Viewing file:  taint-alloc-2.c (1.02 KB) -rw-r--r--
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// TODO: remove need for this option:
/* { dg-additional-options "-fanalyzer-checker=taint" } */
#include "analyzer-decls.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct foo
{
int num;
};
/* malloc with tainted size from a field. */
void *test_1 (FILE *f)
{
struct foo tmp;
fread(&tmp, sizeof(tmp), 1, f); /* { dg-message "\\(\[0-9\]+\\) 'tmp' gets an unchecked value here" "event: tmp gets unchecked value" { xfail *-*-* } } */
__analyzer_dump_state ("taint", tmp.num); /* { dg-warning "state: 'tainted'" } */
__analyzer_dump_state ("taint", tmp.num * 16); /* { dg-warning "state: 'tainted'" } */
return malloc (tmp.num * 16); /* { dg-warning "use of attacker-controlled value 'tmp\\.num \\* 16' as allocation size without upper-bounds checking" "warning" } */
/* { dg-message "\\(\[0-9\]+\\) use of attacker-controlled value 'tmp\\.num \\* 16' as allocation size without upper-bounds checking" "final event with expr" { target *-*-* } .-1 } */
// TODO: show where tmp.num * 16 gets the bogus value
}
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