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2020-01-27net: include struct nhmsg size in nh nlmsg sizeStephen Worley1-1/+3
Include the size of struct nhmsg size when calculating how much of a payload to allocate in a new netlink nexthop notification message. Without this, we will fail to fill the skbuff at certain nexthop group sizes. You can reproduce the failure with the following iproute2 commands: ip link add dummy1 type dummy ip link add dummy2 type dummy ip link add dummy3 type dummy ip link add dummy4 type dummy ip link add dummy5 type dummy ip link add dummy6 type dummy ip link add dummy7 type dummy ip link add dummy8 type dummy ip link add dummy9 type dummy ip link add dummy10 type dummy ip link add dummy11 type dummy ip link add dummy12 type dummy ip link add dummy13 type dummy ip link add dummy14 type dummy ip link add dummy15 type dummy ip link add dummy16 type dummy ip link add dummy17 type dummy ip link add dummy18 type dummy ip link add dummy19 type dummy ip ro add 1.1.1.1/32 dev dummy1 ip ro add 1.1.1.2/32 dev dummy2 ip ro add 1.1.1.3/32 dev dummy3 ip ro add 1.1.1.4/32 dev dummy4 ip ro add 1.1.1.5/32 dev dummy5 ip ro add 1.1.1.6/32 dev dummy6 ip ro add 1.1.1.7/32 dev dummy7 ip ro add 1.1.1.8/32 dev dummy8 ip ro add 1.1.1.9/32 dev dummy9 ip ro add 1.1.1.10/32 dev dummy10 ip ro add 1.1.1.11/32 dev dummy11 ip ro add 1.1.1.12/32 dev dummy12 ip ro add 1.1.1.13/32 dev dummy13 ip ro add 1.1.1.14/32 dev dummy14 ip ro add 1.1.1.15/32 dev dummy15 ip ro add 1.1.1.16/32 dev dummy16 ip ro add 1.1.1.17/32 dev dummy17 ip ro add 1.1.1.18/32 dev dummy18 ip ro add 1.1.1.19/32 dev dummy19 ip next add id 1 via 1.1.1.1 dev dummy1 ip next add id 2 via 1.1.1.2 dev dummy2 ip next add id 3 via 1.1.1.3 dev dummy3 ip next add id 4 via 1.1.1.4 dev dummy4 ip next add id 5 via 1.1.1.5 dev dummy5 ip next add id 6 via 1.1.1.6 dev dummy6 ip next add id 7 via 1.1.1.7 dev dummy7 ip next add id 8 via 1.1.1.8 dev dummy8 ip next add id 9 via 1.1.1.9 dev dummy9 ip next add id 10 via 1.1.1.10 dev dummy10 ip next add id 11 via 1.1.1.11 dev dummy11 ip next add id 12 via 1.1.1.12 dev dummy12 ip next add id 13 via 1.1.1.13 dev dummy13 ip next add id 14 via 1.1.1.14 dev dummy14 ip next add id 15 via 1.1.1.15 dev dummy15 ip next add id 16 via 1.1.1.16 dev dummy16 ip next add id 17 via 1.1.1.17 dev dummy17 ip next add id 18 via 1.1.1.18 dev dummy18 ip next add id 19 via 1.1.1.19 dev dummy19 ip next add id 1111 group 1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18/19 ip next del id 1111 Fixes: 430a049190de ("nexthop: Add support for nexthop groups") Signed-off-by: Stephen Worley <sworley@cumulusnetworks.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-26tcp: export count for rehash attemptsAbdul Kabbani4-1/+13
Using IPv6 flow-label to swiftly route around avoid congested or disconnected network path can greatly improve TCP reliability. This patch adds SNMP counters and a OPT_STATS counter to track both host-level and connection-level statistics. Network administrators can use these counters to evaluate the impact of this new ability better. Export count for rehash attempts to 1) two SNMP counters: TcpTimeoutRehash (rehash due to timeouts), and TcpDuplicateDataRehash (rehash due to receiving duplicate packets) 2) Timestamping API SOF_TIMESTAMPING_OPT_STATS. Signed-off-by: Abdul Kabbani <akabbani@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Kevin(Yudong) Yang <yyd@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller10-11/+23
Minor conflict in mlx5 because changes happened to code that has moved meanwhile. Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-24mptcp: parse and emit MP_CAPABLE option according to v1 specChristoph Paasch2-2/+2
This implements MP_CAPABLE options parsing and writing according to RFC 6824 bis / RFC 8684: MPTCP v1. Local key is sent on syn/ack, and both keys are sent on 3rd ack. MP_CAPABLE messages len are updated accordingly. We need the skbuff to correctly emit the above, so we push the skbuff struct as an argument all the way from tcp code to the relevant mptcp callbacks. When processing incoming MP_CAPABLE + data, build a full blown DSS-like map info, to simplify later processing. On child socket creation, we need to record the remote key, if available. Signed-off-by: Christoph Paasch <cpaasch@apple.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-24mptcp: Implement MPTCP receive pathMat Martineau1-1/+7
Parses incoming DSS options and populates outgoing MPTCP ACK fields. MPTCP fields are parsed from the TCP option header and placed in an skb extension, allowing the upper MPTCP layer to access MPTCP options after the skb has gone through the TCP stack. The subflow implements its own data_ready() ops, which ensures that the pending data is in sequence - according to MPTCP seq number - dropping out-of-seq skbs. The DATA_READY bit flag is set if this is the case. This allows the MPTCP socket layer to determine if more data is available without having to consult the individual subflows. It additionally validates the current mapping and propagates EoF events to the connection socket. Co-developed-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Co-developed-by: Peter Krystad <peter.krystad@linux.intel.com> Signed-off-by: Peter Krystad <peter.krystad@linux.intel.com> Co-developed-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Co-developed-by: Florian Westphal <fw@strlen.de> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Christoph Paasch <cpaasch@apple.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-24mptcp: Handle MP_CAPABLE options for outgoing connectionsPeter Krystad2-0/+50
Add hooks to tcp_output.c to add MP_CAPABLE to an outgoing SYN request, to capture the MP_CAPABLE in the received SYN-ACK, to add MP_CAPABLE to the final ACK of the three-way handshake. Use the .sk_rx_dst_set() handler in the subflow proto to capture when the responding SYN-ACK is received and notify the MPTCP connection layer. Co-developed-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Co-developed-by: Florian Westphal <fw@strlen.de> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Peter Krystad <peter.krystad@linux.intel.com> Signed-off-by: Christoph Paasch <cpaasch@apple.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-24mptcp: Handle MPTCP TCP optionsPeter Krystad2-0/+18
Add hooks to parse and format the MP_CAPABLE option. This option is handled according to MPTCP version 0 (RFC6824). MPTCP version 1 MP_CAPABLE (RFC6824bis/RFC8684) will be added later in coordination with related code changes. Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Co-developed-by: Florian Westphal <fw@strlen.de> Signed-off-by: Florian Westphal <fw@strlen.de> Co-developed-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: Peter Krystad <peter.krystad@linux.intel.com> Signed-off-by: Christoph Paasch <cpaasch@apple.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-24mptcp: Add MPTCP socket stubsMat Martineau1-0/+2
Implements the infrastructure for MPTCP sockets. MPTCP sockets open one in-kernel TCP socket per subflow. These subflow sockets are only managed by the MPTCP socket that owns them and are not visible from userspace. This commit allows a userspace program to open an MPTCP socket with: sock = socket(AF_INET, SOCK_STREAM, IPPROTO_MPTCP); The resulting socket is simply a wrapper around a single regular TCP socket, without any of the MPTCP protocol implemented over the wire. Co-developed-by: Florian Westphal <fw@strlen.de> Signed-off-by: Florian Westphal <fw@strlen.de> Co-developed-by: Peter Krystad <peter.krystad@linux.intel.com> Signed-off-by: Peter Krystad <peter.krystad@linux.intel.com> Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Co-developed-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Christoph Paasch <cpaasch@apple.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-24rt_cpu_seq_next should increase position indexVasily Averin1-0/+1
if seq_file .next fuction does not change position index, read after some lseek can generate unexpected output. https://bugzilla.kernel.org/show_bug.cgi?id=206283 Signed-off-by: Vasily Averin <vvs@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-24tcp: do not leave dangling pointers in tp->highest_sackEric Dumazet3-0/+3
Latest commit 853697504de0 ("tcp: Fix highest_sack and highest_sack_seq") apparently allowed syzbot to trigger various crashes in TCP stack [1] I believe this commit only made things easier for syzbot to find its way into triggering use-after-frees. But really the bugs could lead to bad TCP behavior or even plain crashes even for non malicious peers. I have audited all calls to tcp_rtx_queue_unlink() and tcp_rtx_queue_unlink_and_free() and made sure tp->highest_sack would be updated if we are removing from rtx queue the skb that tp->highest_sack points to. These updates were missing in three locations : 1) tcp_clean_rtx_queue() [This one seems quite serious, I have no idea why this was not caught earlier] 2) tcp_rtx_queue_purge() [Probably not a big deal for normal operations] 3) tcp_send_synack() [Probably not a big deal for normal operations] [1] BUG: KASAN: use-after-free in tcp_highest_sack_seq include/net/tcp.h:1864 [inline] BUG: KASAN: use-after-free in tcp_highest_sack_seq include/net/tcp.h:1856 [inline] BUG: KASAN: use-after-free in tcp_check_sack_reordering+0x33c/0x3a0 net/ipv4/tcp_input.c:891 Read of size 4 at addr ffff8880a488d068 by task ksoftirqd/1/16 CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.5.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506 kasan_report+0x12/0x20 mm/kasan/common.c:639 __asan_report_load4_noabort+0x14/0x20 mm/kasan/generic_report.c:134 tcp_highest_sack_seq include/net/tcp.h:1864 [inline] tcp_highest_sack_seq include/net/tcp.h:1856 [inline] tcp_check_sack_reordering+0x33c/0x3a0 net/ipv4/tcp_input.c:891 tcp_try_undo_partial net/ipv4/tcp_input.c:2730 [inline] tcp_fastretrans_alert+0xf74/0x23f0 net/ipv4/tcp_input.c:2847 tcp_ack+0x2577/0x5bf0 net/ipv4/tcp_input.c:3710 tcp_rcv_established+0x6dd/0x1e90 net/ipv4/tcp_input.c:5706 tcp_v4_do_rcv+0x619/0x8d0 net/ipv4/tcp_ipv4.c:1619 tcp_v4_rcv+0x307f/0x3b40 net/ipv4/tcp_ipv4.c:2001 ip_protocol_deliver_rcu+0x5a/0x880 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x23b/0x380 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x1e9/0x520 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0x1db/0x2f0 net/ipv4/ip_input.c:428 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip_rcv+0xe8/0x3f0 net/ipv4/ip_input.c:538 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:5148 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5262 process_backlog+0x206/0x750 net/core/dev.c:6093 napi_poll net/core/dev.c:6530 [inline] net_rx_action+0x508/0x1120 net/core/dev.c:6598 __do_softirq+0x262/0x98c kernel/softirq.c:292 run_ksoftirqd kernel/softirq.c:603 [inline] run_ksoftirqd+0x8e/0x110 kernel/softirq.c:595 smpboot_thread_fn+0x6a3/0xa40 kernel/smpboot.c:165 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Allocated by task 10091: save_stack+0x23/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:486 kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:521 slab_post_alloc_hook mm/slab.h:584 [inline] slab_alloc_node mm/slab.c:3263 [inline] kmem_cache_alloc_node+0x138/0x740 mm/slab.c:3575 __alloc_skb+0xd5/0x5e0 net/core/skbuff.c:198 alloc_skb_fclone include/linux/skbuff.h:1099 [inline] sk_stream_alloc_skb net/ipv4/tcp.c:875 [inline] sk_stream_alloc_skb+0x113/0xc90 net/ipv4/tcp.c:852 tcp_sendmsg_locked+0xcf9/0x3470 net/ipv4/tcp.c:1282 tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1432 inet_sendmsg+0x9e/0xe0 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:672 __sys_sendto+0x262/0x380 net/socket.c:1998 __do_sys_sendto net/socket.c:2010 [inline] __se_sys_sendto net/socket.c:2006 [inline] __x64_sys_sendto+0xe1/0x1a0 net/socket.c:2006 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 10095: save_stack+0x23/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] kasan_set_free_info mm/kasan/common.c:335 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:474 kasan_slab_free+0xe/0x10 mm/kasan/common.c:483 __cache_free mm/slab.c:3426 [inline] kmem_cache_free+0x86/0x320 mm/slab.c:3694 kfree_skbmem+0x178/0x1c0 net/core/skbuff.c:645 __kfree_skb+0x1e/0x30 net/core/skbuff.c:681 sk_eat_skb include/net/sock.h:2453 [inline] tcp_recvmsg+0x1252/0x2930 net/ipv4/tcp.c:2166 inet_recvmsg+0x136/0x610 net/ipv4/af_inet.c:838 sock_recvmsg_nosec net/socket.c:886 [inline] sock_recvmsg net/socket.c:904 [inline] sock_recvmsg+0xce/0x110 net/socket.c:900 __sys_recvfrom+0x1ff/0x350 net/socket.c:2055 __do_sys_recvfrom net/socket.c:2073 [inline] __se_sys_recvfrom net/socket.c:2069 [inline] __x64_sys_recvfrom+0xe1/0x1a0 net/socket.c:2069 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8880a488d040 which belongs to the cache skbuff_fclone_cache of size 456 The buggy address is located 40 bytes inside of 456-byte region [ffff8880a488d040, ffff8880a488d208) The buggy address belongs to the page: page:ffffea0002922340 refcount:1 mapcount:0 mapping:ffff88821b057000 index:0x0 raw: 00fffe0000000200 ffffea00022a5788 ffffea0002624a48 ffff88821b057000 raw: 0000000000000000 ffff8880a488d040 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a488cf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a488cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880a488d000: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ^ ffff8880a488d080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880a488d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb Fixes: 853697504de0 ("tcp: Fix highest_sack and highest_sack_seq") Fixes: 50895b9de1d3 ("tcp: highest_sack fix") Fixes: 737ff314563c ("tcp: use sequence distance to detect reordering") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Cambda Zhu <cambda@linux.alibaba.com> Cc: Yuchung Cheng <ycheng@google.com> Cc: Neal Cardwell <ncardwell@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-23fou: Fix IPv6 netlink policyKristian Evensen1-2/+2
When submitting v2 of "fou: Support binding FoU socket" (1713cb37bf67), I accidentally sent the wrong version of the patch and one fix was missing. In the initial version of the patch, as well as the version 2 that I submitted, I incorrectly used ".type" for the two V6-attributes. The correct is to use ".len". Reported-by: Dmitry Vyukov <dvyukov@google.com> Fixes: 1713cb37bf67 ("fou: Support binding FoU socket") Signed-off-by: Kristian Evensen <kristian.evensen@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-23Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-nextDavid S. Miller6-14/+272
Alexei Starovoitov says: ==================== pull-request: bpf-next 2020-01-22 The following pull-request contains BPF updates for your *net-next* tree. We've added 92 non-merge commits during the last 16 day(s) which contain a total of 320 files changed, 7532 insertions(+), 1448 deletions(-). The main changes are: 1) function by function verification and program extensions from Alexei. 2) massive cleanup of selftests/bpf from Toke and Andrii. 3) batched bpf map operations from Brian and Yonghong. 4) tcp congestion control in bpf from Martin. 5) bulking for non-map xdp_redirect form Toke. 6) bpf_send_signal_thread helper from Yonghong. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-22Revert "udp: do rmem bulk free even if the rx sk queue is empty"Paolo Abeni1-1/+2
This reverts commit 0d4a6608f68c7532dcbfec2ea1150c9761767d03. Williem reported that after commit 0d4a6608f68c ("udp: do rmem bulk free even if the rx sk queue is empty") the memory allocated by an almost idle system with many UDP sockets can grow a lot. For stable kernel keep the solution as simple as possible and revert the offending commit. Reported-by: Willem de Bruijn <willemdebruijn.kernel@gmail.com> Diagnosed-by: Eric Dumazet <eric.dumazet@gmail.com> Fixes: 0d4a6608f68c ("udp: do rmem bulk free even if the rx sk queue is empty") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-21net, ip_tunnel: fix namespaces moveWilliam Dauchy1-3/+1
in the same manner as commit 690afc165bb3 ("net: ip6_gre: fix moving ip6gre between namespaces"), fix namespace moving as it was broken since commit 2e15ea390e6f ("ip_gre: Add support to collect tunnel metadata."). Indeed, the ip6_gre commit removed the local flag for collect_md condition, so there is no reason to keep it for ip_gre/ip_tunnel. this patch will fix both ip_tunnel and ip_gre modules. Fixes: 2e15ea390e6f ("ip_gre: Add support to collect tunnel metadata.") Signed-off-by: William Dauchy <w.dauchy@criteo.com> Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-21Merge branch 'master' of ↵David S. Miller4-26/+261
git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next Steffen Klassert says: ==================== pull request (net-next): ipsec-next 2020-01-21 1) Add support for TCP encapsulation of IKE and ESP messages, as defined by RFC 8229. Patchset from Sabrina Dubroca. Please note that there is a merge conflict in: net/unix/af_unix.c between commit: 3c32da19a858 ("unix: Show number of pending scm files of receive queue in fdinfo") from the net-next tree and commit: b50b0580d27b ("net: add queue argument to __skb_wait_for_more_packets and __skb_{,try_}recv_datagram") from the ipsec-next tree. The conflict can be solved as done in linux-next. Please pull or let me know if there are problems. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-21tcp/ipv4: remove AF_INET_FAMILYAlex Shi1-6/+0
After commit 079096f103fa ("tcp/dccp: install syn_recv requests into ehash table") the macro isn't used anymore. remove it. Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-21tcp: remove redundant assigment to snd_cwndTheodore Dubois1-1/+0
Not sure how this got in here. git blame says the second assignment was added in 3a9a57f6, but that commit also removed the first assignment. Signed-off-by: Theodore Dubois <tblodt@icloud.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-21tcp_bbr: improve arithmetic division in bbr_update_bw()Wen Yang1-2/+1
do_div() does a 64-by-32 division. Use div64_long() instead of it if the divisor is long, to avoid truncation to 32-bit. And as a nice side effect also cleans up the function a bit. Signed-off-by: Wen Yang <wenyang@linux.alibaba.com> Cc: Eric Dumazet <edumazet@google.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Cc: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-21Merge branch 'master' of ↵David S. Miller2-2/+13
git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec Steffen Klassert says: ==================== pull request (net): ipsec 2020-01-21 1) Fix packet tx through bpf_redirect() for xfrm and vti interfaces. From Nicolas Dichtel. 2) Do not confirm neighbor when do pmtu update on a virtual xfrm interface. From Xu Wang. 3) Support output_mark for offload ESP packets, this was forgotten when the output_mark was added initially. From Ulrich Weber. Please pull or let me know if there are problems. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-19Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/netDavid S. Miller5-24/+31
2020-01-17Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nfDavid S. Miller1-9/+10
Pablo Neira Ayuso says: ==================== Netfilter updates for net The following patchset contains Netfilter fixes for net: 1) Fix use-after-free in ipset bitmap destroy path, from Cong Wang. 2) Missing init netns in entry cleanup path of arp_tables, from Florian Westphal. 3) Fix WARN_ON in set destroy path due to missing cleanup on transaction error. 4) Incorrect netlink sanity check in tunnel, from Florian Westphal. 5) Missing sanity check for erspan version netlink attribute, also from Florian. 6) Remove WARN in nft_request_module() that can be triggered from userspace, from Florian Westphal. 7) Memleak in NFTA_HOOK_DEVS netlink parser, from Dan Carpenter. 8) List poison from commit path for flowtables that are added and deleted in the same batch, from Florian Westphal. 9) Fix NAT ICMP packet corruption, from Eyal Birger. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfDavid S. Miller2-12/+11
Daniel Borkmann says: ==================== pull-request: bpf 2020-01-15 The following pull-request contains BPF updates for your *net* tree. We've added 12 non-merge commits during the last 9 day(s) which contain a total of 13 files changed, 95 insertions(+), 43 deletions(-). The main changes are: 1) Fix refcount leak for TCP time wait and request sockets for socket lookup related BPF helpers, from Lorenz Bauer. 2) Fix wrong verification of ARSH instruction under ALU32, from Daniel Borkmann. 3) Batch of several sockmap and related TLS fixes found while operating more complex BPF programs with Cilium and OpenSSL, from John Fastabend. 4) Fix sockmap to read psock's ingress_msg queue before regular sk_receive_queue() to avoid purging data upon teardown, from Lingpeng Chen. 5) Fix printing incorrect pointer in bpftool's btf_dump_ptr() in order to properly dump a BPF map's value with BTF, from Martin KaFai Lau. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-15bpf: Sockmap/tls, fix pop data with SK_DROP return codeJohn Fastabend1-4/+1
When user returns SK_DROP we need to reset the number of copied bytes to indicate to the user the bytes were dropped and not sent. If we don't reset the copied arg sendmsg will return as if those bytes were copied giving the user a positive return value. This works as expected today except in the case where the user also pops bytes. In the pop case the sg.size is reduced but we don't correctly account for this when copied bytes is reset. The popped bytes are not accounted for and we return a small positive value potentially confusing the user. The reason this happens is due to a typo where we do the wrong comparison when accounting for pop bytes. In this fix notice the if/else is not needed and that we have a similar problem if we push data except its not visible to the user because if delta is larger the sg.size we return a negative value so it appears as an error regardless. Fixes: 7246d8ed4dcce ("bpf: helper to pop data from messages") Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/bpf/20200111061206.8028-9-john.fastabend@gmail.com
2020-01-15bpf: Sockmap/tls, push write_space updates through ulp updatesJohn Fastabend1-2/+4
When sockmap sock with TLS enabled is removed we cleanup bpf/psock state and call tcp_update_ulp() to push updates to TLS ULP on top. However, we don't push the write_space callback up and instead simply overwrite the op with the psock stored previous op. This may or may not be correct so to ensure we don't overwrite the TLS write space hook pass this field to the ULP and have it fixup the ctx. This completes a previous fix that pushed the ops through to the ULP but at the time missed doing this for write_space, presumably because write_space TLS hook was added around the same time. Fixes: 95fa145479fbc ("bpf: sockmap/tls, close can race with map free") Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com> Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/bpf/20200111061206.8028-4-john.fastabend@gmail.com
2020-01-15tcp: fix marked lost packets not being retransmittedPengcheng Yang1-3/+4
When the packet pointed to by retransmit_skb_hint is unlinked by ACK, retransmit_skb_hint will be set to NULL in tcp_clean_rtx_queue(). If packet loss is detected at this time, retransmit_skb_hint will be set to point to the current packet loss in tcp_verify_retransmit_hint(), then the packets that were previously marked lost but not retransmitted due to the restriction of cwnd will be skipped and cannot be retransmitted. To fix this, when retransmit_skb_hint is NULL, retransmit_skb_hint can be reset only after all marked lost packets are retransmitted (retrans_out >= lost_out), otherwise we need to traverse from tcp_rtx_queue_head in tcp_xmit_retransmit_queue(). Packetdrill to demonstrate: // Disable RACK and set max_reordering to keep things simple 0 `sysctl -q net.ipv4.tcp_recovery=0` +0 `sysctl -q net.ipv4.tcp_max_reordering=3` // Establish a connection +0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 +0 bind(3, ..., ...) = 0 +0 listen(3, 1) = 0 +.1 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7> +0 > S. 0:0(0) ack 1 <...> +.01 < . 1:1(0) ack 1 win 257 +0 accept(3, ..., ...) = 4 // Send 8 data segments +0 write(4, ..., 8000) = 8000 +0 > P. 1:8001(8000) ack 1 // Enter recovery and 1:3001 is marked lost +.01 < . 1:1(0) ack 1 win 257 <sack 3001:4001,nop,nop> +0 < . 1:1(0) ack 1 win 257 <sack 5001:6001 3001:4001,nop,nop> +0 < . 1:1(0) ack 1 win 257 <sack 5001:7001 3001:4001,nop,nop> // Retransmit 1:1001, now retransmit_skb_hint points to 1001:2001 +0 > . 1:1001(1000) ack 1 // 1001:2001 was ACKed causing retransmit_skb_hint to be set to NULL +.01 < . 1:1(0) ack 2001 win 257 <sack 5001:8001 3001:4001,nop,nop> // Now retransmit_skb_hint points to 4001:5001 which is now marked lost // BUG: 2001:3001 was not retransmitted +0 > . 2001:3001(1000) ack 1 Signed-off-by: Pengcheng Yang <yangpc@wangsu.com> Acked-by: Neal Cardwell <ncardwell@google.com> Tested-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-15xfrm: support output_mark for offload ESP packetsUlrich Weber1-0/+2
Commit 9b42c1f179a6 ("xfrm: Extend the output_mark") added output_mark support but missed ESP offload support. xfrm_smark_get() is not called within xfrm_input() for packets coming from esp4_gro_receive() or esp6_gro_receive(). Therefore call xfrm_smark_get() directly within these functions. Fixes: 9b42c1f179a6 ("xfrm: Extend the output_mark to support input direction and masking.") Signed-off-by: Ulrich Weber <ulrich.weber@gmail.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-01-14ipv4: Add "offload" and "trap" indications to routesIdo Schimmel4-0/+81
When performing L3 offload, routes and nexthops are usually programmed into two different tables in the underlying device. Therefore, the fact that a nexthop resides in hardware does not necessarily mean that all the associated routes also reside in hardware and vice-versa. While the kernel can signal to user space the presence of a nexthop in hardware (via 'RTNH_F_OFFLOAD'), it does not have a corresponding flag for routes. In addition, the fact that a route resides in hardware does not necessarily mean that the traffic is offloaded. For example, unreachable routes (i.e., 'RTN_UNREACHABLE') are programmed to trap packets to the CPU so that the kernel will be able to generate the appropriate ICMP error packet. This patch adds an "offload" and "trap" indications to IPv4 routes, so that users will have better visibility into the offload process. 'struct fib_alias' is extended with two new fields that indicate if the route resides in hardware or not and if it is offloading traffic from the kernel or trapping packets to it. Note that the new fields are added in the 6 bytes hole and therefore the struct still fits in a single cache line [1]. Capable drivers are expected to invoke fib_alias_hw_flags_set() with the route's key in order to set the flags. The indications are dumped to user space via a new flags (i.e., 'RTM_F_OFFLOAD' and 'RTM_F_TRAP') in the 'rtm_flags' field in the ancillary header. v2: * Make use of 'struct fib_rt_info' in fib_alias_hw_flags_set() [1] struct fib_alias { struct hlist_node fa_list; /* 0 16 */ struct fib_info * fa_info; /* 16 8 */ u8 fa_tos; /* 24 1 */ u8 fa_type; /* 25 1 */ u8 fa_state; /* 26 1 */ u8 fa_slen; /* 27 1 */ u32 tb_id; /* 28 4 */ s16 fa_default; /* 32 2 */ u8 offload:1; /* 34: 0 1 */ u8 trap:1; /* 34: 1 1 */ u8 unused:6; /* 34: 2 1 */ /* XXX 5 bytes hole, try to pack */ struct callback_head rcu __attribute__((__aligned__(8))); /* 40 16 */ /* size: 56, cachelines: 1, members: 12 */ /* sum members: 50, holes: 1, sum holes: 5 */ /* sum bitfield members: 8 bits (1 bytes) */ /* forced alignments: 1, forced holes: 1, sum forced holes: 5 */ /* last cacheline: 56 bytes */ } __attribute__((__aligned__(8))); Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: David Ahern <dsahern@gmail.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-14ipv4: Encapsulate function arguments in a structIdo Schimmel4-21/+36
fib_dump_info() is used to prepare RTM_{NEW,DEL}ROUTE netlink messages using the passed arguments. Currently, the function takes 11 arguments, 6 of which are attributes of the route being dumped (e.g., prefix, TOS). The next patch will need the function to also dump to user space an indication if the route is present in hardware or not. Instead of passing yet another argument, change the function to take a struct containing the different route attributes. v2: * Name last argument of fib_dump_info() * Move 'struct fib_rt_info' to include/net/ip_fib.h so that it could later be passed to fib_alias_hw_flags_set() Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: David Ahern <dsahern@gmail.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-14ipv4: Replace route in list before notifyingIdo Schimmel1-4/+7
Subsequent patches will add an offload / trap indication to routes which will signal if the route is present in hardware or not. After programming the route to the hardware, drivers will have to ask the IPv4 code to set the flags by passing the route's key. In the case of route replace, the new route is notified before it is actually inserted into the FIB alias list. This can prevent simple drivers (e.g., netdevsim) that program the route to the hardware in the same context it is notified in from being able to set the flag. Solve this by first inserting the new route to the list and rollback the operation in case the route was vetoed. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-14net: ipv4: use skb_list_walk_safe helper for gso segmentsJason A. Donenfeld1-5/+3
This is a straight-forward conversion case for the new function, keeping the flow of the existing code as intact as possible. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-14net: udp: use skb_list_walk_safe helper for gso segmentsJason A. Donenfeld1-2/+1
This is a straight-forward conversion case for the new function, iterating over the return value from udp_rcv_segment, which actually is a wrapper around skb_gso_segment. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-14vti[6]: fix packet tx through bpf_redirect()Nicolas Dichtel1-2/+11
With an ebpf program that redirects packets through a vti[6] interface, the packets are dropped because no dst is attached. This could also be reproduced with an AF_PACKET socket, with the following python script (vti1 is an ip_vti interface): import socket send_s = socket.socket(socket.AF_PACKET, socket.SOCK_RAW, 0) # scapy # p = IP(src='10.100.0.2', dst='10.200.0.1')/ICMP(type='echo-request') # raw(p) req = b'E\x00\x00\x1c\x00\x01\x00\x00@\x01e\xb2\nd\x00\x02\n\xc8\x00\x01\x08\x00\xf7\xff\x00\x00\x00\x00' send_s.sendto(req, ('vti1', 0x800, 0, 0)) Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2020-01-13netfilter: arp_tables: init netns pointer in xt_tgdtor_param structFlorian Westphal1-9/+10
An earlier commit (1b789577f655060d98d20e, "netfilter: arp_tables: init netns pointer in xt_tgchk_param struct") fixed missing net initialization for arptables, but turns out it was incomplete. We can get a very similar struct net NULL deref during error unwinding: general protection fault: 0000 [#1] PREEMPT SMP KASAN RIP: 0010:xt_rateest_put+0xa1/0x440 net/netfilter/xt_RATEEST.c:77 xt_rateest_tg_destroy+0x72/0xa0 net/netfilter/xt_RATEEST.c:175 cleanup_entry net/ipv4/netfilter/arp_tables.c:509 [inline] translate_table+0x11f4/0x1d80 net/ipv4/netfilter/arp_tables.c:587 do_replace net/ipv4/netfilter/arp_tables.c:981 [inline] do_arpt_set_ctl+0x317/0x650 net/ipv4/netfilter/arp_tables.c:1461 Also init the netns pointer in xt_tgdtor_param struct. Fixes: add67461240c1d ("netfilter: add struct net * to target parameters") Reported-by: syzbot+91bdd8eece0f6629ec8b@syzkaller.appspotmail.com Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-01-10ipv4: Detect rollover in specific fib table dumpDavid Ahern1-0/+6
Sven-Haegar reported looping on fib dumps when 255.255.255.255 route has been added to a table. The looping is caused by the key rolling over from FFFFFFFF to 0. When dumping a specific table only, we need a means to detect when the table dump is done. The key and count saved to cb args are both 0 only at the start of the table dump. If key is 0 and count > 0, then we are in the rollover case. Detect and return to avoid looping. This only affects dumps of a specific table; for dumps of all tables (the case prior to the change in the Fixes tag) inet_dump_fib moved the entry counter to the next table and reset the cb args used by fib_table_dump and fn_trie_dump_leaf, so the rollover ffffffff back to 0 did not cause looping with the dumps. Fixes: effe67926624 ("net: Enable kernel side filtering of route dumps") Reported-by: Sven-Haegar Koch <haegar@sdinet.de> Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-09tcp: Check for filled TCP option space before SACKMat Martineau1-3/+7
Update the SACK check to work with zero option space available, a case that's possible with MPTCP but not MD5+TS. Maintained only one conditional branch for insufficient SACK space. v1 -> v2: - Moves the check inside the SACK branch by taking recent SACK fix: 9424e2e7ad93 (tcp: md5: fix potential overestimation of TCP option space) in to account, but modifies it to work in MPTCP scenarios beyond the MD5+TS corner case. Co-developed-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-09tcp: Export TCP functions and ops structMat Martineau2-4/+4
MPTCP will make use of tcp_send_mss() and tcp_push() when sending data to specific TCP subflows. tcp_request_sock_ipvX_ops and ipvX_specific will be referenced during TCP subflow creation. Co-developed-by: Peter Krystad <peter.krystad@linux.intel.com> Signed-off-by: Peter Krystad <peter.krystad@linux.intel.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-09tcp: coalesce/collapse must respect MPTCP extensionsMat Martineau2-4/+9
Coalesce and collapse of packets carrying MPTCP extensions is allowed when the newer packet has no extension or the extensions carried by both packets are equal. This allows merging of TSO packet trains and even cross-TSO packets, and does not require any additional action when moving data into existing SKBs. v3 -> v4: - allow collapsing, under mptcp_skb_can_collapse() constraint v5 -> v6: - clarify MPTCP skb extensions must always be cleared at allocation time Co-developed-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-09tcp, ulp: Add clone operation to tcp_ulp_opsMat Martineau1-0/+14
If ULP is used on a listening socket, icsk_ulp_ops and icsk_ulp_data are copied when the listener is cloned. Sometimes the clone is immediately deleted, which will invoke the release op on the clone and likely corrupt the listening socket's icsk_ulp_data. The clone operation is invoked immediately after the clone is copied and gives the ULP type an opportunity to set up the clone socket and its icsk_ulp_data. The MPTCP ULP clone will silently fallback to plain TCP on allocation failure, so 'clone()' does not need to return an error code. v6 -> v7: - move and rename ulp clone helper to make it inline-friendly v5 -> v6: - clarified MPTCP clone usage in commit message Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-09bpf/sockmap: Read psock ingress_msg before sk_receive_queueLingpeng Chen1-6/+6
Right now in tcp_bpf_recvmsg, sock read data first from sk_receive_queue if not empty than psock->ingress_msg otherwise. If a FIN packet arrives and there's also some data in psock->ingress_msg, the data in psock->ingress_msg will be purged. It is always happen when request to a HTTP1.0 server like python SimpleHTTPServer since the server send FIN packet after data is sent out. Fixes: 604326b41a6fb ("bpf, sockmap: convert to generic sk_msg interface") Reported-by: Arika Chen <eaglesora@gmail.com> Suggested-by: Arika Chen <eaglesora@gmail.com> Signed-off-by: Lingpeng Chen <forrest0579@gmail.com> Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20200109014833.18951-1-forrest0579@gmail.com
2020-01-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller2-12/+20
The ungrafting from PRIO bug fixes in net, when merged into net-next, merge cleanly but create a build failure. The resolution used here is from Petr Machata. Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-09bpf: Add BPF_FUNC_tcp_send_ack helperMartin KaFai Lau1-1/+23
Add a helper to send out a tcp-ack. It will be used in the later bpf_dctcp implementation that requires to send out an ack when the CE state changed. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20200109004551.3900448-1-kafai@fb.com
2020-01-09bpf: tcp: Support tcp_congestion_ops in bpfMartin KaFai Lau6-14/+250
This patch makes "struct tcp_congestion_ops" to be the first user of BPF STRUCT_OPS. It allows implementing a tcp_congestion_ops in bpf. The BPF implemented tcp_congestion_ops can be used like regular kernel tcp-cc through sysctl and setsockopt. e.g. [root@arch-fb-vm1 bpf]# sysctl -a | egrep congestion net.ipv4.tcp_allowed_congestion_control = reno cubic bpf_cubic net.ipv4.tcp_available_congestion_control = reno bic cubic bpf_cubic net.ipv4.tcp_congestion_control = bpf_cubic There has been attempt to move the TCP CC to the user space (e.g. CCP in TCP). The common arguments are faster turn around, get away from long-tail kernel versions in production...etc, which are legit points. BPF has been the continuous effort to join both kernel and userspace upsides together (e.g. XDP to gain the performance advantage without bypassing the kernel). The recent BPF advancements (in particular BTF-aware verifier, BPF trampoline, BPF CO-RE...) made implementing kernel struct ops (e.g. tcp cc) possible in BPF. It allows a faster turnaround for testing algorithm in the production while leveraging the existing (and continue growing) BPF feature/framework instead of building one specifically for userspace TCP CC. This patch allows write access to a few fields in tcp-sock (in bpf_tcp_ca_btf_struct_access()). The optional "get_info" is unsupported now. It can be added later. One possible way is to output the info with a btf-id to describe the content. Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20200109003508.3856115-1-kafai@fb.com
2020-01-08Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nfDavid S. Miller1-11/+16
Pablo Neira Ayuso says: ==================== Netfilter fixes for net The following patchset contains Netfilter fixes for net: 1) Missing netns context in arp_tables, from Florian Westphal. 2) Underflow in flowtable reference counter, from wenxu. 3) Fix incorrect ethernet destination address in flowtable offload, from wenxu. 4) Check for status of neighbour entry, from wenxu. 5) Fix NAT port mangling, from wenxu. 6) Unbind callbacks from destroy path to cleanup hardware properly on flowtable removal. 7) Fix missing casting statistics timestamp, add nf_flowtable_time_stamp and use it. 8) NULL pointer exception when timeout argument is null in conntrack dccp and sctp protocol helpers, from Florian Westphal. 9) Possible nul-dereference in ipset with IPSET_ATTR_LINENO, also from Florian. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-03net: remove the check argument from __skb_gro_checksum_convertLi RongQing2-2/+2
The argument is always ignored, so remove it. Signed-off-by: Li RongQing <lirongqing@baidu.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-02tcp: use REXMIT_NEW instead of magic numberMao Wenan1-1/+1
REXMIT_NEW is a macro for "FRTO-style transmit of unsent/new packets", this patch makes it more readable. Signed-off-by: Mao Wenan <maowenan@huawei.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-02net: Add device index to tcp_md5sigDavid Ahern1-0/+18
Add support for userspace to specify a device index to limit the scope of an entry via the TCP_MD5SIG_EXT setsockopt. The existing __tcpm_pad is renamed to tcpm_ifindex and the new field is only checked if the new TCP_MD5SIG_FLAG_IFINDEX is set in tcpm_flags. For now, the device index must point to an L3 master device (e.g., VRF). The API and error handling are setup to allow the constraint to be relaxed in the future to any device index. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-02tcp: Add l3index to tcp_md5sig_key and md5 functionsDavid Ahern1-20/+48
Add l3index to tcp_md5sig_key to represent the L3 domain of a key, and add l3index to tcp_md5_do_add and tcp_md5_do_del to fill in the key. With the key now based on an l3index, add the new parameter to the lookup functions and consider the l3index when looking for a match. The l3index comes from the skb when processing ingress packets leveraging the helpers created for socket lookups, tcp_v4_sdif and inet_iif (and the v6 variants). When the sdif index is set it means the packet ingressed a device that is part of an L3 domain and inet_iif points to the VRF device. For egress, the L3 domain is determined from the socket binding and sk_bound_dev_if. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-02ipv4/tcp: Pass dif and sdif to tcp_v4_inbound_md5_hashDavid Ahern1-5/+8
The original ingress device index is saved to the cb space of the skb and the cb is moved during tcp processing. Since tcp_v4_inbound_md5_hash can be called before and after the cb move, pass dif and sdif to it so the caller can save both prior to the cb move. Both are used by a later patch. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-02ipv4/tcp: Use local variable for tcp_md5_addrDavid Ahern1-17/+26
Extract the typecast to (union tcp_md5_addr *) to a local variable rather than the current long, inline declaration with function calls. No functional change intended. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-01-02tcp: fix "old stuff" D-SACK causing SACK to be treated as D-SACKPengcheng Yang1-1/+4
When we receive a D-SACK, where the sequence number satisfies: undo_marker <= start_seq < end_seq <= prior_snd_una we consider this is a valid D-SACK and tcp_is_sackblock_valid() returns true, then this D-SACK is discarded as "old stuff", but the variable first_sack_index is not marked as negative in tcp_sacktag_write_queue(). If this D-SACK also carries a SACK that needs to be processed (for example, the previous SACK segment was lost), this SACK will be treated as a D-SACK in the following processing of tcp_sacktag_write_queue(), which will eventually lead to incorrect updates of undo_retrans and reordering. Fixes: fd6dad616d4f ("[TCP]: Earlier SACK block verification & simplify access to them") Signed-off-by: Pengcheng Yang <yangpc@wangsu.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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