Do not cast away a const qualification on an object of pointer type. Casting away the const qualification allows a program to modify the object referred to by the pointer, which may result in undefined behavior. See undefined behavior 64 in Appendix J of the C Standard.
As an illustration, the C Standard [ISO/IEC 9899:2011] .As an illustration, C provides a footnote (Section 6.7.3, para. 4):
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Compass/ROSE |
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| 203 Scastexpr | Fully implemented. | ||||||||||||||
GCC |
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Compass/ROSE |
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| Include Page |
| ECLAIR
| castexpr203 S | Fully implemented. | ||||||||||||
| PRQA QA-C |
| 0311 | Fully implemented. |
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| CERT C++ Secure Coding Standard | EXP35-CPP. Do not cast away a const qualification |
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| ISO/IEC TR 24772 | Pointer casting and pointer type changes [HFC] and Type system [IHN] |
| MISRA-C | Rule 11.5 (required): A cast shall not be performed that removes any const or volatile qualification from the type addressed by a pointer |
| MITRE CWE | CWE-704, Incorrect type conversion or cast |
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