1. 11 May, 2020 2 commits
  2. 10 May, 2020 2 commits
    • Florian Fainelli's avatar
      net: dsa: loop: Add module soft dependency · 3047211c
      Florian Fainelli authored
      There is a soft dependency against dsa_loop_bdinfo.ko which sets up the
      MDIO device registration, since there are no symbols referenced by
      dsa_loop.ko, there is no automatic loading of dsa_loop_bdinfo.ko which
      is needed.
      
      Fixes: 98cd1552 ("net: dsa: Mock-up driver")
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      3047211c
    • Zefan Li's avatar
      netprio_cgroup: Fix unlimited memory leak of v2 cgroups · 090e28b2
      Zefan Li authored
      If systemd is configured to use hybrid mode which enables the use of
      both cgroup v1 and v2, systemd will create new cgroup on both the default
      root (v2) and netprio_cgroup hierarchy (v1) for a new session and attach
      task to the two cgroups. If the task does some network thing then the v2
      cgroup can never be freed after the session exited.
      
      One of our machines ran into OOM due to this memory leak.
      
      In the scenario described above when sk_alloc() is called
      cgroup_sk_alloc() thought it's in v2 mode, so it stores
      the cgroup pointer in sk->sk_cgrp_data and increments
      the cgroup refcnt, but then sock_update_netprioidx()
      thought it's in v1 mode, so it stores netprioidx value
      in sk->sk_cgrp_data, so the cgroup refcnt will never be freed.
      
      Currently we do the mode switch when someone writes to the ifpriomap
      cgroup control file. The easiest fix is to also do the switch when
      a task is attached to a new cgroup.
      
      Fixes: bd1060a1 ("sock, cgroup: add sock->sk_cgroup")
      Reported-by: default avatarYang Yingliang <yangyingliang@huawei.com>
      Tested-by: default avatarYang Yingliang <yangyingliang@huawei.com>
      Signed-off-by: default avatarZefan Li <lizefan@huawei.com>
      Acked-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      090e28b2
  3. 09 May, 2020 8 commits
  4. 08 May, 2020 6 commits
    • Kelly Littlepage's avatar
      net: tcp: fix rx timestamp behavior for tcp_recvmsg · cc4de047
      Kelly Littlepage authored
      The stated intent of the original commit is to is to "return the timestamp
      corresponding to the highest sequence number data returned." The current
      implementation returns the timestamp for the last byte of the last fully
      read skb, which is not necessarily the last byte in the recv buffer. This
      patch converts behavior to the original definition, and to the behavior of
      the previous draft versions of commit 98aaa913 ("tcp: Extend
      SOF_TIMESTAMPING_RX_SOFTWARE to TCP recvmsg") which also match this
      behavior.
      
      Fixes: 98aaa913 ("tcp: Extend SOF_TIMESTAMPING_RX_SOFTWARE to TCP recvmsg")
      Co-developed-by: default avatarIris Liu <iris@onechronos.com>
      Signed-off-by: default avatarIris Liu <iris@onechronos.com>
      Signed-off-by: default avatarKelly Littlepage <kelly@onechronos.com>
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Acked-by: default avatarSoheil Hassas Yeganeh <soheil@google.com>
      Acked-by: default avatarWillem de Bruijn <willemb@google.com>
      Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
      cc4de047
    • Cong Wang's avatar
      net: fix a potential recursive NETDEV_FEAT_CHANGE · dd912306
      Cong Wang authored
      syzbot managed to trigger a recursive NETDEV_FEAT_CHANGE event
      between bonding master and slave. I managed to find a reproducer
      for this:
      
        ip li set bond0 up
        ifenslave bond0 eth0
        brctl addbr br0
        ethtool -K eth0 lro off
        brctl addif br0 bond0
        ip li set br0 up
      
      When a NETDEV_FEAT_CHANGE event is triggered on a bonding slave,
      it captures this and calls bond_compute_features() to fixup its
      master's and other slaves' features. However, when syncing with
      its lower devices by netdev_sync_lower_features() this event is
      triggered again on slaves when the LRO feature fails to change,
      so it goes back and forth recursively until the kernel stack is
      exhausted.
      
      Commit 17b85d29 intentionally lets __netdev_update_features()
      return -1 for such a failure case, so we have to just rely on
      the existing check inside netdev_sync_lower_features() and skip
      NETDEV_FEAT_CHANGE event only for this specific failure case.
      
      Fixes: fd867d51 ("net/core: generic support for disabling netdev features down stack")
      Reported-by: syzbot+e73ceacfd8560cc8a3ca@syzkaller.appspotmail.com
      Reported-by: syzbot+c2fb6f9ddcea95ba49b5@syzkaller.appspotmail.com
      Cc: Jarod Wilson <jarod@redhat.com>
      Cc: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
      Cc: Josh Poimboeuf <jpoimboe@redhat.com>
      Cc: Jann Horn <jannh@google.com>
      Reviewed-by: default avatarJay Vosburgh <jay.vosburgh@canonical.com>
      Signed-off-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
      Acked-by: default avatarNikolay Aleksandrov <nikolay@cumulusnetworks.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      dd912306
    • Paolo Abeni's avatar
      mptcp: set correct vfs info for subflows · 7d14b0d2
      Paolo Abeni authored
      When a subflow is created via mptcp_subflow_create_socket(),
      a new 'struct socket' is allocated, with a new i_ino value.
      
      When inspecting TCP sockets via the procfs and or the diag
      interface, the above ones are not related to the process owning
      the MPTCP master socket, even if they are a logical part of it
      ('ss -p' shows an empty process field)
      
      Additionally, subflows created by the path manager get
      the uid/gid from the running workqueue.
      
      Subflows are part of the owning MPTCP master socket, let's
      adjust the vfs info to reflect this.
      
      After this patch, 'ss' correctly displays subflows as belonging
      to the msk socket creator.
      
      Fixes: 2303f994 ("mptcp: Associate MPTCP context with TCP socket")
      Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7d14b0d2
    • Chuhong Yuan's avatar
      net: microchip: encx24j600: add missed kthread_stop · ff8ce319
      Chuhong Yuan authored
      This driver calls kthread_run() in probe, but forgets to call
      kthread_stop() in probe failure and remove.
      Add the missed kthread_stop() to fix it.
      Signed-off-by: default avatarChuhong Yuan <hslester96@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ff8ce319
    • Maciej Żenczykowski's avatar
      Revert "ipv6: add mtu lock check in __ip6_rt_update_pmtu" · 09454fd0
      Maciej Żenczykowski authored
      This reverts commit 19bda36c:
      
      | ipv6: add mtu lock check in __ip6_rt_update_pmtu
      |
      | Prior to this patch, ipv6 didn't do mtu lock check in ip6_update_pmtu.
      | It leaded to that mtu lock doesn't really work when receiving the pkt
      | of ICMPV6_PKT_TOOBIG.
      |
      | This patch is to add mtu lock check in __ip6_rt_update_pmtu just as ipv4
      | did in __ip_rt_update_pmtu.
      
      The above reasoning is incorrect.  IPv6 *requires* icmp based pmtu to work.
      There's already a comment to this effect elsewhere in the kernel:
      
        $ git grep -p -B1 -A3 'RTAX_MTU lock'
        net/ipv6/route.c=4813=
      
        static int rt6_mtu_change_route(struct fib6_info *f6i, void *p_arg)
        ...
          /* In IPv6 pmtu discovery is not optional,
             so that RTAX_MTU lock cannot disable it.
             We still use this lock to block changes
             caused by addrconf/ndisc.
          */
      
      This reverts to the pre-4.9 behaviour.
      
      Cc: Eric Dumazet <edumazet@google.com>
      Cc: Willem de Bruijn <willemb@google.com>
      Cc: Xin Long <lucien.xin@gmail.com>
      Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
      Signed-off-by: default avatarMaciej Żenczykowski <maze@google.com>
      Fixes: 19bda36c ("ipv6: add mtu lock check in __ip6_rt_update_pmtu")
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      09454fd0
    • Arnd Bergmann's avatar
      net: bareudp: avoid uninitialized variable warning · ee287556
      Arnd Bergmann authored
      clang points out that building without IPv6 would lead to returning
      an uninitialized variable if a packet with family!=AF_INET is
      passed into bareudp_udp_encap_recv():
      
      drivers/net/bareudp.c:139:6: error: variable 'err' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized]
              if (family == AF_INET)
                  ^~~~~~~~~~~~~~~~~
      drivers/net/bareudp.c:146:15: note: uninitialized use occurs here
              if (unlikely(err)) {
                           ^~~
      include/linux/compiler.h:78:42: note: expanded from macro 'unlikely'
       # define unlikely(x)    __builtin_expect(!!(x), 0)
                                                  ^
      drivers/net/bareudp.c:139:2: note: remove the 'if' if its condition is always true
              if (family == AF_INET)
              ^~~~~~~~~~~~~~~~~~~~~~
      
      This cannot happen in practice, so change the condition in a way that
      gcc sees the IPv4 case as unconditionally true here.
      For consistency, change all the similar constructs in this file the
      same way, using "if(IS_ENABLED())" instead of #if IS_ENABLED()".
      
      Fixes: 571912c6 ("net: UDP tunnel encapsulation module for tunnelling different protocols like MPLS, IP, NSH etc.")
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Reviewed-by: default avatarNathan Chancellor <natechancellor@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ee287556
  5. 07 May, 2020 22 commits
    • Geert Uytterhoeven's avatar
      net: hisilicon: Make CONFIG_HNS invisible · 8aef1994
      Geert Uytterhoeven authored
      The HNS config symbol enables the framework support for the Hisilicon
      Network Subsystem.  It is already selected by all of its users, so there
      is no reason to make it visible.
      Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8aef1994
    • Oliver Neukum's avatar
      usb: hso: correct debug message · 1a10186e
      Oliver Neukum authored
      If you do not find the OUT endpoint, you should say so,
      rather than copy the error message for the IN endpoint.
      Presumably a copy and paste error.
      Signed-off-by: default avatarOliver Neukum <oneukum@suse.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1a10186e
    • Maciej Żenczykowski's avatar
      net: remove spurious declaration of tcp_default_init_rwnd() · 64082b67
      Maciej Żenczykowski authored
      it doesn't actually exist...
      
      Test: builds and 'git grep tcp_default_init_rwnd' comes up empty
      Signed-off-by: default avatarMaciej Żenczykowski <maze@google.com>
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      64082b67
    • Michael S. Tsirkin's avatar
      virtio_net: fix lockdep warning on 32 bit · 01c32598
      Michael S. Tsirkin authored
      When we fill up a receive VQ, try_fill_recv currently tries to count
      kicks using a 64 bit stats counter. Turns out, on a 32 bit kernel that
      uses a seqcount. sequence counts are "lock" constructs where you need to
      make sure that writers are serialized.
      
      In turn, this means that we mustn't run two try_fill_recv concurrently.
      Which of course we don't. We do run try_fill_recv sometimes from a
      softirq napi context, and sometimes from a fully preemptible context,
      but the later always runs with napi disabled.
      
      However, when it comes to the seqcount, lockdep is trying to enforce the
      rule that the same lock isn't accessed from preemptible and softirq
      context - it doesn't know about napi being enabled/disabled. This causes
      a false-positive warning:
      
      WARNING: inconsistent lock state
      ...
      inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
      
      As a work around, shut down the warning by switching
      to u64_stats_update_begin_irqsave - that works by disabling
      interrupts on 32 bit only, is a NOP on 64 bit.
      Reported-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Suggested-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      01c32598
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net · a811c1fa
      Linus Torvalds authored
      Pull networking fixes from David Miller:
      
       1) Fix reference count leaks in various parts of batman-adv, from Xiyu
          Yang.
      
       2) Update NAT checksum even when it is zero, from Guillaume Nault.
      
       3) sk_psock reference count leak in tls code, also from Xiyu Yang.
      
       4) Sanity check TCA_FQ_CODEL_DROP_BATCH_SIZE netlink attribute in
          fq_codel, from Eric Dumazet.
      
       5) Fix panic in choke_reset(), also from Eric Dumazet.
      
       6) Fix VLAN accel handling in bnxt_fix_features(), from Michael Chan.
      
       7) Disallow out of range quantum values in sch_sfq, from Eric Dumazet.
      
       8) Fix crash in x25_disconnect(), from Yue Haibing.
      
       9) Don't pass pointer to local variable back to the caller in
          nf_osf_hdr_ctx_init(), from Arnd Bergmann.
      
      10) Wireguard should use the ECN decap helper functions, from Toke
          Høiland-Jørgensen.
      
      11) Fix command entry leak in mlx5 driver, from Moshe Shemesh.
      
      12) Fix uninitialized variable access in mptcp's
          subflow_syn_recv_sock(), from Paolo Abeni.
      
      13) Fix unnecessary out-of-order ingress frame ordering in macsec, from
          Scott Dial.
      
      14) IPv6 needs to use a global serial number for dst validation just
          like ipv4, from David Ahern.
      
      15) Fix up PTP_1588_CLOCK deps, from Clay McClure.
      
      16) Missing NLM_F_MULTI flag in gtp driver netlink messages, from
          Yoshiyuki Kurauchi.
      
      17) Fix a regression in that dsa user port errors should not be fatal,
          from Florian Fainelli.
      
      18) Fix iomap leak in enetc driver, from Dejin Zheng.
      
      19) Fix use after free in lec_arp_clear_vccs(), from Cong Wang.
      
      20) Initialize protocol value earlier in neigh code paths when
          generating events, from Roman Mashak.
      
      21) netdev_update_features() must be called with RTNL mutex in macsec
          driver, from Antoine Tenart.
      
      22) Validate untrusted GSO packets even more strictly, from Willem de
          Bruijn.
      
      23) Wireguard decrypt worker needs a cond_resched(), from Jason
          Donenfeld.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (111 commits)
        net: flow_offload: skip hw stats check for FLOW_ACTION_HW_STATS_DONT_CARE
        MAINTAINERS: put DYNAMIC INTERRUPT MODERATION in proper order
        wireguard: send/receive: use explicit unlikely branch instead of implicit coalescing
        wireguard: selftests: initalize ipv6 members to NULL to squelch clang warning
        wireguard: send/receive: cond_resched() when processing worker ringbuffers
        wireguard: socket: remove errant restriction on looping to self
        wireguard: selftests: use normal kernel stack size on ppc64
        net: ethernet: ti: am65-cpsw-nuss: fix irqs type
        ionic: Use debugfs_create_bool() to export bool
        net: dsa: Do not leave DSA master with NULL netdev_ops
        net: dsa: remove duplicate assignment in dsa_slave_add_cls_matchall_mirred
        net: stricter validation of untrusted gso packets
        seg6: fix SRH processing to comply with RFC8754
        net: mscc: ocelot: ANA_AUTOAGE_AGE_PERIOD holds a value in seconds, not ms
        net: dsa: ocelot: the MAC table on Felix is twice as large
        net: dsa: sja1105: the PTP_CLK extts input reacts on both edges
        selftests: net: tcp_mmap: fix SO_RCVLOWAT setting
        net: hsr: fix incorrect type usage for protocol variable
        net: macsec: fix rtnl locking issue
        net: mvpp2: cls: Prevent buffer overflow in mvpp2_ethtool_cls_rule_del()
        ...
      a811c1fa
    • Pablo Neira Ayuso's avatar
      net: flow_offload: skip hw stats check for FLOW_ACTION_HW_STATS_DONT_CARE · 16f80360
      Pablo Neira Ayuso authored
      This patch adds FLOW_ACTION_HW_STATS_DONT_CARE which tells the driver
      that the frontend does not need counters, this hw stats type request
      never fails. The FLOW_ACTION_HW_STATS_DISABLED type explicitly requests
      the driver to disable the stats, however, if the driver cannot disable
      counters, it bails out.
      
      TCA_ACT_HW_STATS_* maintains the 1:1 mapping with FLOW_ACTION_HW_STATS_*
      except by disabled which is mapped to FLOW_ACTION_HW_STATS_DISABLED
      (this is 0 in tc). Add tc_act_hw_stats() to perform the mapping between
      TCA_ACT_HW_STATS_* and FLOW_ACTION_HW_STATS_*.
      
      Fixes: 319a1d19 ("flow_offload: check for basic action hw stats type")
      Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      16f80360
    • Lukas Bulwahn's avatar
      MAINTAINERS: put DYNAMIC INTERRUPT MODERATION in proper order · b0956956
      Lukas Bulwahn authored
      Commit 9b038086 ("docs: networking: convert DIM to RST") added a new
      file entry to DYNAMIC INTERRUPT MODERATION to the end, and not following
      alphabetical order.
      
      So, ./scripts/checkpatch.pl -f MAINTAINERS complains:
      
        WARNING: Misordered MAINTAINERS entry - list file patterns in alphabetic
        order
        #5966: FILE: MAINTAINERS:5966:
        +F:      lib/dim/
        +F:      Documentation/networking/net_dim.rst
      
      Reorder the file entries to keep MAINTAINERS nicely ordered.
      Signed-off-by: default avatarLukas Bulwahn <lukas.bulwahn@gmail.com>
      Acked-by: default avatarJakub Kicinski <kuba@kernel.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b0956956
    • David S. Miller's avatar
      Merge branch 'wireguard-fixes' · d3f3e6ac
      David S. Miller authored
      Jason A. Donenfeld says:
      
      ====================
      wireguard fixes for 5.7-rc5
      
      With Ubuntu and Debian having backported this into their kernels, we're
      finally seeing testing from places we hadn't seen prior, which is nice.
      With that comes more fixes:
      
      1) The CI for PPC64 was running with extremely small stacks for 64-bit,
         causing spurious crashes in surprising places.
      
      2) There's was an old leftover routing loop restriction, which no longer
         makes sense given the queueing architecture, and was causing problems
         for people who really did want nested routing.
      
      3) Not yielding our kthread on CONFIG_PREEMPT_VOLUNTARY systems caused
         RCU stalls and other issues, reported by Wang Jian, with the fix
         suggested by Sultan Alsawaf.
      
      4) Clang spewed warnings in a selftest for CONFIG_IPV6=n, reported by
         Arnd Bergmann.
      
      5) A complicated if statement was simplified to an assignment while also
         making the likely/unlikely hinting more correct and simple, and
         increasing readability, suggested by Sultan.
      
      Patches (2) and (3) have Fixes: lines and are probably good candidates
      for stable.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d3f3e6ac
    • Jason A. Donenfeld's avatar
      wireguard: send/receive: use explicit unlikely branch instead of implicit coalescing · 243f2148
      Jason A. Donenfeld authored
      It's very unlikely that send will become true. It's nearly always false
      between 0 and 120 seconds of a session, and in most cases becomes true
      only between 120 and 121 seconds before becoming false again. So,
      unlikely(send) is clearly the right option here.
      
      What happened before was that we had this complex boolean expression
      with multiple likely and unlikely clauses nested. Since this is
      evaluated left-to-right anyway, the whole thing got converted to
      unlikely. So, we can clean this up to better represent what's going on.
      
      The generated code is the same.
      Suggested-by: default avatarSultan Alsawaf <sultan@kerneltoast.com>
      Signed-off-by: default avatarJason A. Donenfeld <Jason@zx2c4.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      243f2148
    • Jason A. Donenfeld's avatar
      wireguard: selftests: initalize ipv6 members to NULL to squelch clang warning · 4fed818e
      Jason A. Donenfeld authored
      Without setting these to NULL, clang complains in certain
      configurations that have CONFIG_IPV6=n:
      
      In file included from drivers/net/wireguard/ratelimiter.c:223:
      drivers/net/wireguard/selftest/ratelimiter.c:173:34: error: variable 'skb6' is uninitialized when used here [-Werror,-Wuninitialized]
                      ret = timings_test(skb4, hdr4, skb6, hdr6, &test_count);
                                                     ^~~~
      drivers/net/wireguard/selftest/ratelimiter.c:123:29: note: initialize the variable 'skb6' to silence this warning
              struct sk_buff *skb4, *skb6;
                                         ^
                                          = NULL
      drivers/net/wireguard/selftest/ratelimiter.c:173:40: error: variable 'hdr6' is uninitialized when used here [-Werror,-Wuninitialized]
                      ret = timings_test(skb4, hdr4, skb6, hdr6, &test_count);
                                                           ^~~~
      drivers/net/wireguard/selftest/ratelimiter.c:125:22: note: initialize the variable 'hdr6' to silence this warning
              struct ipv6hdr *hdr6;
                                  ^
      
      We silence this warning by setting the variables to NULL as the warning
      suggests.
      Reported-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarJason A. Donenfeld <Jason@zx2c4.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4fed818e
    • Jason A. Donenfeld's avatar
      wireguard: send/receive: cond_resched() when processing worker ringbuffers · 4005f5c3
      Jason A. Donenfeld authored
      Users with pathological hardware reported CPU stalls on CONFIG_
      PREEMPT_VOLUNTARY=y, because the ringbuffers would stay full, meaning
      these workers would never terminate. That turned out not to be okay on
      systems without forced preemption, which Sultan observed. This commit
      adds a cond_resched() to the bottom of each loop iteration, so that
      these workers don't hog the core. Note that we don't need this on the
      napi poll worker, since that terminates after its budget is expended.
      Suggested-by: default avatarSultan Alsawaf <sultan@kerneltoast.com>
      Reported-by: default avatarWang Jian <larkwang@gmail.com>
      Fixes: e7096c13 ("net: WireGuard secure network tunnel")
      Signed-off-by: default avatarJason A. Donenfeld <Jason@zx2c4.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4005f5c3
    • Jason A. Donenfeld's avatar
      wireguard: socket: remove errant restriction on looping to self · b673e24a
      Jason A. Donenfeld authored
      It's already possible to create two different interfaces and loop
      packets between them. This has always been possible with tunnels in the
      kernel, and isn't specific to wireguard. Therefore, the networking stack
      already needs to deal with that. At the very least, the packet winds up
      exceeding the MTU and is discarded at that point. So, since this is
      already something that happens, there's no need to forbid the not very
      exceptional case of routing a packet back to the same interface; this
      loop is no different than others, and we shouldn't special case it, but
      rather rely on generic handling of loops in general. This also makes it
      easier to do interesting things with wireguard such as onion routing.
      
      At the same time, we add a selftest for this, ensuring that both onion
      routing works and infinite routing loops do not crash the kernel. We
      also add a test case for wireguard interfaces nesting packets and
      sending traffic between each other, as well as the loop in this case
      too. We make sure to send some throughput-heavy traffic for this use
      case, to stress out any possible recursion issues with the locks around
      workqueues.
      
      Fixes: e7096c13 ("net: WireGuard secure network tunnel")
      Signed-off-by: default avatarJason A. Donenfeld <Jason@zx2c4.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b673e24a
    • Jason A. Donenfeld's avatar
      wireguard: selftests: use normal kernel stack size on ppc64 · a0fd7cc8
      Jason A. Donenfeld authored
      While at some point it might have made sense to be running these tests
      on ppc64 with 4k stacks, the kernel hasn't actually used 4k stacks on
      64-bit powerpc in a long time, and more interesting things that we test
      don't really work when we deviate from the default (16k). So, we stop
      pushing our luck in this commit, and return to the default instead of
      the minimum.
      Signed-off-by: default avatarJason A. Donenfeld <Jason@zx2c4.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a0fd7cc8
    • Grygorii Strashko's avatar
      net: ethernet: ti: am65-cpsw-nuss: fix irqs type · 6f5c27f9
      Grygorii Strashko authored
      The K3 INTA driver, which is source TX/RX IRQs for CPSW NUSS, defines IRQs
      triggering type as EDGE by default, but triggering type for CPSW NUSS TX/RX
      IRQs has to be LEVEL as the EDGE triggering type may cause unnecessary IRQs
      triggering and NAPI scheduling for empty queues. It was discovered with
      RT-kernel.
      
      Fix it by explicitly specifying CPSW NUSS TX/RX IRQ type as
      IRQF_TRIGGER_HIGH.
      
      Fixes: 93a76530 ("net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver")
      Signed-off-by: default avatarGrygorii Strashko <grygorii.strashko@ti.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6f5c27f9
    • Geert Uytterhoeven's avatar
      ionic: Use debugfs_create_bool() to export bool · 0735ccc9
      Geert Uytterhoeven authored
      Currently bool ionic_cq.done_color is exported using
      debugfs_create_u8(), which requires a cast, preventing further compiler
      checks.
      
      Fix this by switching to debugfs_create_bool(), and dropping the cast.
      Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
      Acked-by: default avatarShannon Nelson <snelson@pensando.io>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0735ccc9
    • Florian Fainelli's avatar
      net: dsa: Do not leave DSA master with NULL netdev_ops · 050569fc
      Florian Fainelli authored
      When ndo_get_phys_port_name() for the CPU port was added we introduced
      an early check for when the DSA master network device in
      dsa_master_ndo_setup() already implements ndo_get_phys_port_name(). When
      we perform the teardown operation in dsa_master_ndo_teardown() we would
      not be checking that cpu_dp->orig_ndo_ops was successfully allocated and
      non-NULL initialized.
      
      With network device drivers such as virtio_net, this leads to a NPD as
      soon as the DSA switch hanging off of it gets torn down because we are
      now assigning the virtio_net device's netdev_ops a NULL pointer.
      
      Fixes: da7b9e9b ("net: dsa: Add ndo_get_phys_port_name() for CPU port")
      Reported-by: default avatarAllen Pais <allen.pais@oracle.com>
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Tested-by: default avatarAllen Pais <allen.pais@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      050569fc
    • Vladimir Oltean's avatar
      net: dsa: remove duplicate assignment in dsa_slave_add_cls_matchall_mirred · 65722159
      Vladimir Oltean authored
      This was caused by a poor merge conflict resolution on my side. The
      "act = &cls->rule->action.entries[0];" assignment was already present in
      the code prior to the patch mentioned below.
      
      Fixes: e13c2075 ("net: dsa: refactor matchall mirred action to separate function")
      Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      65722159
    • Willem de Bruijn's avatar
      net: stricter validation of untrusted gso packets · 9274124f
      Willem de Bruijn authored
      Syzkaller again found a path to a kernel crash through bad gso input:
      a packet with transport header extending beyond skb_headlen(skb).
      
      Tighten validation at kernel entry:
      
      - Verify that the transport header lies within the linear section.
      
          To avoid pulling linux/tcp.h, verify just sizeof tcphdr.
          tcp_gso_segment will call pskb_may_pull (th->doff * 4) before use.
      
      - Match the gso_type against the ip_proto found by the flow dissector.
      
      Fixes: bfd5f4a3 ("packet: Add GSO/csum offload support.")
      Reported-by: default avatarsyzbot <syzkaller@googlegroups.com>
      Signed-off-by: default avatarWillem de Bruijn <willemb@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9274124f
    • Ahmed Abdelsalam's avatar
      seg6: fix SRH processing to comply with RFC8754 · 0cb7498f
      Ahmed Abdelsalam authored
      The Segment Routing Header (SRH) which defines the SRv6 dataplane is defined
      in RFC8754.
      
      RFC8754 (section 4.1) defines the SR source node behavior which encapsulates
      packets into an outer IPv6 header and SRH. The SR source node encodes the
      full list of Segments that defines the packet path in the SRH. Then, the
      first segment from list of Segments is copied into the Destination address
      of the outer IPv6 header and the packet is sent to the first hop in its path
      towards the destination.
      
      If the Segment list has only one segment, the SR source node can omit the SRH
      as he only segment is added in the destination address.
      
      RFC8754 (section 4.1.1) defines the Reduced SRH, when a source does not
      require the entire SID list to be preserved in the SRH. A reduced SRH does
      not contain the first segment of the related SR Policy (the first segment is
      the one already in the DA of the IPv6 header), and the Last Entry field is
      set to n-2, where n is the number of elements in the SR Policy.
      
      RFC8754 (section 4.3.1.1) defines the SRH processing and the logic to
      validate the SRH (S09, S10, S11) which works for both reduced and
      non-reduced behaviors.
      
      This patch updates seg6_validate_srh() to validate the SRH as per RFC8754.
      Signed-off-by: default avatarAhmed Abdelsalam <ahabdels@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0cb7498f
    • David S. Miller's avatar
      Merge branch 'FDB-fixes-for-Felix-and-Ocelot-switches' · 6e0ddb65
      David S. Miller authored
      Vladimir Oltean says:
      
      ====================
      FDB fixes for Felix and Ocelot switches
      
      This series fixes the following problems:
      - Dynamically learnt addresses never expiring (neither for Ocelot nor
        for Felix)
      - Half of the FDB not visible in 'bridge fdb show' (for Felix only)
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6e0ddb65
    • Vladimir Oltean's avatar
      net: mscc: ocelot: ANA_AUTOAGE_AGE_PERIOD holds a value in seconds, not ms · c0d7eccb
      Vladimir Oltean authored
      One may notice that automatically-learnt entries 'never' expire, even
      though the bridge configures the address age period at 300 seconds.
      
      Actually the value written to hardware corresponds to a time interval
      1000 times higher than intended, i.e. 83 hours.
      
      Fixes: a556c76a ("net: mscc: Add initial Ocelot switch support")
      Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
      Reviewed-by: default avatarFlorian Faineli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c0d7eccb
    • Vladimir Oltean's avatar
      net: dsa: ocelot: the MAC table on Felix is twice as large · 21ce7f3e
      Vladimir Oltean authored
      When running 'bridge fdb dump' on Felix, sometimes learnt and static MAC
      addresses would appear, sometimes they wouldn't.
      
      Turns out, the MAC table has 4096 entries on VSC7514 (Ocelot) and 8192
      entries on VSC9959 (Felix), so the existing code from the Ocelot common
      library only dumped half of Felix's MAC table. They are both organized
      as a 4-way set-associative TCAM, so we just need a single variable
      indicating the correct number of rows.
      
      Fixes: 56051948 ("net: dsa: ocelot: add driver for Felix switch family")
      Signed-off-by: default avatarVladimir Oltean <vladimir.oltean@nxp.com>
      Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      21ce7f3e