hardened_malloc/test/simple-memory-corruption/overflow_large_8_byte.c

#include <stdlib.h>

#include "../test_util.h"

OPTNONE int main(void) {
    char *p = malloc(256 * 1024);
    if (!p) {
        return 1;
    }
    size_t size = malloc_usable_size(p);
    *(p + size + 7) = 0;
    free(p);
    return 0;
}
add simple overflow tests 2018-09-04 13:06:23 +00:00			`#include <stdlib.h>`

tests: make no-optimize attribute Clang compatible 2020-06-17 20:39:50 +00:00			`#include "../test_util.h"`

			`OPTNONE int main(void) {`
increase size for eight_byte_overflow_large test This was not working as expected due to CONFIG_EXTENDED_SIZE_CLASSES resulting in 128k being a slab allocation size class. The addition of padding for the canary pushes it into the next size class, resulting in this writing over size class rounding padding rather than this actually being an overflow as intended. 2020-04-11 19:17:37 +00:00			`char p = malloc(256 1024);`
add simple overflow tests 2018-09-04 13:06:23 +00:00			`if (!p) {`
			`return 1;`
			`}`
use calculated size for overflow tests This greatly reduces how much these tests depend on hard-wired knowledge about the size classes. 2022-01-04 02:11:31 +00:00			`size_t size = malloc_usable_size(p);`
			`*(p + size + 7) = 0;`
add simple overflow tests 2018-09-04 13:06:23 +00:00			`free(p);`
			`return 0;`
			`}`