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inet{6}_request_sock: Init ->opt and ->pktopts in the constructor

Browse source 
Wei Yongjun noticed that we may call reqsk_free on request sock objects where
the opt fields may not be initialized, fix it by introducing inet_reqsk_alloc
where we initialize ->opt to NULL and set ->pktopts to NULL in
inet6_reqsk_alloc.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2008-06-10 12:39:35 -07:00 committed by David S. Miller
parent 45d465bc23
commit ce4a7d0d48
8 changed files with 16 additions and 9 deletions
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4
include/linux/ipv6.h
View file

@ -396,8 +396,10 @@ static inline struct request_sock *inet6_reqsk_alloc(struct request_sock_ops *op
{
struct request_sock *req = reqsk_alloc(ops);
if (req != NULL)
if (req != NULL) {
inet_rsk(req)->inet6_rsk_offset = inet6_rsk_offset(req);
inet6_rsk(req)->pktopts = NULL;
}
return req;
}

10
include/net/inet_sock.h
View file

@ -197,4 +197,14 @@ static inline int inet_iif(const struct sk_buff *skb)
return skb->rtable->rt_iif;
}
static inline struct request_sock *inet_reqsk_alloc(struct request_sock_ops *ops)
{
struct request_sock *req = reqsk_alloc(ops);
if (req != NULL)
inet_rsk(req)->opt = NULL;
return req;
}
#endif /* _INET_SOCK_H */

3
net/dccp/ipv4.c
View file

@ -589,7 +589,7 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1)
goto drop;
req = reqsk_alloc(&dccp_request_sock_ops);
req = inet_reqsk_alloc(&dccp_request_sock_ops);
if (req == NULL)
goto drop;
@ -605,7 +605,6 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
ireq = inet_rsk(req);
ireq->loc_addr = ip_hdr(skb)->daddr;
ireq->rmt_addr = ip_hdr(skb)->saddr;
ireq->opt = NULL;
/*
* Step 3: Process LISTEN state

1
net/dccp/ipv6.c
View file

@ -421,7 +421,6 @@ static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
ireq6 = inet6_rsk(req);
ipv6_addr_copy(&ireq6->rmt_addr, &ipv6_hdr(skb)->saddr);
ipv6_addr_copy(&ireq6->loc_addr, &ipv6_hdr(skb)->daddr);
ireq6->pktopts = NULL;
if (ipv6_opt_accepted(sk, skb) ||
np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo ||

3
net/ipv4/syncookies.c
View file

@ -285,7 +285,7 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
cookie_check_timestamp(&tcp_opt);
ret = NULL;
req = reqsk_alloc(&tcp_request_sock_ops); /* for safety */
req = inet_reqsk_alloc(&tcp_request_sock_ops); /* for safety */
if (!req)
goto out;
@ -301,7 +301,6 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
ireq->rmt_port = th->source;
ireq->loc_addr = ip_hdr(skb)->daddr;
ireq->rmt_addr = ip_hdr(skb)->saddr;
ireq->opt = NULL;
ireq->snd_wscale = tcp_opt.snd_wscale;
ireq->rcv_wscale = tcp_opt.rcv_wscale;
ireq->sack_ok = tcp_opt.sack_ok;

2
net/ipv4/tcp_ipv4.c
View file

@ -1285,7 +1285,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1)
goto drop;
req = reqsk_alloc(&tcp_request_sock_ops);
req = inet_reqsk_alloc(&tcp_request_sock_ops);
if (!req)
goto drop;

1
net/ipv6/syncookies.c
View file

@ -198,7 +198,6 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb)
ireq = inet_rsk(req);
ireq6 = inet6_rsk(req);
treq = tcp_rsk(req);
ireq6->pktopts = NULL;
if (security_inet_conn_request(sk, skb, req)) {
reqsk_free(req);

1
net/ipv6/tcp_ipv6.c
View file

@ -1299,7 +1299,6 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
treq = inet6_rsk(req);
ipv6_addr_copy(&treq->rmt_addr, &ipv6_hdr(skb)->saddr);
ipv6_addr_copy(&treq->loc_addr, &ipv6_hdr(skb)->daddr);
treq->pktopts = NULL;
if (!want_cookie)
TCP_ECN_create_request(req, tcp_hdr(skb));