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authorHerbert Xu <herbert@gondor.apana.org.au>2005-10-18 12:03:28 +1000
committerArnaldo Carvalho de Melo <acme@mandriva.com>2005-10-20 14:49:59 -0200
commit49c5bfaffe8ae6e6440dc4bf78b03800960d93f5 (patch)
treedbd4565b42697a7fdeee8d088f017eb7df8bc594
parentffa29347dfbc158d1f47f5925324a6f5713659c1 (diff)
[DCCP]: Clear the IPCB area
Turns out the problem has nothing to do with use-after-free or double-free. It's just that we're not clearing the CB area and DCCP unlike TCP uses a CB format that's incompatible with IP. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Ian McDonald <imcdnzl@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
-rw-r--r--net/dccp/ipv4.c2
-rw-r--r--net/dccp/output.c1
2 files changed, 3 insertions, 0 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index ae088d1347a..6298cf58ff9 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -463,6 +463,7 @@ static int dccp_v4_send_response(struct sock *sk, struct request_sock *req,
if (skb != NULL) {
const struct inet_request_sock *ireq = inet_rsk(req);
+ memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
err = ip_build_and_send_pkt(skb, sk, ireq->loc_addr,
ireq->rmt_addr,
ireq->opt);
@@ -647,6 +648,7 @@ int dccp_v4_send_reset(struct sock *sk, enum dccp_reset_codes code)
if (skb != NULL) {
const struct inet_sock *inet = inet_sk(sk);
+ memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
err = ip_build_and_send_pkt(skb, sk,
inet->saddr, inet->daddr, NULL);
if (err == NET_XMIT_CN)
diff --git a/net/dccp/output.c b/net/dccp/output.c
index 7006549f705..29250749f16 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -100,6 +100,7 @@ int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
+ memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
err = ip_queue_xmit(skb, 0);
if (err <= 0)
return err;