x17b/0x290 fs/sysfs/group.c:282
Modules linked in:
CPU: 1 PID: 7134 Comm: kworker/1:4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: events delete_netdev
RIP: 0010:sysfs_remove_group+0x17b/0x290 fs/sysfs/group.c:282
Code: 8b 1b 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 f7 19 c9 ff 49 8b 17 48 c7 c7 c0 ce da 8a 48 89 de e8 55 f7 39 ff <0f> 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 9f 38 70 ff
RSP: 0018:ffffc9000bb27840 EFLAGS: 00010246

RAX: d2fd6f29ca8ba300 RBX: ffffffff8bc5d2a0 RCX: ffff8880602f8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000076 R08: ffffc9000bb27447 R09: 1ffff92001764e88
R10: dffffc0000000000 R11: fffff52001764e89 R12: 1ffffffff178b950
R13: dffffc0000000000 R14: ffff88805e1dd0f8 R15: ffff88806a4cf020
FS:  0000000000000000(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000410 CR3: 0000000031107000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 netdev_queue_update_kobjects+0x3e1/0x480 net/core/net-sysfs.c:1758
 remove_queue_kobjects net/core/net-sysfs.c:1857 [inline]
 netdev_unregister_kobject+0x108/0x250 net/core/net-sysfs.c:2010
 unregister_netdevice_many_notify+0x1449/0x1910 net/core/dev.c:11211
 unregister_netdevice_many net/core/dev.c:11237 [inline]
 unregister_netdevice_queue+0x2e9/0x330 net/core/dev.c:11117
 unregister_netdevice include/linux/netdevice.h:3194 [inline]
 lowpan_unregister_netdevice net/6lowpan/core.c:66 [inline]
 lowpan_unregister_netdev+0x1c/0x30 net/6lowpan/core.c:74
 unregister_dev+0x70/0x1a0 net/bluetooth/6lowpan.c:763
 process_one_work kernel/workqueue.c:2657 [inline]
 process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734
 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>

Crashes (99):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/17 21:45 linux-6.6.y cecd39af8a1a 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/17 03:08 linux-6.6.y cecd39af8a1a 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/16 19:30 linux-6.6.y cecd39af8a1a 4c840a2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/16 14:51 linux-6.6.y cecd39af8a1a 4c840a2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/16 01:58 linux-6.6.y cecd39af8a1a 3f2522c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/16 00:54 linux-6.6.y cecd39af8a1a 3f2522c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/14 17:01 linux-6.6.y a91a6aa9253c 1a71827b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/14 01:02 linux-6.6.y a91a6aa9253c 7321cd29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/13 16:47 linux-6.6.y a91a6aa9253c 5a1eeac4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/13 15:38 linux-6.6.y a91a6aa9253c 5a1eeac4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/13 04:19 linux-6.6.y a91a6aa9253c 745a967f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/13 00:27 linux-6.6.y a91a6aa9253c 745a967f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/12 17:14 linux-6.6.y a91a6aa9253c 745a967f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/08 09:29 linux-6.6.y a91a6aa9253c 4f6a9fcf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/07 13:22 linux-6.6.y a91a6aa9253c 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/06 05:48 linux-6.6.y a91a6aa9253c f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/06 03:51 linux-6.6.y a91a6aa9253c f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/05 14:58 linux-6.6.y a91a6aa9253c af63e995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/04 19:36 linux-6.6.y a91a6aa9253c 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/03 20:27 linux-6.6.y a91a6aa9253c 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/03 15:41 linux-6.6.y a91a6aa9253c 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/02 23:35 linux-6.6.y 79643295eba1 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/02 04:26 linux-6.6.y 79643295eba1 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/01 15:11 linux-6.6.y 79643295eba1 f5cdae2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/01 11:56 linux-6.6.y 79643295eba1 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/01 02:30 linux-6.6.y 79643295eba1 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/10/01 02:29 linux-6.6.y 79643295eba1 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/30 11:56 linux-6.6.y 79643295eba1 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/30 00:17 linux-6.6.y 79643295eba1 328436b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/29 21:23 linux-6.6.y 79643295eba1 328436b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/29 07:42 linux-6.6.y 79643295eba1 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/29 05:46 linux-6.6.y 79643295eba1 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/28 10:01 linux-6.6.y 79643295eba1 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/26 14:57 linux-6.6.y 79643295eba1 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/26 08:19 linux-6.6.y 79643295eba1 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/26 06:12 linux-6.6.y 79643295eba1 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/25 11:45 linux-6.6.y 79643295eba1 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/25 08:16 linux-6.6.y 79643295eba1 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/24 19:53 linux-6.6.y 79643295eba1 3c3cdf19 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/24 19:48 linux-6.6.y 79643295eba1 3c3cdf19 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/24 13:34 linux-6.6.y 79643295eba1 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/24 06:48 linux-6.6.y 79643295eba1 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/24 05:54 linux-6.6.y 79643295eba1 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/24 05:54 linux-6.6.y 79643295eba1 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/24 05:45 linux-6.6.y 79643295eba1 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/24 05:44 linux-6.6.y 79643295eba1 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/24 05:44 linux-6.6.y 79643295eba1 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/24 05:44 linux-6.6.y 79643295eba1 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/23 17:01 linux-6.6.y 79643295eba1 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/23 15:22 linux-6.6.y 79643295eba1 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/23 15:07 linux-6.6.y 79643295eba1 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/17 02:42 linux-6.6.y 79643295eba1 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/17 02:41 linux-6.6.y 79643295eba1 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/17 02:39 linux-6.6.y 79643295eba1 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/16 10:36 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/16 10:35 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/16 10:32 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/16 08:28 linux-6.6.y 79643295eba1 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
2026/09/15 01:15 linux-6.6.y 79643295eba1 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in netdev_queue_update_kobjects
* Struck through repros no longer work on HEAD.