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[KERNEL32] Check for null buffer in GetEnviornmentVariableW

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Checks if lpBuffer is null before writing the null terminator to the end of it. This prevents some crashes in the kernel32 winetest sync to wine-10.0.
This commit is contained in:
Carl J. Bialorucki
2026-01-09 08:54:58 -08:00
parent 02875dec22
commit c20ec94409
1 changed files with 2 additions and 1 deletions
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dll/win32/kernel32/client/environ.c
+2 -1
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@@ -204,7 +204,8 @@ GetEnvironmentVariableW(IN LPCWSTR lpName,
return 0;
}
lpBuffer[VarValue.Length / sizeof(WCHAR)] = UNICODE_NULL;
if (lpBuffer)
lpBuffer[VarValue.Length / sizeof(WCHAR)] = UNICODE_NULL;
return (VarValue.Length / sizeof(WCHAR));
}