CWARN.NOEFFECT.UCMP.GE
Ineffective comparison of unsigned value is always true
The CWARN.NOEFFECT.UCMP.GE checker flags code outside of macros, in which there is a comparison of an unsigned value to zero that is always true.
Vulnerability and risk
If 'a' is an unsigned value, the comparisons a >= 0 and 0 <= a are always true. These comparisons have no effect, so it's probable that design intent isn't being accomplished.
Vulnerable code example
Copy
int foo(unsigned int a) {
while (0 <= a)
a--;
return 0;
}Klocwork flags line 2, in which the comparison 0 <= a is always true.