Bish,

check out https://bugzilla.redhat.com/show_bug.cgi?id=1319858

(particularly the way the reporter closed the bug at the very end --
after I already applied the out-of-tree patch, out of "an excess of
caution" :)

If the links in the closing message confirm your suspicion (that this
is an unlikely thing to become a *real* problem), that's OK with me.
This all happened after I had originally emailed you, and meanwhile
$DAYJOB caught up with me and I stopped closely following the issue...

I'd be happy to upgrade to 3.0.4 and drop all current "aftermarket"
patches when you finally get around to doing a release.

Thanks again for following up,
--Gabe

On Sat, Sep 17, 2016 at 04:48:33PM -0400, bishop wrote:
> Hi Gabriel,
> 
> Any DOS implications are due to some loop in the client() code or the
> calling init scaffolding.  The #FridgeArt isn't that robust, but let's
> assume it's in the client() routine instead.  The log messages - really,
> anything at all - would be a huge help.
> 
> I'm looking at the patch, and I'm not sure it's not killing the persist
> behaviour.
> 
> Have you seen this happen on a stock+systemd vtun install?  I'm worried
> that the behaviour's restricted to some code hack that's not present on
> the upstream.
> 
> Toss me a link to the project on fedora?  I'd like to know more before
> 304 goes out.
> 
>  - bish
> 
> 
> 
> > Hi,
> > 
> > I maintain the vtun package in Fedora, and I just had a bug
> > opened against it (with potential security implications), pointing
> > at the following Debian bug report:
> > 
> > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=818489
> > 
> > Allegedly, under certain conditions, sending a SIGHUP to a client-mode
> > vtund process can peg the CPU, and generate large amounts of log data
> > (which is where the security angle comes from, I think).
> > 
> > The Debian link above contains a patch as well.
> > 
> > Is this something that could/should be applied upstream
> > (i.e., in sourceforge CVS) ?
> > 
> > Thanks much,
> > --Gabriel
> > 

> pub  1024D/B6187995 2008-07-25 Bishop (LC957) <bis...@platypus.bc.ca>
> uid                            Bishop Clark (hpas) <bishop.cl...@hpas.ca>
> uid                            Bishop Clark <bishopo...@gmail.com>
> uid                            Bishop Clark <bishop.cl...@gmail.com>
> uid                            Bishop Clark (old work) 
> <bishop.cl...@hpadvancedsolutions.com>
> uid                            Bishop Clark (old work) <bishop.cl...@hpas.ca>
> uid                            Bishop Clark (old work) 
> <bcl...@halogensoftware.com>
> uid                            Bishop Clark (old work) 
> <bishop.cl...@gov.bc.ca>
> uid                            Bishop Clark (work) 
> <bishop.cl...@hpadvancedsolutions.com>
> uid                            Bishop Clark (old work) <bish...@sco.com>
> sub  1024g/F0E863B7 2008-07-25 [expires: 2018-06-11]
> sub  4096R/0DF6635B 2016-08-27 [expires: 2021-08-26]
> sub  4096R/400FB98C 2016-08-27 [expires: 2021-08-26]


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