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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
  ipv6: protocol for address routes
  icmp: icmp_sk() should not use smp_processor_id() in preemptible code
  pkt_sched: Fix qdisc list locking
  pkt_sched: Fix qdisc_watchdog() vs. dev_deactivate() race
  sctp: fix potential panics in the SCTP-AUTH API.
This commit is contained in:
Linus Torvalds 2008-08-23 12:14:42 -07:00
parent 7a8fc9b248 f410a1fba7
commit 6450f65168
10 changed files with 149 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/net/pkt_sched.h
View File

@ -78,6 +78,7 @@ extern struct Qdisc *fifo_create_dflt(struct Qdisc *sch, struct Qdisc_ops *ops,
extern int register_qdisc(struct Qdisc_ops *qops);
extern int unregister_qdisc(struct Qdisc_ops *qops);
extern void qdisc_list_del(struct Qdisc *q);
extern struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle);
extern struct Qdisc *qdisc_lookup_class(struct net_device *dev, u32 handle);
extern struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r,

5
include/net/sch_generic.h
View File

@ -193,6 +193,11 @@ static inline struct Qdisc *qdisc_root(struct Qdisc *qdisc)
return qdisc->dev_queue->qdisc;
}
static inline struct Qdisc *qdisc_root_sleeping(struct Qdisc *qdisc)
{
return qdisc->dev_queue->qdisc_sleeping;
}
/* The qdisc root lock is a mechanism by which to top level
* of a qdisc tree can be locked from any qdisc node in the
* forest. This allows changing the configuration of some

22
net/ipv4/icmp.c
View File

@ -204,18 +204,22 @@ static struct sock *icmp_sk(struct net *net)
return net->ipv4.icmp_sk[smp_processor_id()];
}
static inline int icmp_xmit_lock(struct sock *sk)
static inline struct sock *icmp_xmit_lock(struct net *net)
{
struct sock *sk;
local_bh_disable();
sk = icmp_sk(net);
if (unlikely(!spin_trylock(&sk->sk_lock.slock))) {
/* This can happen if the output path signals a
* dst_link_failure() for an outgoing ICMP packet.
*/
local_bh_enable();
return 1;
return NULL;
}
return 0;
return sk;
}
static inline void icmp_xmit_unlock(struct sock *sk)
@ -354,15 +358,17 @@ static void icmp_reply(struct icmp_bxm *icmp_param, struct sk_buff *skb)
struct ipcm_cookie ipc;
struct rtable *rt = skb->rtable;
struct net *net = dev_net(rt->u.dst.dev);
struct sock *sk = icmp_sk(net);
struct inet_sock *inet = inet_sk(sk);
struct sock *sk;
struct inet_sock *inet;
__be32 daddr;
if (ip_options_echo(&icmp_param->replyopts, skb))
return;
if (icmp_xmit_lock(sk))
sk = icmp_xmit_lock(net);
if (sk == NULL)
return;
inet = inet_sk(sk);
icmp_param->data.icmph.checksum = 0;
@ -419,7 +425,6 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
if (!rt)
goto out;
net = dev_net(rt->u.dst.dev);
sk = icmp_sk(net);
/*
* Find the original header. It is expected to be valid, of course.
@ -483,7 +488,8 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
}
}
if (icmp_xmit_lock(sk))
sk = icmp_xmit_lock(net);
if (sk == NULL)
return;
/*

1
net/ipv6/addrconf.c
View File

@ -1688,6 +1688,7 @@ addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
.fc_dst_len = plen,
.fc_flags = RTF_UP | flags,
.fc_nlinfo.nl_net = dev_net(dev),
.fc_protocol = RTPROT_KERNEL,
};
ipv6_addr_copy(&cfg.fc_dst, pfx);

23
net/ipv6/icmp.c
View File

@ -91,19 +91,22 @@ static struct inet6_protocol icmpv6_protocol = {
.flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
};
static __inline__ int icmpv6_xmit_lock(struct sock *sk)
static __inline__ struct sock *icmpv6_xmit_lock(struct net *net)
{
struct sock *sk;
local_bh_disable();
sk = icmpv6_sk(net);
if (unlikely(!spin_trylock(&sk->sk_lock.slock))) {
/* This can happen if the output path (f.e. SIT or
* ip6ip6 tunnel) signals dst_link_failure() for an
* outgoing ICMP6 packet.
*/
local_bh_enable();
return 1;
return NULL;
}
return 0;
return sk;
}
static __inline__ void icmpv6_xmit_unlock(struct sock *sk)
@ -392,11 +395,10 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
fl.fl_icmp_code = code;
security_skb_classify_flow(skb, &fl);
sk = icmpv6_sk(net);
np = inet6_sk(sk);
if (icmpv6_xmit_lock(sk))
sk = icmpv6_xmit_lock(net);
if (sk == NULL)
return;
np = inet6_sk(sk);
if (!icmpv6_xrlim_allow(sk, type, &fl))
goto out;
@ -539,11 +541,10 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
fl.fl_icmp_type = ICMPV6_ECHO_REPLY;
security_skb_classify_flow(skb, &fl);
sk = icmpv6_sk(net);
np = inet6_sk(sk);
if (icmpv6_xmit_lock(sk))
sk = icmpv6_xmit_lock(net);
if (sk == NULL)
return;
np = inet6_sk(sk);
if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst))
fl.oif = np->mcast_oif;

48
net/sched/sch_api.c
View File

@ -199,19 +199,53 @@ struct Qdisc *qdisc_match_from_root(struct Qdisc *root, u32 handle)
return NULL;
}
/*
* This lock is needed until some qdiscs stop calling qdisc_tree_decrease_qlen()
* without rtnl_lock(); currently hfsc_dequeue(), netem_dequeue(), tbf_dequeue()
*/
static DEFINE_SPINLOCK(qdisc_list_lock);
static void qdisc_list_add(struct Qdisc *q)
{
if ((q->parent != TC_H_ROOT) && !(q->flags & TCQ_F_INGRESS)) {
spin_lock_bh(&qdisc_list_lock);
list_add_tail(&q->list, &qdisc_root_sleeping(q)->list);
spin_unlock_bh(&qdisc_list_lock);
}
}
void qdisc_list_del(struct Qdisc *q)
{
if ((q->parent != TC_H_ROOT) && !(q->flags & TCQ_F_INGRESS)) {
spin_lock_bh(&qdisc_list_lock);
list_del(&q->list);
spin_unlock_bh(&qdisc_list_lock);
}
}
EXPORT_SYMBOL(qdisc_list_del);
struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle)
{
unsigned int i;
struct Qdisc *q;
spin_lock_bh(&qdisc_list_lock);
for (i = 0; i < dev->num_tx_queues; i++) {
struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
struct Qdisc *q, *txq_root = txq->qdisc_sleeping;
struct Qdisc *txq_root = txq->qdisc_sleeping;
q = qdisc_match_from_root(txq_root, handle);
if (q)
return q;
goto unlock;
}
return qdisc_match_from_root(dev->rx_queue.qdisc_sleeping, handle);
q = qdisc_match_from_root(dev->rx_queue.qdisc_sleeping, handle);
unlock:
spin_unlock_bh(&qdisc_list_lock);
return q;
}
static struct Qdisc *qdisc_leaf(struct Qdisc *p, u32 classid)
@ -444,6 +478,10 @@ void qdisc_watchdog_schedule(struct qdisc_watchdog *wd, psched_time_t expires)
{
ktime_t time;
if (test_bit(__QDISC_STATE_DEACTIVATED,
&qdisc_root_sleeping(wd->qdisc)->state))
return;
wd->qdisc->flags |= TCQ_F_THROTTLED;
time = ktime_set(0, 0);
time = ktime_add_ns(time, PSCHED_US2NS(expires));
@ -806,8 +844,8 @@ qdisc_create(struct net_device *dev, struct netdev_queue *dev_queue,
goto err_out3;
}
}
if ((parent != TC_H_ROOT) && !(sch->flags & TCQ_F_INGRESS))
list_add_tail(&sch->list, &dev_queue->qdisc_sleeping->list);
qdisc_list_add(sch);
return sch;
}

4
net/sched/sch_cbq.c
View File

@ -521,6 +521,10 @@ static void cbq_ovl_delay(struct cbq_class *cl)
struct cbq_sched_data *q = qdisc_priv(cl->qdisc);
psched_tdiff_t delay = cl->undertime - q->now;
if (test_bit(__QDISC_STATE_DEACTIVATED,
&qdisc_root_sleeping(cl->qdisc)->state))
return;
if (!cl->delayed) {
psched_time_t sched = q->now;
ktime_t expires;

5
net/sched/sch_generic.c
View File

@ -526,10 +526,9 @@ void qdisc_destroy(struct Qdisc *qdisc)
!atomic_dec_and_test(&qdisc->refcnt))
return;
if (qdisc->parent)
list_del(&qdisc->list);
#ifdef CONFIG_NET_SCHED
qdisc_list_del(qdisc);
qdisc_put_stab(qdisc->stab);
#endif
gen_kill_estimator(&qdisc->bstats, &qdisc->rate_est);

4
net/sctp/endpointola.c
View File

@ -103,6 +103,7 @@ static struct sctp_endpoint *sctp_endpoint_init(struct sctp_endpoint *ep,
/* Initialize the CHUNKS parameter */
auth_chunks->param_hdr.type = SCTP_PARAM_CHUNKS;
auth_chunks->param_hdr.length = htons(sizeof(sctp_paramhdr_t));
/* If the Add-IP functionality is enabled, we must
* authenticate, ASCONF and ASCONF-ACK chunks
@ -110,8 +111,7 @@ static struct sctp_endpoint *sctp_endpoint_init(struct sctp_endpoint *ep,
if (sctp_addip_enable) {
auth_chunks->chunks[0] = SCTP_CID_ASCONF;
auth_chunks->chunks[1] = SCTP_CID_ASCONF_ACK;
auth_chunks->param_hdr.length =
htons(sizeof(sctp_paramhdr_t) + 2);
auth_chunks->param_hdr.length += htons(2);
}
}

85
net/sctp/socket.c
View File

@ -3055,6 +3055,9 @@ static int sctp_setsockopt_auth_chunk(struct sock *sk,
{
struct sctp_authchunk val;
if (!sctp_auth_enable)
return -EACCES;
if (optlen != sizeof(struct sctp_authchunk))
return -EINVAL;
if (copy_from_user(&val, optval, optlen))
@ -3085,6 +3088,9 @@ static int sctp_setsockopt_hmac_ident(struct sock *sk,
struct sctp_hmacalgo *hmacs;
int err;
if (!sctp_auth_enable)
return -EACCES;
if (optlen < sizeof(struct sctp_hmacalgo))
return -EINVAL;
@ -3123,6 +3129,9 @@ static int sctp_setsockopt_auth_key(struct sock *sk,
struct sctp_association *asoc;
int ret;
if (!sctp_auth_enable)
return -EACCES;
if (optlen <= sizeof(struct sctp_authkey))
return -EINVAL;
@ -3160,6 +3169,9 @@ static int sctp_setsockopt_active_key(struct sock *sk,
struct sctp_authkeyid val;
struct sctp_association *asoc;
if (!sctp_auth_enable)
return -EACCES;
if (optlen != sizeof(struct sctp_authkeyid))
return -EINVAL;
if (copy_from_user(&val, optval, optlen))
@ -3185,6 +3197,9 @@ static int sctp_setsockopt_del_key(struct sock *sk,
struct sctp_authkeyid val;
struct sctp_association *asoc;
if (!sctp_auth_enable)
return -EACCES;
if (optlen != sizeof(struct sctp_authkeyid))
return -EINVAL;
if (copy_from_user(&val, optval, optlen))
@ -5197,19 +5212,29 @@ static int sctp_getsockopt_maxburst(struct sock *sk, int len,
static int sctp_getsockopt_hmac_ident(struct sock *sk, int len,
char __user *optval, int __user *optlen)
{
struct sctp_hmacalgo __user *p = (void __user *)optval;
struct sctp_hmac_algo_param *hmacs;
__u16 param_len;
__u16 data_len = 0;
u32 num_idents;
if (!sctp_auth_enable)
return -EACCES;
hmacs = sctp_sk(sk)->ep->auth_hmacs_list;
param_len = ntohs(hmacs->param_hdr.length);
data_len = ntohs(hmacs->param_hdr.length) - sizeof(sctp_paramhdr_t);
if (len < param_len)
if (len < sizeof(struct sctp_hmacalgo) + data_len)
return -EINVAL;
len = sizeof(struct sctp_hmacalgo) + data_len;
num_idents = data_len / sizeof(u16);
if (put_user(len, optlen))
return -EFAULT;
if (copy_to_user(optval, hmacs->hmac_ids, len))
if (put_user(num_idents, &p->shmac_num_idents))
return -EFAULT;
if (copy_to_user(p->shmac_idents, hmacs->hmac_ids, data_len))
return -EFAULT;
return 0;
}
@ -5219,6 +5244,9 @@ static int sctp_getsockopt_active_key(struct sock *sk, int len,
struct sctp_authkeyid val;
struct sctp_association *asoc;
if (!sctp_auth_enable)
return -EACCES;
if (len < sizeof(struct sctp_authkeyid))
return -EINVAL;
if (copy_from_user(&val, optval, sizeof(struct sctp_authkeyid)))
@ -5233,6 +5261,12 @@ static int sctp_getsockopt_active_key(struct sock *sk, int len,
else
val.scact_keynumber = sctp_sk(sk)->ep->active_key_id;
len = sizeof(struct sctp_authkeyid);
if (put_user(len, optlen))
return -EFAULT;
if (copy_to_user(optval, &val, len))
return -EFAULT;
return 0;
}
@ -5243,13 +5277,16 @@ static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len,
struct sctp_authchunks val;
struct sctp_association *asoc;
struct sctp_chunks_param *ch;
u32 num_chunks;
u32 num_chunks = 0;
char __user *to;
if (len <= sizeof(struct sctp_authchunks))
if (!sctp_auth_enable)
return -EACCES;
if (len < sizeof(struct sctp_authchunks))
return -EINVAL;
if (copy_from_user(&val, p, sizeof(struct sctp_authchunks)))
if (copy_from_user(&val, optval, sizeof(struct sctp_authchunks)))
return -EFAULT;
to = p->gauth_chunks;
@ -5258,20 +5295,21 @@ static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len,
return -EINVAL;
ch = asoc->peer.peer_chunks;
if (!ch)
goto num;
/* See if the user provided enough room for all the data */
num_chunks = ntohs(ch->param_hdr.length) - sizeof(sctp_paramhdr_t);
if (len < num_chunks)
return -EINVAL;
len = num_chunks;
if (put_user(len, optlen))
if (copy_to_user(to, ch->chunks, num_chunks))
return -EFAULT;
num:
len = sizeof(struct sctp_authchunks) + num_chunks;
if (put_user(len, optlen)) return -EFAULT;
if (put_user(num_chunks, &p->gauth_number_of_chunks))
return -EFAULT;
if (copy_to_user(to, ch->chunks, len))
return -EFAULT;
return 0;
}
@ -5282,13 +5320,16 @@ static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len,
struct sctp_authchunks val;
struct sctp_association *asoc;
struct sctp_chunks_param *ch;
u32 num_chunks;
u32 num_chunks = 0;
char __user *to;
if (len <= sizeof(struct sctp_authchunks))
if (!sctp_auth_enable)
return -EACCES;
if (len < sizeof(struct sctp_authchunks))
return -EINVAL;
if (copy_from_user(&val, p, sizeof(struct sctp_authchunks)))
if (copy_from_user(&val, optval, sizeof(struct sctp_authchunks)))
return -EFAULT;
to = p->gauth_chunks;
@ -5301,17 +5342,21 @@ static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len,
else
ch = sctp_sk(sk)->ep->auth_chunk_list;
if (!ch)
goto num;
num_chunks = ntohs(ch->param_hdr.length) - sizeof(sctp_paramhdr_t);
if (len < num_chunks)
if (len < sizeof(struct sctp_authchunks) + num_chunks)
return -EINVAL;
len = num_chunks;
if (copy_to_user(to, ch->chunks, num_chunks))
return -EFAULT;
num:
len = sizeof(struct sctp_authchunks) + num_chunks;
if (put_user(len, optlen))
return -EFAULT;
if (put_user(num_chunks, &p->gauth_number_of_chunks))
return -EFAULT;
if (copy_to_user(to, ch->chunks, len))
return -EFAULT;
return 0;
}