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Fix stack memory, undefined behavior, etc.

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Justine Tunney 2023-08-15 19:09:35 -07:00
parent 110559ce6a
commit 507d7a0b0b
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GPG key ID: BE714B4575D6E328
11 changed files with 41 additions and 186 deletions
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4
libc/runtime/mmap.c
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@ -372,13 +372,13 @@ dontasan inline void *__mmap_unlocked(void *addr, size_t size, int prot,
if ((dm = sys_mmap(p + size - SIGSTKSZ, SIGSTKSZ, prot,
f | MAP_GROWSDOWN_linux, fd, off))
.addr != MAP_FAILED) {
npassert(sys_mmap(p, page_size, PROT_NONE,
npassert(sys_mmap(p, GetGuardSize(), PROT_NONE,
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0)
.addr == p);
dm.addr = p;
p = __finish_memory(p, size, prot, flags, fd, off, f, x, n, dm);
if (IsAsan() && p != MAP_FAILED) {
__asan_poison(p, page_size, kAsanStackOverflow);
__asan_poison(p, GetGuardSize(), kAsanStackOverflow);
}
return p;
} else if (errno == ENOTSUP) {