[7.0] Check if another forked child has already added the vhost. #584
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In some cases, in which expand_vhosts and test_empty_vhost options are enabled, a plugin process fork()s one child for vhost. These children inherit the current state of vhosts list, but it does not check if the concurrent child plugin has already added a new found vhost. Now, it checks not only if the vhost has been added by another plugin before (and already exists in the vhosts list), but also checks if a concurrent child added to the internal/vhosts key in redis.
Like the previous commit, but this check is done at host process level, It does not removes the appended vhosts from internal/vhosts key (get instead pop) So, avoids race condition in which other plugins checks for adding the same vhosts, and they have an outdated vhosts list.
jjnicola
approved these changes
Aug 20, 2020
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Backport of #581 to the openvas-7.0 branch.