linux-kernel - [syzbot] [wireless?] WARNING in ieee80211_teardown

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <6892600e.050a0220.7f033.002f.GAE@google.com>
Date: Tue, 05 Aug 2025 12:48:30 -0700
From: syzbot <syzbot+04851834dc894437cf21@...kaller.appspotmail.com>
To: johannes@...solutions.net, linux-kernel@...r.kernel.org, 
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [wireless?] WARNING in ieee80211_teardown_sdata

Hello,

syzbot found the following issue on:

HEAD commit:    89748acdf226 Merge tag 'drm-next-2025-08-01' of https://gi..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1603e2a2580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=8b51b56c81c0761d
dashboard link: https://syzkaller.appspot.com/bug?extid=04851834dc894437cf21
compiler:       Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/095171b2ab97/disk-89748acd.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/48866e36b5ed/vmlinux-89748acd.xz
kernel image: https://storage.googleapis.com/syzbot-assets/be4634873fa0/bzImage-89748acd.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+04851834dc894437cf21@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 1161 at net/mac80211/iface.c:848 ieee80211_teardown_sdata+0xd2/0x140 net/mac80211/iface.c:848
Modules linked in:
CPU: 0 UID: 0 PID: 1161 Comm: kworker/u8:8 Not tainted 6.16.0-syzkaller-10499-g89748acdf226 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: netns cleanup_net
RIP: 0010:ieee80211_teardown_sdata+0xd2/0x140 net/mac80211/iface.c:848
Code: f6 48 89 df 31 f6 31 d2 e8 db 99 00 00 48 81 c3 80 17 00 00 48 89 df 5b 41 5c 41 5e 41 5f 5d e9 54 ba 00 00 e8 bf b6 d6 f6 90 <0f> 0b 90 4c 8d bb a0 09 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00
RSP: 0018:ffffc900040df390 EFLAGS: 00010293
RAX: ffffffff8ae8cce1 RBX: ffff888038ab8d80 RCX: ffff888027048000
RDX: 0000000000000000 RSI: 00000000ffffff9f RDI: ffff888038ab8d80
RBP: ffffc900040df530 R08: ffffffff8fa1ba37 R09: 1ffffffff1f43746
R10: dffffc0000000000 R11: ffffffff8ae92c70 R12: dffffc0000000000
R13: ffff888038ab8c10 R14: ffff888038ab9978 R15: ffff888038ab8000
FS:  0000000000000000(0000) GS:ffff888125c5b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa038adcf98 CR3: 000000003edb8000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 unregister_netdevice_many_notify+0x1953/0x1ff0 net/core/dev.c:12177
 unregister_netdevice_many net/core/dev.c:12219 [inline]
 unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12063
 unregister_netdevice include/linux/netdevice.h:3382 [inline]
 _cfg80211_unregister_wdev+0x165/0x590 net/wireless/core.c:1275
 ieee80211_remove_interfaces+0x49a/0x6d0 net/mac80211/iface.c:2391
 ieee80211_unregister_hw+0x5d/0x2c0 net/mac80211/main.c:1664
 mac80211_hwsim_del_radio+0x275/0x460 drivers/net/wireless/virtual/mac80211_hwsim.c:5674
 hwsim_exit_net+0x584/0x640 drivers/net/wireless/virtual/mac80211_hwsim.c:6554
 ops_exit_list net/core/net_namespace.c:198 [inline]
 ops_undo_list+0x49a/0x990 net/core/net_namespace.c:251
 cleanup_net+0x4c5/0x800 net/core/net_namespace.c:682
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 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>


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup