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2012-09-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) Use after free and new device IDs in bluetooth from Andre Guedes, Yevgeniy Melnichuk, Gustavo Padovan, and Henrik Rydberg. 2) Fix crashes with short packet lengths and VLAN in pktgen, from Nishank Trivedi. 3) mISDN calls flush_work_sync() with locks held, fix from Karsten Keil. 4) Packet scheduler gred parameters are reported to userspace improperly scaled, and WRED idling is not performed correctly. All from David Ward. 5) Fix TCP socket refcount problem in ipv6, from Julian Anastasov. 6) ibmveth device has RX queue alignment requirements which are not being explicitly met resulting in sporadic failures, fix from Santiago Leon. 7) Netfilter needs to take care when interpreting sockets attached to socket buffers, they could be time-wait minisockets. Fix from Eric Dumazet. 8) sock_edemux() has the same issue as netfilter did in #7 above, fix from Eric Dumazet. 9) Avoid infinite loops in CBQ scheduler with some configurations, from Eric Dumazet. 10) Deal with "Reflection scan: an Off-Path Attack on TCP", from Jozsef Kadlecsik. 11) SCTP overcharges socket for TX packets, fix from Thomas Graf. 12) CODEL packet scheduler should not reset it's state every time it builds a new flow, fix from Eric Dumazet. 13) Fix memory leak in nl80211, from Wei Yongjun. 14) NETROM doesn't check skb_copy_datagram_iovec() return values, from Alan Cox. 15) l2tp ethernet was using sizeof(ETH_HLEN) instead of plain ETH_HLEN, oops. From Eric Dumazet. 16) Fix selection of ath9k chips on which PA linearization and AM2PM predistoration are used, from Felix Fietkau. 17) Flow steering settings in mlx4 driver need to be validated properly, from Hadar Hen Zion. 18) bnx2x doesn't show the correct link duplex setting, from Yaniv Rosner. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (75 commits) pktgen: fix crash with vlan and packet size less than 46 bnx2x: Add missing afex code bnx2x: fix registers dumped bnx2x: correct advertisement of pause capabilities bnx2x: display the correct duplex value bnx2x: prevent timeouts when using PFC bnx2x: fix stats copying logic bnx2x: Avoid sending multiple statistics queries net: qmi_wwan: call subdriver with control intf only net_sched: gred: actually perform idling in WRED mode net_sched: gred: fix qave reporting via netlink net_sched: gred: eliminate redundant DP prio comparisons net_sched: gred: correct comment about qavg calculation in RIO mode mISDN: Fix wrong usage of flush_work_sync while holding locks netfilter: log: Fix log-level processing net-sched: sch_cbq: avoid infinite loop net: qmi_wwan: fix Gobi device probing for un2430 net: fix net/core/sock.c build error ixp4xx_hss: fix build failure due to missing linux/module.h inclusion caif: move the dereference below the NULL test ...
2012-09-13pktgen: fix crash with vlan and packet size less than 46Nishank Trivedi
If vlan option is being specified in the pktgen and packet size being requested is less than 46 bytes, despite being illogical request, pktgen should not crash the kernel. BUG: unable to handle kernel paging request at ffff88021fb82000 Process kpktgend_0 (pid: 1184, threadinfo ffff880215f1a000, task ffff880218544530) Call Trace: [<ffffffffa0637cd2>] ? pktgen_finalize_skb+0x222/0x300 [pktgen] [<ffffffff814f0084>] ? build_skb+0x34/0x1c0 [<ffffffffa0639b11>] pktgen_thread_worker+0x5d1/0x1790 [pktgen] [<ffffffffa03ffb10>] ? igb_xmit_frame_ring+0xa30/0xa30 [igb] [<ffffffff8107ba20>] ? wake_up_bit+0x40/0x40 [<ffffffff8107ba20>] ? wake_up_bit+0x40/0x40 [<ffffffffa0639540>] ? spin+0x240/0x240 [pktgen] [<ffffffff8107b4e3>] kthread+0x93/0xa0 [<ffffffff81615de4>] kernel_thread_helper+0x4/0x10 [<ffffffff8107b450>] ? flush_kthread_worker+0x80/0x80 [<ffffffff81615de0>] ? gs_change+0x13/0x13 The root cause of why pktgen is not able to handle this case is due to comparison of signed (datalen) and unsigned data (sizeof), which eventually passes a huge number to skb_put(). Signed-off-by: Nishank Trivedi <nistrive@cisco.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-13net_sched: gred: actually perform idling in WRED modeDavid Ward
gred_dequeue() and gred_drop() do not seem to get called when the queue is empty, meaning that we never start idling while in WRED mode. And since qidlestart is not stored by gred_store_wred_set(), we would never stop idling while in WRED mode if we ever started. This messes up the average queue size calculation that influences packet marking/dropping behavior. Now, we start WRED mode idling as we are removing the last packet from the queue. Also we now actually stop WRED mode idling when we are enqueuing a packet. Cc: Bruce Osler <brosler@cisco.com> Signed-off-by: David Ward <david.ward@ll.mit.edu> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-13net_sched: gred: fix qave reporting via netlinkDavid Ward
q->vars.qavg is a Wlog scaled value, but q->backlog is not. In order to pass q->vars.qavg as the backlog value, we need to un-scale it. Additionally, the qave value returned via netlink should not be Wlog scaled, so we need to un-scale the result of red_calc_qavg(). This caused artificially high values for "Average Queue" to be shown by 'tc -s -d qdisc', but did not affect the actual operation of GRED. Signed-off-by: David Ward <david.ward@ll.mit.edu> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-13net_sched: gred: eliminate redundant DP prio comparisonsDavid Ward
Each pair of DPs only needs to be compared once when searching for a non-unique prio value. Signed-off-by: David Ward <david.ward@ll.mit.edu> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-13net_sched: gred: correct comment about qavg calculation in RIO modeDavid Ward
Signed-off-by: David Ward <david.ward@ll.mit.edu> Acked-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-13Merge branch 'master' of git://1984.lsi.us.es/nfDavid S. Miller
Pablo Neira Ayuso say: ==================== The following patchset contains four updates for your net tree, they are: * Fix crash on timewait sockets, since the TCP early demux was added, in nfnetlink_log, from Eric Dumazet. * Fix broken syslog log-level for xt_LOG and ebt_log since printk format was converted from <.> to a 2 bytes pattern using ASCII SOH, from Joe Perches. * Two security fixes for the TCP connection tracking targeting off-path attacks, from Jozsef Kadlecsik. The problem was discovered by Jan Wrobel and it is documented in: http://mixedbit.org/reflection_scan/reflection_scan.pdf. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-13Merge tag 'nfs-for-3.6-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds
Pull NFS client bugfixes from Trond Myklebust: - Final (hopefully) fix for the range checking code in NFSv4 getacl. This should fix the Oopses being seen when the acl size is close to PAGE_SIZE. - Fix a regression with the legacy binary mount code - Fix a regression in the readdir cookieverf initialisation - Fix an RPC over UDP regression - Ensure that we report all errors in the NFSv4 open code - Ensure that fsync() reports all relevant synchronisation errors. * tag 'nfs-for-3.6-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: NFS: fsync() must exit with an error if page writeback failed SUNRPC: Fix a UDP transport regression NFS: return error from decode_getfh in decode open NFSv4: Fix buffer overflow checking in __nfs4_get_acl_uncached NFSv4: Fix range checking in __nfs4_get_acl_uncached and __nfs4_proc_set_acl NFS: Fix a problem with the legacy binary mount code NFS: Fix the initialisation of the readdir 'cookieverf' array
2012-09-12netfilter: log: Fix log-level processingJoe Perches
auto75914331@hushmail.com reports that iptables does not correctly output the KERN_<level>. $IPTABLES -A RULE_0_in -j LOG --log-level notice --log-prefix "DENY in: " result with linux 3.6-rc5 Sep 12 06:37:29 xxxxx kernel: <5>DENY in: IN=eth0 OUT= MAC=....... result with linux 3.5.3 and older: Sep 9 10:43:01 xxxxx kernel: DENY in: IN=eth0 OUT= MAC...... commit 04d2c8c83d0 ("printk: convert the format for KERN_<LEVEL> to a 2 byte pattern") updated the syslog header style but did not update netfilter uses. Do so. Use KERN_SOH and string concatenation instead of "%c" KERN_SOH_ASCII as suggested by Eric Dumazet. Signed-off-by: Joe Perches <joe@perches.com> cc: auto75914331@hushmail.com Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-09-11net-sched: sch_cbq: avoid infinite loopEric Dumazet
Its possible to setup a bad cbq configuration leading to an infinite loop in cbq_classify() DEV_OUT=eth0 ICMP="match ip protocol 1 0xff" U32="protocol ip u32" DST="match ip dst" tc qdisc add dev $DEV_OUT root handle 1: cbq avpkt 1000 \ bandwidth 100mbit tc class add dev $DEV_OUT parent 1: classid 1:1 cbq \ rate 512kbit allot 1500 prio 5 bounded isolated tc filter add dev $DEV_OUT parent 1: prio 3 $U32 \ $ICMP $DST 192.168.3.234 flowid 1: Reported-by: Denys Fedoryschenko <denys@visp.net.lb> Tested-by: Denys Fedoryschenko <denys@visp.net.lb> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-10net: fix net/core/sock.c build errorRandy Dunlap
Fix net/core/sock.c build error when CONFIG_INET is not enabled: net/built-in.o: In function `sock_edemux': (.text+0xd396): undefined reference to `inet_twsk_put' Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-10caif: move the dereference below the NULL testWei Yongjun
The dereference should be moved below the NULL test. spatch with a semantic match is used to found this. (http://coccinelle.lip6.fr/) Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-09netfilter: Validate the sequence number of dataless ACK packets as wellJozsef Kadlecsik
We spare nothing by not validating the sequence number of dataless ACK packets and enabling it makes harder off-path attacks. See: "Reflection scan: an Off-Path Attack on TCP" by Jan Wrobel, http://arxiv.org/abs/1201.2074 Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-09-09netfilter: Mark SYN/ACK packets as invalid from original directionJozsef Kadlecsik
Clients should not send such packets. By accepting them, we open up a hole by wich ephemeral ports can be discovered in an off-path attack. See: "Reflection scan: an Off-Path Attack on TCP" by Jan Wrobel, http://arxiv.org/abs/1201.2074 Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-09-08net: small bug on rxhash calculationChema Gonzalez
In the current rxhash calculation function, while the sorting of the ports/addrs is coherent (you get the same rxhash for packets sharing the same 4-tuple, in both directions), ports and addrs are sorted independently. This implies packets from a connection between the same addresses but crossed ports hash to the same rxhash. For example, traffic between A=S:l and B=L:s is hashed (in both directions) from {L, S, {s, l}}. The same rxhash is obtained for packets between C=S:s and D=L:l. This patch ensures that you either swap both addrs and ports, or you swap none. Traffic between A and B, and traffic between C and D, get their rxhash from different sources ({L, S, {l, s}} for A<->B, and {L, S, {s, l}} for C<->D) The patch is co-written with Eric Dumazet <edumazet@google.com> Signed-off-by: Chema Gonzalez <chema@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-07Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem John W. Linville says: ==================== Please pull these fixes intended for 3.6. There are more commits here than I would like -- I got a bit behind while I was stalking Steven Rostedt in San Diego last week... I'll slow it down after this! There are a couple of pulls here. One is from Johannes: "Please pull (according to the below information) to get a few fixes. * a fix to properly disconnect in the driver when authentication or association fails * a fix to prevent invalid information about mesh paths being reported to userspace * a memory leak fix in an nl80211 error path" The other comes via Gustavo: "A few updates for the 3.6 kernel. There are two btusb patches to add more supported devices through the new USB_VENDOR_AND_INTEFACE_INFO() macro and another one that add a new device id for a Sony Vaio laptop, one fix for a user-after-free and, finally, two patches from Vinicius to fix a issue in SMP pairing." Along with those... Arend van Spriel provides a fix for a use-after-free bug in brcmfmac. Daniel Drake avoids a hang by not trying to touch the libertas hardware duing suspend if it is already powered-down. Felix Fietkau provides a batch of ath9k fixes that adress some potential problems with power settings, as well as a fix to avoid a potential interrupt storm. Gertjan van Wingerde provides a register-width fix for rt2x00, and a rt2x00 fix to prevent incorrectly detecting the rfkill status. He also provides a device ID patch. Hante Meuleman gives us three brcmfmac fixes, one that properly initializes a command structure, one that fixes a race condition that could lose usb requests, and one that removes some log spam. Marc Kleine-Budde offers an rt2x00 fix for a voltage setting on some specific devices. Mohammed Shafi Shajakhan sent an ath9k fix to avoid a crash related to using timers that aren't allocated when 2 wire bluetooth coexistence hardware is in use. Sergei Poselenov changes rt2800usb to do some validity checking for received packets, avoiding crashes on an ARM Soc. Stone Piao gives us an mwifiex fix for an incorrectly set skb length value for a command buffer. All of these are localized to their specific drivers, and relatively small. The power-related patches from Felix are bigger than I would like, but I merged them in consideration of their isolation to ath9k and the sensitive nature of power settings in wireless devices. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-07udp: increment UDP_MIB_INERRORS if copy failedEric Dumazet
In UDP recvmsg(), we miss an increase of UDP_MIB_INERRORS if the copy of skb to userspace failed for whatever reason. Reported-by: Shawn Bohrer <sbohrer@rgmadvisors.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-07SUNRPC: Fix a UDP transport regressionTrond Myklebust
Commit 43cedbf0e8dfb9c5610eb7985d5f21263e313802 (SUNRPC: Ensure that we grab the XPRT_LOCK before calling xprt_alloc_slot) is causing hangs in the case of NFS over UDP mounts. Since neither the UDP or the RDMA transport mechanism use dynamic slot allocation, we can skip grabbing the socket lock for those transports. Add a new rpc_xprt_op to allow switching between the TCP and UDP/RDMA case. Note that the NFSv4.1 back channel assigns the slot directly through rpc_run_bc_task, so we can ignore that case. Reported-by: Dick Streefland <dick.streefland@altium.nl> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@vger.kernel.org [>= 3.1]
2012-09-06netfilter: take care of timewait socketsEric Dumazet
Sami Farin reported crashes in xt_LOG because it assumes skb->sk is a full blown socket. Since (41063e9 ipv4: Early TCP socket demux), we can have skb->sk pointing to a timewait socket. Same fix is needed in nfnetlink_log. Diagnosed-by: Florian Westphal <fw@strlen.de> Reported-by: Sami Farin <hvtaifwkbgefbaei@gmail.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-09-05Fix order of arguments to compat_put_time[spec|val]Mikulas Patocka
Commit 644595f89620 ("compat: Handle COMPAT_USE_64BIT_TIME in net/socket.c") introduced a bug where the helper functions to take either a 64-bit or compat time[spec|val] got the arguments in the wrong order, passing the kernel stack pointer off as a user pointer (and vice versa). Because of the user address range check, that in turn then causes an EFAULT due to the user pointer range checking failing for the kernel address. Incorrectly resuling in a failed system call for 32-bit processes with a 64-bit kernel. On odder architectures like HP-PA (with separate user/kernel address spaces), it can be used read kernel memory. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-09-05tcp: fix possible socket refcount problem for ipv6Julian Anastasov
commit 144d56e91044181ec0ef67aeca91e9a8b5718348 ("tcp: fix possible socket refcount problem") is missing the IPv6 part. As tcp_release_cb is shared by both protocols we should hold sock reference for the TCP_MTU_REDUCED_DEFERRED bit. Signed-off-by: Julian Anastasov <ja@ssi.bg> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-05Merge branch 'for-john' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
2012-09-05Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth
2012-09-05mac80211: Various small fixes for cfg.c: mpath_set_pinfo()LEO Airwarosu Yoichi Shinoda
Various small fixes for net/mac80211/cfg.c:mpath_set_pinfo(): Initialize *pinfo before filling members in, handle MESH_PATH_RESOLVED correctly, and remove bogus assignment; result in correct display of FLAGS values and meaningful EXPTIME for expired paths in iw utility. Signed-off-by: Yoichi Shinoda <shinoda@jaist.ac.jp> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-04l2tp: fix a typo in l2tp_eth_dev_recv()Eric Dumazet
While investigating l2tp bug, I hit a bug in eth_type_trans(), because not enough bytes were pulled in skb head. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-04Merge branch 'fixes' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/jesse/openvswitch
2012-09-04xfrm: Workaround incompatibility of ESN and async cryptoSteffen Klassert
ESN for esp is defined in RFC 4303. This RFC assumes that the sequence number counters are always up to date. However, this is not true if an async crypto algorithm is employed. If the sequence number counters are not up to date on sequence number check, we may incorrectly update the upper 32 bit of the sequence number. This leads to a DOS. We workaround this by comparing the upper sequence number, (used for authentication) with the upper sequence number computed after the async processing. We drop the packet if these numbers are different. To do this, we introduce a recheck function that does this check in the ESN case. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-04l2tp: fix a lockdep splatEric Dumazet
Fixes following lockdep splat : [ 1614.734896] ============================================= [ 1614.734898] [ INFO: possible recursive locking detected ] [ 1614.734901] 3.6.0-rc3+ #782 Not tainted [ 1614.734903] --------------------------------------------- [ 1614.734905] swapper/11/0 is trying to acquire lock: [ 1614.734907] (slock-AF_INET){+.-...}, at: [<ffffffffa0209d72>] l2tp_xmit_skb+0x172/0xa50 [l2tp_core] [ 1614.734920] [ 1614.734920] but task is already holding lock: [ 1614.734922] (slock-AF_INET){+.-...}, at: [<ffffffff815fce23>] tcp_v4_err+0x163/0x6b0 [ 1614.734932] [ 1614.734932] other info that might help us debug this: [ 1614.734935] Possible unsafe locking scenario: [ 1614.734935] [ 1614.734937] CPU0 [ 1614.734938] ---- [ 1614.734940] lock(slock-AF_INET); [ 1614.734943] lock(slock-AF_INET); [ 1614.734946] [ 1614.734946] *** DEADLOCK *** [ 1614.734946] [ 1614.734949] May be due to missing lock nesting notation [ 1614.734949] [ 1614.734952] 7 locks held by swapper/11/0: [ 1614.734954] #0: (rcu_read_lock){.+.+..}, at: [<ffffffff81592801>] __netif_receive_skb+0x251/0xd00 [ 1614.734964] #1: (rcu_read_lock){.+.+..}, at: [<ffffffff815d319c>] ip_local_deliver_finish+0x4c/0x4e0 [ 1614.734972] #2: (rcu_read_lock){.+.+..}, at: [<ffffffff8160d116>] icmp_socket_deliver+0x46/0x230 [ 1614.734982] #3: (slock-AF_INET){+.-...}, at: [<ffffffff815fce23>] tcp_v4_err+0x163/0x6b0 [ 1614.734989] #4: (rcu_read_lock){.+.+..}, at: [<ffffffff815da240>] ip_queue_xmit+0x0/0x680 [ 1614.734997] #5: (rcu_read_lock_bh){.+....}, at: [<ffffffff815d9925>] ip_finish_output+0x135/0x890 [ 1614.735004] #6: (rcu_read_lock_bh){.+....}, at: [<ffffffff81595680>] dev_queue_xmit+0x0/0xe00 [ 1614.735012] [ 1614.735012] stack backtrace: [ 1614.735016] Pid: 0, comm: swapper/11 Not tainted 3.6.0-rc3+ #782 [ 1614.735018] Call Trace: [ 1614.735020] <IRQ> [<ffffffff810a50ac>] __lock_acquire+0x144c/0x1b10 [ 1614.735033] [<ffffffff810a334b>] ? check_usage+0x9b/0x4d0 [ 1614.735037] [<ffffffff810a6762>] ? mark_held_locks+0x82/0x130 [ 1614.735042] [<ffffffff810a5df0>] lock_acquire+0x90/0x200 [ 1614.735047] [<ffffffffa0209d72>] ? l2tp_xmit_skb+0x172/0xa50 [l2tp_core] [ 1614.735051] [<ffffffff810a69ad>] ? trace_hardirqs_on+0xd/0x10 [ 1614.735060] [<ffffffff81749b31>] _raw_spin_lock+0x41/0x50 [ 1614.735065] [<ffffffffa0209d72>] ? l2tp_xmit_skb+0x172/0xa50 [l2tp_core] [ 1614.735069] [<ffffffffa0209d72>] l2tp_xmit_skb+0x172/0xa50 [l2tp_core] [ 1614.735075] [<ffffffffa014f7f2>] l2tp_eth_dev_xmit+0x32/0x60 [l2tp_eth] [ 1614.735079] [<ffffffff81595112>] dev_hard_start_xmit+0x502/0xa70 [ 1614.735083] [<ffffffff81594c6e>] ? dev_hard_start_xmit+0x5e/0xa70 [ 1614.735087] [<ffffffff815957c1>] ? dev_queue_xmit+0x141/0xe00 [ 1614.735093] [<ffffffff815b622e>] sch_direct_xmit+0xfe/0x290 [ 1614.735098] [<ffffffff81595865>] dev_queue_xmit+0x1e5/0xe00 [ 1614.735102] [<ffffffff81595680>] ? dev_hard_start_xmit+0xa70/0xa70 [ 1614.735106] [<ffffffff815b4daa>] ? eth_header+0x3a/0xf0 [ 1614.735111] [<ffffffff8161d33e>] ? fib_get_table+0x2e/0x280 [ 1614.735117] [<ffffffff8160a7e2>] arp_xmit+0x22/0x60 [ 1614.735121] [<ffffffff8160a863>] arp_send+0x43/0x50 [ 1614.735125] [<ffffffff8160b82f>] arp_solicit+0x18f/0x450 [ 1614.735132] [<ffffffff8159d9da>] neigh_probe+0x4a/0x70 [ 1614.735137] [<ffffffff815a191a>] __neigh_event_send+0xea/0x300 [ 1614.735141] [<ffffffff815a1c93>] neigh_resolve_output+0x163/0x260 [ 1614.735146] [<ffffffff815d9cf5>] ip_finish_output+0x505/0x890 [ 1614.735150] [<ffffffff815d9925>] ? ip_finish_output+0x135/0x890 [ 1614.735154] [<ffffffff815dae79>] ip_output+0x59/0xf0 [ 1614.735158] [<ffffffff815da1cd>] ip_local_out+0x2d/0xa0 [ 1614.735162] [<ffffffff815da403>] ip_queue_xmit+0x1c3/0x680 [ 1614.735165] [<ffffffff815da240>] ? ip_local_out+0xa0/0xa0 [ 1614.735172] [<ffffffff815f4402>] tcp_transmit_skb+0x402/0xa60 [ 1614.735177] [<ffffffff815f5a11>] tcp_retransmit_skb+0x1a1/0x620 [ 1614.735181] [<ffffffff815f7e93>] tcp_retransmit_timer+0x393/0x960 [ 1614.735185] [<ffffffff815fce23>] ? tcp_v4_err+0x163/0x6b0 [ 1614.735189] [<ffffffff815fd317>] tcp_v4_err+0x657/0x6b0 [ 1614.735194] [<ffffffff8160d116>] ? icmp_socket_deliver+0x46/0x230 [ 1614.735199] [<ffffffff8160d19e>] icmp_socket_deliver+0xce/0x230 [ 1614.735203] [<ffffffff8160d116>] ? icmp_socket_deliver+0x46/0x230 [ 1614.735208] [<ffffffff8160d464>] icmp_unreach+0xe4/0x2c0 [ 1614.735213] [<ffffffff8160e520>] icmp_rcv+0x350/0x4a0 [ 1614.735217] [<ffffffff815d3285>] ip_local_deliver_finish+0x135/0x4e0 [ 1614.735221] [<ffffffff815d319c>] ? ip_local_deliver_finish+0x4c/0x4e0 [ 1614.735225] [<ffffffff815d3ffa>] ip_local_deliver+0x4a/0x90 [ 1614.735229] [<ffffffff815d37b7>] ip_rcv_finish+0x187/0x730 [ 1614.735233] [<ffffffff815d425d>] ip_rcv+0x21d/0x300 [ 1614.735237] [<ffffffff81592a1b>] __netif_receive_skb+0x46b/0xd00 [ 1614.735241] [<ffffffff81592801>] ? __netif_receive_skb+0x251/0xd00 [ 1614.735245] [<ffffffff81593368>] process_backlog+0xb8/0x180 [ 1614.735249] [<ffffffff81593cf9>] net_rx_action+0x159/0x330 [ 1614.735257] [<ffffffff810491f0>] __do_softirq+0xd0/0x3e0 [ 1614.735264] [<ffffffff8109ed24>] ? tick_program_event+0x24/0x30 [ 1614.735270] [<ffffffff8175419c>] call_softirq+0x1c/0x30 [ 1614.735278] [<ffffffff8100425d>] do_softirq+0x8d/0xc0 [ 1614.735282] [<ffffffff8104983e>] irq_exit+0xae/0xe0 [ 1614.735287] [<ffffffff8175494e>] smp_apic_timer_interrupt+0x6e/0x99 [ 1614.735291] [<ffffffff81753a1c>] apic_timer_interrupt+0x6c/0x80 [ 1614.735293] <EOI> [<ffffffff810a14ad>] ? trace_hardirqs_off+0xd/0x10 [ 1614.735306] [<ffffffff81336f85>] ? intel_idle+0xf5/0x150 [ 1614.735310] [<ffffffff81336f7e>] ? intel_idle+0xee/0x150 [ 1614.735317] [<ffffffff814e6ea9>] cpuidle_enter+0x19/0x20 [ 1614.735321] [<ffffffff814e7538>] cpuidle_idle_call+0xa8/0x630 [ 1614.735327] [<ffffffff8100c1ba>] cpu_idle+0x8a/0xe0 [ 1614.735333] [<ffffffff8173762e>] start_secondary+0x220/0x222 Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-04netrom: copy_datagram_iovec can failAlan Cox
Check for an error from this and if so bail properly. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-04nl80211: fix possible memory leak nl80211_connect()Wei Yongjun
connkeys is malloced in nl80211_parse_connkeys() and should be freed in the error handling case, otherwise it will cause memory leak. spatch with a semantic match is used to found this problem. (http://coccinelle.lip6.fr/) Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-04mac80211: clear bssid on auth/assoc failureEliad Peller
ifmgd->bssid wasn't cleared properly in some auth/assoc failure cases, causing mac80211 and the low-level driver to go out of sync. Clear ifmgd->bssid on failure, and notify the driver. Cc: stable@kernel.org # 3.4+ Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-03openvswitch: Fix FLOW_BUFSIZE definition.Jesse Gross
The vlan encapsulation fields in the maximum flow defintion were never updated when the representation changed before upstreaming. In theory this could cause a kernel panic when a maximum length flow is used. In practice this has never happened (to my knowledge) because skb allocations are padded out to a cache line so you would need the right combination of flow and packet being sent to userspace. Signed-off-by: Jesse Gross <jesse@nicira.com>
2012-09-03fq_codel: dont reinit flow stateEric Dumazet
When fq_codel builds a new flow, it should not reset codel state. Codel algo needs to get previous values (lastcount, drop_next) to get proper behavior. Signed-off-by: Dave Taht <dave.taht@gmail.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Dave Taht <dave.taht@bufferbloat.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-03sctp: Don't charge for data in sndbuf again when transmitting packetThomas Graf
SCTP charges wmem_alloc via sctp_set_owner_w() in sctp_sendmsg() and via skb_set_owner_w() in sctp_packet_transmit(). If a sender runs out of sndbuf it will sleep in sctp_wait_for_sndbuf() and expects to be waken up by __sctp_write_space(). Buffer space charged via sctp_set_owner_w() is released in sctp_wfree() which calls __sctp_write_space() directly. Buffer space charged via skb_set_owner_w() is released via sock_wfree() which calls sk->sk_write_space() _if_ SOCK_USE_WRITE_QUEUE is not set. sctp_endpoint_init() sets SOCK_USE_WRITE_QUEUE on all sockets. Therefore if sctp_packet_transmit() manages to queue up more than sndbuf bytes, sctp_wait_for_sndbuf() will never be woken up again unless it is interrupted by a signal. This could be fixed by clearing the SOCK_USE_WRITE_QUEUE flag but ... Charging for the data twice does not make sense in the first place, it leads to overcharging sndbuf by a factor 2. Therefore this patch only charges a single byte in wmem_alloc when transmitting an SCTP packet to ensure that the socket stays alive until the packet has been released. This means that control chunks are no longer accounted for in wmem_alloc which I believe is not a problem as skb->truesize will typically lead to overcharging anyway and thus compensates for any control overhead. Signed-off-by: Thomas Graf <tgraf@suug.ch> CC: Vlad Yasevich <vyasevic@redhat.com> CC: Neil Horman <nhorman@tuxdriver.com> CC: David Miller <davem@davemloft.net> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-03net: sock_edemux() should take care of timewait socketsEric Dumazet
sock_edemux() can handle either a regular socket or a timewait socket Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-09-02openvswitch: Fix typoJoe Stringer
Signed-off-by: Joe Stringer <joe@wand.net.nz> Signed-off-by: Jesse Gross <jesse@nicira.com>
2012-09-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) NLA_PUT* --> nla_put_* conversion got one case wrong in nfnetlink_log, fix from Patrick McHardy. 2) Missed error return check in ipw2100 driver, from Julia Lawall. 3) PMTU updates in ipv4 were setting the expiry time incorrectly, fix from Eric Dumazet. 4) SFC driver erroneously reversed src and dst when reporting filters via ethtool. 5) Memory leak in CAN protocol and wrong setting of IRQF_SHARED in sja1000 can platform driver, from Alexey Khoroshilov and Sven Schmitt. 6) Fix multicast traffic scaling regression in ipv4_dst_destroy, only take the lock when we really need to. From Eric Dumazet. 7) Fix non-root process spoofing in netlink, from Pablo Neira Ayuso. 8) CWND reduction in TCP is done incorrectly during non-SACK recovery, fix from Yuchung Cheng. 9) Revert netpoll change, and fix what was actually a driver specific problem. From Amerigo Wang. This should cure bootup hangs with netconsole some people reported. 10) Fix xen-netfront invoking __skb_fill_page_desc() with a NULL page pointer. From Ian Campbell. 11) SIP NAT fix for expectiontation creation, from Pablo Neira Ayuso. 12) __ip_rt_update_pmtu() needs RCU locking, from Eric Dumazet. 13) Fix usbnet deadlock on resume, can't use GFP_KERNEL in this situation. From Oliver Neukum. 14) The davinci ethernet driver triggers an OOPS on removal because it frees an MDIO object before unregistering it. Fix from Bin Liu. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (41 commits) net: qmi_wwan: add several new Gobi devices fddi: 64 bit bug in smt_add_para() net: ethernet: fix kernel OOPS when remove davinci_mdio module net/xfrm/xfrm_state.c: fix error return code net: ipv6: fix error return code net: qmi_wwan: new device: Foxconn/Novatel E396 usbnet: fix deadlock in resume cs89x0 : packet reception not working netfilter: nf_conntrack: fix racy timer handling with reliable events bnx2x: Correct the ndo_poll_controller call bnx2x: Move netif_napi_add to the open call ipv4: must use rcu protection while calling fib_lookup bnx2x: fix 57840_MF pci id net: ipv4: ipmr_expire_timer causes crash when removing net namespace e1000e: DoS while TSO enabled caused by link partner with small MSS l2tp: avoid to use synchronize_rcu in tunnel free function gianfar: fix default tx vlan offload feature flag netfilter: nf_nat_sip: fix incorrect handling of EBUSY for RTCP expectation xen-netfront: use __pskb_pull_tail to ensure linear area is big enough on RX netfilter: nfnetlink_log: fix error return code in init path ...
2012-08-31net/xfrm/xfrm_state.c: fix error return codeJulia Lawall
Initialize return variable before exiting on an error path. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-08-31net: ipv6: fix error return codeJulia Lawall
Initialize return variable before exiting on an error path. The initial initialization of the return variable is also dropped, because that value is never used. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-08-31Merge branch 'master' of git://1984.lsi.us.es/nfDavid S. Miller
2012-08-31netfilter: nf_conntrack: fix racy timer handling with reliable eventsPablo Neira Ayuso
Existing code assumes that del_timer returns true for alive conntrack entries. However, this is not true if reliable events are enabled. In that case, del_timer may return true for entries that were just inserted in the dying list. Note that packets / ctnetlink may hold references to conntrack entries that were just inserted to such list. This patch fixes the issue by adding an independent timer for event delivery. This increases the size of the ecache extension. Still we can revisit this later and use variable size extensions to allocate this area on demand. Tested-by: Oliver Smith <olipro@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-08-30ipv4: must use rcu protection while calling fib_lookupEric Dumazet
Following lockdep splat was reported by Pavel Roskin : [ 1570.586223] =============================== [ 1570.586225] [ INFO: suspicious RCU usage. ] [ 1570.586228] 3.6.0-rc3-wl-main #98 Not tainted [ 1570.586229] ------------------------------- [ 1570.586231] /home/proski/src/linux/net/ipv4/route.c:645 suspicious rcu_dereference_check() usage! [ 1570.586233] [ 1570.586233] other info that might help us debug this: [ 1570.586233] [ 1570.586236] [ 1570.586236] rcu_scheduler_active = 1, debug_locks = 0 [ 1570.586238] 2 locks held by Chrome_IOThread/4467: [ 1570.586240] #0: (slock-AF_INET){+.-...}, at: [<ffffffff814f2c0c>] release_sock+0x2c/0xa0 [ 1570.586253] #1: (fnhe_lock){+.-...}, at: [<ffffffff815302fc>] update_or_create_fnhe+0x2c/0x270 [ 1570.586260] [ 1570.586260] stack backtrace: [ 1570.586263] Pid: 4467, comm: Chrome_IOThread Not tainted 3.6.0-rc3-wl-main #98 [ 1570.586265] Call Trace: [ 1570.586271] [<ffffffff810976ed>] lockdep_rcu_suspicious+0xfd/0x130 [ 1570.586275] [<ffffffff8153042c>] update_or_create_fnhe+0x15c/0x270 [ 1570.586278] [<ffffffff815305b3>] __ip_rt_update_pmtu+0x73/0xb0 [ 1570.586282] [<ffffffff81530619>] ip_rt_update_pmtu+0x29/0x90 [ 1570.586285] [<ffffffff815411dc>] inet_csk_update_pmtu+0x2c/0x80 [ 1570.586290] [<ffffffff81558d1e>] tcp_v4_mtu_reduced+0x2e/0xc0 [ 1570.586293] [<ffffffff81553bc4>] tcp_release_cb+0xa4/0xb0 [ 1570.586296] [<ffffffff814f2c35>] release_sock+0x55/0xa0 [ 1570.586300] [<ffffffff815442ef>] tcp_sendmsg+0x4af/0xf50 [ 1570.586305] [<ffffffff8156fc60>] inet_sendmsg+0x120/0x230 [ 1570.586308] [<ffffffff8156fb40>] ? inet_sk_rebuild_header+0x40/0x40 [ 1570.586312] [<ffffffff814f4bdd>] ? sock_update_classid+0xbd/0x3b0 [ 1570.586315] [<ffffffff814f4c50>] ? sock_update_classid+0x130/0x3b0 [ 1570.586320] [<ffffffff814ec435>] do_sock_write+0xc5/0xe0 [ 1570.586323] [<ffffffff814ec4a3>] sock_aio_write+0x53/0x80 [ 1570.586328] [<ffffffff8114bc83>] do_sync_write+0xa3/0xe0 [ 1570.586332] [<ffffffff8114c5a5>] vfs_write+0x165/0x180 [ 1570.586335] [<ffffffff8114c805>] sys_write+0x45/0x90 [ 1570.586340] [<ffffffff815d2722>] system_call_fastpath+0x16/0x1b Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Pavel Roskin <proski@gnu.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-08-30net: ipv4: ipmr_expire_timer causes crash when removing net namespaceFrancesco Ruggeri
When tearing down a net namespace, ipv4 mr_table structures are freed without first deactivating their timers. This can result in a crash in run_timer_softirq. This patch mimics the corresponding behaviour in ipv6. Locking and synchronization seem to be adequate. We are about to kfree mrt, so existing code should already make sure that no other references to mrt are pending or can be created by incoming traffic. The functions invoked here do not cause new references to mrt or other race conditions to be created. Invoking del_timer_sync guarantees that ipmr_expire_timer is inactive. Both ipmr_expire_process (whose completion we may have to wait in del_timer_sync) and mroute_clean_tables internally use mfc_unres_lock or other synchronizations when needed, and they both only modify mrt. Tested in Linux 3.4.8. Signed-off-by: Francesco Ruggeri <fruggeri@aristanetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-08-30l2tp: avoid to use synchronize_rcu in tunnel free functionxeb@mail.ru
Avoid to use synchronize_rcu in l2tp_tunnel_free because context may be atomic. Signed-off-by: Dmitry Kozlov <xeb@mail.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-08-30netfilter: nf_nat_sip: fix incorrect handling of EBUSY for RTCP expectationPablo Neira Ayuso
We're hitting bug while trying to reinsert an already existing expectation: kernel BUG at kernel/timer.c:895! invalid opcode: 0000 [#1] SMP [...] Call Trace: <IRQ> [<ffffffffa0069563>] nf_ct_expect_related_report+0x4a0/0x57a [nf_conntrack] [<ffffffff812d423a>] ? in4_pton+0x72/0x131 [<ffffffffa00ca69e>] ip_nat_sdp_media+0xeb/0x185 [nf_nat_sip] [<ffffffffa00b5b9b>] set_expected_rtp_rtcp+0x32d/0x39b [nf_conntrack_sip] [<ffffffffa00b5f15>] process_sdp+0x30c/0x3ec [nf_conntrack_sip] [<ffffffff8103f1eb>] ? irq_exit+0x9a/0x9c [<ffffffffa00ca738>] ? ip_nat_sdp_media+0x185/0x185 [nf_nat_sip] We have to remove the RTP expectation if the RTCP expectation hits EBUSY since we keep trying with other ports until we succeed. Reported-by: Rafal Fitt <rafalf@aplusc.com.pl> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-08-30netfilter: nfnetlink_log: fix error return code in init pathJulia Lawall
Initialize return variable before exiting on an error path. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-08-30netfilter: ctnetlink: fix error return code in init pathJulia Lawall
Initialize return variable before exiting on an error path. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-08-30ipvs: fix error return codeJulia Lawall
Initialize return variable before exiting on an error path. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Simon Horman <horms@verge.net.au> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-08-29netpoll: revert 6bdb7fe3104 and fix be_poll() insteadAmerigo Wang
Against -net. In the patch "netpoll: re-enable irq in poll_napi()", I tried to fix the following warning: [100718.051041] ------------[ cut here ]------------ [100718.051048] WARNING: at kernel/softirq.c:159 local_bh_enable_ip+0x7d/0xb0() (Not tainted) [100718.051049] Hardware name: ProLiant BL460c G7 ... [100718.051068] Call Trace: [100718.051073] [<ffffffff8106b747>] ? warn_slowpath_common+0x87/0xc0 [100718.051075] [<ffffffff8106b79a>] ? warn_slowpath_null+0x1a/0x20 [100718.051077] [<ffffffff810747ed>] ? local_bh_enable_ip+0x7d/0xb0 [100718.051080] [<ffffffff8150041b>] ? _spin_unlock_bh+0x1b/0x20 [100718.051085] [<ffffffffa00ee974>] ? be_process_mcc+0x74/0x230 [be2net] [100718.051088] [<ffffffffa00ea68c>] ? be_poll_tx_mcc+0x16c/0x290 [be2net] [100718.051090] [<ffffffff8144fe76>] ? netpoll_poll_dev+0xd6/0x490 [100718.051095] [<ffffffffa01d24a5>] ? bond_poll_controller+0x75/0x80 [bonding] [100718.051097] [<ffffffff8144fde5>] ? netpoll_poll_dev+0x45/0x490 [100718.051100] [<ffffffff81161b19>] ? ksize+0x19/0x80 [100718.051102] [<ffffffff81450437>] ? netpoll_send_skb_on_dev+0x157/0x240 by reenabling IRQ before calling ->poll, but it seems more problems are introduced after that patch: http://ozlabs.org/~akpm/stuff/IMG_20120824_122054.jpg http://marc.info/?l=linux-netdev&m=134563282530588&w=2 So it is safe to fix be2net driver code directly. This patch reverts the offending commit and fixes be_poll() by avoid disabling BH there, this is okay because be_poll() can be called either by poll_napi() which already disables IRQ, or by net_rx_action() which already disables BH. Reported-by: Andrew Morton <akpm@linux-foundation.org> Reported-by: Sylvain Munaut <s.munaut@whatever-company.com> Cc: Sylvain Munaut <s.munaut@whatever-company.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Miller <davem@davemloft.net> Cc: Sathya Perla <sathya.perla@emulex.com> Cc: Subbu Seetharaman <subbu.seetharaman@emulex.com> Cc: Ajit Khaparde <ajit.khaparde@emulex.com> Signed-off-by: Cong Wang <amwang@redhat.com> Tested-by: Sylvain Munaut <s.munaut@whatever-company.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-08-27Bluetooth: Fix sending a HCI Authorization Request over LE linksVinicius Costa Gomes
In the case that the link is already in the connected state and a Pairing request arrives from the mgmt interface, hci_conn_security() would be called but it was not considering LE links. Reported-by: João Paulo Rechi Vita <jprvita@openbossa.org> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>