linux-kernel - Re: [PATCH V2] staging: rtl8192e: Fix signedness bug in rtllib_rx_assoc

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Date:   Fri, 15 Apr 2022 08:31:16 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     "Fabio M. De Francesco" <fmdefrancesco@...il.com>
Cc:     gregkh@...uxfoundation.org, davem@...emloft.net, len.baker@....com,
        dave@...olabs.net, edumazet@...gle.com,
        Haowen Bai <baihaowen@...zu.com>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2] staging: rtl8192e: Fix signedness bug in
 rtllib_rx_assoc_resp()

On Fri, Apr 15, 2022 at 07:22:36AM +0200, Fabio M. De Francesco wrote:
> On venerdì 15 aprile 2022 04:09:31 CEST Haowen Bai wrote:
> > function rtllib_rx_assoc_resp () unsigned errcode receive auth_parse()'s
> > errcode -ENOMEM.
> > 
> > Signed-off-by: Haowen Bai <baihaowen@...zu.com>
> > ---
> > V1->V2: reduce return random value; print its own error message.
> > 
> >  drivers/staging/rtl8192e/rtllib_softmac.c | 12 ++++++------
> >  1 file changed, 6 insertions(+), 6 deletions(-)
> > 
> 
> > [snip]
> 
> It looks like you are doing too many things and that those aren't even 
> discussed in your commit message.
> 

Nope.  The patch is one thing, but maybe it could be described better.
Here is my proposed commit message:

"The rtllib_rx_assoc_resp() function has a signedness bug because it's
a declared as a u16 but it return -ENOMEM.  When you look at it more
closely it returns a mix of error codes including 0xcafe, -ENOMEM, and
a->status which is WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG.  This is a mess.

Clean it up to just return standard kernel error codes.  We can print
out the a->status before returning a regular error code.  The printks
in the caller need to be adjusted as well."

regards,
dan carpenter