Fix a bug in the asprintf implementation

*strp[len] does not mean (*strp)[len]

1 files changed, 6 insertions, 3 deletions

diff --git a/tools/windows/compat.c b/tools/windows/compat.c
index f0508b2..bce318b 100644
--- a/tools/windows/compat.c
+++ b/tools/windows/compat.c
@@ -61,13 +61,16 @@ int asprintf(char **strp, const char *fmt, ...)
 
 	va_start(ap, fmt);
 	len = _vscprintf(fmt, ap);
+	va_end(ap);
+
 	*strp = malloc(len+1);
 	if (!*strp)
 		return -1;
 
-	len = vsprintf(*strp, fmt, ap);
-	*strp[len] = 0;
-
+	va_start(ap, fmt);
+	_vsnprintf(*strp, len+1, fmt, ap);
 	va_end(ap);
+
+	(*strp)[len] = 0;
 	return len;
 }