flannel: protect knownSubnets map with mutex to fix data race - #6
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The package-level knownSubnets map is read and written in WatchSubnets without synchronization. Multiple goroutines calling WatchSubnets concurrently would race on this Go map, causing undefined behavior. Add a sync.Mutex to serialize access to the map.
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The package-level knownSubnets map is read and written in WatchSubnets without synchronization. Multiple goroutines calling WatchSubnets concurrently would race on this Go map, causing undefined behavior.
Add a sync.Mutex to serialize access to the map.