1. 22 Sep, 2020 12 commits
  2. 18 Sep, 2020 2 commits
  3. 17 Sep, 2020 11 commits
    • David S. Miller's avatar
      Merge branch 'net-phy-Unbind-fixes' · 0dfdbc74
      David S. Miller authored
      Florian Fainelli says:
      
      ====================
      net: phy: Unbind fixes
      
      This patch series fixes a couple of issues with the unbinding of the PHY
      drivers and then bringing down a network interface. The first is a NULL
      pointer de-reference and the second was an incorrect warning being
      triggered.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0dfdbc74
    • Florian Fainelli's avatar
      net: phy: Do not warn in phy_stop() on PHY_DOWN · 5116a8ad
      Florian Fainelli authored
      When phy_is_started() was added to catch incorrect PHY states,
      phy_stop() would not be qualified against PHY_DOWN. It is possible to
      reach that state when the PHY driver has been unbound and the network
      device is then brought down.
      
      Fixes: 2b3e88ea ("net: phy: improve phy state checking")
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5116a8ad
    • Florian Fainelli's avatar
      net: phy: Avoid NPD upon phy_detach() when driver is unbound · c2b727df
      Florian Fainelli authored
      If we have unbound the PHY driver prior to calling phy_detach() (often
      via phy_disconnect()) then we can cause a NULL pointer de-reference
      accessing the driver owner member. The steps to reproduce are:
      
      echo unimac-mdio-0:01 > /sys/class/net/eth0/phydev/driver/unbind
      ip link set eth0 down
      
      Fixes: cafe8df8 ("net: phy: Fix lack of reference count on PHY driver")
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c2b727df
    • Michal Kubecek's avatar
      ethtool: add and use message type for tunnel info reply · 19a83d36
      Michal Kubecek authored
      Tunnel offload info code uses ETHTOOL_MSG_TUNNEL_INFO_GET message type (cmd
      field in genetlink header) for replies to tunnel info netlink request, i.e.
      the same value as the request have. This is a problem because we are using
      two separate enums for userspace to kernel and kernel to userspace message
      types so that this ETHTOOL_MSG_TUNNEL_INFO_GET (28) collides with
      ETHTOOL_MSG_CABLE_TEST_TDR_NTF which is what message type 28 means for
      kernel to userspace messages.
      
      As the tunnel info request reached mainline in 5.9 merge window, we should
      still be able to fix the reply message type without breaking backward
      compatibility.
      
      Fixes: c7d759eb ("ethtool: add tunnel info interface")
      Signed-off-by: default avatarMichal Kubecek <mkubecek@suse.cz>
      Reviewed-by: default avatarJakub Kicinski <kuba@kernel.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      19a83d36
    • Xie He's avatar
      drivers/net/wan/hdlc: Set skb->protocol before transmitting · 9fb030a7
      Xie He authored
      This patch sets skb->protocol before transmitting frames on the HDLC
      device, so that a user listening on the HDLC device with an AF_PACKET
      socket will see outgoing frames' sll_protocol field correctly set and
      consistent with that of incoming frames.
      
      1. Control frames in hdlc_cisco and hdlc_ppp
      
      When these drivers send control frames, skb->protocol is not set.
      
      This value should be set to htons(ETH_P_HDLC), because when receiving
      control frames, their skb->protocol is set to htons(ETH_P_HDLC).
      
      When receiving, hdlc_type_trans in hdlc.h is called, which then calls
      cisco_type_trans or ppp_type_trans. The skb->protocol of control frames
      is set to htons(ETH_P_HDLC) so that the control frames can be received
      by hdlc_rcv in hdlc.c, which calls cisco_rx or ppp_rx to process the
      control frames.
      
      2. hdlc_fr
      
      When this driver sends control frames, skb->protocol is set to internal
      values used in this driver.
      
      When this driver sends data frames (from upper stacked PVC devices),
      skb->protocol is the same as that of the user data packet being sent on
      the upper PVC device (for normal PVC devices), or is htons(ETH_P_802_3)
      (for Ethernet-emulating PVC devices).
      
      However, skb->protocol for both control frames and data frames should be
      set to htons(ETH_P_HDLC), because when receiving, all frames received on
      the HDLC device will have their skb->protocol set to htons(ETH_P_HDLC).
      
      When receiving, hdlc_type_trans in hdlc.h is called, and because this
      driver doesn't provide a type_trans function in struct hdlc_proto,
      all frames will have their skb->protocol set to htons(ETH_P_HDLC).
      The frames are then received by hdlc_rcv in hdlc.c, which calls fr_rx
      to process the frames (control frames are consumed and data frames
      are re-received on upper PVC devices).
      
      Cc: Krzysztof Halasa <khc@pm.waw.pl>
      Signed-off-by: default avatarXie He <xie.he.0141@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9fb030a7
    • Xie He's avatar
      drivers/net/wan/lapbether: Make skb->protocol consistent with the header · 83f9a9c8
      Xie He authored
      This driver is a virtual driver stacked on top of Ethernet interfaces.
      
      When this driver transmits data on the Ethernet device, the skb->protocol
      setting is inconsistent with the Ethernet header prepended to the skb.
      
      This causes a user listening on the Ethernet interface with an AF_PACKET
      socket, to see different sll_protocol values for incoming and outgoing
      frames, because incoming frames would have this value set by parsing the
      Ethernet header.
      
      This patch changes the skb->protocol value for outgoing Ethernet frames,
      making it consistent with the Ethernet header prepended. This makes a
      user listening on the Ethernet device with an AF_PACKET socket, to see
      the same sll_protocol value for incoming and outgoing frames.
      
      Cc: Martin Schiller <ms@dev.tdt.de>
      Signed-off-by: default avatarXie He <xie.he.0141@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      83f9a9c8
    • Raju Rangoju's avatar
      cxgb4: fix memory leak during module unload · f4a26a9b
      Raju Rangoju authored
      Fix the memory leak in mps during module unload
      path by freeing mps reference entries if the list
      adpter->mps_ref is not already empty
      
      Fixes: 28b38705 ("cxgb4: Re-work the logic for mps refcounting")
      Signed-off-by: default avatarRaju Rangoju <rajur@chelsio.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f4a26a9b
    • Andres Beltran's avatar
      hv_netvsc: Add validation for untrusted Hyper-V values · 44144185
      Andres Beltran authored
      For additional robustness in the face of Hyper-V errors or malicious
      behavior, validate all values that originate from packets that Hyper-V
      has sent to the guest in the host-to-guest ring buffer. Ensure that
      invalid values cannot cause indexing off the end of an array, or
      subvert an existing validation via integer overflow. Ensure that
      outgoing packets do not have any leftover guest memory that has not
      been zeroed out.
      Signed-off-by: default avatarAndres Beltran <lkmlabelt@gmail.com>
      Co-developed-by: default avatarAndrea Parri (Microsoft) <parri.andrea@gmail.com>
      Signed-off-by: default avatarAndrea Parri (Microsoft) <parri.andrea@gmail.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Jakub Kicinski <kuba@kernel.org>
      Cc: netdev@vger.kernel.org
      Reviewed-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      44144185
    • Matthias Schiffer's avatar
      net: dsa: microchip: ksz8795: really set the correct number of ports · fd944dc2
      Matthias Schiffer authored
      The KSZ9477 and KSZ8795 use the port_cnt field differently: For the
      KSZ9477, it includes the CPU port(s), while for the KSZ8795, it doesn't.
      
      It would be a good cleanup to make the handling of both drivers match,
      but as a first step, fix the recently broken assignment of num_ports in
      the KSZ8795 driver (which completely broke probing, as the CPU port
      index was always failing the num_ports check).
      
      Fixes: af199a1a ("net: dsa: microchip: set the correct number of ports")
      Signed-off-by: default avatarMatthias Schiffer <matthias.schiffer@ew.tq-group.com>
      Reviewed-by: default avatarCodrin Ciubotariu <codrin.ciubotariu@microchip.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      fd944dc2
    • Mark Gray's avatar
      geneve: add transport ports in route lookup for geneve · 34beb215
      Mark Gray authored
      This patch adds transport ports information for route lookup so that
      IPsec can select Geneve tunnel traffic to do encryption. This is
      needed for OVS/OVN IPsec with encrypted Geneve tunnels.
      
      This can be tested by configuring a host-host VPN using an IKE
      daemon and specifying port numbers. For example, for an
      Openswan-type configuration, the following parameters should be
      configured on both hosts and IPsec set up as-per normal:
      
      $ cat /etc/ipsec.conf
      
      conn in
      ...
      left=$IP1
      right=$IP2
      ...
      leftprotoport=udp/6081
      rightprotoport=udp
      ...
      conn out
      ...
      left=$IP1
      right=$IP2
      ...
      leftprotoport=udp
      rightprotoport=udp/6081
      ...
      
      The tunnel can then be setup using "ip" on both hosts (but
      changing the relevant IP addresses):
      
      $ ip link add tun type geneve id 1000 remote $IP2
      $ ip addr add 192.168.0.1/24 dev tun
      $ ip link set tun up
      
      This can then be tested by pinging from $IP1:
      
      $ ping 192.168.0.2
      
      Without this patch the traffic is unencrypted on the wire.
      
      Fixes: 2d07dc79 ("geneve: add initial netdev driver for GENEVE tunnels")
      Signed-off-by: default avatarQiuyu Xiao <qiuyu.xiao.qyx@gmail.com>
      Signed-off-by: default avatarMark Gray <mark.d.gray@redhat.com>
      Reviewed-by: default avatarGreg Rose <gvrose8192@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      34beb215
    • Lu Wei's avatar
      net: hns: kerneldoc fixes · 5f1ab0f4
      Lu Wei authored
      Fix some parameter description or spelling mistakes.
      Signed-off-by: default avatarLu Wei <luwei32@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5f1ab0f4
  4. 16 Sep, 2020 3 commits
    • David S. Miller's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf · d5d325ea
      David S. Miller authored
      Alexei Starovoitov says:
      
      ====================
      pull-request: bpf 2020-09-15
      
      The following pull-request contains BPF updates for your *net* tree.
      
      We've added 12 non-merge commits during the last 19 day(s) which contain
      a total of 10 files changed, 47 insertions(+), 38 deletions(-).
      
      The main changes are:
      
      1) docs/bpf fixes, from Andrii.
      
      2) ld_abs fix, from Daniel.
      
      3) socket casting helpers fix, from Martin.
      
      4) hash iterator fixes, from Yonghong.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d5d325ea
    • Yonghong Song's avatar
      bpf: Fix a rcu warning for bpffs map pretty-print · ce880cb8
      Yonghong Song authored
      Running selftest
        ./btf_btf -p
      the kernel had the following warning:
        [   51.528185] WARNING: CPU: 3 PID: 1756 at kernel/bpf/hashtab.c:717 htab_map_get_next_key+0x2eb/0x300
        [   51.529217] Modules linked in:
        [   51.529583] CPU: 3 PID: 1756 Comm: test_btf Not tainted 5.9.0-rc1+ #878
        [   51.530346] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-1.el7.centos 04/01/2014
        [   51.531410] RIP: 0010:htab_map_get_next_key+0x2eb/0x300
        ...
        [   51.542826] Call Trace:
        [   51.543119]  map_seq_next+0x53/0x80
        [   51.543528]  seq_read+0x263/0x400
        [   51.543932]  vfs_read+0xad/0x1c0
        [   51.544311]  ksys_read+0x5f/0xe0
        [   51.544689]  do_syscall_64+0x33/0x40
        [   51.545116]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
      
      The related source code in kernel/bpf/hashtab.c:
        709 static int htab_map_get_next_key(struct bpf_map *map, void *key, void *next_key)
        710 {
        711         struct bpf_htab *htab = container_of(map, struct bpf_htab, map);
        712         struct hlist_nulls_head *head;
        713         struct htab_elem *l, *next_l;
        714         u32 hash, key_size;
        715         int i = 0;
        716
        717         WARN_ON_ONCE(!rcu_read_lock_held());
      
      In kernel/bpf/inode.c, bpffs map pretty print calls map->ops->map_get_next_key()
      without holding a rcu_read_lock(), hence causing the above warning.
      To fix the issue, just surrounding map->ops->map_get_next_key() with rcu read lock.
      
      Fixes: a26ca7c9 ("bpf: btf: Add pretty print support to the basic arraymap")
      Reported-by: default avatarAlexei Starovoitov <ast@kernel.org>
      Signed-off-by: default avatarYonghong Song <yhs@fb.com>
      Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
      Acked-by: default avatarAndrii Nakryiko <andriin@fb.com>
      Cc: Martin KaFai Lau <kafai@fb.com>
      Link: https://lore.kernel.org/bpf/20200916004401.146277-1-yhs@fb.com
      ce880cb8
    • Martin KaFai Lau's avatar
      bpf: Bpf_skc_to_* casting helpers require a NULL check on sk · 8c33dadc
      Martin KaFai Lau authored
      The bpf_skc_to_* type casting helpers are available to
      BPF_PROG_TYPE_TRACING.  The traced PTR_TO_BTF_ID may be NULL.
      For example, the skb->sk may be NULL.  Thus, these casting helpers
      need to check "!sk" also and this patch fixes them.
      
      Fixes: 0d4fad3e ("bpf: Add bpf_skc_to_udp6_sock() helper")
      Fixes: 478cfbdf ("bpf: Add bpf_skc_to_{tcp, tcp_timewait, tcp_request}_sock() helpers")
      Fixes: af7ec138 ("bpf: Add bpf_skc_to_tcp6_sock() helper")
      Signed-off-by: default avatarMartin KaFai Lau <kafai@fb.com>
      Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
      Acked-by: default avatarYonghong Song <yhs@fb.com>
      Acked-by: default avatarSong Liu <songliubraving@fb.com>
      Link: https://lore.kernel.org/bpf/20200915182959.241101-1-kafai@fb.com
      8c33dadc
  5. 15 Sep, 2020 5 commits
    • David Ahern's avatar
      ipv4: Update exception handling for multipath routes via same device · 2fbc6e89
      David Ahern authored
      Kfir reported that pmtu exceptions are not created properly for
      deployments where multipath routes use the same device.
      
      After some digging I see 2 compounding problems:
      1. ip_route_output_key_hash_rcu is updating the flowi4_oif *after*
         the route lookup. This is the second use case where this has
         been a problem (the first is related to use of vti devices with
         VRF). I can not find any reason for the oif to be changed after the
         lookup; the code goes back to the start of git. It does not seem
         logical so remove it.
      
      2. fib_lookups for exceptions do not call fib_select_path to handle
         multipath route selection based on the hash.
      
      The end result is that the fib_lookup used to add the exception
      always creates it based using the first leg of the route.
      
      An example topology showing the problem:
      
                       |  host1
                   +------+
                   | eth0 |  .209
                   +------+
                       |
                   +------+
           switch  | br0  |
                   +------+
                       |
             +---------+---------+
             | host2             |  host3
         +------+             +------+
         | eth0 | .250        | eth0 | 192.168.252.252
         +------+             +------+
      
         +-----+             +-----+
         | vti | .2          | vti | 192.168.247.3
         +-----+             +-----+
             \                  /
       =================================
       tunnels
               192.168.247.1/24
      
      for h in host1 host2 host3; do
              ip netns add ${h}
              ip -netns ${h} link set lo up
              ip netns exec ${h} sysctl -wq net.ipv4.ip_forward=1
      done
      
      ip netns add switch
      ip -netns switch li set lo up
      ip -netns switch link add br0 type bridge stp 0
      ip -netns switch link set br0 up
      
      for n in 1 2 3; do
              ip -netns switch link add eth-sw type veth peer name eth-h${n}
              ip -netns switch li set eth-h${n} master br0 up
              ip -netns switch li set eth-sw netns host${n} name eth0
      done
      
      ip -netns host1 addr add 192.168.252.209/24 dev eth0
      ip -netns host1 link set dev eth0 up
      ip -netns host1 route add 192.168.247.0/24 \
              nexthop via 192.168.252.250 dev eth0 nexthop via 192.168.252.252 dev eth0
      
      ip -netns host2 addr add 192.168.252.250/24 dev eth0
      ip -netns host2 link set dev eth0 up
      
      ip -netns host2 addr add 192.168.252.252/24 dev eth0
      ip -netns host3 link set dev eth0 up
      
      ip netns add tunnel
      ip -netns tunnel li set lo up
      ip -netns tunnel li add br0 type bridge
      ip -netns tunnel li set br0 up
      for n in $(seq 11 20); do
              ip -netns tunnel addr add dev br0 192.168.247.${n}/24
      done
      
      for n in 2 3
      do
              ip -netns tunnel link add vti${n} type veth peer name eth${n}
              ip -netns tunnel link set eth${n} mtu 1360 master br0 up
              ip -netns tunnel link set vti${n} netns host${n} mtu 1360 up
              ip -netns host${n} addr add dev vti${n} 192.168.247.${n}/24
      done
      ip -netns tunnel ro add default nexthop via 192.168.247.2 nexthop via 192.168.247.3
      
      ip netns exec host1 ping -M do -s 1400 -c3 -I 192.168.252.209 192.168.247.11
      ip netns exec host1 ping -M do -s 1400 -c3 -I 192.168.252.209 192.168.247.15
      ip -netns host1 ro ls cache
      
      Before this patch the cache always shows exceptions against the first
      leg in the multipath route; 192.168.252.250 per this example. Since the
      hash has an initial random seed, you may need to vary the final octet
      more than what is listed. In my tests, using addresses between 11 and 19
      usually found 1 that used both legs.
      
      With this patch, the cache will have exceptions for both legs.
      
      Fixes: 4895c771 ("ipv4: Add FIB nexthop exceptions")
      Reported-by: default avatarKfir Itzhak <mastertheknife@gmail.com>
      Signed-off-by: default avatarDavid Ahern <dsahern@kernel.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2fbc6e89
    • Lu Wei's avatar
      net: tipc: kerneldoc fixes · 2e5117ba
      Lu Wei authored
      Fix parameter description of tipc_link_bc_create()
      Reported-by: default avatarHulk Robot <hulkci@huawei.com>
      Fixes: 16ad3f40 ("tipc: introduce variable window congestion control")
      Signed-off-by: default avatarLu Wei <luwei32@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2e5117ba
    • Dany Madden's avatar
      ibmvnic: update MAINTAINERS · d3f2ef18
      Dany Madden authored
      Update supporters for IBM Power SRIOV Virtual NIC Device Driver.
      Thomas Falcon is moving on to other works. Dany Madden, Lijun Pan
      and Sukadev Bhattiprolu are the current supporters.
      Signed-off-by: default avatarDany Madden <drt@linux.ibm.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d3f2ef18
    • Andrii Nakryiko's avatar
      docs/bpf: Remove source code links · 65dce596
      Andrii Nakryiko authored
      Make path to bench_ringbufs.c just a text, not a special link.
      
      Fixes: 97abb2b3 ("docs/bpf: Add BPF ring buffer design notes")
      Reported-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
      Signed-off-by: default avatarAndrii Nakryiko <andriin@fb.com>
      Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
      Link: https://lore.kernel.org/bpf/20200915005031.2748397-1-andriin@fb.com
      65dce596
    • Björn Töpel's avatar
      xsk: Fix number of pinned pages/umem size discrepancy · 2b1667e5
      Björn Töpel authored
      For AF_XDP sockets, there was a discrepancy between the number of of
      pinned pages and the size of the umem region.
      
      The size of the umem region is used to validate the AF_XDP descriptor
      addresses. The logic that pinned the pages covered by the region only
      took whole pages into consideration, creating a mismatch between the
      size and pinned pages. A user could then pass AF_XDP addresses outside
      the range of pinned pages, but still within the size of the region,
      crashing the kernel.
      
      This change correctly calculates the number of pages to be
      pinned. Further, the size check for the aligned mode is
      simplified. Now the code simply checks if the size is divisible by the
      chunk size.
      
      Fixes: bbff2f32 ("xsk: new descriptor addressing scheme")
      Reported-by: default avatarCiara Loftus <ciara.loftus@intel.com>
      Signed-off-by: default avatarBjörn Töpel <bjorn.topel@intel.com>
      Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
      Tested-by: default avatarCiara Loftus <ciara.loftus@intel.com>
      Acked-by: default avatarSong Liu <songliubraving@fb.com>
      Link: https://lore.kernel.org/bpf/20200910075609.7904-1-bjorn.topel@gmail.com
      2b1667e5
  6. 14 Sep, 2020 7 commits
    • Xin Long's avatar
      net: sched: initialize with 0 before setting erspan md->u · 8e1b3ac4
      Xin Long authored
      In fl_set_erspan_opt(), all bits of erspan md was set 1, as this
      function is also used to set opt MASK. However, when setting for
      md->u.index for opt VALUE, the rest bits of the union md->u will
      be left 1. It would cause to fail the match of the whole md when
      version is 1 and only index is set.
      
      This patch is to fix by initializing with 0 before setting erspan
      md->u.
      Reported-by: default avatarShuang Li <shuali@redhat.com>
      Fixes: 79b1011c ("net: sched: allow flower to match erspan options")
      Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8e1b3ac4
    • David S. Miller's avatar
      Merge branch 'net-improve-vxlan-option-process-in-net_sched-and-lwtunnel' · ad7b27c9
      David S. Miller authored
      Xin Long says:
      
      ====================
      net: improve vxlan option process in net_sched and lwtunnel
      
      This patch is to do some mask when setting vxlan option in net_sched
      and lwtunnel, so that only available bits can be set on vxlan md gbp.
      
      This would help when users don't know exactly vxlan's gbp bits, and
      avoid some mismatch because of some unavailable bits set by users.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ad7b27c9
    • Xin Long's avatar
      lwtunnel: only keep the available bits when setting vxlan md->gbp · 681d2cfb
      Xin Long authored
      As we can see from vxlan_build/parse_gbp_hdr(), when processing metadata
      on vxlan rx/tx path, only dont_learn/policy_applied/policy_id fields can
      be set to or parse from the packet for vxlan gbp option.
      
      So do the mask when set it in lwtunnel, as it does in act_tunnel_key and
      cls_flower.
      Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      681d2cfb
    • Xin Long's avatar
      net: sched: only keep the available bits when setting vxlan md->gbp · 13e6ce98
      Xin Long authored
      As we can see from vxlan_build/parse_gbp_hdr(), when processing metadata
      on vxlan rx/tx path, only dont_learn/policy_applied/policy_id fields can
      be set to or parse from the packet for vxlan gbp option.
      
      So we'd better do the mask when set it in act_tunnel_key and cls_flower.
      Otherwise, when users don't know these bits, they may configure with a
      value which can never be matched.
      Reported-by: default avatarShuang Li <shuali@redhat.com>
      Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      13e6ce98
    • Xin Long's avatar
      tipc: use skb_unshare() instead in tipc_buf_append() · ff48b622
      Xin Long authored
      In tipc_buf_append() it may change skb's frag_list, and it causes
      problems when this skb is cloned. skb_unclone() doesn't really
      make this skb's flag_list available to change.
      
      Shuang Li has reported an use-after-free issue because of this
      when creating quite a few macvlan dev over the same dev, where
      the broadcast packets will be cloned and go up to the stack:
      
       [ ] BUG: KASAN: use-after-free in pskb_expand_head+0x86d/0xea0
       [ ] Call Trace:
       [ ]  dump_stack+0x7c/0xb0
       [ ]  print_address_description.constprop.7+0x1a/0x220
       [ ]  kasan_report.cold.10+0x37/0x7c
       [ ]  check_memory_region+0x183/0x1e0
       [ ]  pskb_expand_head+0x86d/0xea0
       [ ]  process_backlog+0x1df/0x660
       [ ]  net_rx_action+0x3b4/0xc90
       [ ]
       [ ] Allocated by task 1786:
       [ ]  kmem_cache_alloc+0xbf/0x220
       [ ]  skb_clone+0x10a/0x300
       [ ]  macvlan_broadcast+0x2f6/0x590 [macvlan]
       [ ]  macvlan_process_broadcast+0x37c/0x516 [macvlan]
       [ ]  process_one_work+0x66a/0x1060
       [ ]  worker_thread+0x87/0xb10
       [ ]
       [ ] Freed by task 3253:
       [ ]  kmem_cache_free+0x82/0x2a0
       [ ]  skb_release_data+0x2c3/0x6e0
       [ ]  kfree_skb+0x78/0x1d0
       [ ]  tipc_recvmsg+0x3be/0xa40 [tipc]
      
      So fix it by using skb_unshare() instead, which would create a new
      skb for the cloned frag and it'll be safe to change its frag_list.
      The similar things were also done in sctp_make_reassembled_event(),
      which is using skb_copy().
      Reported-by: default avatarShuang Li <shuali@redhat.com>
      Fixes: 37e22164 ("tipc: rename and move message reassembly function")
      Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ff48b622
    • Peilin Ye's avatar
      tipc: Fix memory leak in tipc_group_create_member() · bb3a420d
      Peilin Ye authored
      tipc_group_add_to_tree() returns silently if `key` matches `nkey` of an
      existing node, causing tipc_group_create_member() to leak memory. Let
      tipc_group_add_to_tree() return an error in such a case, so that
      tipc_group_create_member() can handle it properly.
      
      Fixes: 75da2163 ("tipc: introduce communication groups")
      Reported-and-tested-by: syzbot+f95d90c454864b3b5bc9@syzkaller.appspotmail.com
      Cc: Hillf Danton <hdanton@sina.com>
      Link: https://syzkaller.appspot.com/bug?id=048390604fe1b60df34150265479202f10e13affSigned-off-by: default avatarPeilin Ye <yepeilin.cs@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      bb3a420d
    • David Ahern's avatar
      ipv4: Initialize flowi4_multipath_hash in data path · 1869e226
      David Ahern authored
      flowi4_multipath_hash was added by the commit referenced below for
      tunnels. Unfortunately, the patch did not initialize the new field
      for several fast path lookups that do not initialize the entire flow
      struct to 0. Fix those locations. Currently, flowi4_multipath_hash
      is random garbage and affects the hash value computed by
      fib_multipath_hash for multipath selection.
      
      Fixes: 24ba1440 ("route: Add multipath_hash in flowi_common to make user-define hash")
      Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
      Cc: wenxu <wenxu@ucloud.cn>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1869e226