netdev - Re: [PATCH net] net: axienet: fix a signedness bug in probe

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 25 Sep 2019 13:35:07 +0200 (CEST)
From:   David Miller <davem@...emloft.net>
To:     alvaro.gamez@...ent.com
Cc:     dan.carpenter@...cle.com, radhey.shyam.pandey@...inx.com,
        michal.simek@...inx.com, linux@...linux.org.uk,
        netdev@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH net] net: axienet: fix a signedness bug in probe

From: "Alvaro G. M" <alvaro.gamez@...ent.com>
Date: Wed, 25 Sep 2019 13:05:43 +0200

> Hi, Dan
> 
> On Wed, Sep 25, 2019 at 01:59:11PM +0300, Dan Carpenter wrote:
>> The "lp->phy_mode" is an enum but in this context GCC treats it as an
>> unsigned int so the error handling is never triggered.
>> 
>>  		lp->phy_mode = of_get_phy_mode(pdev->dev.of_node);
>> -		if (lp->phy_mode < 0) {
>> +		if ((int)lp->phy_mode < 0) {
> 
> This (almost) exact code appears in a lot of different drivers too,
> so maybe it'd be nice to review them all and apply the same cast if needed?

Or make the thing an int if negative values are never valid 32-bit phy_mode
values anyways.