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CodeSonar® 9.2p0 CONFIDENTIAL CodeSecure Inc
C and C++
Binaries

BADFUNC.ATOL : Use of atol

Summary

A use of atol(), which has undefined behavior on failure.

Properties

Class Name Use of atol
Significance style
Mnemonic BADFUNC.ATOL
Categories
MisraC2025 MisraC2025:21.7 The Standard Library functions atof, atoi, atol and atoll of <stdlib.h> shall not be used
MisraC2023 MisraC2023:21.7 The atof, atoi, atol and atoll functions of <stdlib.h> shall not be used
Misra2012 Misra2012:21.7 The atof, atoi, atol and atoll functions of <stdlib.h> shall not be used
Misra2004 Misra2004:20.10 The library functions atof, atoi and atol from library <stdlib.h> shall not be used
AUTOSARC++14 AUTOSARC++14:A18-0-2 The error state of a conversion from string to a numeric value shall be checked.
MisraC++2008 MisraC++2008:18-0-2 The library functions atof, atoi and atol from library <cstdlib> shall not be used.
MisraC++2023 MisraC++2023:21.2.1 The library functions atof, atoi, atol and atoll from <cstdlib> shall not be used
CWE CWE:676 Use of Potentially Dangerous Function
  CWE:758 Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
CERT-C CERT-C:ERR34-C Detect errors when converting a string to a number
CERT-CPP CERT-CPP:ERR62-CPP Detect errors when converting a string to a number
JSF++ JSF++:23 The library functions atof, atoi and atol from library <stdlib.h> shall not be used.
OWASP-2021 OWASP-2021:A4 Insecure design
OWASP-2025 OWASP-2025:A06 Insecure Design
Availability Available for C and C++.
Enabling Checks for this warning class are disabled by default. To enable them, add the following WARNING_FILTER rule to the project configuration file. 
WARNING_FILTER += allow class="Use of atol"

Example 

long use_atol(const char *s){ 
    return atol(s); /* 'Use of atol' warning issued here */  
}

Relevant Configuration File Parameters

This class is implemented using a BAD_FUNCTION_* rule set in the general template configuration file.

The following configuration file parameters affect checks for this warning class.

 

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