netfilter: nf_conntrack_sip: Allow ct_sip_get_header() to be called with a null ct...

Signed-off-by: Simon Horman <horms@verge.net.au>
Acked-by: Julian Anastasov <ja@ssi.bg>

diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index 53d892210a049363fa3ab04f6e17b04fa9969bbe..2fd1ea2c1bb3ce33035c2169a6b632d553df9878 100644 (file)
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -152,6 +152,9 @@ static int parse_addr(const struct nf_conn *ct, const char *cp,
        const char *end;
        int ret = 0;
 
+       if (!ct)
+               return 0;
+
        memset(addr, 0, sizeof(*addr));
        switch (nf_ct_l3num(ct)) {
        case AF_INET: