Commits on Mar 8, 2024

1. Fix nil pointer dereference when ClusterGroup/Group is used (antrea-i… …

   …o#6077)
   
   When an AppliedToGroup or AddressGroup is derived from a ClusterGroup or
   Group, we used the existence of the source Group in the internal group
   storage as the indicator of the type of AppliedToGroup or AddressGroup.
   After the source Group is deleted, the AppliedToGroup or AddressGroup
   was considered as a Group with its own selector mistakenly. Accessing
   its selector would panic due to nil pointer dereference.
   
   This patch makes the type of AppliedToGroup and AddressGroup more
   explicit by adding a field "SourceGroup" to indicate it. If the source
   Group can't be found in the storage, we just return nil to indicate the
   Group selects nothing at the moment.
   
   Signed-off-by: Quan Tian <[email protected]>

   

   tnqn committed Mar 8, 2024
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