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To: Roland McGrath <roland@redhat.com>
cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] bogus sigaltstack calls by rt_sigreturn
References: <1YQB7-2XK-7@gated-at.bofh.it>
From: Andi Kleen <ak@muc.de>
Date: Sun, 23 May 2004 14:29:24 +0200
In-Reply-To: <1YQB7-2XK-7@gated-at.bofh.it> (Roland McGrath's message of
 "Sun, 23 May 2004 04:10:06 +0200")
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Roland McGrath <roland@redhat.com> writes:

> There is a longstanding bug in the rt_sigreturn system call.
> This exists in both 2.4 and 2.6, and for almost every platform.

I don't think the patch is really needed on x86-64 because the
kernel address should always return -EFAULT in access_ok().

Too bad, there are definitely some mysterious 32bit signal
failures left, e.g. newer valgrind still doesn't work reliable.

-Andi