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[VCRUNTIME] Fix a bug in x64 __security_init_cookie

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This commit is contained in:
Timo Kreuzer
2025-04-07 13:57:17 +00:00
parent 182f353b2f
commit 52719b52ae
1 changed files with 6 additions and 5 deletions
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sdk/lib/vcruntime/__security_init_cookie.c
+6 -5
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@@ -70,16 +70,17 @@ void __security_init_cookie(void)
randomValue += GetCurrentProcessId();
randomValue = _rotlptr(randomValue, GetCurrentProcessId() >> 2);
if (randomValue == DEFAULT_SECURITY_COOKIE)
{
randomValue++;
}
#ifdef _WIN64
/* Zero out highest 16 bits */
randomValue &= 0x0000FFFFFFFFFFFFull;
#endif
/* Avoid the default security cookie */
if (randomValue == DEFAULT_SECURITY_COOKIE)
{
randomValue++;
}
__security_cookie = randomValue;
__security_cookie_complement = ~randomValue;
}