Synopsis

Using std::sort might cause buffer overrun.

Enabled by default

No

Severity/Certainty

Medium/Medium

Full description

Using std::sort might cause a buffer overrun. std::sort can take a pointer to an array and a pointer to the end of the array as arguments, but if the pointer to the end of the array actually points beyond the end of the array being sorted, a buffer overrun might occur.

Coding standards

Code examples

The following code example fails the check and will give a warning:

#include <algorithm>

void example(void) {
  int a[10] = {0,1,2,3,4,5,6,7,8,9};
  std::sort(a, a+11);
}

The following code example passes the check and will not give a warning about this issue:

#include <algorithm>

void example(void) {
  int a[10] = {0,1,2,3,4,5,6,7,8,9};
  std::sort(a, a+5);
}