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add 0 byte to canary to prevent spurious read overflow to read the canary (issue #951, pr #953)

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Daan 2024-10-27 21:39:07 -07:00
parent afba03145c
commit 5f35933331
4 changed files with 24 additions and 3 deletions
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13
test/main-override-static.c
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@ -19,6 +19,7 @@ static void test_reserved(void);
static void negative_stat(void);
static void alloc_huge(void);
static void test_heap_walk(void);
static void test_canary_leak(void);
// static void test_large_pages(void);
@ -31,7 +32,8 @@ int main() {
// double_free2();
// corrupt_free();
// block_overflow1();
block_overflow2();
// block_overflow2();
test_canary_leak();
// test_aslr();
// invalid_free();
// test_reserved();
@ -226,6 +228,15 @@ static void test_heap_walk(void) {
mi_heap_visit_blocks(heap, true, &test_visit, NULL);
}
static void test_canary_leak(void) {
char* p = mi_mallocn_tp(char,23);
for(int i = 0; i < 23; i++) {
p[i] = '0'+i;
}
puts(p);
free(p);
}
// Experiment with huge OS pages
#if 0