linux-kernel - Re: [PATCH] linux/bits.h: Add compile time sanity check of GENMASK inputs

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 linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

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

Date:   Sat, 3 Aug 2019 12:12:46 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Rikard Falkeborn <rikard.falkeborn@...il.com>
Cc:     Joe Perches <joe@...ches.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Johannes Berg <johannes@...solutions.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] linux/bits.h: Add compile time sanity check of GENMASK inputs

On Sat, Aug 3, 2019 at 12:03 PM Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:

>
> BTW, v2 is already inconsistent.
> If you wanted GENMASK_INPUT_CHECK() to return 'unsigned long',,
> you would have to cast (low) > (high) as well:
>
>                (unsigned long)((low) > (high)), UL(0))))
>
> This is totally redundant, and weird.

I take back this comment.
You added (unsigned long) to the beginning of this macro.
So, the type is consistent, but I believe all casts should be removed.


-- 
Best Regards
Masahiro Yamada