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SubjectRe: [PATCH] bogus sigaltstack calls by rt_sigreturn
> 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().

The patch I sent doesn't just avoid the bogus access, it implements the
feature properly.
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