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Improve alloca() safety even more

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This commit is contained in:
Justine Tunney 2022-04-01 22:50:15 -07:00
parent 38cb6e71ca
commit 9b11206ae3
1 changed files with 2 additions and 2 deletions
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4
libc/intrin/asan.c
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@ -1241,8 +1241,8 @@ void __asan_unpoison_stack_memory(uintptr_t addr, size_t size) {
void __asan_alloca_poison(uintptr_t addr, size_t size) {
__asan_poison(addr - 32, 32, kAsanAllocaUnderrun);
__asan_poison(ROUNDUP(addr + size, 32), 32, kAsanAllocaOverrun);
__asan_unpoison(addr, ROUNDUP(addr + size, 32) - (addr + size) + 32 + size);
__asan_poison(addr + size, 32, kAsanAllocaOverrun);
__asan_unpoison(addr, size);
}
void __asan_allocas_unpoison(uintptr_t x, uintptr_t y) {