> Coverity found what looks like a real leak in net/dccp/ipv6.c::dccp_v6_do_rcv()
| otoh, it seems to me that opt_skb doesn't actually do anything and can be
| removed?
This is right, there is no code referencing opt_skb: compare with net/ipv6/tcp_ipv6.c.
Until someone has time to add the missing DCCP-specific code, it does seem better
to replace the dead part with a FIXME. This is done by the patch below, applies to
davem-net2.6 and has been tested to compile.
Signed-off-by: Gerrit Renker <gerrit@xxxxxxxxxxxxxx>
--
ipv6.c | 23 ++---------------------
1 file changed, 2 insertions(+), 21 deletions(-)
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 7a47399..9d19344 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -956,8 +956,6 @@ out:
*/
static int dccp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
{
- struct ipv6_pinfo *np = inet6_sk(sk);
- struct sk_buff *opt_skb = NULL;
/* Imagine: socket is IPv6. IPv4 packet arrives,
goes to IPv4 receive handler and backlogged.
@@ -978,21 +976,8 @@ static int dccp_v6_do_rcv(struct sock *s
* called with bh processing disabled.
*/
- /* Do Stevens' IPV6_PKTOPTIONS.
-
- Yes, guys, it is the only place in our code, where we
- may make it not affecting IPv4.
- The rest of code is protocol independent,
- and I do not like idea to uglify IPv4.
-
- Actually, all the idea behind IPV6_PKTOPTIONS
- looks not very well thought. For now we latch
- options, received in the last packet, enqueued
- by tcp. Feel free to propose better solution.
- --ANK (980728)
- */
- if (np->rxopt.all)
- opt_skb = skb_clone(skb, GFP_ATOMIC);
+ /* FIXME: Add handling of IPV6_PKTOPTIONS with appropriate freeing of
+ * skb (see net/ipv6/tcp_ipv6.c for example) */
if (sk->sk_state == DCCP_OPEN) { /* Fast path */
if (dccp_rcv_established(sk, skb, dccp_hdr(skb), skb->len))
@@ -1013,8 +998,6 @@ static int dccp_v6_do_rcv(struct sock *s
if (nsk != sk) {
if (dccp_child_process(sk, nsk, skb))
goto reset;
- if (opt_skb != NULL)
- __kfree_skb(opt_skb);
return 0;
}
}
@@ -1026,8 +1009,6 @@ static int dccp_v6_do_rcv(struct sock *s
reset:
dccp_v6_ctl_send_reset(skb);
discard:
- if (opt_skb != NULL)
- __kfree_skb(opt_skb);
kfree_skb(skb);
return 0;
}
-
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