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Conversions between integers and pointers can have undesired consequences depending on the implementation.
According to the to the C Standard, subclause 6.3.2.3 3 [ISO/IEC 9899:20112024],
An integer may be converted to any pointer type. Except as previously specified, the result is implementation-defined, might not be correctly aligned, might not point to an entity of the referenced type, and might be a trap representation.
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Tool | Version | Checker | Description | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Astrée |
| pointer-integral-cast pointer-integral-cast-implicit function-pointer-integer-cast function-pointer-integer-cast-implicit | Fully checked | ||||||||||||||||
| Axivion Bauhaus Suite |
| CertC-INT36 | Fully implemented | ||||||||||||||||
| Clang |
| -Wint-to-pointer-cast, -Wint-conversion | Can detect some instances of this rule, but does not detect all | ||||||||||||||||
| CodeSonar |
| LANG.CAST.PC.CONST2PTR LANG.CAST.PC.INT | Conversion: integer constant to pointer Conversion: pointer/integer | ||||||||||||||||
| Compass/ROSE | |||||||||||||||||||
| Coverity |
| PW.POINTER_CONVERSION_LOSES_BITS | Fully implemented | ||||||||||||||||
| Cppcheck Premium |
| premium-cert-int36-c | Partially implemented | ||||||||||||||||
| Helix QAC |
| C0303, C0305, C0306, C0309, C0324, C0326, C0360, C0361, C0362 C++3040, C++3041, C++3042, C++3043, C++3044, C++3045, C++3046, C++3047, C++3048 | |||||||||||||||||
| Klocwork |
| MISRA.CAST.OBJ_PTR_TO_INT.2012 | |||||||||||||||||
| LDRA tool suite |
| 439 S, 440 S | Fully implemented | ||||||||||||||||
| Parasoft C/C++test |
| CERT_C-INT36-b | A conversion should not be performed between a pointer to object type and an integer type other than 'uintptr_t' or 'intptr_t' | ||||||||||||||||
| PC-lint Plus |
| 4287 | Partially supported: reports casts from pointer types to smaller integer types which lose information | ||||||||||||||||
| Polyspace Bug Finder |
| Checks for unsafe conversion between pointer and integer (rule partially covered) | PRQA QA-C | | Include Page | | PRQA QA-C_v | PRQA QA-C_v0303, 0305, 0306, 0309, 0324, 0326, 0360, 0361, 0362 | Partially implemented | PRQA QA-C++ | ||||||||||
| Include Page | cplusplus:PRQA QA-C++_V | cplusplus:PRQA QA-C++_V | |||||||||||||||||
3040, 3041, 3042, 3043, 3044, 3045, 3046, 3047, 3048 | PVS-Studio |
| V527, V528, V542, V566, V601, V647, V1091 | ||||||||||||||||
| RuleChecker |
| pointer-integral-cast pointer-integral-cast-implicit function-pointer-integer-cast function-pointer-integer-cast-implicit | Fully checked | ||||||||||||||||
| SonarQube C/C++ Plugin |
| S1767 | Partially implemented |
Related Vulnerabilities
Search for vulnerabilities resulting from the violation of this rule on the CERT website.
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Bibliography
| [ISO/IEC 9899:20112024] | 6.3.2.3, "Pointers" |
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