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• a return value (especially of type errno_t)
• an argument passed by address
• a global object (e.g., errno)
• longjmp()
• some combination of the above

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• Source code still becomes larger, though smaller than the previous examples.
• All error indicators must be checked after calling functions.
• A function that allocates resources must still free them in spite of the error.
• In general, combining registries of different sets of errors is difficult. For example, changing the above code to use errno is difficult and bug-prone; as one must be precisely aware of when C library functions set and clear errno, and one must be aware of all valid errno values before adding new ones.

• longjmp()

Compliant Solution ( setjmp() and longjmp() )

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Related Vulnerabilities

Search for vulnerabilities resulting from the violation of this rule on the CERT website.

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