Multiple Unlocks of a Critical Resource
The product unlocks a critical resource more times than intended, leading to an unexpected state in the system.
When the product is operating in a concurrent environment and repeatedly unlocks a critical resource, the consequences will vary based on the type of lock, the lock's implementation, and the resource being protected. In some situations such as with semaphores, the resources are pooled and extra calls to unlock will increase the count for the number of available resources, likely resulting in a crash or unpredictable behavior when the system nears capacity.
Weaknesses in this category are related to concurrency.
This category identifies Software Fault Patterns (SFPs) within the Multiple Locks/Unlocks cluster (SFP21).
Weaknesses in this category are related to improper handling of locks that are used to control access to resources.
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This view (slice) lists weaknesses that can be introduced during implementation.