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SubjectRe: [PATCH] SGI UV: uv_ptc_proc_write security hole

* Cliff Wickman <cpw@sgi.com> wrote:

> From: Cliff Wickman <cpw@sgi.com>
>
> Someone could write 0 bytes to /proc/sgi_uv/ptc_statistics,
> causing
> optstr[count - 1] = '\0';
> to write to who-knows-where.
>
> (Andi Kleen noticed this need from a patch I sent for
> similar code in the ia64 world (sn2_ptc_proc_write()).)
>
> (count less than zero is not possible here, as count is unsigned)
>
> Diffed against 2.6.26-rc6

applied to tip/x86/uv - thanks Cliff.

Ingo


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