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Re: [PATCH v2] libio: use PTR_MANGLE/PTR_DEMANGLE for FILE vtables
- From: Kees Cook <keescook at chromium dot org>
- To: Joseph Myers <joseph at codesourcery dot com>
- Cc: Florian Weimer <fweimer at redhat dot com>, libc-alpha <libc-alpha at sourceware dot org>, Mike Frysinger <vapier at gentoo dot org>, Adam Conrad <adconrad at 0c3 dot net>
- Date: Thu, 1 Oct 2015 14:15:25 -0700
- Subject: Re: [PATCH v2] libio: use PTR_MANGLE/PTR_DEMANGLE for FILE vtables
- Authentication-results: sourceware.org; auth=none
- References: <20151001184048 dot GA31563 at www dot outflux dot net> <560D8108 dot 6060802 at redhat dot com> <alpine dot DEB dot 2 dot 10 dot 1510012059180 dot 9824 at digraph dot polyomino dot org dot uk>
On Thu, Oct 1, 2015 at 2:00 PM, Joseph Myers <joseph@codesourcery.com> wrote:
> On Thu, 1 Oct 2015, Florian Weimer wrote:
>
>> Even better, if we can grab a few old binaries and they do not run on
>> current systems for other libstdc++-related reasons (or perhaps we
>
> The libstdc++ SONAME changed in GCC 3.4, so any relevant binaries will be
> using an old libstdc++ shared library (or possibly statically linked with
> libstdc++ but dynamically linked with libc).
So system without ancient static binaries and no libstdc++-v3 or
earlier should be safe for this change? When did v4 happen? Seems like
a long time ago?
-Kees
--
Kees Cook
Chrome OS Security