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ipvs: fix sctp chunk length order 

Fix wrong but non-fatal access to chunk length.
sch->length should be in network order, next chunk should
be aligned to 4 bytes. Problem noticed in sparse output.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Julian Anastasov 2013-03-09 23:25:06 +02:00 committed by Simon Horman
parent a82783c91d
commit cf2e39429c
1 changed files with 9 additions and 7 deletions
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16
net/netfilter/ipvs/ip_vs_proto_sctp.c
View File

@ -906,7 +906,7 @@ set_sctp_state(struct ip_vs_proto_data *pd, struct ip_vs_conn *cp,
sctp_chunkhdr_t _sctpch, *sch;
unsigned char chunk_type;
int event, next_state;
int ihl;
int ihl, cofs;
#ifdef CONFIG_IP_VS_IPV6
ihl = cp->af == AF_INET ? ip_hdrlen(skb) : sizeof(struct ipv6hdr);
@ -914,8 +914,8 @@ set_sctp_state(struct ip_vs_proto_data *pd, struct ip_vs_conn *cp,
ihl = ip_hdrlen(skb);
#endif
sch = skb_header_pointer(skb, ihl + sizeof(sctp_sctphdr_t),
sizeof(_sctpch), &_sctpch);
cofs = ihl + sizeof(sctp_sctphdr_t);
sch = skb_header_pointer(skb, cofs, sizeof(_sctpch), &_sctpch);
if (sch == NULL)
return;
@ -933,10 +933,12 @@ set_sctp_state(struct ip_vs_proto_data *pd, struct ip_vs_conn *cp,
*/
if ((sch->type == SCTP_CID_COOKIE_ECHO) ||
(sch->type == SCTP_CID_COOKIE_ACK)) {
sch = skb_header_pointer(skb, (ihl + sizeof(sctp_sctphdr_t) +
sch->length), sizeof(_sctpch), &_sctpch);
if (sch) {
if (sch->type == SCTP_CID_ABORT)
int clen = ntohs(sch->length);
if (clen >= sizeof(sctp_chunkhdr_t)) {
sch = skb_header_pointer(skb, cofs + ALIGN(clen, 4),
sizeof(_sctpch), &_sctpch);
if (sch && sch->type == SCTP_CID_ABORT)
chunk_type = sch->type;
}
}