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Re: [PATCH] add attribute nonstring

From: Andreas Schwab <schwab at linux-m68k dot org>
To: Joseph Myers <joseph at codesourcery dot com>
Cc: Florian Weimer <fweimer at redhat dot com>, <sellcey at cavium dot com>, Martin Sebor <msebor at gmail dot com>, Paul Eggert <eggert at cs dot ucla dot edu>, GNU C Library <libc-alpha at sourceware dot org>
Date: Tue, 14 Nov 2017 18:55:01 +0100
Subject: Re: [PATCH] add attribute nonstring
Authentication-results: sourceware.org; auth=none
References: <06e1ee69-bb30-ff95-42db-2d4b2d7eba7d@gmail.com> <1510594506.5755.119.camel@cavium.com> <57b536ce-fd7d-aa04-3475-1fd34afaf1be@redhat.com> <alpine.DEB.2.20.1711141704140.2574@digraph.polyomino.org.uk>

On Nov 14 2017, Joseph Myers <joseph@codesourcery.com> wrote:

> On Tue, 14 Nov 2017, Florian Weimer wrote:
>
>> So this means that we should add the nostring attribute and not the length
>> check.
>
> If the name passed is actually longer than this field, is it undefined 
> behavior or not?

The kernel will always zero-terminate the string at IFNAMSIZ-1, see
dev_ifname in net/core/dev_ioctl.c.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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Follow-Ups:
- Re: [PATCH] add attribute nonstring
  - From: Florian Weimer

References:
- Re: [PATCH] add attribute nonstring
  - From: Martin Sebor
- Re: [PATCH] add attribute nonstring
  - From: Steve Ellcey
- Re: [PATCH] add attribute nonstring
  - From: Florian Weimer
- Re: [PATCH] add attribute nonstring
  - From: Joseph Myers

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