netdev - Re: Posible memory corruption from "mac80211: do not accept/forward invalid EAPOL frames"

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Message-ID: <YOk/QNc0X71cF6Id@kroah.com>
Date:   Sat, 10 Jul 2021 08:33:36 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Davis Mosenkovs <davikovs@...il.com>
Cc:     Johannes Berg <johannes@...solutions.net>,
        Felix Fietkau <nbd@....name>, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: Posible memory corruption from "mac80211: do not accept/forward
 invalid EAPOL frames"

On Fri, Jul 09, 2021 at 10:48:06PM +0300, Davis Mosenkovs wrote:
> On 2021-07-02 at 09:54 Johannes Berg (<johannes@...solutions.net>) wrote:
> >
> > > If testing procedure mentioned in my first email is sufficient (and
> > > using skb->data is the correct solution in kernel trees where current
> > > code doesn't work properly), I can make and test the patches.
> > > Should I do that?
> >
> > Yes, please do.
> >
> > Thanks,
> > johannes
> >
> I have done the testing on kernel versions 4.4.274, 4.9.274, 4.14.238,
> 4.19.196, 5.4.130, 5.10.48, 5.12.15 and 5.13.1.
> Only kernels 4.4.274, 4.9.274 and 4.14.238 are affected.
> On kernels 4.19.196, 5.4.130, 5.10.48, 5.12.15 and 5.13.1 current code
> works properly (and skb->data produces incorrect pointer when used
> instead of skb_mac_header()).
> I have submitted patches for the affected kernel versions:
> https://lore.kernel.org/r/20210707213800.1087974-1-davis@mosenkovs.lv
> https://lore.kernel.org/r/20210707213820.1088026-1-davis@mosenkovs.lv
> https://lore.kernel.org/r/20210707213834.1088078-1-davis@mosenkovs.lv

Please resend and cc: the stable@...r.kernel.org list so these can
actually be applied.

You have read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
right?

thanks,

greg k-h