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add corrupted block scanning on overflow detection

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This commit is contained in:
daan 2020-04-06 16:10:43 -07:00
parent 083392fa15
commit 8a7d5804bc
3 changed files with 67 additions and 14 deletions
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19
test/main-override-static.c
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@ -11,6 +11,7 @@ static void double_free1();
static void double_free2();
static void corrupt_free();
static void block_overflow1();
static void block_overflow2();
static void dangling_ptr_write();
int main() {
@ -20,7 +21,8 @@ int main() {
// double_free1();
// double_free2();
// corrupt_free();
block_overflow1();
// block_overflow1();
block_overflow2();
// dangling_ptr_write();
void* p1 = malloc(78);
@ -51,6 +53,21 @@ static void block_overflow1() {
free(p);
}
static void block_overflow2() {
void* p[100];
for (int i = 0; i < 100; i++) {
p[i] = mi_malloc(17);
}
memset(p[10], 0, 90);
memset(p[40], 0, 90);
memset(p[79], 0, 70);
for (int i = 99; i >= 0; i-=2) {
if (i > 0) free(p[i - 1]);
free(p[i]);
}
}
static void dangling_ptr_write() {
for (int i = 0; i < 1000; i++) {
uint8_t* p = (uint8_t*)mi_malloc(16);