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Re: [PATCH] - improve sprintf buffer overflow detection (middle-end/49905)

From: Joseph Myers <joseph at codesourcery dot com>
To: Martin Sebor <msebor at gmail dot com>
Cc: Jeff Law <law at redhat dot com>, Richard Biener <rguenther at suse dot de>, Gcc Patch List <gcc-patches at gcc dot gnu dot org>, Jakub Jelinek <jakub at redhat dot com>, Bernd Schmidt <bschmidt at redhat dot com>, David Malcolm <dmalcolm at redhat dot com>, Manuel López-Ibáñez <lopezibanez at gmail dot com>, Florian Weimer <fweimer at redhat dot com>
Date: Thu, 25 Aug 2016 23:02:23 +0000
Subject: Re: [PATCH] - improve sprintf buffer overflow detection (middle-end/49905)
Authentication-results: sourceware.org; auth=none
References: <5776B33E.2080504@gmail.com> <alpine.LSU.2.11.1607041255060.29772@t29.fhfr.qr> <577A8D6A.3070902@gmail.com> <alpine.LSU.2.11.1607051208470.29772@t29.fhfr.qr> <578D512F.9050909@gmail.com> <9bb5ad66-4985-8c42-f800-4d84e0e18659@redhat.com> <57A3AFFF.7090109@gmail.com> <f3d09350-de5d-a0e4-8203-affac268ced2@redhat.com> <57AD30E5.3000801@gmail.com> <22a47656-c23c-4840-2e49-a59f4af513b1@redhat.com> <57B725F6.8000405@gmail.com> <110cfc6b-7856-9b51-885f-05402b14fc3e@redhat.com> <57BCC6A4.3050004@gmail.com> <alpine.DEB.2.20.1608232250420.1642@digraph.polyomino.org.uk> <57BDCE16.6010000@gmail.com> <alpine.DEB.2.20.1608242155100.10883@digraph.polyomino.org.uk> <57BE28FF.6030600@gmail.com>

On Wed, 24 Aug 2016, Martin Sebor wrote:

> Since it's presumably a Glibc bug (bug 2509?) is this something
> you believe the optimization needs to worry about?  If so, can
> you confirm that only Glibc versions 2.4 and prior are affected
> and 2.5 is not?

The code may not need to care about it, but the assumptions need to be 
made clear.  I haven't tried to confirm which glibc versions had an issue 
here.

-- 
Joseph S. Myers
joseph@codesourcery.com

References:
- Re: [PATCH] - improve sprintf buffer overflow detection (middle-end/49905)
  - From: Martin Sebor
- Re: [PATCH] - improve sprintf buffer overflow detection (middle-end/49905)
  - From: Jeff Law
- Re: [PATCH] - improve sprintf buffer overflow detection (middle-end/49905)
  - From: Martin Sebor
- Re: [PATCH] - improve sprintf buffer overflow detection (middle-end/49905)
  - From: Jeff Law
- Re: [PATCH] - improve sprintf buffer overflow detection (middle-end/49905)
  - From: Martin Sebor
- Re: [PATCH] - improve sprintf buffer overflow detection (middle-end/49905)
  - From: Jeff Law
- Re: [PATCH] - improve sprintf buffer overflow detection (middle-end/49905)
  - From: Martin Sebor
- Re: [PATCH] - improve sprintf buffer overflow detection (middle-end/49905)
  - From: Joseph Myers
- Re: [PATCH] - improve sprintf buffer overflow detection (middle-end/49905)
  - From: Martin Sebor
- Re: [PATCH] - improve sprintf buffer overflow detection (middle-end/49905)
  - From: Joseph Myers
- Re: [PATCH] - improve sprintf buffer overflow detection (middle-end/49905)
  - From: Martin Sebor

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