Hi Ankita,
MISRA C:2012 Dir 4.14 states that "The validity of values received from external sources shall be checked" and the rationale behined this rule is that the values originating from external sources could be invalid because of errors or deliberate modification by attackers. In short it enforces us to check the data for validity before using it. Documentation suggests that "to reduce this violation, in your MATLAB code, check the validity of values that "coder.ceval" returns."
You could refer to the documenation on this rule which elaborately explains why this violation might happen and how to resolve or fix them: https://www.mathworks.com/help/bugfinder/ref/misrac2012dir4.14.html
Looking at the warning messages that you have provided it looks a possible NULL pointer violation.[might be some other reason as well]
- Use of tainted reference: https://www.mathworks.com/help/bugfinder/ref/useoftaintedpointer.html [A fix for this would be to check whether the pointer received from the external source is a NULL pointer or not.]
If none works, as a final attempt, [from the documentation] it looks like MISRA C:2012 Dir 4.14 violation is only possible from MATLAB Coder and if this violation occurs in the code generated from Embedded Coder or if you need more help you could connect with the MathWorks Technical Support:
- https://www.mathworks.com/support/contact_us.html
- https://www.mathworks.com/help/matlab/matlab_env/contact-technical-support.html
Hope this helps!
