svn commit: r250890 - head/sys/kern

[Gleb Smirnoff]

On Tue, May 21, 2013 at 09:58:01PM +0000, Mateusz Guzik wrote:
M> Author: mjg
M> Date: Tue May 21 21:58:00 2013
M> New Revision: 250890
M> URL: http://svnweb.freebsd.org/changeset/base/250890
M> 
M> Log:
M>   passing fd over unix socket: fix a corner case where caller
M>   wants to pass no descriptors.
M>   
M>   Previously the kernel would leak memory and try to free a potentially
M>   arbitrary pointer.
M>   
M>   Reviewed by:	pjd

Is it possible to make code more strict: assert that fdcount > 0, and
do not perform any processing if number of fds is 0?

Prototype patch against r250890 attached.

-- 
Totus tuus, Glebius.
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