net: Make copy_filename() accept NULL src

Rather than crashing, check the src ptr and set dst to empty string.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>

diff --git a/net/net.c b/net/net.c
index 42a50e6..333102e 100644 (file)
--- a/net/net.c
+++ b/net/net.c
@@ -1522,12 +1522,12 @@ void net_set_udp_header(uchar *pkt, struct in_addr dest, int dport, int sport,
 
 void copy_filename(char *dst, const char *src, int size)
 {
-       if (*src && (*src == '"')) {
+       if (src && *src && (*src == '"')) {
                ++src;
                --size;
        }
 
-       while ((--size > 0) && *src && (*src != '"'))
+       while ((--size > 0) && src && *src && (*src != '"'))
                *dst++ = *src++;
        *dst = '\0';
 }