linux-kernel - Re: [patch 27/85] [PATCH 07/44] [CVE-2009-0029] System call wrapper infrastructure

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Message-Id: <200901160944.59773.borntraeger@de.ibm.com>
Date:	Fri, 16 Jan 2009 09:44:59 +0100
From:	Christian Borntraeger <borntraeger@...ibm.com>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	Greg KH <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	stable@...nel.org, Justin Forbes <jmforbes@...uxtx.org>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	"Theodore Ts'o" <tytso@....edu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>,
	Chris Wedgwood <reviews@...cw.f00f.org>,
	Michael Krufky <mkrufky@...uxtv.org>,
	Chuck Ebbert <cebbert@...hat.com>,
	Domenico Andreoli <cavokz@...il.com>, Willy Tarreau <w@....eu>,
	Rodrigo Rubira Branco <rbranco@...checkpoint.com>,
	Jake Edge <jake@....net>, Eugene Teo <eteo@...hat.com>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Ralf Baechle <ralf@...ux-mips.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>
Subject: Re: [patch 27/85] [PATCH 07/44] [CVE-2009-0029] System call wrapper infrastructure

Am Donnerstag 15 Januar 2009 schrieb Jiri Slaby:
> On 01/15/2009 10:59 PM, Greg KH wrote:
> > +
> > +#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
> > +
> > +#define SYSCALL_DEFINE(name) static inline long SYSC_##name
> > +#define SYSCALL_DEFINEx(x, name, ...)                                        
\
> > +     asmlinkage long sys_##name(__SC_DECL##x(__VA_ARGS__));          \
> > +     static inline long SYSC_##name(__SC_DECL##x(__VA_ARGS__));      \
> 
> Hmm, we don't support at least gcc 3.4.6 anymore :/. It seems to be the same 
as in:

I see two possible quick fixes:
-funit-at-a-time will allow these inline constructs (tested with 3.4.6 on i386 
with enabled syscall wrappers. x86_64 already sets this flag)

- dont use attribute __always_inline__ for these inlines but the standard 
inline. The question is, how to convince cpp to not replace inline with 
always_inline
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