linux-kernel - Re: [PATCH -mm v2] coredump: extend core dump note section to contain file names of mapped files

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Message-ID: <20120919115016.GA9437@redhat.com>
Date:	Wed, 19 Sep 2012 13:50:16 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Roland McGrath <roland@...k.frob.com>
Cc:	Denys Vlasenko <vda.linux@...glemail.com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Amerigo Wang <amwang@...hat.com>,
	"Jonathan M. Foote" <jmfoote@...t.org>,
	Pedro Alves <palves@...hat.com>
Subject: Re: [PATCH -mm v2] coredump: extend core dump note section to
	contain file names of mapped files

On 09/18, Oleg Nesterov wrote:
>
> Hmm. And I just noticed that 'filename = ""' case does not verify
> there is a room to write a single '\0' :/
> 
> So, afaics you also need
> 
> 	- if (-ENAMETOOLONG)
> 	+ if (-ENAMETOOLONG || !remaining)

No, please ignore.

d_path() always starts with prepend("\0", 1), it should always
return ENAMETOOLONG if !remaining.

Oleg.

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