From 66266b3ab4871958ed6a1e43f502cadaf3becfc8 Mon Sep 17 00:00:00 2001 From: "John W. Linville" Date: Thu, 15 Mar 2012 13:25:41 -0400 Subject: cfg80211: allow CFG80211_SIGNAL_TYPE_UNSPEC in station_info The station_info struct had demanded dBm signal values, but the cfg80211 wireless extensions implementation was also accepting "unspecified" (i.e. RSSI) unit values while the nl80211 code was completely unaware of them. Resolve this by formally allowing the "unspecified" units while making nl80211 ignore them. Signed-off-by: John W. Linville Reviewed-by: Johannes Berg --- net/wireless/nl80211.c | 29 +++++++++++++++++++---------- 1 file changed, 19 insertions(+), 10 deletions(-) (limited to 'net') diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 4c1eb9472ddb..e49da2797022 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -2386,7 +2386,9 @@ nla_put_failure: } static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq, - int flags, struct net_device *dev, + int flags, + struct cfg80211_registered_device *rdev, + struct net_device *dev, const u8 *mac_addr, struct station_info *sinfo) { void *hdr; @@ -2425,12 +2427,18 @@ static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq, if (sinfo->filled & STATION_INFO_PLINK_STATE) NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE, sinfo->plink_state); - if (sinfo->filled & STATION_INFO_SIGNAL) - NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL, - sinfo->signal); - if (sinfo->filled & STATION_INFO_SIGNAL_AVG) - NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG, - sinfo->signal_avg); + switch (rdev->wiphy.signal_type) { + case CFG80211_SIGNAL_TYPE_MBM: + if (sinfo->filled & STATION_INFO_SIGNAL) + NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL, + sinfo->signal); + if (sinfo->filled & STATION_INFO_SIGNAL_AVG) + NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG, + sinfo->signal_avg); + break; + default: + break; + } if (sinfo->filled & STATION_INFO_TX_BITRATE) { if (!nl80211_put_sta_rate(msg, &sinfo->txrate, NL80211_STA_INFO_TX_BITRATE)) @@ -2523,7 +2531,7 @@ static int nl80211_dump_station(struct sk_buff *skb, if (nl80211_send_station(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, NLM_F_MULTI, - netdev, mac_addr, + dev, netdev, mac_addr, &sinfo) < 0) goto out; @@ -2568,7 +2576,7 @@ static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info) return -ENOMEM; if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0, - dev, mac_addr, &sinfo) < 0) { + rdev, dev, mac_addr, &sinfo) < 0) { nlmsg_free(msg); return -ENOBUFS; } @@ -7596,7 +7604,8 @@ void nl80211_send_sta_event(struct cfg80211_registered_device *rdev, if (!msg) return; - if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) { + if (nl80211_send_station(msg, 0, 0, 0, + rdev, dev, mac_addr, sinfo) < 0) { nlmsg_free(msg); return; } -- cgit v1.2.3 From b603c03e9534b9bec19ebf8c42bf217fd875ee65 Mon Sep 17 00:00:00 2001 From: Eliad Peller Date: Sun, 18 Mar 2012 14:08:50 +0200 Subject: mac80211: remove outdated comment The on-oper-channel optimization was reverted, so remove the outdated comment as well. Signed-off-by: Eliad Peller Signed-off-by: John W. Linville --- net/mac80211/main.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'net') diff --git a/net/mac80211/main.c b/net/mac80211/main.c index b581a24fa15c..16336480c631 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -102,9 +102,6 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) might_sleep(); - /* If this off-channel logic ever changes, ieee80211_on_oper_channel - * may need to change as well. - */ offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; if (local->scan_channel) { chan = local->scan_channel; -- cgit v1.2.3 From d72308bff5c2fa207949a5925b020bce74495e33 Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Mon, 19 Mar 2012 16:00:26 +0100 Subject: mac80211: fix possible tid_rx->reorder_timer use after free Is possible that we will arm the tid_rx->reorder_timer after del_timer_sync() in ___ieee80211_stop_rx_ba_session(). We need to stop timer after RCU grace period finish, so move it to ieee80211_free_tid_rx(). Timer will not be armed again, as rcu_dereference(sta->ampdu_mlme.tid_rx[tid]) will return NULL. Debug object detected problem with the following warning: ODEBUG: free active (active state 0) object type: timer_list hint: sta_rx_agg_reorder_timer_expired+0x0/0xf0 [mac80211] Bug report (with all warning messages): https://bugzilla.redhat.com/show_bug.cgi?id=804007 Reported-by: "jan p. springer" Cc: stable@vger.kernel.org Signed-off-by: Stanislaw Gruszka Signed-off-by: John W. Linville --- net/mac80211/agg-rx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net') diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c index 1068f668ac4e..64d3ce5ea1a0 100644 --- a/net/mac80211/agg-rx.c +++ b/net/mac80211/agg-rx.c @@ -49,6 +49,8 @@ static void ieee80211_free_tid_rx(struct rcu_head *h) container_of(h, struct tid_ampdu_rx, rcu_head); int i; + del_timer_sync(&tid_rx->reorder_timer); + for (i = 0; i < tid_rx->buf_size; i++) dev_kfree_skb(tid_rx->reorder_buf[i]); kfree(tid_rx->reorder_buf); @@ -91,7 +93,6 @@ void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid, tid, WLAN_BACK_RECIPIENT, reason); del_timer_sync(&tid_rx->session_timer); - del_timer_sync(&tid_rx->reorder_timer); call_rcu(&tid_rx->rcu_head, ieee80211_free_tid_rx); } -- cgit v1.2.3 From 4e7b2f1454382b220f792a7fbcbebd0985187161 Mon Sep 17 00:00:00 2001 From: Benjamin LaHaise Date: Tue, 27 Mar 2012 15:55:32 +0000 Subject: net/ipv4: fix IPv4 multicast over network namespaces When using multicast over a local bridge feeding a number of LXC guests using veth, the LXC guests are unable to get a response from other guests when pinging 224.0.0.1. Multicast packets did not appear to be getting delivered to the network namespaces of the guest hosts, and further inspection showed that the incoming route was pointing to the loopback device of the host, not the guest. This lead to the wrong network namespace being picked up by sockets (like ICMP). Fix this by using the correct network namespace when creating the inbound route entry. Signed-off-by: Benjamin LaHaise Signed-off-by: David S. Miller --- net/ipv4/route.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net') diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 12ccf880eb88..3b110a46362c 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -2042,7 +2042,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr, if (err < 0) goto e_err; } - rth = rt_dst_alloc(init_net.loopback_dev, + rth = rt_dst_alloc(dev_net(dev)->loopback_dev, IN_DEV_CONF_GET(in_dev, NOPOLICY), false); if (!rth) goto e_nobufs; -- cgit v1.2.3 From 3b9785c6b0ff37ac4ef5085b38756283da84dceb Mon Sep 17 00:00:00 2001 From: Benjamin LaHaise Date: Tue, 27 Mar 2012 15:55:44 +0000 Subject: net/core: dev_forward_skb() should clear skb_iif While investigating another bug, I found that the code on the incoming path in __netif_receive_skb will only set skb->skb_iif if it is already 0. When dev_forward_skb() is used in the case of interfaces like veth, skb_iif may already have been set. Making dev_forward_skb() cause the packet to look like a newly received packet would seem to the the correct behaviour here, as otherwise the wrong incoming interface can be reported for such a packet. Signed-off-by: Benjamin LaHaise 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 452db7090d18..723a4065a00e 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1597,6 +1597,7 @@ int dev_forward_skb(struct net_device *dev, struct sk_buff *skb) kfree_skb(skb); return NET_RX_DROP; } + skb->skb_iif = 0; skb_set_dev(skb, dev); skb->tstamp.tv64 = 0; skb->pkt_type = PACKET_HOST; -- cgit v1.2.3 From de312db345f9770b64ff39ef5a7f86f6358e93cc Mon Sep 17 00:00:00 2001 From: Rajkumar Manoharan Date: Tue, 27 Mar 2012 11:01:06 +0530 Subject: mac80211: fix oper channel timestamp updation Whenever the station informs the AP that it is about to leave the operating channel, the timestamp should be recorded. It is handled in scan resume but not in scan start. Fix that. Signed-off-by: Rajkumar Manoharan Signed-off-by: John W. Linville --- net/mac80211/scan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net') diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index 33cd16901378..c70e17677135 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -370,7 +370,7 @@ static int ieee80211_start_sw_scan(struct ieee80211_local *local) */ drv_sw_scan_start(local); - local->leave_oper_channel_time = 0; + local->leave_oper_channel_time = jiffies; local->next_scan_state = SCAN_DECISION; local->scan_channel_idx = 0; -- cgit v1.2.3 From 67378563df2e168d32a4054616f244a91aec462d Mon Sep 17 00:00:00 2001 From: David Ward Date: Tue, 27 Mar 2012 09:01:52 +0000 Subject: net/garp: avoid infinite loop if attribute already exists An infinite loop occurred if garp_attr_create was called with the values of an existing attribute. This might happen if a previous leave request for the attribute has not yet been followed by a PDU transmission (or, if the application previously issued a join request for the attribute and is now issuing another one, without having issued a leave request). If garp_attr_create finds an existing attribute having the same values, return the address to it. Its state will then get updated (i.e., if it was in a leaving state, it will move into a non-leaving state and not get deleted during the next PDU transmission). To accomplish this fix, collapse garp_attr_insert into garp_attr_create (which is its only caller). Thanks to Jorge Boncompte [DTI2] for contributing to this fix. Signed-off-by: David Ward Acked-by: Jorge Boncompte [DTI2] Signed-off-by: David S. Miller --- net/802/garp.c | 22 ++++++++++------------ 1 file changed, 10 insertions(+), 12 deletions(-) (limited to 'net') diff --git a/net/802/garp.c b/net/802/garp.c index 8e21b6db3981..a5c224830439 100644 --- a/net/802/garp.c +++ b/net/802/garp.c @@ -167,7 +167,8 @@ static struct garp_attr *garp_attr_lookup(const struct garp_applicant *app, return NULL; } -static void garp_attr_insert(struct garp_applicant *app, struct garp_attr *new) +static struct garp_attr *garp_attr_create(struct garp_applicant *app, + const void *data, u8 len, u8 type) { struct rb_node *parent = NULL, **p = &app->gid.rb_node; struct garp_attr *attr; @@ -176,21 +177,16 @@ static void garp_attr_insert(struct garp_applicant *app, struct garp_attr *new) while (*p) { parent = *p; attr = rb_entry(parent, struct garp_attr, node); - d = garp_attr_cmp(attr, new->data, new->dlen, new->type); + d = garp_attr_cmp(attr, data, len, type); if (d < 0) p = &parent->rb_left; else if (d > 0) p = &parent->rb_right; + else { + /* The attribute already exists; re-use it. */ + return attr; + } } - rb_link_node(&new->node, parent, p); - rb_insert_color(&new->node, &app->gid); -} - -static struct garp_attr *garp_attr_create(struct garp_applicant *app, - const void *data, u8 len, u8 type) -{ - struct garp_attr *attr; - attr = kmalloc(sizeof(*attr) + len, GFP_ATOMIC); if (!attr) return attr; @@ -198,7 +194,9 @@ static struct garp_attr *garp_attr_create(struct garp_applicant *app, attr->type = type; attr->dlen = len; memcpy(attr->data, data, len); - garp_attr_insert(app, attr); + + rb_link_node(&attr->node, parent, p); + rb_insert_color(&attr->node, &app->gid); return attr; } -- cgit v1.2.3 From 81213b5e8ae68e204aa7a3f83c4f9100405dbff9 Mon Sep 17 00:00:00 2001 From: "danborkmann@iogearbox.net" Date: Tue, 27 Mar 2012 22:47:43 +0000 Subject: rose_dev: fix memcpy-bug in rose_set_mac_address If both addresses equal, nothing needs to be done. If the device is down, then we simply copy the new address to dev->dev_addr. If the device is up, then we add another loopback device with the new address, and if that does not fail, we remove the loopback device with the old address. And only then, we update the dev->dev_addr. Signed-off-by: Daniel Borkmann Signed-off-by: David S. Miller --- net/rose/rose_dev.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net') diff --git a/net/rose/rose_dev.c b/net/rose/rose_dev.c index 178ff4f73c85..2679507ad333 100644 --- a/net/rose/rose_dev.c +++ b/net/rose/rose_dev.c @@ -96,11 +96,11 @@ static int rose_set_mac_address(struct net_device *dev, void *addr) struct sockaddr *sa = addr; int err; - if (!memcpy(dev->dev_addr, sa->sa_data, dev->addr_len)) + if (!memcmp(dev->dev_addr, sa->sa_data, dev->addr_len)) return 0; if (dev->flags & IFF_UP) { - err = rose_add_loopback_node((rose_address *)dev->dev_addr); + err = rose_add_loopback_node((rose_address *)sa->sa_data); if (err) return err; -- cgit v1.2.3 From 6523cf9a460c488c681b7e4ecef2395491de1d4e Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Wed, 28 Mar 2012 12:10:57 +0000 Subject: net/netfilter/nfnetlink_acct.c: use linux/atomic.h There's no known problem here, but this is one of only two non-arch files in the kernel which use asm/atomic.h instead of linux/atomic.h. Acked-by: Pablo Neira Ayuso Cc: Patrick McHardy Cc: "David S. Miller" Signed-off-by: Andrew Morton Signed-off-by: David S. Miller --- net/netfilter/nfnetlink_acct.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net') diff --git a/net/netfilter/nfnetlink_acct.c b/net/netfilter/nfnetlink_acct.c index 3eb348bfc4fb..d98c868c148b 100644 --- a/net/netfilter/nfnetlink_acct.c +++ b/net/netfilter/nfnetlink_acct.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -17,7 +18,6 @@ #include #include #include -#include #include #include -- cgit v1.2.3 From 72331bc0cd072c3f4b670cd1256e47681fc53b80 Mon Sep 17 00:00:00 2001 From: Shmulik Ladkani Date: Sun, 1 Apr 2012 04:03:45 +0000 Subject: ipv6: Fix RTM_GETROUTE's interpretation of RTA_IIF to be consistent with ipv4 In IPv4, if an RTA_IIF attribute is specified within an RTM_GETROUTE message, then a route is searched as if a packet was received on the specified 'iif' interface. However in IPv6, RTA_IIF is not interpreted in the same way: 'inet6_rtm_getroute()' always calls 'ip6_route_output()', regardless the RTA_IIF attribute. As a result, in IPv6 there's no way to use RTM_GETROUTE in order to look for a route as if a packet was received on a specific interface. Fix 'inet6_rtm_getroute()' so that RTA_IIF is interpreted as "lookup a route as if a packet was received on the specified interface", similar to IPv4's 'inet_rtm_getroute()' interpretation. Reported-by: Ami Koren Signed-off-by: Shmulik Ladkani Signed-off-by: David S. Miller --- net/ipv6/route.c | 34 +++++++++++++++++++++++++++------- 1 file changed, 27 insertions(+), 7 deletions(-) (limited to 'net') diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 496b62712fe8..3992e26a6039 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -881,6 +881,16 @@ static struct rt6_info *ip6_pol_route_input(struct net *net, struct fib6_table * return ip6_pol_route(net, table, fl6->flowi6_iif, fl6, flags); } +static struct dst_entry *ip6_route_input_lookup(struct net *net, + struct net_device *dev, + struct flowi6 *fl6, int flags) +{ + if (rt6_need_strict(&fl6->daddr) && dev->type != ARPHRD_PIMREG) + flags |= RT6_LOOKUP_F_IFACE; + + return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_input); +} + void ip6_route_input(struct sk_buff *skb) { const struct ipv6hdr *iph = ipv6_hdr(skb); @@ -895,10 +905,7 @@ void ip6_route_input(struct sk_buff *skb) .flowi6_proto = iph->nexthdr, }; - if (rt6_need_strict(&iph->daddr) && skb->dev->type != ARPHRD_PIMREG) - flags |= RT6_LOOKUP_F_IFACE; - - skb_dst_set(skb, fib6_rule_lookup(net, &fl6, flags, ip6_pol_route_input)); + skb_dst_set(skb, ip6_route_input_lookup(net, skb->dev, &fl6, flags)); } static struct rt6_info *ip6_pol_route_output(struct net *net, struct fib6_table *table, @@ -2537,7 +2544,7 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void struct sk_buff *skb; struct rtmsg *rtm; struct flowi6 fl6; - int err, iif = 0; + int err, iif = 0, oif = 0; err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); if (err < 0) @@ -2564,15 +2571,29 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void iif = nla_get_u32(tb[RTA_IIF]); if (tb[RTA_OIF]) - fl6.flowi6_oif = nla_get_u32(tb[RTA_OIF]); + oif = nla_get_u32(tb[RTA_OIF]); if (iif) { struct net_device *dev; + int flags = 0; + dev = __dev_get_by_index(net, iif); if (!dev) { err = -ENODEV; goto errout; } + + fl6.flowi6_iif = iif; + + if (!ipv6_addr_any(&fl6.saddr)) + flags |= RT6_LOOKUP_F_HAS_SADDR; + + rt = (struct rt6_info *)ip6_route_input_lookup(net, dev, &fl6, + flags); + } else { + fl6.flowi6_oif = oif; + + rt = (struct rt6_info *)ip6_route_output(net, NULL, &fl6); } skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); @@ -2587,7 +2608,6 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void skb_reset_mac_header(skb); skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr)); - rt = (struct rt6_info*) ip6_route_output(net, NULL, &fl6); skb_dst_set(skb, &rt->dst); err = rt6_fill_node(net, skb, rt, &fl6.daddr, &fl6.saddr, iif, -- cgit v1.2.3