Audit for existing casting/nil/panic vulnerabilities

[bufdev]

Example:

openstorage/cluster/manager.go

Line 149 in 8d07329

logrus.Warnf("Failed to initialize %s: %v",

• How are we sure that e.Value is not nil?
• How are we sure that e.Value can be case to ClusterManager?

Both of these should be checked, ie e.Value == nil -> error, clusterManager, ok := e.Value.(ClusterManager)

[jvinod]

agreed, let's find these occurrences and fix them.

[lpabon]

Closing since it has had no update for more than 6 months. Please reopen if needed.