Re: CVE request: kernel: pipe_fcntl local DoS

[Josh Bressers <bressers () redhat com>]

Please use CVE-2010-4256

Thanks.

-- 
    JB


----- "Eugene Teo" <eugene () redhat com> 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.
>
> http://git.kernel.org/linus/71993e62a47dabddf10302807d6aa260455503f4
> http://git.kernel.org/linus/c66fb347946ebdd5b10908866ecc9fa05ee2cf3d
>
> Introduced in v2.6.35-rc1
>
> Thanks, Eugene