linux-kernel - Re: [PATCH] basic perf support for sparc

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Message-Id: <20090812.110646.239052896.davem@davemloft.net>
Date:	Wed, 12 Aug 2009 11:06:46 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jens.axboe@...cle.com
Cc:	linux-kernel@...r.kernel.org, a.p.zijlstra@...llo.nl,
	fweisbec@...il.com, mingo@...e.hu
Subject: Re: [PATCH] basic perf support for sparc

From: Jens Axboe <jens.axboe@...cle.com>
Date: Thu, 6 Aug 2009 09:02:42 +0200

> On Sun, Aug 02 2009, David Miller wrote:
>> From: Jens Axboe <jens.axboe@...cle.com>
>> Date: Wed, 29 Jul 2009 13:25:10 +0200
>> 
>> > -#define NR_SYSCALLS		327
>> > +#define NR_SYSCALLS		328
>> 
>> When you increase this value, you have to add entries to all of the
>> syscall tables.  The syscall dispatch checks against this as a limit,
>> so if you don't explicitly add an entry to all the tables, it's
>> possible to deref garbage past the end of the table and try to jump to
>> it as a syscall.
> 
> Oops, missed the 32-bit table. Does the below look better?

I'll take a look at this as soon as I can Jens, sorry for taking
so long.
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