netdev - Re: [PATCH] mac80211: aggregation: Convert timers to use timer

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Message-ID: <CAGXu5jKR1GEGwLdMUC8_Mu93+0ukr5M+TWm1Yk-ECfv37Eg1hQ@mail.gmail.com>
Date:   Wed, 18 Oct 2017 07:17:57 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Johannes Berg <johannes@...solutions.net>
Cc:     linux-wireless <linux-wireless@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Network Development <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mac80211: aggregation: Convert timers to use timer_setup()

On Wed, Oct 18, 2017 at 4:37 AM, Johannes Berg
<johannes@...solutions.net> wrote:
> On Wed, 2017-10-18 at 13:31 +0200, Johannes Berg wrote:
>> On Wed, 2017-10-18 at 12:29 +0200, Johannes Berg wrote:
>>
>> > Anyway, the change here looks correct to me, so I'll apply it and then
>> > perhaps clean up more. I've only changed "u16 tid" to "u8 tid" since
>> > the valid range is 0-15 (in theory, in practice 0-7).

I started with u8 tid, but I saw it cast to u16 and in a few other
places it was u16, so I went with that ultimately.

>> Well, I guess I'm clearly wrong - it's crashing our test suite left and
>> right.
>>
>> I'll dig a little bit, but I don't have much time today, and will be
>> out for a few days starting tomorrow.
>
> Ok, it's pretty obvious - you never initialize the new fields in tid_tx
> (sta and tid), only in tid_rx. Let's see if it passes with that fixed.

Argh, whoops, thanks for working on this.

-Kees

-- 
Kees Cook
Pixel Security