linux-kernel - Re: [uml-devel] x86_64: fix 2.6.18 regression - PTRACE

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Message-Id: <200702150443.42287.blaisorblade@yahoo.it>
Date:	Thu, 15 Feb 2007 04:43:41 +0100
From:	Blaisorblade <blaisorblade@...oo.it>
To:	user-mode-linux-devel@...ts.sourceforge.net
Cc:	Jeff Dike <jdike@...toit.com>, Andrew Morton <akpm@...l.org>,
	linux-kernel@...r.kernel.org, Andi Kleen <ak@...e.de>,
	stable@...nel.org
Subject: Re: [uml-devel] x86_64: fix 2.6.18 regression - PTRACE_OLDSETOPTIONS should be accepted

On Thursday 15 February 2007 03:54, Jeff Dike wrote:
> On Thu, Feb 15, 2007 at 03:34:23AM +0100, Paolo 'Blaisorblade' Giarrusso 
wrote:
> > Index: linux-2.6.git/arch/x86_64/ia32/ptrace32.c
> > ===================================================================
> > --- linux-2.6.git.orig/arch/x86_64/ia32/ptrace32.c
> > +++ linux-2.6.git/arch/x86_64/ia32/ptrace32.c
> > @@ -246,6 +246,7 @@ asmlinkage long sys32_ptrace(long reques
> >  	case PTRACE_SINGLESTEP:
> >  	case PTRACE_DETACH:
> >  	case PTRACE_SYSCALL:
> > +	case PTRACE_OLDSETOPTIONS:
> >  	case PTRACE_SETOPTIONS:
> >  	case PTRACE_SET_THREAD_AREA:
> >  	case PTRACE_GET_THREAD_AREA:
>
> I sent an equivalent patch in earlier today:
Doh! Interesting this timing...

> Index: linux-2.6/arch/x86_64/ia32/ptrace32.c
> ===================================================================
> --- linux-2.6.orig/arch/x86_64/ia32/ptrace32.c
> +++ linux-2.6/arch/x86_64/ia32/ptrace32.c
> @@ -239,6 +239,8 @@ asmlinkage long sys32_ptrace(long reques
>  	__u32 val;
>
>  	switch (request) {
> +	case PTRACE_OLDSETOPTIONS:
> +		request = PTRACE_SETOPTIONS;
>  	case PTRACE_TRACEME:
>  	case PTRACE_ATTACH:
>  	case PTRACE_KILL:
>
> I change the request so that PTRACE_OLDSETOPTIONS doesn't need to
> propogate any further.  However, it is present in include/asm-x86_64,
> so I guess that counts as being part of the x86_64 ABI.  That being
> the case, I guess my patch can be dropped in favor of this one.

It is handled in ptrace_request, unless there are include problems. I'm going 
to reboot and test mine for any remaining problem.
-- 
Inform me of my mistakes, so I can add them to my list!
Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisorblade
Chiacchiera con i tuoi amici in tempo reale! 
 http://it.yahoo.com/mail_it/foot/*http://it.messenger.yahoo.com 
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