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Date: Tue, 30 Nov 2010 10:50:11 -0500 (EST)
From: Josh Bressers <>
Cc: "Steven M. Christey" <>
Subject: Re: CVE request: kernel: pipe_fcntl local DoS

Please use CVE-2010-4256



----- "Eugene Teo" <> wrote:

> "Export 'get_pipe_info()' to other users
> And in particular, use it in 'pipe_fcntl()'.
> The other pipe functions do not need to use the 'careful' version,
> since 
> they are only ever called for things that are already known to be
> pipes.
> The normal read/write/ioctl functions are called through the file 
> operations structures, so if a file isn't a pipe, they'd never get 
> called.  But pipe_fcntl() is special, and called directly from the 
> generic fcntl code, and needs to use the same careful function that
> the 
> splice code is using."
> In other words, this is a pipe_fcntl local DoS.
> Introduced in v2.6.35-rc1
> Thanks, Eugene

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