1. 23 Oct, 2016 4 commits
    • Jiri Slaby's avatar
      net: sctp, forbid negative length · a4b8e71b
      Jiri Slaby authored
      
      
      Most of getsockopt handlers in net/sctp/socket.c check len against
      sizeof some structure like:
              if (len < sizeof(int))
                      return -EINVAL;
      
      On the first look, the check seems to be correct. But since len is int
      and sizeof returns size_t, int gets promoted to unsigned size_t too. So
      the test returns false for negative lengths. Yes, (-1 < sizeof(long)) is
      false.
      
      Fix this in sctp by explicitly checking len < 0 before any getsockopt
      handler is called.
      
      Note that sctp_getsockopt_events already handled the negative case.
      Since we added the < 0 check elsewhere, this one can be removed.
      
      If not checked, this is the result:
      UBSAN: Undefined behaviour in ../mm/page_alloc.c:2722:19
      shift exponent 52 is too large for 32-bit type 'int'
      CPU: 1 PID: 24535 Comm: syz-executor Not tainted 4.8.1-0-syzkaller #1
      Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.1-0-gb3ef39f-prebuilt.qemu-project.org 04/01/2014
       0000000000000000 ffff88006d99f2a8 ffffffffb2f7bdea 0000000041b58ab3
       ffffffffb4363c14 ffffffffb2f7bcde ffff88006d99f2d0 ffff88006d99f270
       0000000000000000 0000000000000000 0000000000000034 ffffffffb5096422
      Call Trace:
       [<ffffffffb3051498>] ? __ubsan_handle_shift_out_of_bounds+0x29c/0x300
      ...
       [<ffffffffb273f0e4>] ? kmalloc_order+0x24/0x90
       [<ffffffffb27416a4>] ? kmalloc_order_trace+0x24/0x220
       [<ffffffffb2819a30>] ? __kmalloc+0x330/0x540
       [<ffffffffc18c25f4>] ? sctp_getsockopt_local_addrs+0x174/0xca0 [sctp]
       [<ffffffffc18d2bcd>] ? sctp_getsockopt+0x10d/0x1b0 [sctp]
       [<ffffffffb37c1219>] ? sock_common_getsockopt+0xb9/0x150
       [<ffffffffb37be2f5>] ? SyS_getsockopt+0x1a5/0x270
      Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
      Cc: Vlad Yasevich <vyasevich@gmail.com>
      Cc: Neil Horman <nhorman@tuxdriver.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: linux-sctp@vger.kernel.org
      Cc: netdev@vger.kernel.org
      Acked-by: default avatarNeil Horman <nhorman@tuxdriver.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a4b8e71b
    • Fabio Estevam's avatar
      net: fec: Call swap_buffer() prior to IP header alignment · 235bde1e
      Fabio Estevam authored
      Commit 3ac72b7b ("net: fec: align IP header in hardware") breaks
      networking on mx28.
      
      There is an erratum on mx28 (ENGR121613 - ENET big endian mode
      not compatible with ARM little endian) that requires an additional
      byte-swap operation to workaround this problem.
      
      So call swap_buffer() prior to performing the IP header alignment
      to restore network functionality on mx28.
      
      Fixes: 3ac72b7b
      
       ("net: fec: align IP header in hardware")
      Reported-and-tested-by: default avatarHenri Roosen <henri.roosen@ginzinger.com>
      Signed-off-by: default avatarFabio Estevam <fabio.estevam@nxp.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      235bde1e
    • Jason A. Donenfeld's avatar
      ipv6: do not increment mac header when it's unset · b678aa57
      Jason A. Donenfeld authored
      
      
      Otherwise we'll overflow the integer. This occurs when layer 3 tunneled
      packets are handed off to the IPv6 layer.
      Signed-off-by: default avatarJason A. Donenfeld <Jason@zx2c4.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b678aa57
    • Sudarsana Reddy Kalluru's avatar
      bnx2x: Use the correct divisor value for PHC clock readings. · a6e2846c
      Sudarsana Reddy Kalluru authored
      
      
      Time Sync (PTP) implementation uses the divisor/shift value for converting
      the clock ticks to nanoseconds. Driver currently defines shift value as 1,
      this results in the nanoseconds value to be calculated as half the actual
      value. Hence the user application fails to synchronize the device clock
      value with the PTP master device clock. Need to use the 'shift' value of 0.
      Signed-off-by: default avatarSony.Chacko <Sony.Chacko@cavium.com>
      Signed-off-by: default avatarSudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
      Signed-off-by: default avatarYuval Mintz <Yuval.Mintz@cavium.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a6e2846c
  2. 22 Oct, 2016 13 commits
  3. 21 Oct, 2016 3 commits
    • WANG Cong's avatar
      ipv6: fix a potential deadlock in do_ipv6_setsockopt() · 8651be8f
      WANG Cong authored
      Baozeng reported this deadlock case:
      
             CPU0                    CPU1
             ----                    ----
        lock([  165.136033] sk_lock-AF_INET6);
                                     lock([  165.136033] rtnl_mutex);
                                     lock([  165.136033] sk_lock-AF_INET6);
        lock([  165.136033] rtnl_mutex);
      
      Similar to commit 87e9f031
      ("ipv4: fix a potential deadlock in mcast getsockopt() path")
      this is due to we still have a case, ipv6_sock_mc_close(),
      where we acquire sk_lock before rtnl_lock. Close this deadlock
      with the similar solution, that is always acquire rtnl lock first.
      
      Fixes: baf606d9
      
       ("ipv4,ipv6: grab rtnl before locking the socket")
      Reported-by: default avatarBaozeng Ding <sploving1@gmail.com>
      Tested-by: default avatarBaozeng Ding <sploving1@gmail.com>
      Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
      Signed-off-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
      Reviewed-by: default avatarMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8651be8f
    • David S. Miller's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf · 8dbad1a8
      David S. Miller authored
      
      
      Pablo Neira Ayuso says:
      
      ====================
      Netfilter fixes for net
      
      The following patchset contains Netfilter fixes for your net tree,
      they are:
      
      1) Fix compilation warning in xt_hashlimit on m68k 32-bits, from
         Geert Uytterhoeven.
      
      2) Fix wrong timeout in set elements added from packet path via
         nft_dynset, from Anders K. Pedersen.
      
      3) Remove obsolete nf_conntrack_events_retry_timeout sysctl
         documentation, from Nicolas Dichtel.
      
      4) Ensure proper initialization of log flags via xt_LOG, from
         Liping Zhang.
      
      5) Missing alias to autoload ipcomp, also from Liping Zhang.
      
      6) Missing NFTA_HASH_OFFSET attribute validation, again from Liping.
      
      7) Wrong integer type in the new nft_parse_u32_check() function,
         from Dan Carpenter.
      
      8) Another wrong integer type declaration in nft_exthdr_init, also
         from Dan Carpenter.
      
      9) Fix insufficient mode validation in nft_range.
      
      10) Fix compilation warning in nft_range due to possible uninitialized
          value, from Arnd Bergmann.
      
      11) Zero nf_hook_ops allocated via xt_hook_alloc() in x_tables to
          calm down kmemcheck, from Florian Westphal.
      
      12) Schedule gc_worker() to run again if GC_MAX_EVICTS quota is reached,
          from Nicolas Dichtel.
      
      13) Fix nf_queue() after conversion to single-linked hook list, related
          to incorrect bypass flag handling and incorrect hook point of
          reinjection.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8dbad1a8
    • Florian Fainelli's avatar
      kexec: Export kexec_in_progress to modules · 97dcaa0f
      Florian Fainelli authored
      The bcm_sf2 driver uses kexec_in_progress to know whether it can power
      down an integrated PHY during shutdown, and can be built as a module.
      Other modules may be using this in the future, so export it.
      
      Fixes: 2399d614
      
       ("net: dsa: bcm_sf2: Prevent GPHY shutdown for kexec'd kernels")
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      97dcaa0f
  4. 20 Oct, 2016 19 commits
  5. 19 Oct, 2016 1 commit