From: Daniel Borkmann <dborkman@xxxxxxxxxx>
If skb_header_pointer() fails, we need to assign a verdict, that is
NF_DROP in this case, otherwise, we would leave the verdict from
conn_schedule() uninitialized when returning.
Signed-off-by: Daniel Borkmann <dborkman@xxxxxxxxxx>
Acked-by: Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
Acked-by: Neil Horman <nhorman@xxxxxxxxxxxxx>
Acked-by: Julian Anastasov <ja@xxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
---
net/netfilter/ipvs/ip_vs_proto_sctp.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/net/netfilter/ipvs/ip_vs_proto_sctp.c b/net/netfilter/ipvs/ip_vs_proto_sctp.c
index 23e596e..9ca7aa0 100644
--- a/net/netfilter/ipvs/ip_vs_proto_sctp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_sctp.c
@@ -20,13 +20,18 @@ sctp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
sctp_sctphdr_t *sh, _sctph;
sh = skb_header_pointer(skb, iph->len, sizeof(_sctph), &_sctph);
- if (sh == NULL)
+ if (sh == NULL) {
+ *verdict = NF_DROP;
return 0;
+ }
sch = skb_header_pointer(skb, iph->len + sizeof(sctp_sctphdr_t),
sizeof(_schunkh), &_schunkh);
- if (sch == NULL)
+ if (sch == NULL) {
+ *verdict = NF_DROP;
return 0;
+ }
+
net = skb_net(skb);
ipvs = net_ipvs(net);
rcu_read_lock();
--
1.8.4
--
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