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inet: Pass inetpeer root into inet_getpeer*() interfaces. 

Otherwise we reference potentially non-existing members when
ipv6 is disabled.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-06-09 19:12:36 -07:00
parent 8b51b064a6
commit c0efc887dc
5 changed files with 11 additions and 18 deletions
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10
include/net/inetpeer.h
View File

@ -83,11 +83,11 @@ static inline bool inet_metrics_new(const struct inet_peer *p)
}
/* can be called with or without local BH being disabled */
struct inet_peer *inet_getpeer(struct net *net,
struct inet_peer *inet_getpeer(struct inet_peer_base *base,
const struct inetpeer_addr *daddr,
int create);
static inline struct inet_peer *inet_getpeer_v4(struct net *net,
static inline struct inet_peer *inet_getpeer_v4(struct inet_peer_base *base,
__be32 v4daddr,
int create)
{
@ -95,10 +95,10 @@ static inline struct inet_peer *inet_getpeer_v4(struct net *net,
daddr.addr.a4 = v4daddr;
daddr.family = AF_INET;
return inet_getpeer(net, &daddr, create);
return inet_getpeer(base, &daddr, create);
}
static inline struct inet_peer *inet_getpeer_v6(struct net *net,
static inline struct inet_peer *inet_getpeer_v6(struct inet_peer_base *base,
const struct in6_addr *v6daddr,
int create)
{
@ -106,7 +106,7 @@ static inline struct inet_peer *inet_getpeer_v6(struct net *net,
*(struct in6_addr *)daddr.addr.a6 = *v6daddr;
daddr.family = AF_INET6;
return inet_getpeer(net, &daddr, create);
return inet_getpeer(base, &daddr, create);
}
/* can be called from BH context or outside */

9
net/ipv4/inetpeer.c
View File

@ -391,12 +391,6 @@ static void unlink_from_pool(struct inet_peer *p, struct inet_peer_base *base,
call_rcu(&p->rcu, inetpeer_free_rcu);
}
static struct inet_peer_base *family_to_base(struct net *net,
int family)
{
return family == AF_INET ? net->ipv4.peers : net->ipv6.peers;
}
/* perform garbage collect on all items stacked during a lookup */
static int inet_peer_gc(struct inet_peer_base *base,
struct inet_peer __rcu **stack[PEER_MAXDEPTH],
@ -434,12 +428,11 @@ static int inet_peer_gc(struct inet_peer_base *base,
return cnt;
}
struct inet_peer *inet_getpeer(struct net *net,
struct inet_peer *inet_getpeer(struct inet_peer_base *base,
const struct inetpeer_addr *daddr,
int create)
{
struct inet_peer __rcu **stack[PEER_MAXDEPTH], ***stackptr;
struct inet_peer_base *base = family_to_base(net, daddr->family);
struct inet_peer *p;
unsigned int sequence;
int invalidated, gccnt = 0;

2
net/ipv4/ip_fragment.c
View File

@ -184,7 +184,7 @@ static void ip4_frag_init(struct inet_frag_queue *q, void *a)
qp->daddr = arg->iph->daddr;
qp->user = arg->user;
qp->peer = sysctl_ipfrag_max_dist ?
inet_getpeer_v4(net, arg->iph->saddr, 1) : NULL;
inet_getpeer_v4(net->ipv4.peers, arg->iph->saddr, 1) : NULL;
}
static __inline__ void ip4_frag_free(struct inet_frag_queue *q)

6
net/ipv4/route.c
View File

@ -1328,7 +1328,7 @@ void rt_bind_peer(struct rtable *rt, __be32 daddr, int create)
struct net *net = dev_net(rt->dst.dev);
struct inet_peer *peer;
peer = inet_getpeer_v4(net, daddr, create);
peer = inet_getpeer_v4(net->ipv4.peers, daddr, create);
if (peer && cmpxchg(&rt->peer, NULL, peer) != NULL)
inet_putpeer(peer);
@ -1684,7 +1684,7 @@ unsigned short ip_rt_frag_needed(struct net *net, const struct iphdr *iph,
unsigned short est_mtu = 0;
struct inet_peer *peer;
peer = inet_getpeer_v4(net, iph->daddr, 1);
peer = inet_getpeer_v4(net->ipv4.peers, iph->daddr, 1);
if (peer) {
unsigned short mtu = new_mtu;
@ -1929,7 +1929,7 @@ static void rt_init_metrics(struct rtable *rt, const struct flowi4 *fl4,
if (fl4 && (fl4->flowi4_flags & FLOWI_FLAG_PRECOW_METRICS))
create = 1;
rt->peer = peer = inet_getpeer_v4(net, rt->rt_dst, create);
rt->peer = peer = inet_getpeer_v4(net->ipv4.peers, rt->rt_dst, create);
if (peer) {
rt->rt_peer_genid = rt_peer_genid();
if (inet_metrics_new(peer))

2
net/ipv6/route.c
View File

@ -306,7 +306,7 @@ void rt6_bind_peer(struct rt6_info *rt, int create)
struct net *net = dev_net(rt->dst.dev);
struct inet_peer *peer;
peer = inet_getpeer_v6(net, &rt->rt6i_dst.addr, create);
peer = inet_getpeer_v6(net->ipv6.peers, &rt->rt6i_dst.addr, create);
if (peer && cmpxchg(&rt->rt6i_peer, NULL, peer) != NULL)
inet_putpeer(peer);
else