why would i get "Out of memory" error in a sandbox build?

[Robert P. J. Day]

On Thu, 3 Jul 2014, Sascha Hauer wrote:

> On Wed, Jul 02, 2014 at 03:50:36PM -0400, Robert P. J. Day wrote:
> >
> > barebox at barebox sandbox:/
> >
> >   i'm actually good with this, it's about what i expected since i set
> > no environment or networking, etc.  but just for fun, i "cd"ed down
> > into /mnt/tftp, knowing this shouldn't work, and here's what happened:
> >
> > barebox at barebox sandbox:/ cd /mnt/tftp
> > ifup: Cannot find device eth0
> > ifup: No such file or directory
> > running automount command 'ifup eth0 && mount -t tftp $eth0.serverip
> > /mnt/tftp' failed
> > barebox at barebox sandbox:/mnt/tftp cd /
> > ERROR: out of memory
> >
> > no stack data available
> > [rpjday at localhost barebox_build]$
> >
> >   in short, "cd"ing into /mnt/tftp failed as it should have, but just
> > trying to "cd" back to the root caused the "out of memory" error. it
> > seems entirely reproducible. should i have expected this?
>
> This is an interesting bug you triggered. by changing the cwd to an
> automount directory you found a way to trigger the automount function
> from the automount function resulting in an endless loop. This loop
> gets interrupted when we are out of memory.
>
> I sent a fix to the list which fixes this.

  i *swear*, i'm not *trying* to find the most obscure bugs
imaginable. :-)

rday

-- 

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
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