From 92a0acce186cde8ead56c6915d9479773673ea1a Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Tue, 17 Feb 2009 21:24:05 -0800 Subject: net: Kill skb_truesize_check(), it only catches false-positives. A long time ago we had bugs, primarily in TCP, where we would modify skb->truesize (for TSO queue collapsing) in ways which would corrupt the socket memory accounting. skb_truesize_check() was added in order to try and catch this error more systematically. However this debugging check has morphed into a Frankenstein of sorts and these days it does nothing other than catch false-positives. Signed-off-by: David S. Miller --- net/core/skbuff.c | 8 -------- net/core/sock.c | 1 - 2 files changed, 9 deletions(-) (limited to 'net') diff --git a/net/core/skbuff.c b/net/core/skbuff.c index da74b84..c6a6b16 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -143,14 +143,6 @@ void skb_under_panic(struct sk_buff *skb, int sz, void *here) BUG(); } -void skb_truesize_bug(struct sk_buff *skb) -{ - WARN(net_ratelimit(), KERN_ERR "SKB BUG: Invalid truesize (%u) " - "len=%u, sizeof(sk_buff)=%Zd\n", - skb->truesize, skb->len, sizeof(struct sk_buff)); -} -EXPORT_SYMBOL(skb_truesize_bug); - /* Allocate a new skbuff. We do this ourselves so we can fill in a few * 'private' fields and also do memory statistics to find all the * [BEEP] leaks. diff --git a/net/core/sock.c b/net/core/sock.c index 6f2e133..6e4f14d 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1137,7 +1137,6 @@ void sock_rfree(struct sk_buff *skb) { struct sock *sk = skb->sk; - skb_truesize_check(skb); atomic_sub(skb->truesize, &sk->sk_rmem_alloc); sk_mem_uncharge(skb->sk, skb->truesize); } -- cgit v1.1 From 4aa3b2ee1945ed082430ae1fb988d60eef64ca07 Mon Sep 17 00:00:00 2001 From: Eric Leblond Date: Wed, 18 Feb 2009 15:28:46 +0100 Subject: netfilter: nf_conntrack_ipv6: fix nf_log_packet message in icmpv6 conntrack This patch fixes a trivial typo that was adding a new line at end of the nf_log_packet() prefix. It also make the logging conditionnal by adding a LOG_INVALID test. Signed-off-by: Eric Leblond Signed-off-by: Patrick McHardy --- net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'net') diff --git a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c index c323643..72dbb6d 100644 --- a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c +++ b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c @@ -201,8 +201,9 @@ icmpv6_error(struct net *net, struct sk_buff *skb, unsigned int dataoff, if (net->ct.sysctl_checksum && hooknum == NF_INET_PRE_ROUTING && nf_ip6_checksum(skb, hooknum, dataoff, IPPROTO_ICMPV6)) { - nf_log_packet(PF_INET6, 0, skb, NULL, NULL, NULL, - "nf_ct_icmpv6: ICMPv6 checksum failed\n"); + if (LOG_INVALID(net, IPPROTO_ICMPV6)) + nf_log_packet(PF_INET6, 0, skb, NULL, NULL, NULL, + "nf_ct_icmpv6: ICMPv6 checksum failed "); return -NF_ACCEPT; } -- cgit v1.1 From 5ca431f9ae8db8c6edb9c64bebe6d6521077afd6 Mon Sep 17 00:00:00 2001 From: Eric Leblond Date: Wed, 18 Feb 2009 15:29:23 +0100 Subject: netfilter: nfnetlink_log: fix per-rule qthreshold override In NFLOG the per-rule qthreshold should overrides per-instance only it is set. With current code, the per-rule qthreshold is 1 if not set and it overrides the per-instance qthreshold. This patch modifies the default xt_NFLOG threshold from 1 to 0. Thus a value of 0 means there is no per-rule setting and the instance parameter has to apply. Signed-off-by: Eric Leblond Signed-off-by: Patrick McHardy --- net/netfilter/nfnetlink_log.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'net') diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c index fa49dc7..580b837 100644 --- a/net/netfilter/nfnetlink_log.c +++ b/net/netfilter/nfnetlink_log.c @@ -590,8 +590,10 @@ nfulnl_log_packet(u_int8_t pf, qthreshold = inst->qthreshold; /* per-rule qthreshold overrides per-instance */ - if (qthreshold > li->u.ulog.qthreshold) - qthreshold = li->u.ulog.qthreshold; + if (li->u.ulog.qthreshold) + if (qthreshold > li->u.ulog.qthreshold) + qthreshold = li->u.ulog.qthreshold; + switch (inst->copy_mode) { case NFULNL_COPY_META: -- cgit v1.1 From 2c6764b743f9d25dd0806a417f06920dcbd0f599 Mon Sep 17 00:00:00 2001 From: Eric Leblond Date: Wed, 18 Feb 2009 15:29:49 +0100 Subject: netfilter: nfnetlink_log: fix timeout handling NFLOG timeout was computed in timer by doing: flushtimeout*HZ/100 Default value of flushtimeout was HZ (for 1 second delay). This was wrong for non 100HZ computer. This patch modify the default delay by using 100 instead of HZ. Signed-off-by: Eric Leblond Signed-off-by: Patrick McHardy --- net/netfilter/nfnetlink_log.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net') diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c index 580b837..c712e9f 100644 --- a/net/netfilter/nfnetlink_log.c +++ b/net/netfilter/nfnetlink_log.c @@ -39,7 +39,7 @@ #endif #define NFULNL_NLBUFSIZ_DEFAULT NLMSG_GOODSIZE -#define NFULNL_TIMEOUT_DEFAULT HZ /* every second */ +#define NFULNL_TIMEOUT_DEFAULT 100 /* every second */ #define NFULNL_QTHRESH_DEFAULT 100 /* 100 packets */ #define NFULNL_COPY_RANGE_MAX 0xFFFF /* max packet size is limited by 16-bit struct nfattr nfa_len field */ -- cgit v1.1 From eb132205ca2f7ad44d8c8c482815b6911200b6a0 Mon Sep 17 00:00:00 2001 From: Jan Engelhardt Date: Wed, 18 Feb 2009 16:42:19 +0100 Subject: netfilter: make proc/net/ip* print names from foreign NFPROTO When extensions were moved to the NFPROTO_UNSPEC wildcard in ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, they disappeared from the procfs files. Signed-off-by: Jan Engelhardt Signed-off-by: Patrick McHardy --- net/netfilter/x_tables.c | 199 +++++++++++++++++++++++++++++++++-------------- 1 file changed, 142 insertions(+), 57 deletions(-) (limited to 'net') diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c index bfbf521..5baccfa 100644 --- a/net/netfilter/x_tables.c +++ b/net/netfilter/x_tables.c @@ -827,59 +827,143 @@ static const struct file_operations xt_table_ops = { .release = seq_release_net, }; -static void *xt_match_seq_start(struct seq_file *seq, loff_t *pos) +/* + * Traverse state for ip{,6}_{tables,matches} for helping crossing + * the multi-AF mutexes. + */ +struct nf_mttg_trav { + struct list_head *head, *curr; + uint8_t class, nfproto; +}; + +enum { + MTTG_TRAV_INIT, + MTTG_TRAV_NFP_UNSPEC, + MTTG_TRAV_NFP_SPEC, + MTTG_TRAV_DONE, +}; + +static void *xt_mttg_seq_next(struct seq_file *seq, void *v, loff_t *ppos, + bool is_target) { - struct proc_dir_entry *pde = (struct proc_dir_entry *)seq->private; - u_int16_t af = (unsigned long)pde->data; + static const uint8_t next_class[] = { + [MTTG_TRAV_NFP_UNSPEC] = MTTG_TRAV_NFP_SPEC, + [MTTG_TRAV_NFP_SPEC] = MTTG_TRAV_DONE, + }; + struct nf_mttg_trav *trav = seq->private; + + switch (trav->class) { + case MTTG_TRAV_INIT: + trav->class = MTTG_TRAV_NFP_UNSPEC; + mutex_lock(&xt[NFPROTO_UNSPEC].mutex); + trav->head = trav->curr = is_target ? + &xt[NFPROTO_UNSPEC].target : &xt[NFPROTO_UNSPEC].match; + break; + case MTTG_TRAV_NFP_UNSPEC: + trav->curr = trav->curr->next; + if (trav->curr != trav->head) + break; + mutex_unlock(&xt[NFPROTO_UNSPEC].mutex); + mutex_lock(&xt[trav->nfproto].mutex); + trav->head = trav->curr = is_target ? + &xt[trav->nfproto].target : &xt[trav->nfproto].match; + trav->class = next_class[trav->class]; + break; + case MTTG_TRAV_NFP_SPEC: + trav->curr = trav->curr->next; + if (trav->curr != trav->head) + break; + /* fallthru, _stop will unlock */ + default: + return NULL; + } - mutex_lock(&xt[af].mutex); - return seq_list_start(&xt[af].match, *pos); + if (ppos != NULL) + ++*ppos; + return trav; } -static void *xt_match_seq_next(struct seq_file *seq, void *v, loff_t *pos) +static void *xt_mttg_seq_start(struct seq_file *seq, loff_t *pos, + bool is_target) { - struct proc_dir_entry *pde = (struct proc_dir_entry *)seq->private; - u_int16_t af = (unsigned long)pde->data; + struct nf_mttg_trav *trav = seq->private; + unsigned int j; - return seq_list_next(v, &xt[af].match, pos); + trav->class = MTTG_TRAV_INIT; + for (j = 0; j < *pos; ++j) + if (xt_mttg_seq_next(seq, NULL, NULL, is_target) == NULL) + return NULL; + return trav; } -static void xt_match_seq_stop(struct seq_file *seq, void *v) +static void xt_mttg_seq_stop(struct seq_file *seq, void *v) { - struct proc_dir_entry *pde = seq->private; - u_int16_t af = (unsigned long)pde->data; + struct nf_mttg_trav *trav = seq->private; + + switch (trav->class) { + case MTTG_TRAV_NFP_UNSPEC: + mutex_unlock(&xt[NFPROTO_UNSPEC].mutex); + break; + case MTTG_TRAV_NFP_SPEC: + mutex_unlock(&xt[trav->nfproto].mutex); + break; + } +} - mutex_unlock(&xt[af].mutex); +static void *xt_match_seq_start(struct seq_file *seq, loff_t *pos) +{ + return xt_mttg_seq_start(seq, pos, false); } -static int xt_match_seq_show(struct seq_file *seq, void *v) +static void *xt_match_seq_next(struct seq_file *seq, void *v, loff_t *ppos) { - struct xt_match *match = list_entry(v, struct xt_match, list); + return xt_mttg_seq_next(seq, v, ppos, false); +} - if (strlen(match->name)) - return seq_printf(seq, "%s\n", match->name); - else - return 0; +static int xt_match_seq_show(struct seq_file *seq, void *v) +{ + const struct nf_mttg_trav *trav = seq->private; + const struct xt_match *match; + + switch (trav->class) { + case MTTG_TRAV_NFP_UNSPEC: + case MTTG_TRAV_NFP_SPEC: + if (trav->curr == trav->head) + return 0; + match = list_entry(trav->curr, struct xt_match, list); + return (*match->name == '\0') ? 0 : + seq_printf(seq, "%s\n", match->name); + } + return 0; } static const struct seq_operations xt_match_seq_ops = { .start = xt_match_seq_start, .next = xt_match_seq_next, - .stop = xt_match_seq_stop, + .stop = xt_mttg_seq_stop, .show = xt_match_seq_show, }; static int xt_match_open(struct inode *inode, struct file *file) { + struct seq_file *seq; + struct nf_mttg_trav *trav; int ret; - ret = seq_open(file, &xt_match_seq_ops); - if (!ret) { - struct seq_file *seq = file->private_data; + trav = kmalloc(sizeof(*trav), GFP_KERNEL); + if (trav == NULL) + return -ENOMEM; - seq->private = PDE(inode); + ret = seq_open(file, &xt_match_seq_ops); + if (ret < 0) { + kfree(trav); + return ret; } - return ret; + + seq = file->private_data; + seq->private = trav; + trav->nfproto = (unsigned long)PDE(inode)->data; + return 0; } static const struct file_operations xt_match_ops = { @@ -887,62 +971,63 @@ static const struct file_operations xt_match_ops = { .open = xt_match_open, .read = seq_read, .llseek = seq_lseek, - .release = seq_release, + .release = seq_release_private, }; static void *xt_target_seq_start(struct seq_file *seq, loff_t *pos) { - struct proc_dir_entry *pde = (struct proc_dir_entry *)seq->private; - u_int16_t af = (unsigned long)pde->data; - - mutex_lock(&xt[af].mutex); - return seq_list_start(&xt[af].target, *pos); + return xt_mttg_seq_start(seq, pos, true); } -static void *xt_target_seq_next(struct seq_file *seq, void *v, loff_t *pos) +static void *xt_target_seq_next(struct seq_file *seq, void *v, loff_t *ppos) { - struct proc_dir_entry *pde = (struct proc_dir_entry *)seq->private; - u_int16_t af = (unsigned long)pde->data; - - return seq_list_next(v, &xt[af].target, pos); -} - -static void xt_target_seq_stop(struct seq_file *seq, void *v) -{ - struct proc_dir_entry *pde = seq->private; - u_int16_t af = (unsigned long)pde->data; - - mutex_unlock(&xt[af].mutex); + return xt_mttg_seq_next(seq, v, ppos, true); } static int xt_target_seq_show(struct seq_file *seq, void *v) { - struct xt_target *target = list_entry(v, struct xt_target, list); - - if (strlen(target->name)) - return seq_printf(seq, "%s\n", target->name); - else - return 0; + const struct nf_mttg_trav *trav = seq->private; + const struct xt_target *target; + + switch (trav->class) { + case MTTG_TRAV_NFP_UNSPEC: + case MTTG_TRAV_NFP_SPEC: + if (trav->curr == trav->head) + return 0; + target = list_entry(trav->curr, struct xt_target, list); + return (*target->name == '\0') ? 0 : + seq_printf(seq, "%s\n", target->name); + } + return 0; } static const struct seq_operations xt_target_seq_ops = { .start = xt_target_seq_start, .next = xt_target_seq_next, - .stop = xt_target_seq_stop, + .stop = xt_mttg_seq_stop, .show = xt_target_seq_show, }; static int xt_target_open(struct inode *inode, struct file *file) { + struct seq_file *seq; + struct nf_mttg_trav *trav; int ret; - ret = seq_open(file, &xt_target_seq_ops); - if (!ret) { - struct seq_file *seq = file->private_data; + trav = kmalloc(sizeof(*trav), GFP_KERNEL); + if (trav == NULL) + return -ENOMEM; - seq->private = PDE(inode); + ret = seq_open(file, &xt_target_seq_ops); + if (ret < 0) { + kfree(trav); + return ret; } - return ret; + + seq = file->private_data; + seq->private = trav; + trav->nfproto = (unsigned long)PDE(inode)->data; + return 0; } static const struct file_operations xt_target_ops = { @@ -950,7 +1035,7 @@ static const struct file_operations xt_target_ops = { .open = xt_target_open, .read = seq_read, .llseek = seq_lseek, - .release = seq_release, + .release = seq_release_private, }; #define FORMAT_TABLES "_tables_names" -- cgit v1.1 From 5209921cf15452cbe43097afce11d2846630cb51 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Wed, 18 Feb 2009 17:45:44 -0800 Subject: tcp: remove obsoleted comment about different passes MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This is obsolete since the passes got combined. Signed-off-by: Ilpo Järvinen Signed-off-by: David S. Miller --- net/ipv4/tcp_output.c | 1 - 1 file changed, 1 deletion(-) (limited to 'net') diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index dda42f0..da2c3b8 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -2023,7 +2023,6 @@ void tcp_xmit_retransmit_queue(struct sock *sk) last_lost = tp->snd_una; } - /* First pass: retransmit lost packets. */ tcp_for_write_queue_from(skb, sk) { __u8 sacked = TCP_SKB_CB(skb)->sacked; -- cgit v1.1 From 486a87f1e5624096bd1c09e9e716239597d48dca Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Sun, 22 Feb 2009 00:07:53 -0800 Subject: netns: fix double free at netns creation This patch fix a double free when a network namespace fails. The previous code does a kfree of the net_generic structure when one of the init subsystem initialization fails. The 'setup_net' function does kfree(ng) and returns an error. The caller, 'copy_net_ns', call net_free on error, and this one calls kfree(net->gen), making this pointer freed twice. This patch make the code symetric, the net_alloc does the net_generic allocation and the net_free frees the net_generic. Signed-off-by: Daniel Lezcano Signed-off-by: David S. Miller --- net/core/net_namespace.c | 86 +++++++++++++++++++++++++++++++----------------- 1 file changed, 55 insertions(+), 31 deletions(-) (limited to 'net') diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index 55151fa..b0767ab 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -32,24 +32,14 @@ static __net_init int setup_net(struct net *net) { /* Must be called with net_mutex held */ struct pernet_operations *ops; - int error; - struct net_generic *ng; + int error = 0; atomic_set(&net->count, 1); + #ifdef NETNS_REFCNT_DEBUG atomic_set(&net->use_count, 0); #endif - error = -ENOMEM; - ng = kzalloc(sizeof(struct net_generic) + - INITIAL_NET_GEN_PTRS * sizeof(void *), GFP_KERNEL); - if (ng == NULL) - goto out; - - ng->len = INITIAL_NET_GEN_PTRS; - rcu_assign_pointer(net->gen, ng); - - error = 0; list_for_each_entry(ops, &pernet_list, list) { if (ops->init) { error = ops->init(net); @@ -70,7 +60,6 @@ out_undo: } rcu_barrier(); - kfree(ng); goto out; } @@ -78,16 +67,43 @@ out_undo: static struct kmem_cache *net_cachep; static struct workqueue_struct *netns_wq; -static struct net *net_alloc(void) +static struct net_generic *net_alloc_generic(void) { - return kmem_cache_zalloc(net_cachep, GFP_KERNEL); + struct net_generic *ng; + size_t generic_size = sizeof(struct net_generic) + + INITIAL_NET_GEN_PTRS * sizeof(void *); + + ng = kzalloc(generic_size, GFP_KERNEL); + if (ng) + ng->len = INITIAL_NET_GEN_PTRS; + + return ng; } -static void net_free(struct net *net) +static struct net *net_alloc(void) { + struct net *net = NULL; + struct net_generic *ng; + + ng = net_alloc_generic(); + if (!ng) + goto out; + + net = kmem_cache_zalloc(net_cachep, GFP_KERNEL); if (!net) - return; + goto out_free; + + rcu_assign_pointer(net->gen, ng); +out: + return net; + +out_free: + kfree(ng); + goto out; +} +static void net_free(struct net *net) +{ #ifdef NETNS_REFCNT_DEBUG if (unlikely(atomic_read(&net->use_count) != 0)) { printk(KERN_EMERG "network namespace not free! Usage: %d\n", @@ -112,27 +128,28 @@ struct net *copy_net_ns(unsigned long flags, struct net *old_net) err = -ENOMEM; new_net = net_alloc(); if (!new_net) - goto out; + goto out_err; mutex_lock(&net_mutex); err = setup_net(new_net); - if (err) - goto out_unlock; - - rtnl_lock(); - list_add_tail(&new_net->list, &net_namespace_list); - rtnl_unlock(); - - -out_unlock: + if (!err) { + rtnl_lock(); + list_add_tail(&new_net->list, &net_namespace_list); + rtnl_unlock(); + } mutex_unlock(&net_mutex); + + if (err) + goto out_free; out: put_net(old_net); - if (err) { - net_free(new_net); - new_net = ERR_PTR(err); - } return new_net; + +out_free: + net_free(new_net); +out_err: + new_net = ERR_PTR(err); + goto out; } static void cleanup_net(struct work_struct *work) @@ -188,6 +205,7 @@ struct net *copy_net_ns(unsigned long flags, struct net *old_net) static int __init net_ns_init(void) { + struct net_generic *ng; int err; printk(KERN_INFO "net_namespace: %zd bytes\n", sizeof(struct net)); @@ -202,6 +220,12 @@ static int __init net_ns_init(void) panic("Could not create netns workq"); #endif + ng = net_alloc_generic(); + if (!ng) + panic("Could not allocate generic netns"); + + rcu_assign_pointer(init_net.gen, ng); + mutex_lock(&net_mutex); err = setup_net(&init_net); -- cgit v1.1 From 586c25003707067f074043d80fb2071671c58db0 Mon Sep 17 00:00:00 2001 From: Paul Moore Date: Fri, 20 Feb 2009 16:32:55 -0500 Subject: cipso: Fix documentation comment The CIPSO protocol engine incorrectly stated that the FIPS-188 specification could be found in the kernel's Documentation directory. This patch corrects that by removing the comment and directing users to the FIPS-188 documented hosted online. For the sake of completeness I've also included a link to the CIPSO draft specification on the NetLabel website. Thanks to Randy Dunlap for spotting the error and letting me know. Signed-off-by: Paul Moore Signed-off-by: James Morris --- net/ipv4/cipso_ipv4.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'net') diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c index 6bb2635..7bc9929 100644 --- a/net/ipv4/cipso_ipv4.c +++ b/net/ipv4/cipso_ipv4.c @@ -3,11 +3,16 @@ * * This is an implementation of the CIPSO 2.2 protocol as specified in * draft-ietf-cipso-ipsecurity-01.txt with additional tag types as found in - * FIPS-188, copies of both documents can be found in the Documentation - * directory. While CIPSO never became a full IETF RFC standard many vendors + * FIPS-188. While CIPSO never became a full IETF RFC standard many vendors * have chosen to adopt the protocol and over the years it has become a * de-facto standard for labeled networking. * + * The CIPSO draft specification can be found in the kernel's Documentation + * directory as well as the following URL: + * http://netlabel.sourceforge.net/files/draft-ietf-cipso-ipsecurity-01.txt + * The FIPS-188 specification can be found at the following URL: + * http://www.itl.nist.gov/fipspubs/fip188.htm + * * Author: Paul Moore * */ -- cgit v1.1 From ebe47d47b7b7fed72dabcce4717da727b4e2367d Mon Sep 17 00:00:00 2001 From: Clemens Noss Date: Mon, 23 Feb 2009 15:37:35 -0800 Subject: netns: build fix for net_alloc_generic net_alloc_generic was defined in #ifdef CONFIG_NET_NS, but used unconditionally. Move net_alloc_generic out of #ifdef. Signed-off-by: Clemens Noss Signed-off-by: David S. Miller --- net/core/net_namespace.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'net') diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index b0767ab..2adb1a7 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -63,10 +63,6 @@ out_undo: goto out; } -#ifdef CONFIG_NET_NS -static struct kmem_cache *net_cachep; -static struct workqueue_struct *netns_wq; - static struct net_generic *net_alloc_generic(void) { struct net_generic *ng; @@ -80,6 +76,10 @@ static struct net_generic *net_alloc_generic(void) return ng; } +#ifdef CONFIG_NET_NS +static struct kmem_cache *net_cachep; +static struct workqueue_struct *netns_wq; + static struct net *net_alloc(void) { struct net *net = NULL; -- cgit v1.1 From 50fee1dec5d71b8a14c1b82f2f42e16adc227f8b Mon Sep 17 00:00:00 2001 From: Eugene Teo Date: Mon, 23 Feb 2009 15:38:41 -0800 Subject: net: amend the fix for SO_BSDCOMPAT gsopt infoleak The fix for CVE-2009-0676 (upstream commit df0bca04) is incomplete. Note that the same problem of leaking kernel memory will reappear if someone on some architecture uses struct timeval with some internal padding (for example tv_sec 64-bit and tv_usec 32-bit) --- then, you are going to leak the padded bytes to userspace. Signed-off-by: Eugene Teo Reported-by: Mikulas Patocka Signed-off-by: David S. Miller --- net/core/sock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net') diff --git a/net/core/sock.c b/net/core/sock.c index 6e4f14d..5f97caa 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -696,7 +696,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname, if (len < 0) return -EINVAL; - v.val = 0; + memset(&v, 0, sizeof(v)); switch(optname) { case SO_DEBUG: -- cgit v1.1 From 325fb5b4d26038cba665dd0d8ee09555321061f0 Mon Sep 17 00:00:00 2001 From: Josef Drexler Date: Tue, 24 Feb 2009 14:53:12 +0100 Subject: netfilter: xt_recent: fix proc-file addition/removal of IPv4 addresses Fix regression introduded by commit 079aa88 (netfilter: xt_recent: IPv6 support): From http://bugzilla.kernel.org/show_bug.cgi?id=12753: Problem Description: An uninitialized buffer causes IPv4 addresses added manually (via the +IP command to the proc interface) to never match any packets. Similarly, the -IP command fails to remove IPv4 addresses. Details: In the function recent_entry_lookup, the xt_recent module does comparisons of the entire nf_inet_addr union value, both for IPv4 and IPv6 addresses. For addresses initialized from actual packets the remaining 12 bytes not occupied by the IPv4 are zeroed so this works correctly. However when setting the nf_inet_addr addr variable in the recent_mt_proc_write function, only the IPv4 bytes are initialized and the remaining 12 bytes contain garbage. Hence addresses added in this way never match any packets, unless these uninitialized 12 bytes happened to be zero by coincidence. Similarly, addresses cannot consistently be removed using the proc interface due to mismatch of the garbage bytes (although it will sometimes work to remove an address that was added manually). Reading the /proc/net/xt_recent/ entries hides this problem because this only uses the first 4 bytes when displaying IPv4 addresses. Steps to reproduce: $ iptables -I INPUT -m recent --rcheck -j LOG $ echo +169.254.156.239 > /proc/net/xt_recent/DEFAULT $ cat /proc/net/xt_recent/DEFAULT src=169.254.156.239 ttl: 0 last_seen: 119910 oldest_pkt: 1 119910 [At this point no packets from 169.254.156.239 are being logged.] $ iptables -I INPUT -s 169.254.156.239 -m recent --set $ cat /proc/net/xt_recent/DEFAULT src=169.254.156.239 ttl: 0 last_seen: 119910 oldest_pkt: 1 119910 src=169.254.156.239 ttl: 255 last_seen: 126184 oldest_pkt: 4 125434, 125684, 125934, 126184 [At this point, adding the address via an iptables rule, packets are being logged correctly.] $ echo -169.254.156.239 > /proc/net/xt_recent/DEFAULT $ cat /proc/net/xt_recent/DEFAULT src=169.254.156.239 ttl: 0 last_seen: 119910 oldest_pkt: 1 119910 src=169.254.156.239 ttl: 255 last_seen: 126992 oldest_pkt: 10 125434, 125684, 125934, 126184, 126434, 126684, 126934, 126991, 126991, 126992 $ echo -169.254.156.239 > /proc/net/xt_recent/DEFAULT $ cat /proc/net/xt_recent/DEFAULT src=169.254.156.239 ttl: 0 last_seen: 119910 oldest_pkt: 1 119910 src=169.254.156.239 ttl: 255 last_seen: 126992 oldest_pkt: 10 125434, 125684, 125934, 126184, 126434, 126684, 126934, 126991, 126991, 126992 [Removing the address via /proc interface failed evidently.] Possible solutions: - initialize the addr variable in recent_mt_proc_write - compare only 4 bytes for IPv4 addresses in recent_entry_lookup Signed-off-by: Patrick McHardy --- net/netfilter/xt_recent.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net') diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c index fe80b61..791e030 100644 --- a/net/netfilter/xt_recent.c +++ b/net/netfilter/xt_recent.c @@ -542,7 +542,7 @@ recent_mt_proc_write(struct file *file, const char __user *input, struct recent_entry *e; char buf[sizeof("+b335:1d35:1e55:dead:c0de:1715:5afe:c0de")]; const char *c = buf; - union nf_inet_addr addr; + union nf_inet_addr addr = {}; u_int16_t family; bool add, succ; -- cgit v1.1 From a52b8bd338630f78a6bfe39fe17cb8469d2679ae Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Tue, 24 Feb 2009 16:40:16 -0800 Subject: tcp_scalable: Update malformed & dead url Signed-off-by: Joe Perches Signed-off-by: David S. Miller --- net/ipv4/tcp_scalable.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net') diff --git a/net/ipv4/tcp_scalable.c b/net/ipv4/tcp_scalable.c index 2747ec7..4660b08 100644 --- a/net/ipv4/tcp_scalable.c +++ b/net/ipv4/tcp_scalable.c @@ -1,6 +1,6 @@ /* Tom Kelly's Scalable TCP * - * See htt://www-lce.eng.cam.ac.uk/~ctk21/scalable/ + * See http://www.deneholme.net/tom/scalable/ * * John Heffner */ -- cgit v1.1 From 3f53a38131a4e7a053c0aa060aba0411242fb6b9 Mon Sep 17 00:00:00 2001 From: Pavel Emelyanov Date: Thu, 26 Feb 2009 03:35:13 -0800 Subject: ipv6: don't use tw net when accounting for recycled tw We already have a valid net in that place, but this is not just a cleanup - the tw pointer can be NULL there sometimes, thus causing an oops in NET_NS=y case. The same place in ipv4 code already works correctly using existing net, rather than tw's one. The bug exists since 2.6.27. Signed-off-by: Pavel Emelyanov Signed-off-by: David S. Miller --- net/ipv6/inet6_hashtables.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net') diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c index 8fe267f..1bcc343 100644 --- a/net/ipv6/inet6_hashtables.c +++ b/net/ipv6/inet6_hashtables.c @@ -258,11 +258,11 @@ unique: if (twp != NULL) { *twp = tw; - NET_INC_STATS_BH(twsk_net(tw), LINUX_MIB_TIMEWAITRECYCLED); + NET_INC_STATS_BH(net, LINUX_MIB_TIMEWAITRECYCLED); } else if (tw != NULL) { /* Silly. Should hash-dance instead... */ inet_twsk_deschedule(tw, death_row); - NET_INC_STATS_BH(twsk_net(tw), LINUX_MIB_TIMEWAITRECYCLED); + NET_INC_STATS_BH(net, LINUX_MIB_TIMEWAITRECYCLED); inet_twsk_put(tw); } -- cgit v1.1 From 1844f747947bb89d7f12cd3034548805113f764b Mon Sep 17 00:00:00 2001 From: Jarek Poplawski Date: Fri, 27 Feb 2009 02:42:38 -0800 Subject: pkt_sched: sch_drr: Fix oops in drr_change_class. drr_change_class lacks a check for NULL of tca[TCA_OPTIONS], so oops is possible. Reported-by: Denys Fedoryschenko Signed-off-by: Jarek Poplawski Signed-off-by: David S. Miller --- net/sched/sch_drr.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'net') diff --git a/net/sched/sch_drr.c b/net/sched/sch_drr.c index f6b4fa9..e36e94a 100644 --- a/net/sched/sch_drr.c +++ b/net/sched/sch_drr.c @@ -66,11 +66,15 @@ static int drr_change_class(struct Qdisc *sch, u32 classid, u32 parentid, { struct drr_sched *q = qdisc_priv(sch); struct drr_class *cl = (struct drr_class *)*arg; + struct nlattr *opt = tca[TCA_OPTIONS]; struct nlattr *tb[TCA_DRR_MAX + 1]; u32 quantum; int err; - err = nla_parse_nested(tb, TCA_DRR_MAX, tca[TCA_OPTIONS], drr_policy); + if (!opt) + return -EINVAL; + + err = nla_parse_nested(tb, TCA_DRR_MAX, opt, drr_policy); if (err < 0) return err; -- cgit v1.1 From 4ead443163b798661c2a2ede5e512e116a9e41e7 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Sun, 1 Mar 2009 00:11:52 -0800 Subject: netpoll: Add drop checks to all entry points The netpoll entry checks are required to ensure that we don't receive normal packets when invoked via netpoll. Unfortunately it only ever worked for the netif_receive_skb/netif_rx entry points. The VLAN (and subsequently GRO) entry point didn't have the check and therefore can trigger all sorts of weird problems. This patch adds the netpoll check to all entry points. I'm still uneasy with receiving at all under netpoll (which apparently is only used by the out-of-tree kdump code). The reason is it is perfectly legal to receive all data including headers into highmem if netpoll is off, but if you try to do that with netpoll on and someone gets a printk in an IRQ handler you're going to get a nice BUG_ON. Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/8021q/vlan_core.c | 10 ++++++++++ net/core/dev.c | 6 ++++++ 2 files changed, 16 insertions(+) (limited to 'net') diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c index e9db889..2886d2f 100644 --- a/net/8021q/vlan_core.c +++ b/net/8021q/vlan_core.c @@ -1,12 +1,16 @@ #include #include #include +#include #include "vlan.h" /* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */ int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp, u16 vlan_tci, int polling) { + if (netpoll_rx(skb)) + return NET_RX_DROP; + if (skb_bond_should_drop(skb)) goto drop; @@ -100,6 +104,9 @@ int vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp, { int err = NET_RX_SUCCESS; + if (netpoll_receive_skb(skb)) + return NET_RX_DROP; + switch (vlan_gro_common(napi, grp, vlan_tci, skb)) { case -1: return netif_receive_skb(skb); @@ -126,6 +133,9 @@ int vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp, if (!skb) goto out; + if (netpoll_receive_skb(skb)) + goto out; + err = NET_RX_SUCCESS; switch (vlan_gro_common(napi, grp, vlan_tci, skb)) { diff --git a/net/core/dev.c b/net/core/dev.c index a17e006..72b0d26f 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2488,6 +2488,9 @@ static int __napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb) int napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb) { + if (netpoll_receive_skb(skb)) + return NET_RX_DROP; + switch (__napi_gro_receive(napi, skb)) { case -1: return netif_receive_skb(skb); @@ -2558,6 +2561,9 @@ int napi_gro_frags(struct napi_struct *napi, struct napi_gro_fraginfo *info) if (!skb) goto out; + if (netpoll_receive_skb(skb)) + goto out; + err = NET_RX_SUCCESS; switch (__napi_gro_receive(napi, skb)) { -- cgit v1.1 From 9ec06ff57a9badef3b6b019f35efc6b21fc27d03 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Sun, 1 Mar 2009 00:21:36 -0800 Subject: tcp: fix retrans_out leaks MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit There's conflicting assumptions in shifting, the caller assumes that dupsack results in S'ed skbs (or a part of it) for sure but never gave a hint to tcp_sacktag_one when dsack is actually in use. Thus DSACK retrans_out -= pcount was not taken and the counter became out of sync. Remove obstacle from that information flow to get DSACKs accounted in tcp_sacktag_one as expected. Signed-off-by: Ilpo Järvinen Tested-by: Denys Fedoryshchenko Signed-off-by: David S. Miller --- net/ipv4/tcp_input.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'net') diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index a6961d7..c28976a7 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -1374,7 +1374,8 @@ static u8 tcp_sacktag_one(struct sk_buff *skb, struct sock *sk, static int tcp_shifted_skb(struct sock *sk, struct sk_buff *skb, struct tcp_sacktag_state *state, - unsigned int pcount, int shifted, int mss) + unsigned int pcount, int shifted, int mss, + int dup_sack) { struct tcp_sock *tp = tcp_sk(sk); struct sk_buff *prev = tcp_write_queue_prev(sk, skb); @@ -1410,7 +1411,7 @@ static int tcp_shifted_skb(struct sock *sk, struct sk_buff *skb, } /* We discard results */ - tcp_sacktag_one(skb, sk, state, 0, pcount); + tcp_sacktag_one(skb, sk, state, dup_sack, pcount); /* Difference in this won't matter, both ACKed by the same cumul. ACK */ TCP_SKB_CB(prev)->sacked |= (TCP_SKB_CB(skb)->sacked & TCPCB_EVER_RETRANS); @@ -1561,7 +1562,7 @@ static struct sk_buff *tcp_shift_skb_data(struct sock *sk, struct sk_buff *skb, if (!skb_shift(prev, skb, len)) goto fallback; - if (!tcp_shifted_skb(sk, skb, state, pcount, len, mss)) + if (!tcp_shifted_skb(sk, skb, state, pcount, len, mss, dup_sack)) goto out; /* Hole filled allows collapsing with the next as well, this is very @@ -1580,7 +1581,7 @@ static struct sk_buff *tcp_shift_skb_data(struct sock *sk, struct sk_buff *skb, len = skb->len; if (skb_shift(prev, skb, len)) { pcount += tcp_skb_pcount(skb); - tcp_shifted_skb(sk, skb, state, tcp_skb_pcount(skb), len, mss); + tcp_shifted_skb(sk, skb, state, tcp_skb_pcount(skb), len, mss, 0); } out: -- cgit v1.1 From d1dd524785e30cf3d64d395d829b207376acb0aa Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Mon, 2 Mar 2009 06:46:50 +0000 Subject: sctp: fix crash during module unload An extra list_del() during the module load failure and unload resulted in a crash with a list corruption. Now sctp can be unloaded again. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/sctp/protocol.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) (limited to 'net') diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c index b78e3be..4e66384 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -1322,9 +1322,8 @@ SCTP_STATIC __init int sctp_init(void) out: return status; err_v6_add_protocol: - sctp_v6_del_protocol(); -err_add_protocol: sctp_v4_del_protocol(); +err_add_protocol: inet_ctl_sock_destroy(sctp_ctl_sock); err_ctl_sock_init: sctp_v6_protosw_exit(); @@ -1335,7 +1334,6 @@ err_protosw_init: sctp_v4_pf_exit(); sctp_v6_pf_exit(); sctp_sysctl_unregister(); - list_del(&sctp_af_inet.list); free_pages((unsigned long)sctp_port_hashtable, get_order(sctp_port_hashsize * sizeof(struct sctp_bind_hashbucket))); @@ -1383,7 +1381,6 @@ SCTP_STATIC __exit void sctp_exit(void) sctp_v4_pf_exit(); sctp_sysctl_unregister(); - list_del(&sctp_af_inet.list); free_pages((unsigned long)sctp_assoc_hashtable, get_order(sctp_assoc_hashsize * -- cgit v1.1 From 3df2678737974accf437dad11e584c1871a3ede3 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Mon, 2 Mar 2009 06:46:51 +0000 Subject: sctp: fix kernel panic with ERROR chunk containing too many error causes If ERROR chunk is received with too many error causes in ESTABLISHED state, the kernel get panic. This is because sctp limit the max length of cmds to 14, but while ERROR chunk is received, one error cause will add around 2 cmds by sctp_add_cmd_sf(). So many error causes will fill the limit of cmds and panic. This patch fixed the problem. This bug can be test by SCTP Conformance Test Suite . Signed-off-by: Wei Yongjun Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/sctp/sm_sideeffect.c | 54 +++++++++++++++++++++++++++++------------------- net/sctp/sm_statefuns.c | 16 ++------------ 2 files changed, 35 insertions(+), 35 deletions(-) (limited to 'net') diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c index e1d6076..b5495ae 100644 --- a/net/sctp/sm_sideeffect.c +++ b/net/sctp/sm_sideeffect.c @@ -787,36 +787,48 @@ static void sctp_cmd_process_operr(sctp_cmd_seq_t *cmds, struct sctp_association *asoc, struct sctp_chunk *chunk) { - struct sctp_operr_chunk *operr_chunk; struct sctp_errhdr *err_hdr; + struct sctp_ulpevent *ev; - operr_chunk = (struct sctp_operr_chunk *)chunk->chunk_hdr; - err_hdr = &operr_chunk->err_hdr; + while (chunk->chunk_end > chunk->skb->data) { + err_hdr = (struct sctp_errhdr *)(chunk->skb->data); - switch (err_hdr->cause) { - case SCTP_ERROR_UNKNOWN_CHUNK: - { - struct sctp_chunkhdr *unk_chunk_hdr; + ev = sctp_ulpevent_make_remote_error(asoc, chunk, 0, + GFP_ATOMIC); + if (!ev) + return; - unk_chunk_hdr = (struct sctp_chunkhdr *)err_hdr->variable; - switch (unk_chunk_hdr->type) { - /* ADDIP 4.1 A9) If the peer responds to an ASCONF with an - * ERROR chunk reporting that it did not recognized the ASCONF - * chunk type, the sender of the ASCONF MUST NOT send any - * further ASCONF chunks and MUST stop its T-4 timer. - */ - case SCTP_CID_ASCONF: - asoc->peer.asconf_capable = 0; - sctp_add_cmd_sf(cmds, SCTP_CMD_TIMER_STOP, + sctp_ulpq_tail_event(&asoc->ulpq, ev); + + switch (err_hdr->cause) { + case SCTP_ERROR_UNKNOWN_CHUNK: + { + sctp_chunkhdr_t *unk_chunk_hdr; + + unk_chunk_hdr = (sctp_chunkhdr_t *)err_hdr->variable; + switch (unk_chunk_hdr->type) { + /* ADDIP 4.1 A9) If the peer responds to an ASCONF with + * an ERROR chunk reporting that it did not recognized + * the ASCONF chunk type, the sender of the ASCONF MUST + * NOT send any further ASCONF chunks and MUST stop its + * T-4 timer. + */ + case SCTP_CID_ASCONF: + if (asoc->peer.asconf_capable == 0) + break; + + asoc->peer.asconf_capable = 0; + sctp_add_cmd_sf(cmds, SCTP_CMD_TIMER_STOP, SCTP_TO(SCTP_EVENT_TIMEOUT_T4_RTO)); + break; + default: + break; + } break; + } default: break; } - break; - } - default: - break; } } diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index 3a0cd07..f88dfde 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -3163,7 +3163,6 @@ sctp_disposition_t sctp_sf_operr_notify(const struct sctp_endpoint *ep, sctp_cmd_seq_t *commands) { struct sctp_chunk *chunk = arg; - struct sctp_ulpevent *ev; if (!sctp_vtag_verify(chunk, asoc)) return sctp_sf_pdiscard(ep, asoc, type, arg, commands); @@ -3173,21 +3172,10 @@ sctp_disposition_t sctp_sf_operr_notify(const struct sctp_endpoint *ep, return sctp_sf_violation_chunklen(ep, asoc, type, arg, commands); - while (chunk->chunk_end > chunk->skb->data) { - ev = sctp_ulpevent_make_remote_error(asoc, chunk, 0, - GFP_ATOMIC); - if (!ev) - goto nomem; + sctp_add_cmd_sf(commands, SCTP_CMD_PROCESS_OPERR, + SCTP_CHUNK(chunk)); - sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP, - SCTP_ULPEVENT(ev)); - sctp_add_cmd_sf(commands, SCTP_CMD_PROCESS_OPERR, - SCTP_CHUNK(chunk)); - } return SCTP_DISPOSITION_CONSUME; - -nomem: - return SCTP_DISPOSITION_NOMEM; } /* -- cgit v1.1 From 5a5990d3090b03745a9548a6f5edef02095675cf Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Thu, 26 Feb 2009 06:49:24 +0000 Subject: net: Avoid race between network down and sysfs Signed-off-by: Stephen Hemminger Acked-by: "Eric W. Biederman" Signed-off-by: David S. Miller --- net/core/net-sysfs.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'net') diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index 6ac29a4..484f587 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -77,7 +77,9 @@ static ssize_t netdev_store(struct device *dev, struct device_attribute *attr, if (endp == buf) goto err; - rtnl_lock(); + if (!rtnl_trylock()) + return -ERESTARTSYS; + if (dev_isalive(net)) { if ((ret = (*set)(net, new)) == 0) ret = len; -- cgit v1.1 From b325fddb7f869e6c95a88dc6573220f162e5b89f Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Thu, 26 Feb 2009 06:55:31 +0000 Subject: ipv6: Fix sysctl unregistration deadlock Signed-off-by: David S. Miller --- net/ipv6/addrconf.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'net') diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index f9afb45..40fabde 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -493,15 +493,17 @@ static void addrconf_forward_change(struct net *net, __s32 newf) read_unlock(&dev_base_lock); } -static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) +static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) { struct net *net; net = (struct net *)table->extra2; if (p == &net->ipv6.devconf_dflt->forwarding) - return; + return 0; + + if (!rtnl_trylock()) + return -ERESTARTSYS; - rtnl_lock(); if (p == &net->ipv6.devconf_all->forwarding) { __s32 newf = net->ipv6.devconf_all->forwarding; net->ipv6.devconf_dflt->forwarding = newf; @@ -512,6 +514,7 @@ static void addrconf_fixup_forwarding(struct ctl_table *table, int *p, int old) if (*p) rt6_purge_dflt_routers(net); + return 1; } #endif @@ -3983,7 +3986,7 @@ int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp, ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); if (write) - addrconf_fixup_forwarding(ctl, valp, val); + ret = addrconf_fixup_forwarding(ctl, valp, val); return ret; } @@ -4019,8 +4022,7 @@ static int addrconf_sysctl_forward_strategy(ctl_table *table, } *valp = new; - addrconf_fixup_forwarding(table, valp, val); - return 1; + return addrconf_fixup_forwarding(table, valp, val); } static struct addrconf_sysctl_table -- cgit v1.1 From 176c39af29bc4edaf37f663553eeaacd47b5bc9c Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Tue, 3 Mar 2009 01:06:45 -0800 Subject: netns: fix addrconf_ifdown kernel panic When a network namespace is destroyed the network interfaces are all unregistered, making addrconf_ifdown called by the netdevice notifier. In the other hand, the addrconf exit method does a loop on the network devices and does addrconf_ifdown on each of them. But the ordering of the netns subsystem is not right because it uses the register_pernet_device instead of register_pernet_subsys. If we handle the loopback as any network device, we can safely use register_pernet_subsys. But if we use register_pernet_subsys, the addrconf exit method will do exactly what was already done with the unregistering of the network devices. So in definitive, this code is pointless. I removed the netns addrconf exit method and moved the code to the addrconf cleanup function. Signed-off-by: Daniel Lezcano Signed-off-by: David S. Miller --- net/ipv6/addrconf.c | 39 +++++++++------------------------------ 1 file changed, 9 insertions(+), 30 deletions(-) (limited to 'net') diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 40fabde..1220e2c 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -2611,9 +2611,6 @@ static int addrconf_ifdown(struct net_device *dev, int how) ASSERT_RTNL(); - if ((dev->flags & IFF_LOOPBACK) && how == 1) - how = 0; - rt6_ifdown(net, dev); neigh_ifdown(&nd_tbl, dev); @@ -4448,25 +4445,6 @@ int unregister_inet6addr_notifier(struct notifier_block *nb) EXPORT_SYMBOL(unregister_inet6addr_notifier); -static void addrconf_net_exit(struct net *net) -{ - struct net_device *dev; - - rtnl_lock(); - /* clean dev list */ - for_each_netdev(net, dev) { - if (__in6_dev_get(dev) == NULL) - continue; - addrconf_ifdown(dev, 1); - } - addrconf_ifdown(net->loopback_dev, 2); - rtnl_unlock(); -} - -static struct pernet_operations addrconf_net_ops = { - .exit = addrconf_net_exit, -}; - /* * Init / cleanup code */ @@ -4508,10 +4486,6 @@ int __init addrconf_init(void) if (err) goto errlo; - err = register_pernet_device(&addrconf_net_ops); - if (err) - return err; - register_netdevice_notifier(&ipv6_dev_notf); addrconf_verify(0); @@ -4541,15 +4515,22 @@ errlo: void addrconf_cleanup(void) { struct inet6_ifaddr *ifa; + struct net_device *dev; int i; unregister_netdevice_notifier(&ipv6_dev_notf); - unregister_pernet_device(&addrconf_net_ops); - unregister_pernet_subsys(&addrconf_ops); rtnl_lock(); + /* clean dev list */ + for_each_netdev(&init_net, dev) { + if (__in6_dev_get(dev) == NULL) + continue; + addrconf_ifdown(dev, 1); + } + addrconf_ifdown(init_net.loopback_dev, 2); + /* * Check hash table. */ @@ -4570,6 +4551,4 @@ void addrconf_cleanup(void) del_timer(&addr_chk_timer); rtnl_unlock(); - - unregister_pernet_subsys(&addrconf_net_ops); } -- cgit v1.1 From 6eb0777228f31932fc941eafe8b08848466630a1 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Sun, 22 Feb 2009 00:09:14 -0800 Subject: netns: Fix icmp shutdown. Recently I had a kernel panic in icmp_send during a network namespace cleanup. There were packets in the arp queue that failed to be sent and we attempted to generate an ICMP host unreachable message, but failed because icmp_sk_exit had already been called. The network devices are removed from a network namespace and their arp queues are flushed before we do attempt to shutdown subsystems so this error should have been impossible. It turns out icmp_init is using register_pernet_device instead of register_pernet_subsys. Which resulted in icmp being shut down while we still had the possibility of packets in flight, making a nasty NULL pointer deference in interrupt context possible. Changing this to register_pernet_subsys fixes the problem in my testing. Signed-off-by: Eric W. Biederman Acked-by: Denis V. Lunev Signed-off-by: David S. Miller --- net/ipv4/icmp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net') diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index 705b33b..fc562d2 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -1205,7 +1205,7 @@ static struct pernet_operations __net_initdata icmp_sk_ops = { int __init icmp_init(void) { - return register_pernet_device(&icmp_sk_ops); + return register_pernet_subsys(&icmp_sk_ops); } EXPORT_SYMBOL(icmp_err_convert); -- cgit v1.1 From 2f20d2e667ab1ca44cde5fb361386dff5bb6081d Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Sun, 22 Feb 2009 00:10:18 -0800 Subject: tcp: Like icmp use register_pernet_subsys To remove the possibility of packets flying around when network devices are being cleaned up use reisger_pernet_subsys instead of register_pernet_device. Signed-off-by: Eric W. Biederman Acked-by: Denis V. Lunev Signed-off-by: David S. Miller --- net/ipv4/tcp_ipv4.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net') diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 19d7b42..cf74c41 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -2443,7 +2443,7 @@ static struct pernet_operations __net_initdata tcp_sk_ops = { void __init tcp_v4_init(void) { inet_hashinfo_init(&tcp_hashinfo); - if (register_pernet_device(&tcp_sk_ops)) + if (register_pernet_subsys(&tcp_sk_ops)) panic("Failed to create the TCP control socket.\n"); } -- cgit v1.1 From 17edde520927070a6bf14a6a75027c0b843443e5 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Sun, 22 Feb 2009 00:11:09 -0800 Subject: netns: Remove net_alive It turns out that net_alive is unnecessary, and the original problem that led to it being added was simply that the icmp code thought it was a network device and wound up being unable to handle packets while there were still packets in the network namespace. Now that icmp and tcp have been fixed to properly register themselves this problem is no longer present and we have a stronger guarantee that packets will not arrive in a network namespace then that provided by net_alive in netif_receive_skb. So remove net_alive allowing packet reception run a little faster. Additionally document the strong reason why network namespace cleanup is safe so that if something happens again someone else will have a chance of figuring it out. Signed-off-by: Eric W. Biederman Signed-off-by: David S. Miller --- net/core/dev.c | 6 ------ net/core/net_namespace.c | 3 --- 2 files changed, 9 deletions(-) (limited to 'net') diff --git a/net/core/dev.c b/net/core/dev.c index 72b0d26f..9e4afe6 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2267,12 +2267,6 @@ int netif_receive_skb(struct sk_buff *skb) rcu_read_lock(); - /* Don't receive packets in an exiting network namespace */ - if (!net_alive(dev_net(skb->dev))) { - kfree_skb(skb); - goto out; - } - #ifdef CONFIG_NET_CLS_ACT if (skb->tc_verd & TC_NCLS) { skb->tc_verd = CLR_TC_NCLS(skb->tc_verd); diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index 2adb1a7..e3bebd3 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -157,9 +157,6 @@ static void cleanup_net(struct work_struct *work) struct pernet_operations *ops; struct net *net; - /* Be very certain incoming network packets will not find us */ - rcu_barrier(); - net = container_of(work, struct net, work); mutex_lock(&net_mutex); -- cgit v1.1 From 4843b93c96ae5043c6279c4ec6fcd8ee3866ff5b Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Tue, 3 Mar 2009 23:37:30 -0800 Subject: netlink: invert error code in netlink_set_err() The callers of netlink_set_err() currently pass a negative value as parameter for the error code. However, sk->sk_err wants a positive error value. Without this patch, skb_recv_datagram() called by netlink_recvmsg() may return a positive value to report an error. Another choice to fix this is to change callers to pass a positive error value, but this seems a bit inconsistent and error prone to me. Indeed, the callers of netlink_set_err() assumed that the (usual) negative value for error codes was fine before this patch :). This patch also includes some documentation in docbook format for netlink_set_err() to avoid this sort of confusion. Signed-off-by: Pablo Neira Ayuso Signed-off-by: David S. Miller --- net/netlink/af_netlink.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'net') diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index 9eb895c..3ae3cb8 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1084,6 +1084,13 @@ out: return 0; } +/** + * netlink_set_err - report error to broadcast listeners + * @ssk: the kernel netlink socket, as returned by netlink_kernel_create() + * @pid: the PID of a process that we want to skip (if any) + * @groups: the broadcast group that will notice the error + * @code: error code, must be negative (as usual in kernelspace) + */ void netlink_set_err(struct sock *ssk, u32 pid, u32 group, int code) { struct netlink_set_err_data info; @@ -1093,7 +1100,8 @@ void netlink_set_err(struct sock *ssk, u32 pid, u32 group, int code) info.exclude_sk = ssk; info.pid = pid; info.group = group; - info.code = code; + /* sk->sk_err wants a positive error value */ + info.code = -code; read_lock(&nl_table_lock); -- cgit v1.1 From 4222474519ff5b31a526dfa1da7aa4b0e38bef5c Mon Sep 17 00:00:00 2001 From: Meelis Roos Date: Tue, 3 Mar 2009 23:48:50 -0800 Subject: net: fix tokenring license Currently, modular tokenring ("tr") lacks a license and fails to load: tr: module license 'unspecified' taints kernel. tr: Unknown symbol proc_net_fops_create Beacuse of this, no tokenring driver can load if it depends on modular tr. Fix this by adding GPL module license as it is in the kernel. With this fix, tr module loads fine and tms380 driver also loads. Well, it does'nt work but that's a different bug. Signed-off-by: Meelis Roos Signed-off-by: David S. Miller --- net/802/tr.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net') diff --git a/net/802/tr.c b/net/802/tr.c index 158150f..f47ae28 100644 --- a/net/802/tr.c +++ b/net/802/tr.c @@ -668,3 +668,5 @@ module_init(rif_init); EXPORT_SYMBOL(tr_type_trans); EXPORT_SYMBOL(alloc_trdev); + +MODULE_LICENSE("GPL"); -- cgit v1.1 From fe7ca2e1e847b65c12d245cbf402af89da96888a Mon Sep 17 00:00:00 2001 From: Brian Haley Date: Wed, 4 Mar 2009 03:18:11 -0800 Subject: IPv6: add "disable" module parameter support to ipv6.ko Add "disable" module parameter support to ipv6.ko by specifying "disable=1" on module load. We just do the minimum of initializing inetsw6[] so calls from other modules to inet6_register_protosw() won't OOPs, then bail out. No IPv6 addresses or sockets can be created as a result, and a reboot is required to enable IPv6. Signed-off-by: Brian Haley Signed-off-by: David S. Miller --- net/ipv6/af_inet6.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) (limited to 'net') diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index c802bc1..da944ec 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -72,6 +72,10 @@ MODULE_LICENSE("GPL"); static struct list_head inetsw6[SOCK_MAX]; static DEFINE_SPINLOCK(inetsw6_lock); +static int disable_ipv6 = 0; +module_param_named(disable, disable_ipv6, int, 0); +MODULE_PARM_DESC(disable, "Disable IPv6 such that it is non-functional"); + static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) { const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo); @@ -991,10 +995,21 @@ static int __init inet6_init(void) { struct sk_buff *dummy_skb; struct list_head *r; - int err; + int err = 0; BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb)); + /* Register the socket-side information for inet6_create. */ + for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) + INIT_LIST_HEAD(r); + + if (disable_ipv6) { + printk(KERN_INFO + "IPv6: Loaded, but administratively disabled, " + "reboot required to enable\n"); + goto out; + } + err = proto_register(&tcpv6_prot, 1); if (err) goto out; @@ -1012,10 +1027,6 @@ static int __init inet6_init(void) goto out_unregister_udplite_proto; - /* Register the socket-side information for inet6_create. */ - for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) - INIT_LIST_HEAD(r); - /* We MUST register RAW sockets before we create the ICMP6, * IGMP6, or NDISC control sockets. */ -- cgit v1.1 From fb13d9f9e450bceafd88ac8a98f7a98e8096a5fe Mon Sep 17 00:00:00 2001 From: Brian Haley Date: Wed, 4 Mar 2009 03:20:26 -0800 Subject: SCTP: change sctp_ctl_sock_init() to try IPv4 if IPv6 fails Change sctp_ctl_sock_init() to try IPv4 if IPv6 socket registration fails. Required if the IPv6 module is loaded with "disable=1", else SCTP will fail to load. Signed-off-by: Brian Haley Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/sctp/protocol.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) (limited to 'net') diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c index 4e66384..c4986d0 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -717,15 +717,20 @@ static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev, static int sctp_ctl_sock_init(void) { int err; - sa_family_t family; + sa_family_t family = PF_INET; if (sctp_get_pf_specific(PF_INET6)) family = PF_INET6; - else - family = PF_INET; err = inet_ctl_sock_create(&sctp_ctl_sock, family, SOCK_SEQPACKET, IPPROTO_SCTP, &init_net); + + /* If IPv6 socket could not be created, try the IPv4 socket */ + if (err < 0 && family == PF_INET6) + err = inet_ctl_sock_create(&sctp_ctl_sock, AF_INET, + SOCK_SEQPACKET, IPPROTO_SCTP, + &init_net); + if (err < 0) { printk(KERN_ERR "SCTP: Failed to create the SCTP control socket.\n"); -- cgit v1.1 From a883bf564ea555447a76682bb2d8d4bc92e23e0e Mon Sep 17 00:00:00 2001 From: Jarek Poplawski Date: Wed, 4 Mar 2009 17:38:10 -0800 Subject: pkt_sched: act_police: Fix a rate estimator test. A commit c1b56878fb68e9c14070939ea4537ad4db79ffae "tc: policing requires a rate estimator" introduced a test which invalidates previously working configs, based on examples from iproute2: doc/actions/actions-general. This is too rigorous: a rate estimator is needed only when police's "avrate" option is used. Reported-by: Joao Correia Diagnosed-by: John Dykstra Signed-off-by: Jarek Poplawski Signed-off-by: David S. Miller --- net/sched/act_police.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) (limited to 'net') diff --git a/net/sched/act_police.c b/net/sched/act_police.c index 5c72a11..f8f047b6 100644 --- a/net/sched/act_police.c +++ b/net/sched/act_police.c @@ -183,13 +183,6 @@ override: if (R_tab == NULL) goto failure; - if (!est && (ret == ACT_P_CREATED || - !gen_estimator_active(&police->tcf_bstats, - &police->tcf_rate_est))) { - err = -EINVAL; - goto failure; - } - if (parm->peakrate.rate) { P_tab = qdisc_get_rtab(&parm->peakrate, tb[TCA_POLICE_PEAKRATE]); @@ -205,6 +198,12 @@ override: &police->tcf_lock, est); if (err) goto failure_unlock; + } else if (tb[TCA_POLICE_AVRATE] && + (ret == ACT_P_CREATED || + !gen_estimator_active(&police->tcf_bstats, + &police->tcf_rate_est))) { + err = -EINVAL; + goto failure_unlock; } /* No failure allowed after this point */ -- cgit v1.1 From 54acd0efab072cb70e87206329d561b297f93bbb Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 4 Mar 2009 23:01:02 -0800 Subject: net: Fix missing dev->neigh_setup in register_netdevice(). Signed-off-by: David S. Miller --- net/core/dev.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net') diff --git a/net/core/dev.c b/net/core/dev.c index 9e4afe6..2dd484e 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -4339,6 +4339,7 @@ int register_netdevice(struct net_device *dev) dev->do_ioctl = ops->ndo_do_ioctl; dev->set_config = ops->ndo_set_config; dev->change_mtu = ops->ndo_change_mtu; + dev->neigh_setup = ops->ndo_neigh_setup; dev->tx_timeout = ops->ndo_tx_timeout; dev->get_stats = ops->ndo_get_stats; dev->vlan_rx_register = ops->ndo_vlan_rx_register; -- cgit v1.1 From 9d40bbda599def1e1d155d7f7dca14fe8744bd2b Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Wed, 4 Mar 2009 23:46:25 -0800 Subject: vlan: Fix vlan-in-vlan crashes. As analyzed by Patrick McHardy, vlan needs to reset it's netdev_ops pointer in it's ->init() function but this leaves the compat method pointers stale. Add a netdev_resync_ops() and call it from the vlan code. Any other driver which changes ->netdev_ops after register_netdevice() will need to call this new function after doing so too. With help from Patrick McHardy. Tested-by: Patrick McHardy Signed-off-by: David S. Miller --- net/8021q/vlan_dev.c | 3 ++- net/core/dev.c | 56 +++++++++++++++++++++++++++++++--------------------- 2 files changed, 36 insertions(+), 23 deletions(-) (limited to 'net') diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c index 4a19acd..1b34135 100644 --- a/net/8021q/vlan_dev.c +++ b/net/8021q/vlan_dev.c @@ -553,7 +553,7 @@ static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) int err = 0; if (netif_device_present(real_dev) && ops->ndo_neigh_setup) - err = ops->ndo_neigh_setup(dev, pa); + err = ops->ndo_neigh_setup(real_dev, pa); return err; } @@ -639,6 +639,7 @@ static int vlan_dev_init(struct net_device *dev) dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; dev->netdev_ops = &vlan_netdev_ops; } + netdev_resync_ops(dev); if (is_vlan_dev(real_dev)) subclass = 1; diff --git a/net/core/dev.c b/net/core/dev.c index 2dd484e..f112970 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -4282,6 +4282,39 @@ unsigned long netdev_fix_features(unsigned long features, const char *name) } EXPORT_SYMBOL(netdev_fix_features); +/* Some devices need to (re-)set their netdev_ops inside + * ->init() or similar. If that happens, we have to setup + * the compat pointers again. + */ +void netdev_resync_ops(struct net_device *dev) +{ +#ifdef CONFIG_COMPAT_NET_DEV_OPS + const struct net_device_ops *ops = dev->netdev_ops; + + dev->init = ops->ndo_init; + dev->uninit = ops->ndo_uninit; + dev->open = ops->ndo_open; + dev->change_rx_flags = ops->ndo_change_rx_flags; + dev->set_rx_mode = ops->ndo_set_rx_mode; + dev->set_multicast_list = ops->ndo_set_multicast_list; + dev->set_mac_address = ops->ndo_set_mac_address; + dev->validate_addr = ops->ndo_validate_addr; + dev->do_ioctl = ops->ndo_do_ioctl; + dev->set_config = ops->ndo_set_config; + dev->change_mtu = ops->ndo_change_mtu; + dev->neigh_setup = ops->ndo_neigh_setup; + dev->tx_timeout = ops->ndo_tx_timeout; + dev->get_stats = ops->ndo_get_stats; + dev->vlan_rx_register = ops->ndo_vlan_rx_register; + dev->vlan_rx_add_vid = ops->ndo_vlan_rx_add_vid; + dev->vlan_rx_kill_vid = ops->ndo_vlan_rx_kill_vid; +#ifdef CONFIG_NET_POLL_CONTROLLER + dev->poll_controller = ops->ndo_poll_controller; +#endif +#endif +} +EXPORT_SYMBOL(netdev_resync_ops); + /** * register_netdevice - register a network device * @dev: device to register @@ -4326,28 +4359,7 @@ int register_netdevice(struct net_device *dev) * This is temporary until all network devices are converted. */ if (dev->netdev_ops) { - const struct net_device_ops *ops = dev->netdev_ops; - - dev->init = ops->ndo_init; - dev->uninit = ops->ndo_uninit; - dev->open = ops->ndo_open; - dev->change_rx_flags = ops->ndo_change_rx_flags; - dev->set_rx_mode = ops->ndo_set_rx_mode; - dev->set_multicast_list = ops->ndo_set_multicast_list; - dev->set_mac_address = ops->ndo_set_mac_address; - dev->validate_addr = ops->ndo_validate_addr; - dev->do_ioctl = ops->ndo_do_ioctl; - dev->set_config = ops->ndo_set_config; - dev->change_mtu = ops->ndo_change_mtu; - dev->neigh_setup = ops->ndo_neigh_setup; - dev->tx_timeout = ops->ndo_tx_timeout; - dev->get_stats = ops->ndo_get_stats; - dev->vlan_rx_register = ops->ndo_vlan_rx_register; - dev->vlan_rx_add_vid = ops->ndo_vlan_rx_add_vid; - dev->vlan_rx_kill_vid = ops->ndo_vlan_rx_kill_vid; -#ifdef CONFIG_NET_POLL_CONTROLLER - dev->poll_controller = ops->ndo_poll_controller; -#endif + netdev_resync_ops(dev); } else { char drivername[64]; pr_info("%s (%s): not using net_device_ops yet\n", -- cgit v1.1 From bd05f28e1a15ae62994fe309a524695fe26dd834 Mon Sep 17 00:00:00 2001 From: Roel Kluin Date: Tue, 3 Mar 2009 22:55:21 +0100 Subject: cfg80211: test before subtraction on unsigned freq_diff is unsigned, so test before subtraction Signed-off-by: Roel Kluin Signed-off-by: John W. Linville --- net/wireless/reg.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net') diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 85c9034..bd0a16c 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -380,7 +380,8 @@ static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; - if (freq_diff <= 0 || freq_range->max_bandwidth_khz > freq_diff) + if (freq_range->end_freq_khz <= freq_range->start_freq_khz || + freq_range->max_bandwidth_khz > freq_diff) return false; return true; -- cgit v1.1 From eb9b55ab4d73280597fd183b367d50452f4d7846 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 10 Mar 2009 20:33:16 -0400 Subject: SUNRPC: Tighten up the task locking rules in __rpc_execute() We should probably not be testing any flags after we've cleared the RPC_TASK_RUNNING flag, since rpc_make_runnable() is then free to assign the rpc_task to another workqueue, which may then destroy it. We can fix any races with rpc_make_runnable() by ensuring that we only clear the RPC_TASK_RUNNING flag while holding the rpc_wait_queue->lock that the task is supposed to be sleeping on (and then checking whether or not the task really is sleeping). Signed-off-by: Trond Myklebust --- net/sunrpc/sched.c | 33 ++++++++++++++++++++------------- 1 file changed, 20 insertions(+), 13 deletions(-) (limited to 'net') diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c index 385f427..ff50a05 100644 --- a/net/sunrpc/sched.c +++ b/net/sunrpc/sched.c @@ -293,11 +293,6 @@ static void rpc_make_runnable(struct rpc_task *task) rpc_clear_queued(task); if (rpc_test_and_set_running(task)) return; - /* We might have raced */ - if (RPC_IS_QUEUED(task)) { - rpc_clear_running(task); - return; - } if (RPC_IS_ASYNC(task)) { int status; @@ -607,7 +602,9 @@ void rpc_release_calldata(const struct rpc_call_ops *ops, void *calldata) */ static void __rpc_execute(struct rpc_task *task) { - int status = 0; + struct rpc_wait_queue *queue; + int task_is_async = RPC_IS_ASYNC(task); + int status = 0; dprintk("RPC: %5u __rpc_execute flags=0x%x\n", task->tk_pid, task->tk_flags); @@ -647,15 +644,25 @@ static void __rpc_execute(struct rpc_task *task) */ if (!RPC_IS_QUEUED(task)) continue; - rpc_clear_running(task); - if (RPC_IS_ASYNC(task)) { - /* Careful! we may have raced... */ - if (RPC_IS_QUEUED(task)) - return; - if (rpc_test_and_set_running(task)) - return; + /* + * The queue->lock protects against races with + * rpc_make_runnable(). + * + * Note that once we clear RPC_TASK_RUNNING on an asynchronous + * rpc_task, rpc_make_runnable() can assign it to a + * different workqueue. We therefore cannot assume that the + * rpc_task pointer may still be dereferenced. + */ + queue = task->tk_waitqueue; + spin_lock_bh(&queue->lock); + if (!RPC_IS_QUEUED(task)) { + spin_unlock_bh(&queue->lock); continue; } + rpc_clear_running(task); + spin_unlock_bh(&queue->lock); + if (task_is_async) + return; /* sync task: sleep here */ dprintk("RPC: %5u sync task going to sleep\n", task->tk_pid); -- cgit v1.1 From fba91afbec2c004e2c8733ae9e0ca6998e962c64 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Wed, 11 Mar 2009 14:06:41 -0400 Subject: SUNRPC: Fix an Oops due to socket not set up yet... We can Oops in both xs_udp_send_request() and xs_tcp_send_request() if the call to xs_sendpages() returns an error due to the socket not yet being set up. Deal with that situation by returning a new error: ENOTSOCK, so that we know to avoid dereferencing transport->sock. Signed-off-by: Trond Myklebust --- net/sunrpc/xprtsock.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'net') diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 5cbb404..a71fefd 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -467,7 +467,7 @@ static int xs_sendpages(struct socket *sock, struct sockaddr *addr, int addrlen, int err, sent = 0; if (unlikely(!sock)) - return -ENOTCONN; + return -ENOTSOCK; clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags); if (base != 0) { @@ -594,6 +594,10 @@ static int xs_udp_send_request(struct rpc_task *task) } switch (status) { + case -ENOTSOCK: + status = -ENOTCONN; + /* Should we call xs_close() here? */ + break; case -EAGAIN: xs_nospace(task); break; @@ -693,6 +697,10 @@ static int xs_tcp_send_request(struct rpc_task *task) } switch (status) { + case -ENOTSOCK: + status = -ENOTCONN; + /* Should we call xs_close() here? */ + break; case -EAGAIN: xs_nospace(task); break; -- cgit v1.1 From 01d37c428ae080563c0a3bb8bdfa88c65a6891d3 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Wed, 11 Mar 2009 14:09:39 -0400 Subject: SUNRPC: xprt_connect() don't abort the task if the transport isn't bound If the transport isn't bound, then we should just return ENOTCONN, letting call_connect_status() and/or call_status() deal with retrying. Currently, we appear to abort all pending tasks with an EIO error. Signed-off-by: Trond Myklebust --- net/sunrpc/xprt.c | 2 +- net/sunrpc/xprtsock.c | 13 +++++++++---- 2 files changed, 10 insertions(+), 5 deletions(-) (limited to 'net') diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index 29e401b..62098d1 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -663,7 +663,7 @@ void xprt_connect(struct rpc_task *task) xprt, (xprt_connected(xprt) ? "is" : "is not")); if (!xprt_bound(xprt)) { - task->tk_status = -EIO; + task->tk_status = -EAGAIN; return; } if (!xprt_lock_write(xprt, task)) diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index a71fefd..29c71e6 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -577,6 +577,8 @@ static int xs_udp_send_request(struct rpc_task *task) req->rq_svec->iov_base, req->rq_svec->iov_len); + if (!xprt_bound(xprt)) + return -ENOTCONN; status = xs_sendpages(transport->sock, xs_addr(xprt), xprt->addrlen, xdr, @@ -1531,7 +1533,7 @@ static void xs_udp_connect_worker4(struct work_struct *work) struct socket *sock = transport->sock; int err, status = -EIO; - if (xprt->shutdown || !xprt_bound(xprt)) + if (xprt->shutdown) goto out; /* Start by resetting any existing state */ @@ -1572,7 +1574,7 @@ static void xs_udp_connect_worker6(struct work_struct *work) struct socket *sock = transport->sock; int err, status = -EIO; - if (xprt->shutdown || !xprt_bound(xprt)) + if (xprt->shutdown) goto out; /* Start by resetting any existing state */ @@ -1656,6 +1658,9 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) write_unlock_bh(&sk->sk_callback_lock); } + if (!xprt_bound(xprt)) + return -ENOTCONN; + /* Tell the socket layer to start connecting... */ xprt->stat.connect_count++; xprt->stat.connect_start = jiffies; @@ -1676,7 +1681,7 @@ static void xs_tcp_connect_worker4(struct work_struct *work) struct socket *sock = transport->sock; int err, status = -EIO; - if (xprt->shutdown || !xprt_bound(xprt)) + if (xprt->shutdown) goto out; if (!sock) { @@ -1736,7 +1741,7 @@ static void xs_tcp_connect_worker6(struct work_struct *work) struct socket *sock = transport->sock; int err, status = -EIO; - if (xprt->shutdown || !xprt_bound(xprt)) + if (xprt->shutdown) goto out; if (!sock) { -- cgit v1.1