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

[Loic Poulain]

On Tue, Sep 2, 2025 at 10:09 AM Johannes Berg <johannes at sipsolutions.net> wrote:
>
> 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,

Good point!

> and even try to delete it anyway afterwards?

It would still trigger the initial issue this patch addresses.

> If it's all zeroes then an attacker can predict it and might
> be able to inject frames into the system that way?

Indeed, will fix that in v2.

Thanks,
Loic