Re: [PATCH v2] wifi: mac80211: fix the issue of NULL pointer access when deleting the virtual interface

[傅继晗 <fjhhz1997@gmail.com>]

Hi Óscar,

Lucid-Duck spent some time trying to reproduce your crash and wasn't able
to trigger it. Here's a summary of what was tested:

- Kali 2025.4 (kernel 6.18.12+kali-amd64) VM on QEMU/KVM, with my v2
  patch applied
- MT7921AU USB adapter, passthrough to VM
- Full airgeddon evil twin flow: monitor VIF + hostapd AP + continuous
  deauth via aireplay-ng
- Also tested on bare metal Fedora 6.19.8 with the same adapter

All tests were stable -- no crash, no dmesg errors, load stayed low. The
deauth frames were confirmed sending for 30+ seconds under the v2 patch
without issues.

The one variable that couldn't be matched was the VM hypervisor.
Lucid-Duck used QEMU/KVM, which handles USB passthrough at the kernel
level (xHCI). If you're using VirtualBox or VMware, the USB passthrough
path is quite different (userspace proxy), and that could potentially
explain a total VM freeze that isn't a kernel panic.

Could you please reply to Lucid-Duck directly on GitHub with the
following information? Here's the link:
https://github.com/morrownr/USB-WiFi/issues/682#issuecomment-4129198757

1. Which hypervisor are you using? (VirtualBox, VMware, QEMU/KVM, etc.)
2. Your exact USB adapter model and ID? (0e8d:7961 covers several
   MT7921 variants)
3. If possible, try SSHing into the VM from the host while the display
   is frozen -- if SSH still works, the issue is at the hypervisor/display
   level, not the kernel.

Thanks,
傅继晗