# bugprone-misplaced-pointer-artithmetic-in-alloc¶

Finds cases where an integer expression is added to or subtracted from the result of a memory allocation function (malloc(), calloc(), realloc(), alloca()) instead of its argument. The check detects error cases even if one of these functions is called by a constant function pointer.

Example code:

void bad_malloc(int n) {
char *p = (char*) malloc(n) + 10;
}


The suggested fix is to add the integer expression to the argument of malloc and not to its result. In the example above the fix would be

char *p = (char*) malloc(n + 10);