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

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Date:	Wed, 14 Feb 2007 21:51:23 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Blaisorblade <blaisorblade@...oo.it>
Cc:	user-mode-linux-devel@...ts.sourceforge.net,
	Jeff Dike <jdike@...toit.com>,
	Andrew Morton <akpm@...ux-foundation.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 Thu, 15 Feb 2007 04:43:41 +0100 Blaisorblade <blaisorblade@...oo.it> wrote:

> > 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.

Whatever happens, please ensure that the final fix makes it into -stable
as well.  Jeff's version of this patch wasn't cc'ed to stable@...nel.org.
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