CWE-765 关键资源的多重解锁

Multiple Unlocks of a Critical Resource

结构: Simple

Abstraction: Base

状态: Incomplete

被利用可能性: unkown

基本描述

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

扩展描述

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.

相关缺陷

• cwe_Nature: ChildOf cwe_CWE_ID: 667 cwe_View_ID: 1000 cwe_Ordinal: Primary

• cwe_Nature: ChildOf cwe_CWE_ID: 667 cwe_View_ID: 699 cwe_Ordinal: Primary

• cwe_Nature: ChildOf cwe_CWE_ID: 675 cwe_View_ID: 1000

常见的影响

可能的缓解方案

Implementation

策略:

When locking and unlocking a resource, try to be sure that all control paths through the code in which the resource is locked one or more times correspond to exactly as many unlocks. If the software acquires a lock and then determines it is not able to perform its intended behavior, be sure to release the lock(s) before waiting for conditions to improve. Reacquire the lock(s) before trying again.

分析过的案例

Notes

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