linux-kernel - Re: [PATCH] KEYS: trusted: fix -Wvarags warning

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

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

Message-ID: <da2a675f-bd2d-a1f3-6a67-5579e75bdb76@gmail.com>
Date:   Fri, 12 Oct 2018 10:53:43 -0500
From:   Denis Kenzior <denkenz@...il.com>
To:     James Bottomley <jejb@...ux.ibm.com>, ndesaulniers@...gle.com,
        dhowells@...hat.com
Cc:     natechancellor@...il.com, ebiggers@...gle.com,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        linux-integrity@...r.kernel.org, keyrings@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KEYS: trusted: fix -Wvarags warning

Hi James,

>>   From the links provided in the patch it seems that one cannot pass
>> char/float/short to va_start().  Fair enough.  So if we make h3 an
>> unsigned int, the issue goes away, no?
> 
> For the current version of clang, yes.  However, if we're fixing this
> for good a char * pointer is the only guaranteed thing because it
> mirrors current use in printf.
> 

All right.  I guess I wasn't aware that non-printf like variadic 
functions are now considered harmful or of the impending crusade against 
them :)

But in the context of this patch, can we please use something less 
invasive than changing all the arguments around?  Promoting h3 to a bool 
(if possible) or int/unsigned int would get my vote.

Regards,
-Denis