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From: Denis Kenzior <denkenz@gmail.com>
To: James Bottomley <jejb@linux.ibm.com>,
	ndesaulniers@google.com, dhowells@redhat.com
Cc: natechancellor@gmail.com, ebiggers@google.com,
	Mimi Zohar <zohar@linux.vnet.ibm.com>,
	James Morris <jmorris@namei.org>,
	"Serge E. Hallyn" <serge@hallyn.com>,
	linux-integrity@vger.kernel.org, keyrings@vger.kernel.org,
	linux-security-module@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] KEYS: trusted: fix -Wvarags warning
Date: Fri, 12 Oct 2018 10:13:56 -0500	[thread overview]
Message-ID: <fc23168b-7275-bae0-6039-04e261b3cbad@gmail.com> (raw)
In-Reply-To: <1539356751.2656.5.camel@linux.ibm.com>

Hi James,

>> So can't we simply use 'bool' or uint32 as the type for h3 instead
>> of re-ordering everything
> 
> The problem is the standard is ambiguious.  The only thing that's
> guaranteed to work for all time is a char *.  If you want to keep the
> order, what I'd suggest is inserting a dummy pointer argument which is
> always expected to be NULL between the h3 and the varargs.

So maybe I'm misunderstanding something, but the issue seems to be that 
unsigned char is promoted to 'unsigned char *' by Clang and probably 
unsigned int or int by gcc.

So instead of having unsigned char h3, can't we simply have bool h3 or 
unsigned int h3?

Regards,
-Denis


  reply	other threads:[~2018-10-12 15:14 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-09 22:11 undefined behavior (-Wvarargs) in security/keys/trusted.c#TSS_authhmac() Nick Desaulniers
2018-10-11 16:02 ` Arnd Bergmann
2018-10-11 16:10   ` James Bottomley
2018-10-11 20:31     ` [PATCH] KEYS: trusted: fix -Wvarags warning ndesaulniers
2018-10-12  1:50       ` Nathan Chancellor
2018-10-12 16:55         ` Nick Desaulniers
2018-10-12 17:03           ` Nathan Chancellor
2018-10-12 12:29       ` Denis Kenzior
2018-10-12 15:05         ` James Bottomley
2018-10-12 15:13           ` Denis Kenzior [this message]
2018-10-12 15:22             ` James Bottomley
2018-10-12 15:44               ` Denis Kenzior
2018-10-12 15:46                 ` James Bottomley
2018-10-12 15:53                   ` Denis Kenzior
2018-10-12 16:01                     ` James Bottomley
2018-10-12 17:14                       ` Nick Desaulniers
2018-10-12 15:25             ` James Bottomley
2018-10-12 17:05             ` Nick Desaulniers
2018-10-12 17:17               ` Nick Desaulniers
2018-10-12 17:27               ` Denis Kenzior
2018-10-12 18:39                 ` Nick Desaulniers
2018-10-12 17:02         ` Nick Desaulniers
2018-10-12 17:15           ` Denis Kenzior
2018-10-15  9:26       ` David Laight
2018-10-15 21:53         ` Nick Desaulniers
2018-10-16  8:13           ` David Laight
2018-10-22 23:43             ` [PATCH v2] " ndesaulniers
2018-10-23  0:00               ` Nathan Chancellor
2018-10-24  8:36               ` Jarkko Sakkinen
2018-10-29 17:54                 ` Nick Desaulniers
2019-02-11 18:36                   ` Nick Desaulniers
2019-02-12 23:12                     ` Jarkko Sakkinen
2019-02-14 10:52                       ` Jarkko Sakkinen

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