From 49c5bfaffe8ae6e6440dc4bf78b03800960d93f5 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Tue, 18 Oct 2005 12:03:28 +1000 Subject: [PATCH] [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 Signed-off-by: Ian McDonald Signed-off-by: Arnaldo Carvalho de Melo --- net/dccp/ipv4.c | 2 ++ net/dccp/output.c | 1 + 2 files changed, 3 insertions(+) diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index ae088d1..6298cf5 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 7006549..2925074 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; -- 2.7.4