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[libvirt] [PATCHv2 0/3] util: capabilities detection for dnsmasq



This patch series resolves the libvirt part of CVE 2012-3411:

   https://bugzilla.redhat.com/show_bug.cgi?id=833033

Further details are in PATCH 3/3.

The changes from V1 are all in PATCH 1/3 (resulting from Doug
Goldstein's review):

1) rework dnsmasqCapsRefresh() to create a new caps object if it's
   given a NULL object (function now gets dnsmasqCapsPtr* instead of
   dnsmasCapsPtr). This makes it possible to recover properly if dnsmasq
   is installed after libvirtd has already been started.

2) Add the following before each run of dnsmasq:

    virCommandAddEnvPassCommon(cmd);
    virCommandClearCaps(cmd);

3) Fixed a missing space after comma :-)


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