[PATCH] wifi: mt76: mt7921: fix null pointer access in mt792x_mac_link_bss_remove

[Bert Karwatzki]

Am Mittwoch, dem 24.07.2024 um 11:36 +0200 schrieb Linux regression tracking
(Thorsten Leemhuis):
>
> On 19.07.24 01:46, sean.wang at kernel.org wrote:
> > From: Sean Wang <sean.wang at mediatek.com>
> >
> > Fix null pointer access in mt792x_mac_link_bss_remove.
> >
> > To prevent null pointer access, we should assign the vif to bss_conf in
> > mt7921_add_interface. This ensures that subsequent operations on the BSS
> > can properly reference the correct vif.
> >
> > [...]
> > > Fixes: 1541d63c5fe2 ("wifi: mt76: mt7925: add
> mt7925_mac_link_bss_remove to remove per-link BSS")
> > Reported-by: Bert Karwatzki <spasswolf at web.de>
> > Closes: https://lore.kernel.org/linux-wireless/2fee61f8c903d02a900ca3188c3742c7effd102e.camel@web.de/#b
> > Signed-off-by: Sean Wang <sean.wang at mediatek.com>
>
> TWIMC, Mike (now CCed) ran into the problem and on bugzilla confirmed
> that this fixes the problem:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=219084
> https://lore.kernel.org/all/CAHbf0-HOS-jdRGvJOBmEgaaox3PDbDSTgnnZkZF9pz37Bmh2iw@mail.gmail.com/
>
> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
> --
> Everything you wanna know about Linux kernel regression tracking:
> https://linux-regtracking.leemhuis.info/about/#tldr
> If I did something stupid, please tell me, as explained on that page.

Unfortunately this NULL pointer dereference made it into linux-6.11-rc1.

Bert Karwatzki