Force nul-termination of strings after vsnprintf().

[tinc] / src / xmalloc.c

diff --git a/src/xmalloc.c b/src/xmalloc.c
index 39dc03c..a1b1fe8 100644 (file)
--- a/src/xmalloc.c
+++ b/src/xmalloc.c
@@ -155,6 +155,7 @@ int xvasprintf(char **strp, const char *fmt, va_list ap) {
        int result = vsnprintf(buf, sizeof buf, fmt, ap);
        if(result < 0)
                exit(xalloc_exit_failure);
        int result = vsnprintf(buf, sizeof buf, fmt, ap);
        if(result < 0)
                exit(xalloc_exit_failure);

+       buf[sizeof buf - 1] = 0;

        *strp = xstrdup(buf);
 #else
        int result = vasprintf(strp, fmt, ap);
        *strp = xstrdup(buf);
 #else
        int result = vasprintf(strp, fmt, ap);