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2013-07-09net: rename low latency sockets functions to busy pollEliezer Tamir3-10/+11
Rename functions in include/net/ll_poll.h to busy wait. Clarify documentation about expected power use increase. Rename POLL_LL to POLL_BUSY_LOOP. Add need_resched() testing to poll/select busy loops. Note, that in select and poll can_busy_poll is dynamic and is updated continuously to reflect the existence of supported sockets with valid queue information. Signed-off-by: Eliezer Tamir <eliezer.tamir@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-07bridge: fix some kernel warning in multicast timerCong Wang2-2/+2
Several people reported the warning: "kernel BUG at kernel/timer.c:729!" and the stack trace is: #7 [ffff880214d25c10] mod_timer+501 at ffffffff8106d905 #8 [ffff880214d25c50] br_multicast_del_pg.isra.20+261 at ffffffffa0731d25 [bridge] #9 [ffff880214d25c80] br_multicast_disable_port+88 at ffffffffa0732948 [bridge] #10 [ffff880214d25cb0] br_stp_disable_port+154 at ffffffffa072bcca [bridge] #11 [ffff880214d25ce8] br_device_event+520 at ffffffffa072a4e8 [bridge] #12 [ffff880214d25d18] notifier_call_chain+76 at ffffffff8164aafc #13 [ffff880214d25d50] raw_notifier_call_chain+22 at ffffffff810858f6 #14 [ffff880214d25d60] call_netdevice_notifiers+45 at ffffffff81536aad #15 [ffff880214d25d80] dev_close_many+183 at ffffffff81536d17 #16 [ffff880214d25dc0] rollback_registered_many+168 at ffffffff81537f68 #17 [ffff880214d25de8] rollback_registered+49 at ffffffff81538101 #18 [ffff880214d25e10] unregister_netdevice_queue+72 at ffffffff815390d8 #19 [ffff880214d25e30] __tun_detach+272 at ffffffffa074c2f0 [tun] #20 [ffff880214d25e88] tun_chr_close+45 at ffffffffa074c4bd [tun] #21 [ffff880214d25ea8] __fput+225 at ffffffff8119b1f1 #22 [ffff880214d25ef0] ____fput+14 at ffffffff8119b3fe #23 [ffff880214d25f00] task_work_run+159 at ffffffff8107cf7f #24 [ffff880214d25f30] do_notify_resume+97 at ffffffff810139e1 #25 [ffff880214d25f50] int_signal+18 at ffffffff8164f292 this is due to I forgot to check if mp->timer is armed in br_multicast_del_pg(). This bug is introduced by commit 9f00b2e7cf241fa389733d41b6 (bridge: only expire the mdb entry when query is received). Same for __br_mdb_del(). Tested-by: poma <pomidorabelisima@gmail.com> Reported-by: LiYonghua <809674045@qq.com> Reported-by: Robert Hancock <hancockrwd@gmail.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Stephen Hemminger <stephen@networkplumber.org> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-05sit: fix tunnel update via netlinkNicolas Dichtel1-2/+2
The device can stand in another netns, hence we need to do the lookup in netns tunnel->net. Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-04ipv6: rt6_check_neigh should successfully verify neigh if no NUD information ↵Hannes Frederic Sowa1-0/+2
are available After the removal of rt->n we do not create a neighbour entry at route insertion time (rt6_bind_neighbour is gone). As long as no neighbour is created because of "useful traffic" we skip this routing entry because rt6_check_neigh cannot pick up a valid neighbour (neigh == NULL) and thus returns false. This change was introduced by commit 887c95cc1da53f66a5890fdeab13414613010097 ("ipv6: Complete neighbour entry removal from dst_entry.") To quote RFC4191: "If the host has no information about the router's reachability, then the host assumes the router is reachable." and also: "A host MUST NOT probe a router's reachability in the absence of useful traffic that the host would have sent to the router if it were reachable." So, just assume the router is reachable and let's rt6_probe do the rest. We don't need to create a neighbour on route insertion time. If we don't compile with CONFIG_IPV6_ROUTER_PREF (RFC4191 support) a neighbour is only valid if its nud_state is NUD_VALID. I did not find any references that we should probe the router on route insertion time via the other RFCs. So skip this route in that case. v2: a) use IS_ENABLED instead of #ifdefs (thanks to Sergei Shtylyov) Reported-by: Pierre Emeriaud <petrus.lt@gmail.com> Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-04net: ipv6: fix wrong ping_v6_sendmsg return valueLorenzo Colitti1-1/+4
ping_v6_sendmsg currently returns 0 on success. It should return the number of bytes written instead. Signed-off-by: Lorenzo Colitti <lorenzo@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-04net: ipv6: add missing lock in ping_v6_sendmsgLorenzo Colitti1-0/+2
Signed-off-by: Lorenzo Colitti <lorenzo@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-04netem: fix possible NULL deref in netem_dequeue()Eric Dumazet1-3/+5
commit aec0a40a6f7884 ("netem: use rb tree to implement the time queue") added a regression if a child qdisc is attached to netem, as we perform a NULL dereference. Fix this by adding a temporary variable to cache netem_skb_cb(skb)->time_to_send. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-04core: Copy inner_protocol in copy_skb_header()Joe Stringer1-0/+1
inner_protocol was added to struct sk_buff in 0d89d2035fe063461a5ddb609b2c12e7fb006e44 ("MPLS: Add limited GSO support"), which is scheduled to be included in v3.11. That patch did not update __copy_skb_header to copy the inner_protocol. Signed-off-by: Joe Stringer <joe@wand.net.nz> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller15-58/+88
Conflicts: drivers/net/ethernet/freescale/fec_main.c drivers/net/ethernet/renesas/sh_eth.c net/ipv4/gre.c The GRE conflict is between a bug fix (kfree_skb --> kfree_skb_list) and the splitting of the gre.c code into seperate files. The FEC conflict was two sets of changes adding ethtool support code in an "!CONFIG_M5272" CPP protected block. Finally the sh_eth.c conflict was between one commit add bits set in the .eesr_err_check mask whilst another commit removed the .tx_error_check member and assignments. Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-04net: gre: move GSO functions to gre_offloadDaniel Borkmann3-103/+131
Similarly to TCP/UDP offloading, move all related GRE functions to gre_offload.c to make things more explicit and similar to the rest of the code. Suggested-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-03ip_tunnels: Use skb-len to PMTU check.Pravin B Shelar1-44/+55
In path mtu check, ip header total length works for gre device but not for gre-tap device. Use skb len which is consistent for all tunneling types. This is old bug in gre. This also fixes mtu calculation bug introduced by commit c54419321455631079c7d (GRE: Refactor GRE tunneling code). Reported-by: Timo Teras <timo.teras@iki.fi> Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-03l2tp: make datapath resilient to packet loss when sequence numbers enabledJames Chapman2-5/+34
If L2TP data sequence numbers are enabled and reordering is not enabled, data reception stops if a packet is lost since the kernel waits for a sequence number that is never resent. (When reordering is enabled, data reception restarts when the reorder timeout expires.) If no reorder timeout is set, we should count the number of in-sequence packets after the out-of-sequence (OOS) condition is detected, and reset sequence number state after a number of such packets are received. For now, the number of in-sequence packets while in OOS state which cause the sequence number state to be reset is hard-coded to 5. This could be configurable later. Signed-off-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-03l2tp: make datapath sequence number support RFC-compliantJames Chapman2-5/+33
The L2TP datapath is not currently RFC-compliant when sequence numbers are used in L2TP data packets. According to the L2TP RFC, any received sequence number NR greater than or equal to the next expected NR is acceptable, where the "greater than or equal to" test is determined by the NR wrap point. This differs for L2TPv2 and L2TPv3, so add state in the session context to hold the max NR value and the NR window size in order to do the acceptable sequence number value check. These might be configurable later, but for now we derive it from the tunnel L2TP version, which determines the sequence number field size. Signed-off-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-03l2tp: do data sequence number handling in a separate funcJames Chapman1-20/+34
This change moves some code handling data sequence numbers into a separate function to avoid too much indentation. This is to prepare for some changes to data sequence number handling in subsequent patches. Signed-off-by: James Chapman <jchapman@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-03sctp: use get_unused_fd_flags(0) instead of get_unused_fd()Yann Droneaud1-1/+1
Macro get_unused_fd() is used to allocate a file descriptor with default flags. Those default flags (0) can be "unsafe": O_CLOEXEC must be used by default to not leak file descriptor across exec(). Instead of macro get_unused_fd(), functions anon_inode_getfd() or get_unused_fd_flags() should be used with flags given by userspace. If not possible, flags should be set to O_CLOEXEC to provide userspace with a default safe behavor. In a further patch, get_unused_fd() will be removed so that new code start using anon_inode_getfd() or get_unused_fd_flags() with correct flags. This patch replaces calls to get_unused_fd() with equivalent call to get_unused_fd_flags(0) to preserve current behavor for existing code. The hard coded flag value (0) should be reviewed on a per-subsystem basis, and, if possible, set to O_CLOEXEC. Signed-off-by: Yann Droneaud <ydroneaud@opteya.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-03core/dev: set pkt_type after eth_type_trans() in dev_forward_skb()Isaku Yamahata1-0/+6
The dev_forward_skb() assignment of pkt_type should be done after the call to eth_type_trans(). ip-encapsulated packets can be handled by localhost. But skb->pkt_type can be PACKET_OTHERHOST when packet comes via veth into ip tunnel device. In that case, the packet is dropped by ip_rcv(). Although this example uses gretap. l2tp-eth also has same issue. For l2tp-eth case, add dummy device for ip address and ip l2tp command. netns A | root netns | netns B veth<->veth=bridge=gretap <-loop back-> gretap=bridge=veth<->veth arp packet -> pkt_type BROADCAST------------>ip_rcv()------------------------> <- arp reply pkt_type ip_rcv()<-----------------OTHERHOST drop sample operations ip link add tapa type gretap remote 172.17.107.4 local 172.17.107.3 ip link add tapb type gretap remote 172.17.107.3 local 172.17.107.4 ip link set tapa up ip link set tapb up ip address add 172.17.107.3 dev tapa ip address add 172.17.107.4 dev tapb ip route get 172.17.107.3 > local 172.17.107.3 dev lo src 172.17.107.3 > cache <local> ip route get 172.17.107.4 > local 172.17.107.4 dev lo src 172.17.107.4 > cache <local> ip link add vetha type veth peer name vetha-peer ip link add vethb type veth peer name vethb-peer brctl addbr bra brctl addbr brb brctl addif bra tapa brctl addif bra vetha-peer brctl addif brb tapb brctl addif brb vethb-peer brctl show > bridge name bridge id STP enabled interfaces > bra 8000.6ea21e758ff1 no tapa > vetha-peer > brb 8000.420020eb92d5 no tapb > vethb-peer ip link set vetha-peer up ip link set vethb-peer up ip link set bra up ip link set brb up ip netns add a ip netns add b ip link set vetha netns a ip link set vethb netns b ip netns exec a ip address add 10.0.0.3/24 dev vetha ip netns exec b ip address add 10.0.0.4/24 dev vethb ip netns exec a ip link set vetha up ip netns exec b ip link set vethb up ip netns exec a arping -I vetha 10.0.0.4 ARPING 10.0.0.4 from 10.0.0.3 vetha ^CSent 2 probes (2 broadcast(s)) Received 0 response(s) Cc: Jason Wang <jasowang@redhat.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Patrick McHardy <kaber@trash.net> Cc: Hong Zhiguo <honkiko@gmail.com> Cc: Rami Rosen <ramirose@gmail.com> Cc: Tom Parkin <tparkin@katalix.com> Cc: Cong Wang <xiyou.wangcong@gmail.com> Cc: Pravin B Shelar <pshelar@nicira.com> Cc: Jesse Gross <jesse@nicira.com> Cc: dev@openvswitch.org Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02ipv6: ip6_append_data_mtu did not care about pmtudisc and frag_sizeHannes Frederic Sowa1-6/+10
If the socket had an IPV6_MTU value set, ip6_append_data_mtu lost track of this when appending the second frame on a corked socket. This results in the following splat: [37598.993962] ------------[ cut here ]------------ [37598.994008] kernel BUG at net/core/skbuff.c:2064! [37598.994008] invalid opcode: 0000 [#1] SMP [37598.994008] Modules linked in: tcp_lp uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev media vfat fat usb_storage fuse ebtable_nat xt_CHECKSUM bridge stp llc ipt_MASQUERADE nf_conntrack_netbios_ns nf_conntrack_broadcast ip6table_mangle ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 iptable_nat +nf_nat_ipv4 nf_nat iptable_mangle nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ebtable_filter ebtables ip6table_filter ip6_tables be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb4i cxgb4 cxgb3i cxgb3 mdio libcxgbi ib_iser rdma_cm ib_addr iw_cm ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi +scsi_transport_iscsi rfcomm bnep iTCO_wdt iTCO_vendor_support snd_hda_codec_conexant arc4 iwldvm mac80211 snd_hda_intel acpi_cpufreq mperf coretemp snd_hda_codec microcode cdc_wdm cdc_acm [37598.994008] snd_hwdep cdc_ether snd_seq snd_seq_device usbnet mii joydev btusb snd_pcm bluetooth i2c_i801 e1000e lpc_ich mfd_core ptp iwlwifi pps_core snd_page_alloc mei cfg80211 snd_timer thinkpad_acpi snd tpm_tis soundcore rfkill tpm tpm_bios vhost_net tun macvtap macvlan kvm_intel kvm uinput binfmt_misc +dm_crypt i915 i2c_algo_bit drm_kms_helper drm i2c_core wmi video [37598.994008] CPU 0 [37598.994008] Pid: 27320, comm: t2 Not tainted 3.9.6-200.fc18.x86_64 #1 LENOVO 27744PG/27744PG [37598.994008] RIP: 0010:[<ffffffff815443a5>] [<ffffffff815443a5>] skb_copy_and_csum_bits+0x325/0x330 [37598.994008] RSP: 0018:ffff88003670da18 EFLAGS: 00010202 [37598.994008] RAX: ffff88018105c018 RBX: 0000000000000004 RCX: 00000000000006c0 [37598.994008] RDX: ffff88018105a6c0 RSI: ffff88018105a000 RDI: ffff8801e1b0aa00 [37598.994008] RBP: ffff88003670da78 R08: 0000000000000000 R09: ffff88018105c040 [37598.994008] R10: ffff8801e1b0aa00 R11: 0000000000000000 R12: 000000000000fff8 [37598.994008] R13: 00000000000004fc R14: 00000000ffff0504 R15: 0000000000000000 [37598.994008] FS: 00007f28eea59740(0000) GS:ffff88023bc00000(0000) knlGS:0000000000000000 [37598.994008] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [37598.994008] CR2: 0000003d935789e0 CR3: 00000000365cb000 CR4: 00000000000407f0 [37598.994008] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [37598.994008] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [37598.994008] Process t2 (pid: 27320, threadinfo ffff88003670c000, task ffff88022c162ee0) [37598.994008] Stack: [37598.994008] ffff88022e098a00 ffff88020f973fc0 0000000000000008 00000000000004c8 [37598.994008] ffff88020f973fc0 00000000000004c4 ffff88003670da78 ffff8801e1b0a200 [37598.994008] 0000000000000018 00000000000004c8 ffff88020f973fc0 00000000000004c4 [37598.994008] Call Trace: [37598.994008] [<ffffffff815fc21f>] ip6_append_data+0xccf/0xfe0 [37598.994008] [<ffffffff8158d9f0>] ? ip_copy_metadata+0x1a0/0x1a0 [37598.994008] [<ffffffff81661f66>] ? _raw_spin_lock_bh+0x16/0x40 [37598.994008] [<ffffffff8161548d>] udpv6_sendmsg+0x1ed/0xc10 [37598.994008] [<ffffffff812a2845>] ? sock_has_perm+0x75/0x90 [37598.994008] [<ffffffff815c3693>] inet_sendmsg+0x63/0xb0 [37598.994008] [<ffffffff812a2973>] ? selinux_socket_sendmsg+0x23/0x30 [37598.994008] [<ffffffff8153a450>] sock_sendmsg+0xb0/0xe0 [37598.994008] [<ffffffff810135d1>] ? __switch_to+0x181/0x4a0 [37598.994008] [<ffffffff8153d97d>] sys_sendto+0x12d/0x180 [37598.994008] [<ffffffff810dfb64>] ? __audit_syscall_entry+0x94/0xf0 [37598.994008] [<ffffffff81020ed1>] ? syscall_trace_enter+0x231/0x240 [37598.994008] [<ffffffff8166a7e7>] tracesys+0xdd/0xe2 [37598.994008] Code: fe 07 00 00 48 c7 c7 04 28 a6 81 89 45 a0 4c 89 4d b8 44 89 5d a8 e8 1b ac b1 ff 44 8b 5d a8 4c 8b 4d b8 8b 45 a0 e9 cf fe ff ff <0f> 0b 66 0f 1f 84 00 00 00 00 00 66 66 66 66 90 55 48 89 e5 48 [37598.994008] RIP [<ffffffff815443a5>] skb_copy_and_csum_bits+0x325/0x330 [37598.994008] RSP <ffff88003670da18> [37599.007323] ---[ end trace d69f6a17f8ac8eee ]--- While there, also check if path mtu discovery is activated for this socket. The logic was adapted from ip6_append_data when first writing on the corked socket. This bug was introduced with commit 0c1833797a5a6ec23ea9261d979aa18078720b74 ("ipv6: fix incorrect ipsec fragment"). v2: a) Replace IPV6_PMTU_DISC_DO with IPV6_PMTUDISC_PROBE. b) Don't pass ipv6_pinfo to ip6_append_data_mtu (suggestion by Gao feng, thanks!). c) Change mtu to unsigned int, else we get a warning about non-matching types because of the min()-macro type-check. Acked-by: Gao feng <gaofeng@cn.fujitsu.com> Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02ipv6: call udp_push_pending_frames when uncorking a socket with AF_INET ↵Hannes Frederic Sowa2-2/+8
pending data We accidentally call down to ip6_push_pending_frames when uncorking pending AF_INET data on a ipv6 socket. This results in the following splat (from Dave Jones): skbuff: skb_under_panic: text:ffffffff816765f6 len:48 put:40 head:ffff88013deb6df0 data:ffff88013deb6dec tail:0x2c end:0xc0 dev:<NULL> ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:126! invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC Modules linked in: dccp_ipv4 dccp 8021q garp bridge stp dlci mpoa snd_seq_dummy sctp fuse hidp tun bnep nfnetlink scsi_transport_iscsi rfcomm can_raw can_bcm af_802154 appletalk caif_socket can caif ipt_ULOG x25 rose af_key pppoe pppox ipx phonet irda llc2 ppp_generic slhc p8023 psnap p8022 llc crc_ccitt atm bluetooth +netrom ax25 nfc rfkill rds af_rxrpc coretemp hwmon kvm_intel kvm crc32c_intel snd_hda_codec_realtek ghash_clmulni_intel microcode pcspkr snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hwdep usb_debug snd_seq snd_seq_device snd_pcm e1000e snd_page_alloc snd_timer ptp snd pps_core soundcore xfs libcrc32c CPU: 2 PID: 8095 Comm: trinity-child2 Not tainted 3.10.0-rc7+ #37 task: ffff8801f52c2520 ti: ffff8801e6430000 task.ti: ffff8801e6430000 RIP: 0010:[<ffffffff816e759c>] [<ffffffff816e759c>] skb_panic+0x63/0x65 RSP: 0018:ffff8801e6431de8 EFLAGS: 00010282 RAX: 0000000000000086 RBX: ffff8802353d3cc0 RCX: 0000000000000006 RDX: 0000000000003b90 RSI: ffff8801f52c2ca0 RDI: ffff8801f52c2520 RBP: ffff8801e6431e08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88022ea0c800 R13: ffff88022ea0cdf8 R14: ffff8802353ecb40 R15: ffffffff81cc7800 FS: 00007f5720a10740(0000) GS:ffff880244c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000005862000 CR3: 000000022843c000 CR4: 00000000001407e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Stack: ffff88013deb6dec 000000000000002c 00000000000000c0 ffffffff81a3f6e4 ffff8801e6431e18 ffffffff8159a9aa ffff8801e6431e90 ffffffff816765f6 ffffffff810b756b 0000000700000002 ffff8801e6431e40 0000fea9292aa8c0 Call Trace: [<ffffffff8159a9aa>] skb_push+0x3a/0x40 [<ffffffff816765f6>] ip6_push_pending_frames+0x1f6/0x4d0 [<ffffffff810b756b>] ? mark_held_locks+0xbb/0x140 [<ffffffff81694919>] udp_v6_push_pending_frames+0x2b9/0x3d0 [<ffffffff81694660>] ? udplite_getfrag+0x20/0x20 [<ffffffff8162092a>] udp_lib_setsockopt+0x1aa/0x1f0 [<ffffffff811cc5e7>] ? fget_light+0x387/0x4f0 [<ffffffff816958a4>] udpv6_setsockopt+0x34/0x40 [<ffffffff815949f4>] sock_common_setsockopt+0x14/0x20 [<ffffffff81593c31>] SyS_setsockopt+0x71/0xd0 [<ffffffff816f5d54>] tracesys+0xdd/0xe2 Code: 00 00 48 89 44 24 10 8b 87 d8 00 00 00 48 89 44 24 08 48 8b 87 e8 00 00 00 48 c7 c7 c0 04 aa 81 48 89 04 24 31 c0 e8 e1 7e ff ff <0f> 0b 55 48 89 e5 0f 0b 55 48 89 e5 0f 0b 55 48 89 e5 0f 0b 55 RIP [<ffffffff816e759c>] skb_panic+0x63/0x65 RSP <ffff8801e6431de8> This patch adds a check if the pending data is of address family AF_INET and directly calls udp_push_ending_frames from udp_v6_push_pending_frames if that is the case. This bug was found by Dave Jones with trinity. (Also move the initialization of fl6 below the AF_INET check, even if not strictly necessary.) Cc: Dave Jones <davej@redhat.com> Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02ipip: fix a regression in ioctlCong Wang1-5/+7
This is a regression introduced by commit fd58156e456d9f68fe0448 (IPIP: Use ip-tunneling code.) Similar to GRE tunnel, previously we only check the parameters for SIOCADDTUNNEL and SIOCCHGTUNNEL, after that commit, the check is moved for all commands. So, just check for SIOCADDTUNNEL and SIOCCHGTUNNEL. Also, the check for i_key, o_key etc. is suspicious too, which did not exist before, reset them before passing to ip_tunnel_ioctl(). Cc: Pravin B Shelar <pshelar@nicira.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02l2tp: add missing .owner to struct pppox_protoWei Yongjun1-1/+2
Add missing .owner of struct pppox_proto. This prevents the module from being removed from underneath its users. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02ethtool: make .get_dump_data() harder to misuse by driversMichal Schmidt1-1/+20
As the patch "bnx2x: remove zeroing of dump data buffer" showed, it is too easy implement .get_dump_data incorrectly in a driver. Let's make sure drivers cannot get confused by userspace requesting a too big dump. Also WARN if the driver sets dump->len to something weird and make sure the length reported to userspace is the actual length of data copied to userspace. Signed-off-by: Michal Schmidt <mschmidt@redhat.com> Reviewed-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02net: sctp: get rid of SCTP_DBG_TSNS entirelyDaniel Borkmann2-114/+0
After having reworked the debugging framework, Neil and Vlad agreed to get rid of the leftover SCTP_DBG_TSNS code for a couple of reasons: We can use systemtap scripts to investigate these things, we now have pr_debug() helpers that make life easier, and if we really need anything else besides those tools, we will be forced to come up with something better than we have there. Therefore, get rid of this ifdef debugging code entirely for now. Signed-off-by: Daniel Borkmann <dborkman@redhat.com> CC: Vlad Yasevich <vyasevich@gmail.com> CC: Neil Horman <nhorman@tuxdriver.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02ipv6,mcast: always hold idev->lock before mca_lockAmerigo Wang2-10/+12
dingtianhong reported the following deadlock detected by lockdep: ====================================================== [ INFO: possible circular locking dependency detected ] 3.4.24.05-0.1-default #1 Not tainted ------------------------------------------------------- ksoftirqd/0/3 is trying to acquire lock: (&ndev->lock){+.+...}, at: [<ffffffff8147f804>] ipv6_get_lladdr+0x74/0x120 but task is already holding lock: (&mc->mca_lock){+.+...}, at: [<ffffffff8149d130>] mld_send_report+0x40/0x150 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&mc->mca_lock){+.+...}: [<ffffffff810a8027>] validate_chain+0x637/0x730 [<ffffffff810a8417>] __lock_acquire+0x2f7/0x500 [<ffffffff810a8734>] lock_acquire+0x114/0x150 [<ffffffff814f691a>] rt_spin_lock+0x4a/0x60 [<ffffffff8149e4bb>] igmp6_group_added+0x3b/0x120 [<ffffffff8149e5d8>] ipv6_mc_up+0x38/0x60 [<ffffffff81480a4d>] ipv6_find_idev+0x3d/0x80 [<ffffffff81483175>] addrconf_notify+0x3d5/0x4b0 [<ffffffff814fae3f>] notifier_call_chain+0x3f/0x80 [<ffffffff81073471>] raw_notifier_call_chain+0x11/0x20 [<ffffffff813d8722>] call_netdevice_notifiers+0x32/0x60 [<ffffffff813d92d4>] __dev_notify_flags+0x34/0x80 [<ffffffff813d9360>] dev_change_flags+0x40/0x70 [<ffffffff813ea627>] do_setlink+0x237/0x8a0 [<ffffffff813ebb6c>] rtnl_newlink+0x3ec/0x600 [<ffffffff813eb4d0>] rtnetlink_rcv_msg+0x160/0x310 [<ffffffff814040b9>] netlink_rcv_skb+0x89/0xb0 [<ffffffff813eb357>] rtnetlink_rcv+0x27/0x40 [<ffffffff81403e20>] netlink_unicast+0x140/0x180 [<ffffffff81404a9e>] netlink_sendmsg+0x33e/0x380 [<ffffffff813c4252>] sock_sendmsg+0x112/0x130 [<ffffffff813c537e>] __sys_sendmsg+0x44e/0x460 [<ffffffff813c5544>] sys_sendmsg+0x44/0x70 [<ffffffff814feab9>] system_call_fastpath+0x16/0x1b -> #0 (&ndev->lock){+.+...}: [<ffffffff810a798e>] check_prev_add+0x3de/0x440 [<ffffffff810a8027>] validate_chain+0x637/0x730 [<ffffffff810a8417>] __lock_acquire+0x2f7/0x500 [<ffffffff810a8734>] lock_acquire+0x114/0x150 [<ffffffff814f6c82>] rt_read_lock+0x42/0x60 [<ffffffff8147f804>] ipv6_get_lladdr+0x74/0x120 [<ffffffff8149b036>] mld_newpack+0xb6/0x160 [<ffffffff8149b18b>] add_grhead+0xab/0xc0 [<ffffffff8149d03b>] add_grec+0x3ab/0x460 [<ffffffff8149d14a>] mld_send_report+0x5a/0x150 [<ffffffff8149f99e>] igmp6_timer_handler+0x4e/0xb0 [<ffffffff8105705a>] call_timer_fn+0xca/0x1d0 [<ffffffff81057b9f>] run_timer_softirq+0x1df/0x2e0 [<ffffffff8104e8c7>] handle_pending_softirqs+0xf7/0x1f0 [<ffffffff8104ea3b>] __do_softirq_common+0x7b/0xf0 [<ffffffff8104f07f>] __thread_do_softirq+0x1af/0x210 [<ffffffff8104f1c1>] run_ksoftirqd+0xe1/0x1f0 [<ffffffff8106c7de>] kthread+0xae/0xc0 [<ffffffff814fff74>] kernel_thread_helper+0x4/0x10 actually we can just hold idev->lock before taking pmc->mca_lock, and avoid taking idev->lock again when iterating idev->addr_list, since the upper callers of mld_newpack() already take read_lock_bh(&idev->lock). Reported-by: dingtianhong <dingtianhong@huawei.com> Cc: dingtianhong <dingtianhong@huawei.com> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: David S. Miller <davem@davemloft.net> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Tested-by: Ding Tianhong <dingtianhong@huawei.com> Tested-by: Chen Weilong <chenweilong@huawei.com> Signed-off-by: Cong Wang <amwang@redhat.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02vti: remove duplicated code to fix a memory leakCong Wang1-7/+0
vti module allocates dev->tstats twice: in vti_fb_tunnel_init() and in vti_tunnel_init(), this lead to a memory leak of dev->tstats. Just remove the duplicated operations in vti_fb_tunnel_init(). (candidate for -stable) Cc: Stephen Hemminger <stephen@networkplumber.org> Cc: Saurabh Mohan <saurabh.mohan@vyatta.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Acked-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02gre: fix a regression in ioctlCong Wang1-4/+5
When testing GRE tunnel, I got: # ip tunnel show get tunnel gre0 failed: Invalid argument get tunnel gre1 failed: Invalid argument This is a regression introduced by commit c54419321455631079c7d ("GRE: Refactor GRE tunneling code.") because previously we only check the parameters for SIOCADDTUNNEL and SIOCCHGTUNNEL, after that commit, the check is moved for all commands. So, just check for SIOCADDTUNNEL and SIOCCHGTUNNEL. After this patch I got: # ip tunnel show gre0: gre/ip remote any local any ttl inherit nopmtudisc gre1: gre/ip remote 192.168.122.101 local 192.168.122.45 ttl inherit Cc: Pravin B Shelar <pshelar@nicira.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02net: sctp: rework debugging framework to use pr_debug and friendsDaniel Borkmann16-409/+383
We should get rid of all own SCTP debug printk macros and use the ones that the kernel offers anyway instead. This makes the code more readable and conform to the kernel code, and offers all the features of dynamic debbuging that pr_debug() et al has, such as only turning on/off portions of debug messages at runtime through debugfs. The runtime cost of having CONFIG_DYNAMIC_DEBUG enabled, but none of the debug statements printing, is negligible [1]. If kernel debugging is completly turned off, then these statements will also compile into "empty" functions. While we're at it, we also need to change the Kconfig option as it /now/ only refers to the ifdef'ed code portions in outqueue.c that enable further debugging/tracing of SCTP transaction fields. Also, since SCTP_ASSERT code was enabled with this Kconfig option and has now been removed, we transform those code parts into WARNs resp. where appropriate BUG_ONs so that those bugs can be more easily detected as probably not many people have SCTP debugging permanently turned on. To turn on all SCTP debugging, the following steps are needed: # mount -t debugfs none /sys/kernel/debug # echo -n 'module sctp +p' > /sys/kernel/debug/dynamic_debug/control This can be done more fine-grained on a per file, per line basis and others as described in [2]. [1] https://www.kernel.org/doc/ols/2009/ols2009-pages-39-46.pdf [2] Documentation/dynamic-debug-howto.txt Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02Merge branch 'master' of ↵David S. Miller2-8/+5
git://git.kernel.org/pub/scm/linux/kernel/git/shemminger/vxlan-next Stephen Hemminger says: ==================== Here is current updates for vxlan in net-next. It includes Mike's changes to handle multiple destinations and lots of little cosmetic stuff. This is a fresh vxlan-next repository which was forked from net-next. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02x25: Fix broken locking in ioctl error paths.Dave Jones1-7/+8
Two of the x25 ioctl cases have error paths that break out of the function without unlocking the socket, leading to this warning: ================================================ [ BUG: lock held when returning to user space! ] 3.10.0-rc7+ #36 Not tainted ------------------------------------------------ trinity-child2/31407 is leaving the kernel with locks still held! 1 lock held by trinity-child2/31407: #0: (sk_lock-AF_X25){+.+.+.}, at: [<ffffffffa024b6da>] x25_ioctl+0x8a/0x740 [x25] Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02netem: use rb tree to implement the time queueEric Dumazet1-24/+85
Following typical setup to implement a ~100 ms RTT and big amount of reorders has very poor performance because netem implements the time queue using a linked list. ----------------------------------------------------------- ETH=eth0 IFB=ifb0 modprobe ifb ip link set dev $IFB up tc qdisc add dev $ETH ingress 2>/dev/null tc filter add dev $ETH parent ffff: \ protocol ip u32 match u32 0 0 flowid 1:1 action mirred egress \ redirect dev $IFB ethtool -K $ETH gro off tso off gso off tc qdisc add dev $IFB root netem delay 50ms 10ms limit 100000 tc qd add dev $ETH root netem delay 50ms limit 100000 --------------------------------------------------------- Switch netem time queue to a rb tree, so this kind of setup can work at high speed. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02neighbour: fix a race in neigh_destroy()Eric Dumazet1-5/+7
There is a race in neighbour code, because neigh_destroy() uses skb_queue_purge(&neigh->arp_queue) without holding neighbour lock, while other parts of the code assume neighbour rwlock is what protects arp_queue Convert all skb_queue_purge() calls to the __skb_queue_purge() variant Use __skb_queue_head_init() instead of skb_queue_head_init() to make clear we do not use arp_queue.lock And hold neigh->lock in neigh_destroy() to close the race. Reported-by: Joe Jin <joe.jin@oracle.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02ipv6: fix ecmp lookup when oif is specifiedNicolas Dichtel1-4/+8
There is no reason to skip ECMP lookup when oif is specified, but this implies to check oif given by user when selecting another route. When the new route does not match oif requirement, we simply keep the initial one. Spotted-by: dingzhi <zhi.ding@6wind.com> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02ipv6: only apply anti-spoofing checks to not-pointopoint tunnelsHannes Frederic Sowa1-1/+1
Because of commit 218774dc341f219bfcf940304a081b121a0e8099 ("ipv6: add anti-spoofing checks for 6to4 and 6rd") the sit driver dropped packets for 2002::/16 destinations and sources even when configured to work as a tunnel with fixed endpoint. We may only apply the 6rd/6to4 anti-spoofing checks if the device is not in pointopoint mode. This was an oversight from me in the above commit, sorry. Thanks to Roman Mamedov for reporting this! Reported-by: Roman Mamedov <rm@romanrm.ru> Cc: David Miller <davem@davemloft.net> Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02Merge branch 'for-davem' of ↵David S. Miller26-555/+682
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next John W. Linville says: ==================== Yet one more pull request for wireless updates intended for 3.11... For the mac80211 bits, Johannes says: "Here we have a few memory leak fixes related to BSS struct handling mostly from Ben, including a fix for a more theoretical problem (associating while a BSS struct times out) from myself, a compilation warning fix from Arend, mesh fixes from Thomas, tracking the beacon bitrate (Alex), a bandwidth change event fix (Ilan) and some initial work for 5/10 MHz channels from Simon." Regarding the iwlwifi bits, Johannes says: "Emmanuel removed some unneeded/unsupported module parameters and adds a Bluetooth 1x1 lookup-table for some upcoming products. From Alex I have an older patch to add low-power receive support, this depended on a mac80211 commit that only just came in with the merge from wireless-next I did. Ilan made beacon timings better, and Eytan added some debug statements for thermal throttling. I have a few cleanups, a fix for a long-standing but rare warning, and, arguably the most important patch here, the firmware API version bump for the 7260/3160 devices." Also included is a Bluetooth pull -- Gustavo says: "Here goes a set of patches to 3.11. The biggest work here is from Andre Guedes on the move of the Discovery to use the new request framework. Other than that Johan provided a bunch of fixes to the L2CAP code. The rest are just small fixes and clean ups." On top of all that, there are a variety of updates and fixes to brcmfmac, rt2x00, wil6210, ath9k, ath10k, and a few others here and there. This also includes a pull of the wireless tree, in order to prevent some merge conflicts. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-02openvswitch: Add Kconfig dependency on GRE-DEMUX.Pravin B Shelar3-5/+18
Openvswitch uses function from NET_IPGRE_DEMUX module. Add Kconfig dependency to fix following compilation errors: http://marc.info/?l=linux-netdev&m=137244035226634 CC: Jesse Gross <jesse@nicira.com> Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Pravin Shelar <pshelar@nicira.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Jesse Gross <jesse@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-01Merge branch 'master' of ↵David S. Miller22-783/+451
git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next Pablo Neira Ayuso says: ==================== The following batch contains Netfilter/IPVS updates for net-next, they are: * Enforce policy to several nfnetlink subsystem, from Daniel Borkmann. * Use xt_socket to match the third packet (to perform simplistic socket-based stateful filtering), from Eric Dumazet. * Avoid large timeout for picked up from the middle TCP flows, from Florian Westphal. * Exclude IPVS from struct net if IPVS is disabled and removal of unnecessary included header file, from JunweiZhang. * Release SCTP connection immediately under load, to mimic current TCP behaviour, from Julian Anastasov. * Replace and enhance SCTP state machine, from Julian Anastasov. * Add tweak to reduce sync traffic in the presence of persistence, also from Julian Anastasov. * Add tweak for the IPVS SH scheduler not to reject connections directed to a server, choose a new one instead, from Alexander Frolkin. * Add support for sloppy TCP and SCTP modes, that creates state information on any packet, not only initial handshake packets, from Alexander Frolkin. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-30netfilter: nf_queue: add NFQA_SKB_CSUM_NOTVERIFIED info flagFlorian Westphal1-2/+14
The common case is that TCP/IP checksums have already been verified, e.g. by hardware (rx checksum offload), or conntrack. Userspace can use this flag to determine when the checksum has not been validated yet. If the flag is set, this doesn't necessarily mean that the packet has an invalid checksum, e.g. if NIC doesn't support rx checksum. Userspace that sucessfully enabled NFQA_CFG_F_GSO queue feature flag can infer that IP/TCP checksum has already been validated if either the SKB_INFO attribute is not present or the NFQA_SKB_CSUM_NOTVERIFIED flag is unset. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2013-06-29ipv4: use next hop exceptions also for input routesTimo Teräs2-16/+52
Commit d2d68ba9 (ipv4: Cache input routes in fib_info nexthops) assmued that "locally destined, and routed packets, never trigger PMTU events or redirects that will be processed by us". However, it seems that tunnel devices do trigger PMTU events in certain cases. At least ip_gre, ip6_gre, sit, and ipip do use the inner flow's skb_dst(skb)->ops->update_pmtu to propage mtu information from the outer flows. These can cause the inner flow mtu to be decreased. If next hop exceptions are not consulted for pmtu, IP fragmentation will not be done properly for these routes. It also seems that we really need to have the PMTU information always for netfilter TCPMSS clamp-to-pmtu feature to work properly. So for the time being, cache separate copies of input routes for each next hop exception. Signed-off-by: Timo Teräs <timo.teras@iki.fi> Reviewed-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-29ipv6: resend MLD report if a link-local address completes DADHannes Frederic Sowa2-5/+64
RFC3590/RFC3810 specifies we should resend MLD reports as soon as a valid link-local address is available. We now use the valid_ll_addr_cnt to check if it is necessary to resend a new report. Changes since Flavio Leitner's version: a) adapt for valid_ll_addr_cnt b) resend first reports directly in the path and just arm the timer for mc_qrv-1 resends. Reported-by: Flavio Leitner <fleitner@redhat.com> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: David Stevens <dlstevens@us.ibm.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: Flavio Leitner <fbl@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-29ipv6: introduce per-interface counter for dad-completed ipv6 addressesHannes Frederic Sowa1-8/+31
To reduce the number of unnecessary router solicitations, MLDv2 and IGMPv3 messages we need to track the number of valid (as in non-optimistic, no-dad-failed and non-tentative) link-local addresses. Therefore, this patch implements a valid_ll_addr_cnt in struct inet6_dev. We now only emit router solicitations if the first link-local address finishes duplicate address detection. The changes for MLDv2 and IGMPv3 are in a follow-up patch. While there, also simplify one if statement(one minor nit I made in one of my previous patches): if (!...) do(); else return; <<into>> if (...) return; do(); Cc: Flavio Leitner <fbl@redhat.com> Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Cc: David Stevens <dlstevens@us.ibm.com> Suggested-by: David Stevens <dlstevens@us.ibm.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Flavio Leitner <fbl@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-28Merge branch 'master' of ↵John W. Linville26-555/+682
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem Conflicts: net/wireless/nl80211.c
2013-06-28netlink: fix splat in skb_clone with large messagesPablo Neira2-18/+19
Since (c05cdb1 netlink: allow large data transfers from user-space), netlink splats if it invokes skb_clone on large netlink skbs since: * skb_shared_info was not correctly initialized. * skb->destructor is not set in the cloned skb. This was spotted by trinity: [ 894.990671] BUG: unable to handle kernel paging request at ffffc9000047b001 [ 894.991034] IP: [<ffffffff81a212c4>] skb_clone+0x24/0xc0 [...] [ 894.991034] Call Trace: [ 894.991034] [<ffffffff81ad299a>] nl_fib_input+0x6a/0x240 [ 894.991034] [<ffffffff81c3b7e6>] ? _raw_read_unlock+0x26/0x40 [ 894.991034] [<ffffffff81a5f189>] netlink_unicast+0x169/0x1e0 [ 894.991034] [<ffffffff81a601e1>] netlink_sendmsg+0x251/0x3d0 Fix it by: 1) introducing a new netlink_skb_clone function that is used in nl_fib_input, that sets our special skb->destructor in the cloned skb. Moreover, handle the release of the large cloned skb head area in the destructor path. 2) not allowing large skbuffs in the netlink broadcast path. I cannot find any reasonable use of the large data transfer using netlink in that path, moreover this helps to skip extra skb_clone handling. I found two more netlink clients that are cloning the skbs, but they are not in the sendmsg path. Therefore, the sole client cloning that I found seems to be the fib frontend. Thanks to Eric Dumazet for helping to address this issue. Reported-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-28sit: add support of x-netnsNicolas Dichtel2-11/+41
This patch allows to switch the netns when packet is encapsulated or decapsulated. In other word, the encapsulated packet is received in a netns, where the lookup is done to find the tunnel. Once the tunnel is found, the packet is decapsulated and injecting into the corresponding interface which stands to another netns. When one of the two netns is removed, the tunnel is destroyed. Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-28dev: introduce skb_scrub_packet()Nicolas Dichtel2-10/+24
The goal of this new function is to perform all needed cleanup before sending an skb into another netns. Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-27ipv6: rearm router solicitaion timer when setting new tokenized addressHannes Frederic Sowa1-1/+4
When a new tokenized address gets installed we send out just one router solicition. We should send out `rtr_solicits' in case one router advertisment got lost. So, rearm the timer as we do in addrconf_dad_complete. Cc: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-27af_key: fix info leaks in notify messagesMathias Krause1-0/+2
key_notify_sa_flush() and key_notify_policy_flush() miss to initialize the sadb_msg_reserved member of the broadcasted message and thereby leak 2 bytes of heap memory to listeners. Fix that. Signed-off-by: Mathias Krause <minipli@googlemail.com> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-27ipv6: ip6_sk_dst_check() must not assume ipv6 dstEric Dumazet1-1/+7
It's possible to use AF_INET6 sockets and to connect to an IPv4 destination. After this, socket dst cache is a pointer to a rtable, not rt6_info. ip6_sk_dst_check() should check the socket dst cache is IPv6, or else various corruptions/crashes can happen. Dave Jones can reproduce immediate crash with trinity -q -l off -n -c sendmsg -c connect With help from Hannes Frederic Sowa Reported-by: Dave Jones <davej@redhat.com> Reported-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-27net: fix kernel deadlock with interface rename and netdev name retrieval.Nicolas Schichan3-30/+40
When the kernel (compiled with CONFIG_PREEMPT=n) is performing the rename of a network interface, it can end up waiting for a workqueue to complete. If userland is able to invoke a SIOCGIFNAME ioctl or a SO_BINDTODEVICE getsockopt in between, the kernel will deadlock due to the fact that read_secklock_begin() will spin forever waiting for the writer process (the one doing the interface rename) to update the devnet_rename_seq sequence. This patch fixes the problem by adding a helper (netdev_get_name()) and using it in the code handling the SIOCGIFNAME ioctl and SO_BINDTODEVICE setsockopt. The netdev_get_name() helper uses raw_seqcount_begin() to avoid spinning forever, waiting for devnet_rename_seq->sequence to become even. cond_resched() is used in the contended case, before retrying the access to give the writer process a chance to finish. The use of raw_seqcount_begin() will incur some unneeded work in the reader process in the contended case, but this is better than deadlocking the system. Signed-off-by: Nicolas Schichan <nschichan@freebox.fr> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-27sit: fix 4in4 + IPsec scenarioNicolas Dichtel1-1/+1
Since commit 32b8a8e59c9c "sit: add IPv4 over IPv4 support", tunnel->parms.iph.protocol is 0 when both 4in4 and 6in4 are setup, but xfrm_lookup() is called only when proto is != 0, thus we need to pass the real value. Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-27Merge branch 'master' of ↵David S. Miller2-0/+6
git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next Steffen Klassert says: ==================== Just one patch this time. 1) Drop packets when the matching SA is in larval state and add a statistic counter for that. From Fan Du. Please pull or let me know if there are problems. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2013-06-26Merge branch 'master' of ↵John W. Linville1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
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