Multiple Unlocks of a Critical Resource

The software unlocks a critical resource more times than intended, leading to an unexpected state in the system.


Description

When software 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.

See Also

SFP Secondary Cluster: Multiple Locks/Unlocks

This category identifies Software Fault Patterns (SFPs) within the Multiple Locks/Unlocks cluster (SFP21).

Resource Locking Problems

Weaknesses in this category are related to improper handling of locks that are used to control access to resources.

Comprehensive CWE Dictionary

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Weaknesses Introduced During Implementation

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