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2011-02-19tcp: fix inet_twsk_deschedule()Eric Dumazet1-0/+2
Eric W. Biederman reported a lockdep splat in inet_twsk_deschedule() This is caused by inet_twsk_purge(), run from process context, and commit 575f4cd5a5b6394577 (net: Use rcu lookups in inet_twsk_purge.) removed the BH disabling that was necessary. Add the BH disabling but fine grained, right before calling inet_twsk_deschedule(), instead of whole function. With help from Linus Torvalds and Eric W. Biederman Reported-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Daniel Lezcano <daniel.lezcano@free.fr> CC: Pavel Emelyanov <xemul@openvz.org> CC: Arnaldo Carvalho de Melo <acme@redhat.com> CC: stable <stable@kernel.org> (# 2.6.33+) Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-18net: deinit automatic LIST_HEADEric Dumazet1-0/+2
commit 9b5e383c11b08784 (net: Introduce unregister_netdevice_many()) left an active LIST_HEAD() in rollback_registered(), with possible memory corruption. Even if device is freed without touching its unreg_list (and therefore touching the previous memory location holding LISTE_HEAD(single), better close the bug for good, since its really subtle. (Same fix for default_device_exit_batch() for completeness) Reported-by: Michal Hocko <mhocko@suse.cz> Tested-by: Michal Hocko <mhocko@suse.cz> Reported-by: Eric W. Biderman <ebiderman@xmission.com> Tested-by: Eric W. Biderman <ebiderman@xmission.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Ingo Molnar <mingo@elte.hu> CC: Octavian Purdila <opurdila@ixiacom.com> CC: stable <stable@kernel.org> [.33+] Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-18net: dont leave active on stack LIST_HEADLinus Torvalds1-2/+5
Eric W. Biderman and Michal Hocko reported various memory corruptions that we suspected to be related to a LIST head located on stack, that was manipulated after thread left function frame (and eventually exited, so its stack was freed and reused). Eric Dumazet suggested the problem was probably coming from commit 443457242beb (net: factorize sync-rcu call in unregister_netdevice_many) This patch fixes __dev_close() and dev_close() to properly deinit their respective LIST_HEAD(single) before exiting. References: https://lkml.org/lkml/2011/2/16/304 References: https://lkml.org/lkml/2011/2/14/223 Reported-by: Michal Hocko <mhocko@suse.cz> Tested-by: Michal Hocko <mhocko@suse.cz> Reported-by: Eric W. Biderman <ebiderman@xmission.com> Tested-by: Eric W. Biderman <ebiderman@xmission.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Ingo Molnar <mingo@elte.hu> CC: Octavian Purdila <opurdila@ixiacom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-18net: provide default_advmss() methods to blackhole dst_opsEric Dumazet2-0/+2
Commit 0dbaee3b37e118a (net: Abstract default ADVMSS behind an accessor.) introduced a possible crash in tcp_connect_init(), when dst->default_advmss() is called from dst_metric_advmss() Reported-by: George Spelvin <linux@horizon.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-17netfilter: ip6t_LOG: fix a flaw in printing the MACJoerg Marx1-1/+1
The flaw was in skipping the second byte in MAC header due to increasing the pointer AND indexed access starting at '1'. Signed-off-by: Joerg Marx <joerg.marx@secunet.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2011-02-17netfilter: tproxy: do not assign timewait sockets to skb->skFlorian Westphal3-19/+43
Assigning a socket in timewait state to skb->sk can trigger kernel oops, e.g. in nfnetlink_log, which does: if (skb->sk) { read_lock_bh(&skb->sk->sk_callback_lock); if (skb->sk->sk_socket && skb->sk->sk_socket->file) ... in the timewait case, accessing sk->sk_callback_lock and sk->sk_socket is invalid. Either all of these spots will need to add a test for sk->sk_state != TCP_TIME_WAIT, or xt_TPROXY must not assign a timewait socket to skb->sk. This does the latter. If a TW socket is found, assign the tproxy nfmark, but skip the skb->sk assignment, thus mimicking behaviour of a '-m socket .. -j MARK/ACCEPT' re-routing rule. The 'SYN to TW socket' case is left unchanged -- we try to redirect to the listener socket. Cc: Balazs Scheidler <bazsi@balabit.hu> Cc: KOVACS Krisztian <hidden@balabit.hu> Signed-off-by: Florian Westphal <fwestphal@astaro.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2011-02-14arp_notify: unconditionally send gratuitous ARP for NETDEV_NOTIFY_PEERS.Ian Campbell1-10/+20
NETDEV_NOTIFY_PEER is an explicit request by the driver to send a link notification while NETDEV_UP/NETDEV_CHANGEADDR generate link notifications as a sort of side effect. In the later cases the sysctl option is present because link notification events can have undesired effects e.g. if the link is flapping. I don't think this applies in the case of an explicit request from a driver. This patch makes NETDEV_NOTIFY_PEER unconditional, if preferred we could add a new sysctl for this case which defaults to on. This change causes Xen post-migration ARP notifications (which cause switches to relearn their MAC tables etc) to be sent by default. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-14netfilter: nf_iterate: fix incorrect RCU usagePatrick McHardy1-1/+2
As noticed by Eric, nf_iterate doesn't use RCU correctly by accessing the prev pointer of a RCU protected list element when a verdict of NF_REPEAT is issued. Fix by jumping backwards to the hook invocation directly instead of loading the previous list element before continuing the list iteration. Reported-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2011-02-13Don't potentially dereference NULL in net/dcb/dcbnl.c:dcbnl_getapp()Jesper Juhl1-0/+3
nla_nest_start() may return NULL. If it does then we'll blow up in nla_nest_end() when we dereference the pointer. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-13net: dcb: application priority is per net_deviceJohn Fastabend1-1/+5
The app_data priority may not be the same for all net devices. In order for stacks with application notifiers to identify the specific net device dcb_app_type should be passed in the ptr. This allows handlers to use dev_get_by_name() to pin priority to net devices. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-12bridge: Replace mp->mglist hlist with a boolHerbert Xu3-12/+9
As it turns out we never need to walk through the list of multicast groups subscribed by the bridge interface itself (the only time we'd want to do that is when we shut down the bridge, in which case we simply walk through all multicast groups), we don't really need to keep an hlist for mp->mglist. This means that we can replace it with just a single bit to indicate whether the bridge interface is subscribed to a group. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-11bridge: Fix timer typo that may render snooping less effectiveHerbert Xu1-2/+2
In a couple of spots where we are supposed to modify the port group timer (p->timer) we instead modify the bridge interface group timer (mp->timer). The effect of this is mostly harmless. However, it can cause port subscriptions to be longer than they should be, thus making snooping less effective. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-11bridge: Fix mglist corruption that leads to memory corruptionHerbert Xu1-1/+2
The list mp->mglist is used to indicate whether a multicast group is active on the bridge interface itself as opposed to one of the constituent interfaces in the bridge. Unfortunately the operation that adds the mp->mglist node to the list neglected to check whether it has already been added. This leads to list corruption in the form of nodes pointing to itself. Normally this would be quite obvious as it would cause an infinite loop when walking the list. However, as this list is never actually walked (which means that we don't really need it, I'll get rid of it in a subsequent patch), this instead is hidden until we perform a delete operation on the affected nodes. As the same node may now be pointed to by more than one node, the delete operations can then cause modification of freed memory. This was observed in practice to cause corruption in 512-byte slabs, most commonly leading to crashes in jbd2. Thanks to Josef Bacik for pointing me in the right direction. Reported-by: Ian Page Hands <ihands@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-11ip_gre: Add IPPROTO_GRE to flowi in ipgre_tunnel_xmitSteffen Klassert1-0/+1
Commit 5811662b15db018c740c57d037523683fd3e6123 ("net: use the macros defined for the members of flowi") accidentally removed the setting of IPPROTO_GRE from the struct flowi in ipgre_tunnel_xmit. This patch restores it. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Acked-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-10xfrm: avoid possible oopse in xfrm_alloc_dstHiroaki SHIMODA1-2/+5
Commit 80c802f3073e84 (xfrm: cache bundles instead of policies for outgoing flows) introduced possible oopse when dst_alloc returns NULL. Signed-off-by: Hiroaki SHIMODA <shimoda.hiroaki@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-09x25: Do not reference freed memory.David S. Miller1-1/+4
In x25_link_free(), we destroy 'nb' before dereferencing 'nb->dev'. Don't do this, because 'nb' might be freed by then. Reported-by: Randy Dunlap <randy.dunlap@oracle.com> Tested-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-09mac80211: add missing locking in ieee80211_reconfigEliad Peller1-0/+2
When suspending an associated system, and then resuming, the station vif is being reconfigured without taking the sdata->u.mgd.mtx lock, which results in the following warning: WARNING: at net/mac80211/mlme.c:101 ieee80211_ap_probereq_get+0x58/0xb8 [mac80211]() Modules linked in: wl12xx_sdio wl12xx firmware_class crc7 mac80211 cfg80211 [last unloaded: crc7] Backtrace: [<c005432c>] (dump_backtrace+0x0/0x118) from [<c0376e28>] (dump_stack+0x20/0x24) r7:00000000 r6:bf12d6ec r5:bf154aac r4:00000065 [<c0376e08>] (dump_stack+0x0/0x24) from [<c0079104>] (warn_slowpath_common+0x5c/0x74) [<c00790a8>] (warn_slowpath_common+0x0/0x74) from [<c0079148>] (warn_slowpath_null+0x2c/0x34) r9:000024ff r8:cd006460 r7:00000001 r6:00000000 r5:00000000 r4:cf1394a0 [<c007911c>] (warn_slowpath_null+0x0/0x34) from [<bf12d6ec>] (ieee80211_ap_probereq_get+0x58/0xb8 [mac80211]) [<bf12d694>] (ieee80211_ap_probereq_get+0x0/0xb8 [mac80211]) from [<bf19cd04>] (wl1271_cmd_build_ap_probe_req+0x30/0xf8 [wl12xx]) r4:cd007440 [<bf19ccd4>] (wl1271_cmd_build_ap_probe_req+0x0/0xf8 [wl12xx]) from [<bf1995f4>] (wl1271_op_bss_info_changed+0x4c4/0x808 [wl12xx]) r5:cd007440 r4:000003b4 [<bf199130>] (wl1271_op_bss_info_changed+0x0/0x808 [wl12xx]) from [<bf122168>] (ieee80211_bss_info_change_notify+0x1a4/0x1f8 [mac80211]) [<bf121fc4>] (ieee80211_bss_info_change_notify+0x0/0x1f8 [mac80211]) from [<bf141e80>] (ieee80211_reconfig+0x4d0/0x668 [mac80211]) r8:cf0eeea4 r7:cd00671c r6:00000000 r5:cd006460 r4:cf1394a0 [<bf1419b0>] (ieee80211_reconfig+0x0/0x668 [mac80211]) from [<bf137dd4>] (ieee80211_resume+0x60/0x70 [mac80211]) [<bf137d74>] (ieee80211_resume+0x0/0x70 [mac80211]) from [<bf0eb930>] (wiphy_resume+0x6c/0x7c [cfg80211]) r5:cd006248 r4:cd006110 [<bf0eb8c4>] (wiphy_resume+0x0/0x7c [cfg80211]) from [<c0241024>] (legacy_resume+0x38/0x70) r7:00000000 r6:00000000 r5:cd006248 r4:cd0062fc [<c0240fec>] (legacy_resume+0x0/0x70) from [<c0241478>] (device_resume+0x168/0x1a0) r8:c04ca8d8 r7:cd00627c r6:00000010 r5:cd006248 r4:cd0062fc [<c0241310>] (device_resume+0x0/0x1a0) from [<c0241600>] (dpm_resume_end+0xf8/0x3bc) r7:00000000 r6:00000005 r5:cd006248 r4:cd0062fc [<c0241508>] (dpm_resume_end+0x0/0x3bc) from [<c00b2a24>] (suspend_devices_and_enter+0x1b0/0x204) [<c00b2874>] (suspend_devices_and_enter+0x0/0x204) from [<c00b2b68>] (enter_state+0xf0/0x148) r7:c037e978 r6:00000003 r5:c043d807 r4:00000000 [<c00b2a78>] (enter_state+0x0/0x148) from [<c00b20a4>] (state_store+0xa4/0xcc) r7:c037e978 r6:00000003 r5:00000003 r4:c043d807 [<c00b2000>] (state_store+0x0/0xcc) from [<c01fc90c>] (kobj_attr_store+0x20/0x24) [<c01fc8ec>] (kobj_attr_store+0x0/0x24) from [<c0157120>] (sysfs_write_file+0x11c/0x150) [<c0157004>] (sysfs_write_file+0x0/0x150) from [<c0100f84>] (vfs_write+0xc0/0x14c) [<c0100ec4>] (vfs_write+0x0/0x14c) from [<c01010e4>] (sys_write+0x4c/0x78) r8:40126000 r7:00000004 r6:cf1a7c80 r5:00000000 r4:00000000 [<c0101098>] (sys_write+0x0/0x78) from [<c00500c0>] (ret_fast_syscall+0x0/0x30) r8:c00502c8 r7:00000004 r6:403525e8 r5:40126000 r4:00000004 Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-02-09netfilter: nf_conntrack: set conntrack templates again if we return NF_REPEATPablo Neira Ayuso1-2/+9
The TCP tracking code has a special case that allows to return NF_REPEAT if we receive a new SYN packet while in TIME_WAIT state. In this situation, the TCP tracking code destroys the existing conntrack to start a new clean session. [DESTROY] tcp 6 src= dst= sport=38925 dport=8000 src= dst= sport=8000 dport=38925 [ASSURED] [NEW] tcp 6 120 SYN_SENT src= dst= sport=38925 dport=8000 [UNREPLIED] src= dst= sport=8000 dport=38925 However, this is a problem for the iptables' CT target event filtering which will not work in this case since the conntrack template will not be there for the new session. To fix this, we reassign the conntrack template to the packet if we return NF_REPEAT. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net>
2011-02-08net: Fix lockdep regression caused by initializing netdev queues too early.David S. Miller1-11/+16
In commit aa9421041128abb4d269ee1dc502ff65fb3b7d69 ("net: init ingress queue") we moved the allocation and lock initialization of the queues into alloc_netdev_mq() since register_netdevice() is way too late. The problem is that dev->type is not setup until the setup() callback is invoked by alloc_netdev_mq(), and the dev->type is what determines the lockdep class to use for the locks in the queues. Fix this by doing the queue allocation after the setup() callback runs. This is safe because the setup() callback is not allowed to make any state changes that need to be undone on error (memory allocations, etc.). It may, however, make state changes that are undone by free_netdev() (such as netif_napi_add(), which is done by the ipoib driver's setup routine). The previous code also leaked a reference to the &init_net namespace object on RX/TX queue allocation failures. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-08net/caif: Fix dangling list pointer in freed object on error.David S. Miller1-2/+2
rtnl_link_ops->setup(), and the "setup" callback passed to alloc_netdev*(), cannot make state changes which need to be undone on failure. There is no cleanup mechanism available at this point. So we have to add the caif private instance to the global list once we are sure that register_netdev() has succedded in ->newlink(). Otherwise, if register_netdev() fails, the caller will invoke free_netdev() and we will have a reference to freed up memory on the chnl_net_list. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-08batman-adv: Linearize fragment packets before mergeSven Eckelmann1-5/+10
We access the data inside the skbs of two fragments directly using memmove during the merge. The data of the skb could span over multiple skb pages. An direct access without knowledge about the pages would lead to an invalid memory access. Signed-off-by: Sven Eckelmann <sven@narfation.org> [lindner_marek@yahoo.de: Move return from function to the end] Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2011-02-07x25: possible skb leak on bad facilitiesandrew hendry2-12/+30
Originally x25_parse_facilities returned -1 for an error 0 meaning 0 length facilities >0 the length of the facilities parsed. 5ef41308f94dc ("x25: Prevent crashing when parsing bad X.25 facilities") introduced more error checking in x25_parse_facilities however used 0 to indicate bad parsing a6331d6f9a429 ("memory corruption in X.25 facilities parsing") followed this further for DTE facilities, again using 0 for bad parsing. The meaning of 0 got confused in the callers. If the facilities are messed up we can't determine where the data starts. So patch makes all parsing errors return -1 and ensures callers close and don't use the skb further. Reported-by: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Hendry <andrew.hendry@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-07mac80211: fix the skb cloned check in the tx pathFelix Fietkau1-1/+1
Using skb_header_cloned to check if it's safe to write to the skb is not enough - mac80211 also touches the tailroom of the skb. Initially this check was only used to increase a counter, however this commit changed the code to also skip skb data reallocation if no extra head/tailroom was needed: commit 4cd06a344db752f513437138953af191cbe9a691 mac80211: skip unnecessary pskb_expand_head calls It added a regression at least with iwl3945, which is fixed by this patch. Reported-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Felix Fietkau <nbd@openwrt.org> Tested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-02-04bridge: Don't put partly initialized fdb into hashPavel Emelyanov1-2/+2
The fdb_create() puts a new fdb into hash with only addr set. This is not good, since there are callers, that search the hash w/o the lock and access all the other its fields. Applies to current netdev tree. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-03net: Provide compat support for SIOCGETMIFCNT_IN6 and SIOCGETSGCNT_IN6.David S. Miller2-0/+94
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-03net: Support compat SIOCGETVIFCNT ioctl in ipv4.David S. Miller1-0/+30
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-03net: Fix bug in compat SIOCGETSGCNT handling.David S. Miller1-1/+1
Commit 709b46e8d90badda1898caea50483c12af178e96 ("net: Add compat ioctl support for the ipv4 multicast ioctl SIOCGETSGCNT") added the correct plumbing to handle SIOCGETSGCNT properly. However, whilst definiting a proper "struct compat_sioc_sg_req" it isn't actually used in ipmr_compat_ioctl(). Correct this oversight. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-02gro: reset skb_iif on reuseAndy Gospodarek1-0/+1
Like Herbert's change from a few days ago: 66c46d741e2e60f0e8b625b80edb0ab820c46d7a gro: Reset dev pointer on reuse this may not be necessary at this point, but we should still clean up the skb->skb_iif. If not we may end up with an invalid valid for skb->skb_iif when the skb is reused and the check is done in __netif_receive_skb. Signed-off-by: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-02-02mac80211: fix TX status cookie in HW offload caseJohannes Berg3-2/+9
When the off-channel TX is done with remain-on-channel offloaded to hardware, the reported cookie is wrong as in that case we shouldn't use the SKB as the cookie but need to instead use the corresponding r-o-c cookie (XOR'ed with 2 to prevent API mismatches). Fix this by keeping track of the hw_roc_skb pointer just for the status processing and use the correct cookie to report in this case. We can't use the hw_roc_skb pointer itself because it is NULL'ed when the frame is transmitted to prevent it being used twice. This fixes a bug where the P2P state machine in the supplicant gets stuck because it never gets a correct result for its transmitted frame. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-02-02Bluetooth: Set conn state to BT_DISCONN to avoid multiple responsesBao Liang1-0/+1
This patch fixes a minor issue that two connection responses will be sent for one L2CAP connection request. If the L2CAP connection request is first blocked due to security reason and responded with reason "security block", the state of the connection remains BT_CONNECT2. If a pairing procedure completes successfully before the ACL connection is down, local host will send another connection complete response. See the following packets captured by hcidump. 2010-12-07 22:21:24.928096 < ACL data: handle 12 flags 0x00 dlen 16 0000: 0c 00 01 00 03 19 08 00 41 00 53 00 03 00 00 00 ........A.S..... ... ... 2010-12-07 22:21:35.791747 > HCI Event: Auth Complete (0x06) plen 3 status 0x00 handle 12 ... ... 2010-12-07 22:21:35.872372 > ACL data: handle 12 flags 0x02 dlen 16 L2CAP(s): Connect rsp: dcid 0x0054 scid 0x0040 result 0 status 0 Connection successful Signed-off-by: Liang Bao <tim.bao@gmail.com> Acked-by: Ville Tervo <ville.tervo@nokia.com> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-02-01netfilter: ecache: always set events bits, filter them laterPablo Neira Ayuso1-0/+3
For the following rule: iptables -I PREROUTING -t raw -j CT --ctevents assured The event delivered looks like the following: [UPDATE] tcp 6 src= dst= sport=37041 dport=80 src= dst= sport=80 dport=37041 [ASSURED] Note that the TCP protocol state is not included. For that reason the CT event filtering is not very useful for conntrackd. To resolve this issue, instead of conditionally setting the CT events bits based on the ctmask, we always set them and perform the filtering in the late stage, just before the delivery. Thus, the event delivered looks like the following: [UPDATE] tcp 6 432000 ESTABLISHED src= dst= sport=37041 dport=80 src= dst= sport=80 dport=37041 [ASSURED] Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net>
2011-02-01netfilter: arpt_mangle: fix return values of checkentryPablo Neira Ayuso1-3/+3
In 135367b "netfilter: xtables: change xt_target.checkentry return type", the type returned by checkentry was changed from boolean to int, but the return values where not adjusted. arptables: Input/output error This broke arptables with the mangle target since it returns true under success, which is interpreted by xtables as >0, thus returning EIO. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net>
2011-01-31net: Fix ipv6 neighbour unregister_sysctl_table warningEric W. Biederman1-1/+8
In my testing of 2.6.37 I was occassionally getting a warning about sysctl table entries being unregistered in the wrong order. Digging in it turns out this dates back to the last great sysctl reorg done where Al Viro introduced the requirement that sysctl directories needed to be created before and destroyed after the files in them. It turns out that in that great reorg /proc/sys/net/ipv6/neigh was overlooked. So this patch fixes that oversight and makes an annoying warning message go away. >------------[ cut here ]------------ >WARNING: at kernel/sysctl.c:1992 unregister_sysctl_table+0x134/0x164() >Pid: 23951, comm: kworker/u:3 Not tainted 2.6.37-350888.2010AroraKernelBeta.fc14.x86_64 #1 >Call Trace: > [<ffffffff8103e034>] warn_slowpath_common+0x80/0x98 > [<ffffffff8103e061>] warn_slowpath_null+0x15/0x17 > [<ffffffff810452f8>] unregister_sysctl_table+0x134/0x164 > [<ffffffff810e7834>] ? kfree+0xc4/0xd1 > [<ffffffff813439b2>] neigh_sysctl_unregister+0x22/0x3a > [<ffffffffa02cd14e>] addrconf_ifdown+0x33f/0x37b [ipv6] > [<ffffffff81331ec2>] ? skb_dequeue+0x5f/0x6b > [<ffffffffa02ce4a5>] addrconf_notify+0x69b/0x75c [ipv6] > [<ffffffffa02eb953>] ? ip6mr_device_event+0x98/0xa9 [ipv6] > [<ffffffff813d2413>] notifier_call_chain+0x32/0x5e > [<ffffffff8105bdea>] raw_notifier_call_chain+0xf/0x11 > [<ffffffff8133cdac>] call_netdevice_notifiers+0x45/0x4a > [<ffffffff8133d2b0>] rollback_registered_many+0x118/0x201 > [<ffffffff8133d3af>] unregister_netdevice_many+0x16/0x6d > [<ffffffff8133d571>] default_device_exit_batch+0xa4/0xb8 > [<ffffffff81337c42>] ? cleanup_net+0x0/0x194 > [<ffffffff81337a2a>] ops_exit_list+0x4e/0x56 > [<ffffffff81337d36>] cleanup_net+0xf4/0x194 > [<ffffffff81053318>] process_one_work+0x187/0x280 > [<ffffffff8105441b>] worker_thread+0xff/0x19f > [<ffffffff8105431c>] ? worker_thread+0x0/0x19f > [<ffffffff8105776d>] kthread+0x7d/0x85 > [<ffffffff81003824>] kernel_thread_helper+0x4/0x10 > [<ffffffff810576f0>] ? kthread+0x0/0x85 > [<ffffffff81003820>] ? kernel_thread_helper+0x0/0x10 >---[ end trace 8a7e9310b35e9486 ]--- Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-31net: Check rps_flow_table when RPS map length is 1Tom Herbert1-1/+2
In get_rps_cpu, add check that the rps_flow_table for the device is NULL when trying to take fast path when RPS map length is one. Without this, RFS is effectively disabled if map length is one which is not correct. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-31net: Add default_mtu() methods to blackhole dst_opsRoland Dreier2-0/+12
When an IPSEC SA is still being set up, __xfrm_lookup() will return -EREMOTE and so ip_route_output_flow() will return a blackhole route. This can happen in a sndmsg call, and after d33e455337ea ("net: Abstract default MTU metric calculation behind an accessor.") this leads to a crash in ip_append_data() because the blackhole dst_ops have no default_mtu() method and so dst_mtu() calls a NULL pointer. Fix this by adding default_mtu() methods (that simply return 0, matching the old behavior) to the blackhole dst_ops. The IPv4 part of this patch fixes a crash that I saw when using an IPSEC VPN; the IPv6 part is untested because I don't have an IPv6 VPN, but it looks to be needed as well. Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-30batman-adv: Make vis info stack traversal threadsafeSven Eckelmann1-3/+4
The batman-adv vis server has to a stack which stores all information about packets which should be send later. This stack is protected with a spinlock that is used to prevent concurrent write access to it. The send_vis_packets function has to take all elements from the stack and send them to other hosts over the primary interface. The send will be initiated without the lock which protects the stack. The implementation using list_for_each_entry_safe has the problem that it stores the next element as "safe ptr" to allow the deletion of the current element in the list. The list may be modified during the unlock/lock pair in the loop body which may make the safe pointer not pointing to correct next element. It is safer to remove and use the first element from the stack until no elements are available. This does not need reduntant information which would have to be validated each time the lock was removed. Reported-by: Russell Senior <russell@personaltelco.net> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-01-30batman-adv: Remove vis info element in free_infoSven Eckelmann1-0/+1
The free_info function will be called when no reference to the info object exists anymore. It must be ensured that the allocated memory gets freed and not only the elements which are managed by the info object. Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-01-30batman-adv: Remove vis info on hashing errorsSven Eckelmann1-1/+1
A newly created vis info object must be removed when it couldn't be added to the hash. The old_info which has to be replaced was already removed and isn't related to the hash anymore. Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-01-30net: Add compat ioctl support for the ipv4 multicast ioctl SIOCGETSGCNTEric W. Biederman3-0/+81
SIOCGETSGCNT is not a unique ioctl value as it it maps tio SIOCPROTOPRIVATE +1, which unfortunately means the existing infrastructure for compat networking ioctls is insufficient. A trivial compact ioctl implementation would conflict with: SIOCAX25ADDUID SIOCAIPXPRISLT SIOCGETSGCNT_IN6 SIOCGETSGCNT SIOCRSSCAUSE SIOCX25SSUBSCRIP SIOCX25SDTEFACILITIES To make this work I have updated the compat_ioctl decode path to mirror the the normal ioctl decode path. I have added an ipv4 inet_compat_ioctl function so that I can have ipv4 specific compat ioctls. I have added a compat_ioctl function into struct proto so I can break out ioctls by which kind of ip socket I am using. I have added a compat_raw_ioctl function because SIOCGETSGCNT only works on raw sockets. I have added a ipmr_compat_ioctl that mirrors the normal ipmr_ioctl. This was necessary because unfortunately the struct layout for the SIOCGETSGCNT has unsigned longs in it so changes between 32bit and 64bit kernels. This change was sufficient to run a 32bit ip multicast routing daemon on a 64bit kernel. Reported-by: Bill Fenner <fenner@aristanetworks.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-30net: Fix ip link add netns oopsEric W. Biederman1-0/+3
Ed Swierk <eswierk@bigswitch.com> writes: > On > ip link add link eth0 netns 9999 type macvlan > where 9999 is a nonexistent PID triggers an oops and causes all network functions to hang: > [10663.821898] BUG: unable to handle kernel NULL pointer dereference at 000000000000006d > [10663.821917] IP: [<ffffffff8149c2fa>] __dev_alloc_name+0x9a/0x170 > [10663.821933] PGD 1d3927067 PUD 22f5c5067 PMD 0 > [10663.821944] Oops: 0000 [#1] SMP > [10663.821953] last sysfs file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq > [10663.821959] CPU 3 > [10663.821963] Modules linked in: macvlan ip6table_filter ip6_tables rfcomm ipt_MASQUERADE binfmt_misc iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack sco ipt_REJECT bnep l2cap xt_tcpudp iptable_filter ip_tables x_tables bridge stp vboxnetadp vboxnetflt vboxdrv kvm_intel kvm parport_pc ppdev snd_hda_codec_intelhdmi snd_hda_codec_conexant arc4 iwlagn iwlcore mac80211 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi i915 snd_seq_midi_event snd_seq thinkpad_acpi drm_kms_helper btusb tpm_tis nvram uvcvideo snd_timer snd_seq_device bluetooth videodev v4l1_compat v4l2_compat_ioctl32 tpm drm tpm_bios snd cfg80211 psmouse serio_raw intel_ips soundcore snd_page_alloc intel_agp i2c_algo_bit video output netconsole configfs lp parport usbhid hid e1000e sdhci_pci ahci libahci sdhci led_class > [10663.822155] > [10663.822161] Pid: 6000, comm: ip Not tainted 2.6.35-23-generic #41-Ubuntu 2901CTO/2901CTO > [10663.822167] RIP: 0010:[<ffffffff8149c2fa>] [<ffffffff8149c2fa>] __dev_alloc_name+0x9a/0x170 > [10663.822177] RSP: 0018:ffff88014aebf7b8 EFLAGS: 00010286 > [10663.822182] RAX: 00000000fffffff4 RBX: ffff8801ad900800 RCX: 0000000000000000 > [10663.822187] RDX: ffff880000000000 RSI: 0000000000000000 RDI: ffff88014ad63000 > [10663.822191] RBP: ffff88014aebf808 R08: 0000000000000041 R09: 0000000000000041 > [10663.822196] R10: 0000000000000000 R11: dead000000200200 R12: ffff88014aebf818 > [10663.822201] R13: fffffffffffffffd R14: ffff88014aebf918 R15: ffff88014ad62000 > [10663.822207] FS: 00007f00c487f700(0000) GS:ffff880001f80000(0000) knlGS:0000000000000000 > [10663.822212] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [10663.822216] CR2: 000000000000006d CR3: 0000000231f19000 CR4: 00000000000026e0 > [10663.822221] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > [10663.822226] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > [10663.822231] Process ip (pid: 6000, threadinfo ffff88014aebe000, task ffff88014afb16e0) > [10663.822236] Stack: > [10663.822240] ffff88014aebf808 ffffffff814a2bb5 ffff88014aebf7e8 00000000a00ee8d6 > [10663.822251] <0> 0000000000000000 ffffffffa00ef940 ffff8801ad900800 ffff88014aebf818 > [10663.822265] <0> ffff88014aebf918 ffff8801ad900800 ffff88014aebf858 ffffffff8149c413 > [10663.822281] Call Trace: > [10663.822290] [<ffffffff814a2bb5>] ? dev_addr_init+0x75/0xb0 > [10663.822298] [<ffffffff8149c413>] dev_alloc_name+0x43/0x90 > [10663.822307] [<ffffffff814a85ee>] rtnl_create_link+0xbe/0x1b0 > [10663.822314] [<ffffffff814ab2aa>] rtnl_newlink+0x48a/0x570 > [10663.822321] [<ffffffff814aafcc>] ? rtnl_newlink+0x1ac/0x570 > [10663.822332] [<ffffffff81030064>] ? native_x2apic_icr_read+0x4/0x20 > [10663.822339] [<ffffffff814a8c17>] rtnetlink_rcv_msg+0x177/0x290 > [10663.822346] [<ffffffff814a8aa0>] ? rtnetlink_rcv_msg+0x0/0x290 > [10663.822354] [<ffffffff814c25d9>] netlink_rcv_skb+0xa9/0xd0 > [10663.822360] [<ffffffff814a8a85>] rtnetlink_rcv+0x25/0x40 > [10663.822367] [<ffffffff814c223e>] netlink_unicast+0x2de/0x2f0 > [10663.822374] [<ffffffff814c303e>] netlink_sendmsg+0x1fe/0x2e0 > [10663.822383] [<ffffffff81488533>] sock_sendmsg+0xf3/0x120 > [10663.822391] [<ffffffff815899fe>] ? _raw_spin_lock+0xe/0x20 > [10663.822400] [<ffffffff81168656>] ? __d_lookup+0x136/0x150 > [10663.822406] [<ffffffff815899fe>] ? _raw_spin_lock+0xe/0x20 > [10663.822414] [<ffffffff812b7a0d>] ? _atomic_dec_and_lock+0x4d/0x80 > [10663.822422] [<ffffffff8116ea90>] ? mntput_no_expire+0x30/0x110 > [10663.822429] [<ffffffff81486ff5>] ? move_addr_to_kernel+0x65/0x70 > [10663.822435] [<ffffffff81493308>] ? verify_iovec+0x88/0xe0 > [10663.822442] [<ffffffff81489020>] sys_sendmsg+0x240/0x3a0 > [10663.822450] [<ffffffff8111e2a9>] ? __do_fault+0x479/0x560 > [10663.822457] [<ffffffff815899fe>] ? _raw_spin_lock+0xe/0x20 > [10663.822465] [<ffffffff8116cf4a>] ? alloc_fd+0x10a/0x150 > [10663.822473] [<ffffffff8158d76e>] ? do_page_fault+0x15e/0x350 > [10663.822482] [<ffffffff8100a0f2>] system_call_fastpath+0x16/0x1b > [10663.822487] Code: 90 48 8d 78 02 be 25 00 00 00 e8 92 1d e2 ff 48 85 c0 75 cf bf 20 00 00 00 e8 c3 b1 c6 ff 49 89 c7 b8 f4 ff ff ff 4d 85 ff 74 bd <4d> 8b 75 70 49 8d 45 70 48 89 45 b8 49 83 ee 58 eb 28 48 8d 55 > [10663.822618] RIP [<ffffffff8149c2fa>] __dev_alloc_name+0x9a/0x170 > [10663.822627] RSP <ffff88014aebf7b8> > [10663.822631] CR2: 000000000000006d > [10663.822636] ---[ end trace 3dfd6c3ad5327ca7 ]--- This bug was introduced in: commit 81adee47dfb608df3ad0b91d230fb3cef75f0060 Author: Eric W. Biederman <ebiederm@aristanetworks.com> Date: Sun Nov 8 00:53:51 2009 -0800 net: Support specifying the network namespace upon device creation. There is no good reason to not support userspace specifying the network namespace during device creation, and it makes it easier to create a network device and pass it to a child network namespace with a well known name. We have to be careful to ensure that the target network namespace for the new device exists through the life of the call. To keep that logic clear I have factored out the network namespace grabbing logic into rtnl_link_get_net. In addtion we need to continue to pass the source network namespace to the rtnl_link_ops.newlink method so that we can find the base device source network namespace. Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Where apparently I forgot to add error handling to the path where we create a new network device in a new network namespace, and pass in an invalid pid. Cc: stable@kernel.org Reported-by: Ed Swierk <eswierk@bigswitch.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-29gro: Reset dev pointer on reuseHerbert Xu1-0/+1
On older kernels the VLAN code may zero skb->dev before dropping it and causing it to be reused by GRO. Unfortunately we didn't reset skb->dev in that case which causes the next GRO user to get a bogus skb->dev pointer. This particular problem no longer happens with the current upstream kernel due to changes in VLAN processing. However, for correctness we should still reset the skb->dev pointer in the GRO reuse function in case a future user does the same thing. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-27ipv6: Remove route peer binding assertions.David S. Miller1-4/+0
They are bogus. The basic idea is that I wanted to make sure that prefixed routes never bind to peers. The test I used was whether RTF_CACHE was set. But first of all, the RTF_CACHE flag is set at different spots depending upon which ip6_rt_copy() caller you're talking about. I've validated all of the code paths, and even in the future where we bind peers more aggressively (for route metric COW'ing) we never bind to prefix'd routes, only fully specified ones. This even applies when addrconf or icmp6 routes are allocated. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-27net: add kmemcheck annotation in __alloc_skb()Eric Dumazet1-0/+1
pskb_expand_head() triggers a kmemcheck warning when copy of skb_shared_info is done in pskb_expand_head() This is because destructor_arg field is not necessarily initialized at this point. Add kmemcheck_annotate_variable() call in __alloc_skb() to instruct kmemcheck this is a normal situation. Resolves bugzilla.kernel.org 27212 Reference: https://bugzilla.kernel.org/show_bug.cgi?id=27212 Reported-by: Christian Casteyde <casteyde.christian@free.fr> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-27net: fix validate_link_af in rtnetlink coreKurt Van Dijck1-2/+1
I'm testing an API that uses IFLA_AF_SPEC attribute. In the rtnetlink core , the set_link_af() member of the rtnl_af_ops struct receives the nested attribute (as I expected), but the validate_link_af() member receives the parent attribute. IMO, this patch fixes this. Signed-off-by: Kurt Van Dijck <kurt.van.dijck@eia.be> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-27econet: remove compiler warningsEric Dumazet1-2/+2
net/econet/af_econet.c: In function ‘econet_sendmsg’: net/econet/af_econet.c:494: warning: label ‘error’ defined but not used net/econet/af_econet.c:268: warning: unused variable ‘sk’ Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Phil Blundell <philb@gnu.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-26xfrm6: Don't forget to propagate peer into ipsec route.David S. Miller1-0/+6
Like ipv4, we have to propagate the ipv6 route peer into the ipsec top-level route during instantiation. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-25batman-adv: Fix kernel panic when fetching vis data on a vis serverLinus Lüssing1-2/+2
The hash_iterate removal introduced a bug leading to a kernel panic when fetching the vis data on a vis server. That commit forgot to rename one variable name, which this commit fixes now. Reported-by: Russell Senior <russell@personaltelco.net> Signed-off-by: Linus Lüssing <linus.luessing@web.de> Signed-off-by: Sven Eckelmann <sven@narfation.org>
2011-01-25TCP: fix a bug that triggers large number of TCP RST by mistakeJerry Chu1-1/+1
This patch fixes a bug that causes TCP RST packets to be generated on otherwise correctly behaved applications, e.g., no unread data on close,..., etc. To trigger the bug, at least two conditions must be met: 1. The FIN flag is set on the last data packet, i.e., it's not on a separate, FIN only packet. 2. The size of the last data chunk on the receive side matches exactly with the size of buffer posted by the receiver, and the receiver closes the socket without any further read attempt. This bug was first noticed on our netperf based testbed for our IW10 proposal to IETF where a large number of RST packets were observed. netperf's read side code meets the condition 2 above 100%. Before the fix, tcp_data_queue() will queue the last skb that meets condition 1 to sk_receive_queue even though it has fully copied out (skb_copy_datagram_iovec()) the data. Then if condition 2 is also met, tcp_recvmsg() often returns all the copied out data successfully without actually consuming the skb, due to a check "if ((chunk = len - tp->ucopy.len) != 0) {" and "len -= chunk;" after tcp_prequeue_process() that causes "len" to become 0 and an early exit from the big while loop. I don't see any reason not to free the skb whose data have been fully consumed in tcp_data_queue(), regardless of the FIN flag. We won't get there if MSG_PEEK is on. Am I missing some arcane cases related to urgent data? Signed-off-by: H.K. Jerry Chu <hkchu@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-25mac80211: fix a crash in ieee80211_beacon_get_tim on change_interfaceFelix Fietkau1-0/+3
Some drivers (e.g. ath9k) do not always disable beacons when they're supposed to. When an interface is changed using the change_interface op, the mode specific sdata part is in an undefined state and trying to get a beacon at this point can produce weird crashes. To fix this, add a check for ieee80211_sdata_running before using anything from the sdata. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Cc: stable@kernel.org Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-01-25ipv6: Revert 'administrative down' address handling changes.David S. Miller1-48/+33
This reverts the following set of commits: d1ed113f1669390da9898da3beddcc058d938587 ("ipv6: remove duplicate neigh_ifdown") 29ba5fed1bbd09c2cba890798c8f9eaab251401d ("ipv6: don't flush routes when setting loopback down") 9d82ca98f71fd686ef2f3017c5e3e6a4871b6e46 ("ipv6: fix missing in6_ifa_put in addrconf") 2de795707294972f6c34bae9de713e502c431296 ("ipv6: addrconf: don't remove address state on ifdown if the address is being kept") 8595805aafc8b077e01804c9a3668e9aa3510e89 ("IPv6: only notify protocols if address is compeletely gone") 27bdb2abcc5edb3526e25407b74bf17d1872c329 ("IPv6: keep tentative addresses in hash table") 93fa159abe50d3c55c7f83622d3f5c09b6e06f4b ("IPv6: keep route for tentative address") 8f37ada5b5f6bfb4d251a7f510f249cb855b77b3 ("IPv6: fix race between cleanup and add/delete address") 84e8b803f1e16f3a2b8b80f80a63fa2f2f8a9be6 ("IPv6: addrconf notify when address is unavailable") dc2b99f71ef477a31020511876ab4403fb7c4420 ("IPv6: keep permanent addresses on admin down") because the core semantic change to ipv6 address handling on ifdown has broken some things, in particular "disable_ipv6" sysctl handling. Stephen has made several attempts to get things back in working order, but nothing has restored disable_ipv6 fully yet. Reported-by: Eric W. Biederman <ebiederm@xmission.com> Tested-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>