1. 14 May, 2021 21 commits
  2. 13 May, 2021 19 commits
    • Gustavo A. R. Silva's avatar
      net: mana: Use struct_size() in kzalloc() · ea89c862
      Gustavo A. R. Silva authored
      Make use of the struct_size() helper instead of an open-coded version,
      in order to avoid any potential type mistakes or integer overflows
      that, in the worst scenario, could lead to heap overflows.
      
      This code was detected with the help of Coccinelle and, audited and
      fixed manually.
      Signed-off-by: default avatarGustavo A. R. Silva <gustavoars@kernel.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ea89c862
    • Gustavo A. R. Silva's avatar
      bpf: Use struct_size() in kzalloc() · fe0bdaec
      Gustavo A. R. Silva authored
      Make use of the struct_size() helper instead of an open-coded version,
      in order to avoid any potential type mistakes or integer overflows
      that, in the worst scenario, could lead to heap overflows.
      
      This code was detected with the help of Coccinelle and, audited and
      fixed manually.
      Signed-off-by: default avatarGustavo A. R. Silva <gustavoars@kernel.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      fe0bdaec
    • Guenter Roeck's avatar
      net: caif: Drop unnecessary NULL check after container_of · 0f3ee280
      Guenter Roeck authored
      The first parameter passed to chnl_recv_cb() can never be NULL since all
      callers dereferenced it. Consequently, container_of() on it is also never
      NULL, even though the reference into the structure points to the first
      element of the structure. The NULL check is therefore unnecessary.
      On top of that, it is misleading to perform a NULL check on the result of
      container_of() because the position of the contained element could change,
      which would make the test invalid. Remove the unnecessary NULL check.
      
      This change was made automatically with the following Coccinelle script.
      
      @@
      type t;
      identifier v;
      statement s;
      @@
      
      <+...
      (
        t v = container_of(...);
      |
        v = container_of(...);
      )
        ...
        when != v
      - if (\( !v \| v == NULL \) ) s
      ...+>
      Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0f3ee280
    • Colin Ian King's avatar
      net: qed: remove redundant initialization of variable rc · 5efe2575
      Colin Ian King authored
      The variable rc is being initialized with a value that is never read,
      it is being updated later on.  The assignment is redundant and can be
      removed.
      
      Addresses-Coverity: ("Unused value")
      Signed-off-by: default avatarColin Ian King <colin.king@canonical.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5efe2575
    • David S. Miller's avatar
      Merge branch 'virtio_net-fixes' · 25e248a2
      David S. Miller authored
      Xuan Zhuo says:
      
      ====================
      virtio-net: fix for build_skb()
      
      The logic of this piece is really messy. Fortunately, my refactored patch can be
      completed with a small amount of testing.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      25e248a2
    • Xuan Zhuo's avatar
      virtio-net: get build_skb() buf by data ptr · 7bf64460
      Xuan Zhuo authored
      In the case of merge, the page passed into page_to_skb() may be a head
      page, not the page where the current data is located. So when trying to
      get the buf where the data is located, you should directly use the
      pointer(p) to get the address corresponding to the page.
      
      At the same time, the offset of the data in the page should also be
      obtained using offset_in_page().
      
      This patch solves this problem. But if you don’t use this patch, the
      original code can also run, because if the page is not the page of the
      current data, the calculated tailroom will be less than 0, and will not
      enter the logic of build_skb() . The significance of this patch is to
      modify this logical problem, allowing more situations to use
      build_skb().
      Signed-off-by: default avatarXuan Zhuo <xuanzhuo@linux.alibaba.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      7bf64460
    • Xuan Zhuo's avatar
      virtio-net: fix for unable to handle page fault for address · 6c66c147
      Xuan Zhuo authored
      In merge mode, when xdp is enabled, if the headroom of buf is smaller
      than virtnet_get_headroom(), xdp_linearize_page() will be called but the
      variable of "headroom" is still 0, which leads to wrong logic after
      entering page_to_skb().
      
      [   16.600944] BUG: unable to handle page fault for address: ffffecbfff7b43c8[   16.602175] #PF: supervisor read access in kernel mode
      [   16.603350] #PF: error_code(0x0000) - not-present page
      [   16.604200] PGD 0 P4D 0
      [   16.604686] Oops: 0000 [#1] SMP PTI
      [   16.605306] CPU: 4 PID: 715 Comm: sh Tainted: G    B             5.12.0+ #312
      [   16.606429] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/04
      [   16.608217] RIP: 0010:unmap_page_range+0x947/0xde0
      [   16.609014] Code: 00 00 08 00 48 83 f8 01 45 19 e4 41 f7 d4 41 83 e4 03 e9 a4 fd ff ff e8 b7 63 ed ff 4c 89 e0 48 c1 e0 065
      [   16.611863] RSP: 0018:ffffc90002503c58 EFLAGS: 00010286
      [   16.612720] RAX: ffffecbfff7b43c0 RBX: 00007f19f7203000 RCX: ffffffff812ff359
      [   16.613853] RDX: ffff888107778000 RSI: 0000000000000000 RDI: 0000000000000005
      [   16.614976] RBP: ffffea000425e000 R08: 0000000000000000 R09: 3030303030303030
      [   16.616124] R10: ffffffff82ed7d94 R11: 6637303030302052 R12: 7c00000afffded0f
      [   16.617276] R13: 0000000000000001 R14: ffff888119ee7010 R15: 00007f19f7202000
      [   16.618423] FS:  0000000000000000(0000) GS:ffff88842fd00000(0000) knlGS:0000000000000000
      [   16.619738] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      [   16.620670] CR2: ffffecbfff7b43c8 CR3: 0000000103220005 CR4: 0000000000370ee0
      [   16.621792] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
      [   16.622920] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
      [   16.624047] Call Trace:
      [   16.624525]  ? release_pages+0x24d/0x730
      [   16.625209]  unmap_single_vma+0xa9/0x130
      [   16.625885]  unmap_vmas+0x76/0xf0
      [   16.626480]  exit_mmap+0xa0/0x210
      [   16.627129]  mmput+0x67/0x180
      [   16.627673]  do_exit+0x3d1/0xf10
      [   16.628259]  ? do_user_addr_fault+0x231/0x840
      [   16.629000]  do_group_exit+0x53/0xd0
      [   16.629631]  __x64_sys_exit_group+0x1d/0x20
      [   16.630354]  do_syscall_64+0x3c/0x80
      [   16.630988]  entry_SYSCALL_64_after_hwframe+0x44/0xae
      [   16.631828] RIP: 0033:0x7f1a043d0191
      [   16.632464] Code: Unable to access opcode bytes at RIP 0x7f1a043d0167.
      [   16.633502] RSP: 002b:00007ffe3d993308 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
      [   16.634737] RAX: ffffffffffffffda RBX: 00007f1a044c9490 RCX: 00007f1a043d0191
      [   16.635857] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
      [   16.636986] RBP: 0000000000000000 R08: ffffffffffffff88 R09: 0000000000000001
      [   16.638120] R10: 0000000000000008 R11: 0000000000000246 R12: 00007f1a044c9490
      [   16.639245] R13: 0000000000000001 R14: 00007f1a044c9968 R15: 0000000000000000
      [   16.640408] Modules linked in:
      [   16.640958] CR2: ffffecbfff7b43c8
      [   16.641557] ---[ end trace bc4891c6ce46354c ]---
      [   16.642335] RIP: 0010:unmap_page_range+0x947/0xde0
      [   16.643135] Code: 00 00 08 00 48 83 f8 01 45 19 e4 41 f7 d4 41 83 e4 03 e9 a4 fd ff ff e8 b7 63 ed ff 4c 89 e0 48 c1 e0 065
      [   16.645983] RSP: 0018:ffffc90002503c58 EFLAGS: 00010286
      [   16.646845] RAX: ffffecbfff7b43c0 RBX: 00007f19f7203000 RCX: ffffffff812ff359
      [   16.647970] RDX: ffff888107778000 RSI: 0000000000000000 RDI: 0000000000000005
      [   16.649091] RBP: ffffea000425e000 R08: 0000000000000000 R09: 3030303030303030
      [   16.650250] R10: ffffffff82ed7d94 R11: 6637303030302052 R12: 7c00000afffded0f
      [   16.651394] R13: 0000000000000001 R14: ffff888119ee7010 R15: 00007f19f7202000
      [   16.652529] FS:  0000000000000000(0000) GS:ffff88842fd00000(0000) knlGS:0000000000000000
      [   16.653887] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      [   16.654841] CR2: ffffecbfff7b43c8 CR3: 0000000103220005 CR4: 0000000000370ee0
      [   16.655992] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
      [   16.657150] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
      [   16.658290] Kernel panic - not syncing: Fatal exception
      [   16.659613] Kernel Offset: disabled
      [   16.660234] ---[ end Kernel panic - not syncing: Fatal exception ]---
      
      Fixes: fb32856b ("virtio-net: page_to_skb() use build_skb when there's sufficient tailroom")
      Signed-off-by: default avatarXuan Zhuo <xuanzhuo@linux.alibaba.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6c66c147
    • David S. Miller's avatar
      Merge branch 'atl1c-support-for-Mikrotik-10-25G-NIC-features' · 33b31426
      David S. Miller authored
      Gatis Peisenieks says:
      
      ====================
      atl1c: support for Mikrotik 10/25G NIC features
      
      The new Mikrotik 10/25G NIC maintains compatibility with existing atl1c
      driver. However it does have new features.
      
      This patch set adds support for reporting cards higher link speed, max-mtu,
      enables rx csum offload and improves tx performance.
      
      v2:
          - fixed xmit_more handling as pointed out by Eric Dumazet
          - added a more reliable link detection on Mikrotik 10/25G NIC
            since MDIO op emulation can occasionally fail
      Guangbin Huang says:
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      33b31426
    • Gatis Peisenieks's avatar
      atl1c: improve link detection reliability on Mikrotik 10/25G NIC · ea0fbd05
      Gatis Peisenieks authored
      Mikrotik 10/25G NIC emulates the MDIO accesses, but the emulation is
      not 100% reliable - the MDIO ops occasionally can timeout.
      
      This adds a reliable way of detecting link on Mikrotik 10/25G NIC.
      Signed-off-by: default avatarGatis Peisenieks <gatis@mikrotik.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ea0fbd05
    • Gatis Peisenieks's avatar
      atl1c: enable rx csum offload on Mikrotik 10/25G NIC · b0390009
      Gatis Peisenieks authored
      Mikrotik 10/25G NIC supports hw checksum verification on rx for
      IP/IPv6 + TCP/UDP packets. HW checksum offload helps reduce host
      cpu load.
      
      This enables the csum offload specifically for Mikrotik 10/25G NIC
      as other HW supported by the driver is known to have problems with it.
      
      TCP iperf3 to Threadripper 3960X with NIC improved 16.5 -> 20.0 Gbps
      with mtu=1500.
      Signed-off-by: default avatarGatis Peisenieks <gatis@mikrotik.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b0390009
    • Gatis Peisenieks's avatar
      atl1c: adjust max mtu according to Mikrotik 10/25G NIC ability · 545fa3fb
      Gatis Peisenieks authored
      The new Mikrotik 10/25G NIC supports jumbo frames. Jumbo frames are
      supported for TSO as well.
      
      This enables the support for mtu up to 9500 bytes.
      Signed-off-by: default avatarGatis Peisenieks <gatis@mikrotik.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      545fa3fb
    • Gatis Peisenieks's avatar
      atl1c: improve performance by avoiding unnecessary pcie writes on xmit · d7ab6419
      Gatis Peisenieks authored
      The kernel has xmit_more facility that hints the networking driver xmit
      path about whether more packets are coming soon. This information can be
      used to avoid unnecessary expensive PCIe transaction per tx packet.
      
      Max TX pps on Mikrotik 10/25G NIC in a Threadripper 3960X system
      improved from 1150Kpps to 1700Kpps.
      
      Testing L2 forwarding on AR8151 hardware did not reveal a measurable
      increase in latency.
      Signed-off-by: default avatarGatis Peisenieks <gatis@mikrotik.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d7ab6419
    • Gatis Peisenieks's avatar
      atl1c: show correct link speed on Mikrotik 10/25G NIC · f19d4997
      Gatis Peisenieks authored
      The new Mikrotik 10/25G NIC maintains compatibility with existing atl1c
      driver. However it does have new features.
      
      This defines some new register offsets, code for identifying the new type
      of NIC and correct speed detection for the NIC.
      Signed-off-by: default avatarGatis Peisenieks <gatis@mikrotik.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f19d4997
    • David S. Miller's avatar
      Merge branch 'hinic-cleanups' · 0d59c95e
      David S. Miller authored
      Guangbin Huang says:
      
      ====================
      net: hinic: some cleanups
      
      This patchset adds some cleanups for the hinic ethernet driver.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0d59c95e
    • Guangbin Huang's avatar
      net: hinic: fix misspelled "acessing" · 5db8c86e
      Guangbin Huang authored
      The word "acessing" is misspelled, so fix it.
      Signed-off-by: default avatarGuangbin Huang <huangguangbin2@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5db8c86e
    • Guangbin Huang's avatar
      net: hinic: remove unnecessary parentheses · c8ad5df6
      Guangbin Huang authored
      There are some unnecessary parentheses, this patch deletes them.
      Signed-off-by: default avatarGuangbin Huang <huangguangbin2@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c8ad5df6
    • Guangbin Huang's avatar
      net: hinic: add blank line after function declaration · 3402ab54
      Guangbin Huang authored
      There should be a blank line after function declaration, so add two
      missed blank lines.
      Signed-off-by: default avatarGuangbin Huang <huangguangbin2@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      3402ab54
    • Guangbin Huang's avatar
      net: hinic: remove unnecessary blank line · 9afcb595
      Guangbin Huang authored
      There are two blank lines are unnecessary, this patch removes them.
      Signed-off-by: default avatarGuangbin Huang <huangguangbin2@huawei.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9afcb595
    • David S. Miller's avatar
      Merge branch 'bridge-split-ipv4-ipv6-mc-router-state' · d38717af
      David S. Miller authored
      Linus Lüssing says:
      
      ====================
      net: bridge: split IPv4/v6 mc router state and export for batman-adv
      
      The following patches are splitting the so far combined multicast router
      state in the Linux bridge into two ones, one for IPv4 and one for IPv6,
      for a more fine-grained detection of multicast routers. This avoids
      sending IPv4 multicast packets to an IPv6-only multicast router and
      avoids sending IPv6 multicast packets to an IPv4-only multicast router.
      This also allows batman-adv to make use of the now split information in
      the final patch.
      
      The first eight patches prepare the bridge code to avoid duplicate
      code or IPv6-#ifdef clutter for the multicast router state split. And
      contain no functional changes yet.
      
      The ninth patch then implements the IPv4+IPv6 multicast router state
      split.
      
      Patch number ten adds IPv4+IPv6 specific timers to the mdb netlink
      router port dump, so that the timers validity can be checked individually
      from userspace.
      
      The final, eleventh patch exports this now per protocol family multicast
      router state so that batman-adv can then later make full use of the
      Multicast Router Discovery (MRD) support in the Linux bridge. The
      batman-adv protocol format currently expects separate multicast router
      states for IPv4 and IPv6, therefore it depends on the first patch.
      batman-adv will then make use of this newly exported functions like
      this[0].
      
      Regards, Linus
      
      [0]: https://git.open-mesh.org/batman-adv.git/shortlog/refs/heads/linus/multicast-routeable-mrd
           -> https://git.open-mesh.org/batman-adv.git/commit/d4bed3a92427445708baeb1f2d1841c5fb816fd4
      
      Changelog v3:
      
      * Patch 01/11:
        * fixed/added missing rename of br->router_list to
          br->ip4_mc_router_list in br_multicast_flood()
      * Patch 02/11:
        * moved inline functions from br_forward.c to br_private.h
      * Patch 03/11:
        * removed inline attribute from functions added to br_mdb.c
      * Patch 04/11:
        * unchanged
      * Patch 05/11:
        * converted if()'s into switch-case in br_multicast_is_router()
      * Patch 06/11:
        * removed inline attribute from function added to br_multicast.c
      * Patch 07/11:
        * added missing static attribute to function
          br_ip4_multicast_get_rport_slot() added to br_multicast.c
      * Patch 08/11:
        * removed inline attribute from function added to br_multicast.c
      * Patch 09/11:
        * added missing static attribute to function
          br_ip6_multicast_get_rport_slot() added to br_multicast.c
        * removed inline attribute from function added to br_multicast.c
      * Patch 10/11:
        * unchanged
      * Patch 11/11:
        * simplified bridge check in br_multicast_has_router_adjacent()
          by using br_port_get_check_rcu()
        * added missing declaration for br_multicast_has_router_adjacent()
          in include/linux/if_bridge.h
      
      Changelog v2:
      
      * split into multiple patches as suggested by Nikolay
      * added helper functions to br_multicast_flood(), avoiding
        IPv6 #ifdef clutter
      * fixed reverse xmas tree ordering in br_rports_fill_info() and
        added helper functions to avoid IPv6 #ifdef clutter
      * Added a common br_multicast_add_router() and a helper function
        to retrieve the correct slot to avoid duplicate code for an
        ip4 and ip6 variant
      * replaced the "1" and "2" constants in br_multicast_is_router()
        with the appropriate enums
      * added br_{ip4,ip6}_multicast_rport_del() wrappers to reduce
        IPv6 #ifdef clutter
      * added return values to br_*multicast_rport_del() to only notify
        if the port was actually removed and did not race with a readdition
        somewhere else
      * added empty, void br_ip6_multicast_mark_router() if compiled
        without IPv6, to reduce IPv6 #ifdef clutter
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      d38717af