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@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ 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@xxxxxxxxxxxxxxxx. 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
