** Changed in: neutron
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1362651
Title:
/0 subnet causes dhcp failures
Status in OpenStack Neutron (virtual network service):
Fix Released
Status in OpenStack Security Advisories:
Won't Fix
Bug description:
Neutron allow for creating /0 subnet. This alone does not make a lot
of sense.
It also causes DHCP failures as the agent is not able to start the dnsmasq
process.
Trouble is that the DHCP agent goes into perennial fully resync mode.
This might cause huge delays in setting up DHCP for other subnets, thus
resulting in a potential DoS.
So it might be better to prevent /0 subnets at all.
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