windows: Fix off-by-one error in strerror_s_extended()

diff --git a/src/libstrongswan/utils/windows.c b/src/libstrongswan/utils/windows.c
index d679684d762bd100d752e3cfc5c186acb8046a8b..8820287b18cc719313df17229bd5a0dd97b955e0 100644 (file)
--- a/src/libstrongswan/utils/windows.c
+++ b/src/libstrongswan/utils/windows.c
@@ -362,7 +362,7 @@ int strerror_s_extended(char *buf, size_t buflen, int errnum)
        };
        int offset = EADDRINUSE;
 
-       if (errnum < offset || errnum > offset + countof(errstr))
+       if (errnum < offset || errnum >= offset + countof(errstr))
        {
                return strerror_s(buf, buflen, errnum);
        }