linux-kernel - Re: [PATCH] Fix msr check in compat_sys

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Date:	Thu, 6 Nov 2008 21:36:37 +1100
From:	Paul Mackerras <paulus@...ba.org>
To:	Andreas Schwab <schwab@...e.de>
Cc:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix msr check in compat_sys_swapcontext

Andreas Schwab writes:

> Paul Mackerras <paulus@...ba.org> writes:
> 
> > we need to use get_user, not __get_user, since we haven't done an
> > access_ok() check on the address.
> 
> The address is always ok since its a compat pointer, see do_setcontext.

OK, since it's inside a CONFIG_PPC64 block.  I'll add a paragraph to
the patch description pointing that out.

Paul.
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