linux-kernel - Re: capget() overflows buffers.

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Date:	Fri, 23 May 2008 14:01:46 +1000
From:	Bojan Smojver <bojan@...ursive.com>
To:	Chris Wright <chrisw@...s-sol.org>
Cc:	Dave Jones <davej@...emonkey.org.uk>,
	Andrew Morgan <morgan@...nel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: capget() overflows buffers.

On Thu, 2008-05-22 at 19:06 -0700, Chris Wright wrote:

> 1) switch to using the libcap interface, arguably the best sol'n since
> you know longer have to directly care about the kernel interface.
> only drawback is the additional library dependency.

I'm thinking Squid folks may want to pick this up long term.

> 2) force head->version to the older version, something like:
> 
> #ifdef  _LINUX_CAPABILITY_VERSION_1
>   head->version = _LINUX_CAPABILITY_VERSION_1;
> #else
>   head->version = _LINUX_CAPABILITY_VERSION;
> #endif
> 
> this has the drawback of always using the older 32bit caps, probably
> fine here, since you're not using new caps.

Probably the best short term suggestion. I will post this in my original
bug report.

Thank you for your suggestions!

-- 
Bojan

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