linux-kernel - Re: [PATCH v3 0/6] staging: r8188eu: avoid uninit value bugs

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Date:   Fri, 27 Aug 2021 10:52:59 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     Kari Argillander <kari.argillander@...il.com>
Cc:     Larry.Finger@...inger.net, phil@...lpotter.co.uk,
        gregkh@...uxfoundation.org, straube.linux@...il.com,
        fmdefrancesco@...il.com, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/6] staging: r8188eu: avoid uninit value bugs

On 8/27/21 10:49 AM, Kari Argillander wrote:
> On Tue, Aug 24, 2021 at 10:25:45AM +0300, Pavel Skripkin wrote:
>> Hi, Greg, Larry and Phillip!
>> 
>> I noticed, that new staging driver was added like 3 weeks ago and I decided
>> to look at the code, because drivers in staging directory are always buggy.
>> 
>> The first thing I noticed is *no one* was checking read operations result, but
>> it can fail and driver may start writing random stack values into registers. It
>> can cause driver misbehavior or device misbehavior.
>> 
>> To avoid this type of bugs, i've changed rtw_read* API. Now all rtw_read
>> funtions return an error, when something went wrong with usb transfer.
>> 
>> It helps callers to break/return earlier and don't write random values to
>> registers or to rely on random values.
>> 
>> 
>> v2 -> v3:
> 
> Hi Pavel.
> 
> If v4 is needed can you please send it without replying to old message.
> This thread is so hard to follow because always new version is answer to
> old subject. This depens a little bit how you setup your email, but some
> of us is grouping all emails in same thread and this thread is out of
> control :D
> 

Hi, Kari!

v4 will be posted soon, yep. I will post v4 as separate thread :) It's 
unreal to follow the discussion for sure. I often spend about a minute 
to find an actual mail to reply xd




With regards,
Pavel Skripkin