On Fri, 2024-10-25 at 14:22 -0600, Gustavo A. R. Silva wrote:
>
> > > - struct ieee80211_chanctx_conf conf;
> > > -
> > > bool radar_detected;
> > > +
> > > + /* MUST be last - ends in a flexible-array member. */
> > > + struct ieee80211_chanctx_conf conf;
> > > };
> >
> > Oi. That's not just a warnings problem, that's actually a pretty stupid
> > bug, this will surely get used and radar_detected will alias stuff that
> > the driver puts there - at least for drivers using chanctx_data_size,
> > which is a couple: ath9k, iwlmvm, mt792x, rwt89 and hwsim.
> >
> > Could you resend with a description that this is a bugfix and
> >
> > Fixes: bca8bc0399ac ("wifi: mac80211: handle ieee80211_radar_detected() for
> > MLO")
>
> Yeah, I was actually going to mention this commit, as it's the one that
> introduced
> that `bool radar_detected` to the flex struct. However, it wasn't obvious to
> me
> how `struct ieee80211_chanctx_conf conf` could overwrite `radar_detected` as
> I didn't
> see `conf->drv_priv` being accessed through `struct struct
> ieee80211_chanctx_conf`.
You have to look at the drivers, see hwsim_clear_chanctx_magic() for
example; I wonder why hwsim_check_chanctx_magic() never caught this.
> > please? Or I can do it myself I guess, but ...
>
> Sure thing. I can CC stable as well.
Thanks!
No need for stable, it got introduced in 6.12-rc1 only.
johannes
