[PATCH ath-current] wifi: ath10k: Fix connection after GTK rekeying

[Johannes Berg]

On Tue, 2025-09-02 at 10:04 +0200, Loic Poulain wrote:
> It appears that not all hardware/firmware implementations support
> group key deletion correctly, which can lead to connection hangs
> and deauthentication following GTK rekeying (delete and install).
> 
> To avoid this issue, instead of attempting to delete the key using
> the special WMI_CIPHER_NONE value, we now replace the key with an
> invalid (zeroed) value.

Maybe better use a random value, and even try to delete it anyway
afterwards? If it's all zeroes then an attacker can predict it and might
be able to inject frames into the system that way?

johannes