From 16cf145fd659a01c5db7f286e8c9a4700f736920 Mon Sep 17 00:00:00 2001 From: Joe Hershberger Date: Tue, 3 Jul 2018 19:36:41 -0500 Subject: [PATCH] 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 --- net/net.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/net.c b/net/net.c index 42a50e6..333102e 100644 --- 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'; }