fix getservby*() with null pointer for protocol argument

[musl] / src / network / getservbyname_r.c

diff --git a/src/network/getservbyname_r.c b/src/network/getservbyname_r.c
index 5c02515..efa5d91 100644 (file)
--- a/src/network/getservbyname_r.c
+++ b/src/network/getservbyname_r.c
@@ -12,6 +12,10 @@ int getservbyname_r(const char *name, const char *prots,
        struct addrinfo *ai, hint = { .ai_family = AF_INET };
        int i;
 
+       if (!prots) return -(
+               getservbyname_r(name, "tcp", se, buf, buflen, res)
+               && getservbyname_r(name, "udp", se, buf, buflen, res) );
+
        /* Align buffer */
        i = (uintptr_t)buf & sizeof(char *)-1;
        if (!i) i = sizeof(char *);