1. 13 Sep, 2013 5 commits
  2. 12 Sep, 2013 12 commits
    • Daniel Borkmann's avatar
      net: sctp: fix ipv6 ipsec encryption bug in sctp_v6_xmit · 95ee6208
      Daniel Borkmann authored
      Alan Chester reported an issue with IPv6 on SCTP that IPsec traffic is not
      being encrypted, whereas on IPv4 it is. Setting up an AH + ESP transport
      does not seem to have the desired effect:
      
      SCTP + IPv4:
      
        22:14:20.809645 IP (tos 0x2,ECT(0), ttl 64, id 0, offset 0, flags [DF], proto AH (51), length 116)
          192.168.0.2 > 192.168.0.5: AH(spi=0x00000042,sumlen=16,seq=0x1): ESP(spi=0x00000044,seq=0x1), length 72
        22:14:20.813270 IP (tos 0x2,ECT(0), ttl 64, id 0, offset 0, flags [DF], proto AH (51), length 340)
          192.168.0.5 > 192.168.0.2: AH(spi=0x00000043,sumlen=16,seq=0x1):
      
      SCTP + IPv6:
      
        22:31:19.215029 IP6 (class 0x02, hlim 64, next-header SCTP (132) payload length: 364)
          fe80::222:15ff:fe87:7fc.3333 > fe80::92e6:baff:fe0d:5a54.36767: sctp
          1) [INIT ACK] [init tag: 747759530] [rwnd: 62464] [OS: 10] [MIS: 10]
      
      Moreover, Alan says:
      
        This problem was seen with both Racoon and Racoon2. Other people have seen
        this with OpenSwan. When IPsec is configured to encrypt all upper layer
        protocols the SCTP connection does not initialize. After using Wireshark to
        follow packets, this is because the SCTP packet leaves Box A unencrypted and
        Box B believes all upper layer protocols are to be encrypted so it drops
        this packet, causing the SCTP connection to fail to initialize. When IPsec
        is configured to encrypt just SCTP, the SCTP packets are observed unencrypted.
      
      In fact, using `socat sctp6-listen:3333 -` on one end and transferring "plaintext"
      string on the other end, results in cleartext on the wire where SCTP eventually
      does not report any errors, thus in the latter case that Alan reports, the
      non-paranoid user might think he's communicating over an encrypted transport on
      SCTP although he's not (tcpdump ... -X):
      
        ...
        0x0030: 5d70 8e1a 0003 001a 177d eb6c 0000 0000  ]p.......}.l....
        0x0040: 0000 0000 706c 6169 6e74 6578 740a 0000  ....plaintext...
      
      Only in /proc/net/xfrm_stat we can see XfrmInTmplMismatch increasing on the
      receiver side. Initial follow-up analysis from Alan's bug report was done by
      Alexey Dobriyan. Also thanks to Vlad Yasevich for feedback on this.
      
      SCTP has its own implementation of sctp_v6_xmit() not calling inet6_csk_xmit().
      This has the implication that it probably never really got updated along with
      changes in inet6_csk_xmit() and therefore does not seem to invoke xfrm handlers.
      
      SCTP's IPv4 xmit however, properly calls ip_queue_xmit() to do the work. Since
      a call to inet6_csk_xmit() would solve this problem, but result in unecessary
      route lookups, let us just use the cached flowi6 instead that we got through
      sctp_v6_get_dst(). Since all SCTP packets are being sent through sctp_packet_transmit(),
      we do the route lookup / flow caching in sctp_transport_route(), hold it in
      tp->dst and skb_dst_set() right after that. If we would alter fl6->daddr in
      sctp_v6_xmit() to np->opt->srcrt, we possibly could run into the same effect
      of not having xfrm layer pick it up, hence, use fl6_update_dst() in sctp_v6_get_dst()
      instead to get the correct source routed dst entry, which we assign to the skb.
      
      Also source address routing example from 62503411 ("sctp: fix sctp to work with
      ipv6 source address routing") still works with this patch! Nevertheless, in RFC5095
      it is actually 'recommended' to not use that anyway due to traffic amplification [1].
      So it seems we're not supposed to do that anyway in sctp_v6_xmit(). Moreover, if
      we overwrite the flow destination here, the lower IPv6 layer will be unable to
      put the correct destination address into IP header, as routing header is added in
      ipv6_push_nfrag_opts() but then probably with wrong final destination. Things aside,
      result of this patch is that we do not have any XfrmInTmplMismatch increase plus on
      the wire with this patch it now looks like:
      
      SCTP + IPv6:
      
        08:17:47.074080 IP6 2620:52:0:102f:7a2b:cbff:fe27:1b0a > 2620:52:0:102f:213:72ff:fe32:7eba:
          AH(spi=0x00005fb4,seq=0x1): ESP(spi=0x00005fb5,seq=0x1), length 72
        08:17:47.074264 IP6 2620:52:0:102f:213:72ff:fe32:7eba > 2620:52:0:102f:7a2b:cbff:fe27:1b0a:
          AH(spi=0x00003d54,seq=0x1): ESP(spi=0x00003d55,seq=0x1), length 296
      
      This fixes Kernel Bugzilla 24412. This security issue seems to be present since
      2.6.18 kernels. Lets just hope some big passive adversary in the wild didn't have
      its fun with that. lksctp-tools IPv6 regression test suite passes as well with
      this patch.
      
       [1] http://www.secdev.org/conf/IPv6_RH_security-csw07.pdfReported-by: default avatarAlan Chester <alan.chester@tekelec.com>
      Reported-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
      Signed-off-by: default avatarDaniel Borkmann <dborkman@redhat.com>
      Cc: Steffen Klassert <steffen.klassert@secunet.com>
      Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
      Acked-by: default avatarVlad Yasevich <vyasevich@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      95ee6208
    • Jason Wang's avatar
      tuntap: correctly handle error in tun_set_iff() · 662ca437
      Jason Wang authored
      Commit c8d68e6b
      (tuntap: multiqueue support) only call free_netdev() on error in
      tun_set_iff(). This causes several issues:
      
      - memory of tun security were leaked
      - use after free since the flow gc timer was not deleted and the tfile
        were not detached
      
      This patch solves the above issues.
      Reported-by: default avatarWannes Rombouts <wannes.rombouts@epitech.eu>
      Cc: Michael S. Tsirkin <mst@redhat.com>
      Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
      Acked-by: default avatarMichael S. Tsirkin <mst@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      662ca437
    • Kees Cook's avatar
      xen-netback: fix possible format string flaw · a9677bc0
      Kees Cook authored
      This makes sure a format string cannot accidentally leak into the
      kthread_run() call.
      Signed-off-by: default avatarKees Cook <keescook@chromium.org>
      Acked-by: default avatarIan Campbell <ian.campbell@citrix.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a9677bc0
    • Sonic Zhang's avatar
      netpoll: Should handle ETH_P_ARP other than ETH_P_IP in netpoll_neigh_reply · b0dd663b
      Sonic Zhang authored
      The received ARP request type in the Ethernet packet head is ETH_P_ARP other than ETH_P_IP.
      
      [ Bug introduced by commit b7394d24
        ("netpoll: prepare for ipv6") ]
      Signed-off-by: default avatarSonic Zhang <sonic.zhang@analog.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b0dd663b
    • Fujinaka, Todd's avatar
      igb: Read flow control for i350 from correct EEPROM section · c7cb020d
      Fujinaka, Todd authored
      Flow control is defined in the four EEPROM sections but the driver only reads
      from section 0.
      Signed-off-by: default avatarTodd Fujinaka <todd.fujinaka@intel.com>
      Tested-by: default avatarAaron Brown <aaron.f.brown@intel.com>
      Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c7cb020d
    • Carolyn Wyborny's avatar
      igb: Add additional get_phy_id call for i354 devices · bb1d18d1
      Carolyn Wyborny authored
      This patch fixes a problem where some ports can fail to initialize on a
      cold boot. This patch adds an additional call to read the PHY id for i354
      devices in order workaround the hardware problem.
      Signed-off-by: default avatarCarolyn Wyborny <carolyn.wyborny@intel.com>
      Tested-by: default avatarAaron Brown <aaron.f.brown@intel.com>
      Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      bb1d18d1
    • David S. Miller's avatar
      Merge tag 'master-2013-09-09' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless · 732bf15e
      David S. Miller authored
      John W. Linville says:
      
      ====================
      This is a pull request for a few early fixes for the 3.12 stream.
      
      Alexey Khoroshilov corrects a use-after-free issue on rtl8187 found
      by the Linux Driver Verification project.
      
      Arend van Spriel provides a brcmfmac patch to fix a build issue
      reported by Randy Dunlap.
      
      Hauke Mehrtens offers a bcma fix to properly account for the storage
      width of error code values before checking them.
      
      Solomon Peachy brings a pair of cw1200 fixes to avoid hangs in that
      driver with SPI devices.  One avoids transfers in interrupt context,
      the other fixes a locking issue.
      
      Stanislaw Gruszka changes the initialization of the rt2800 driver to
      avoid a freeze, addressing a bug in the Red Hat bugzilla.
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      732bf15e
    • françois romieu's avatar
      r8169: enforce RX_MULTI_EN for the 8168f. · 3ced8c95
      françois romieu authored
      Same narrative as eb2dc35d ("r8169: RxConfig
      hack for the 8168evl.") regarding AMD IOMMU errors.
      
      RTL_GIGA_MAC_VER_36 - 8168f as well - has not been reported to behave the
      same.
      Tested-by: default avatarDavid R <david@unsolicited.net>
      Tested-by: default avatarFrédéric Leroy <fredo@starox.org>
      Cc: Hayes Wang <hayeswang@realtek.com>
      Signed-off-by: default avatarFrancois Romieu <romieu@fr.zoreil.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      3ced8c95
    • Linus Torvalds's avatar
      Bye, bye, WfW flag · d5d04bb4
      Linus Torvalds authored
      This reverts the Linux for Workgroups thing.  And no, before somebody
      asks, we're not doing Linux95.  Not for a few years, at least.
      
      Sure, the flag added some color to the logo, and could have remained as
      a testament to my leet gimp skills.  But no.  And I'll do this early, to
      avoid the chance of forgetting when I'm doing the actual rc1 release on
      the road.
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      d5d04bb4
    • Linus Torvalds's avatar
      Merge tag 'ecryptfs-3.12-rc1-crypt-ctx' of... · 1ae276a9
      Linus Torvalds authored
      Merge tag 'ecryptfs-3.12-rc1-crypt-ctx' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs
      
      Pull eCryptfs fixes from Tyler Hicks:
       "Two small fixes to the code that initializes the per-file crypto
        contexts"
      
      * tag 'ecryptfs-3.12-rc1-crypt-ctx' of git://git.kernel.org/pub/scm/linux/kernel/git/tyhicks/ecryptfs:
        ecryptfs: avoid ctx initialization race
        ecryptfs: remove check for if an array is NULL
      1ae276a9
    • Linus Torvalds's avatar
      Merge branch 'for-v3.12-fix' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping · 3b38f56c
      Linus Torvalds authored
      Pull DMA-mapping fix from Marek Szyprowski:
       "A build bugfix for the device tree support for reserved memory
        regions.  Due to superfluous include the common code failed to build
        on ARM64 and MIPS architectures.
      
        The patch that caused the build break has lived at linux-next for
        about two weeks and noone noticed the issue, what convinced me that
        everything was ok"
      
      * 'for-v3.12-fix' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping:
        drivers: of: fix build break if asm/dma-contiguous.h is missing
      3b38f56c
    • Linus Torvalds's avatar
      Merge tag 'for-3.12' of git://git.linaro.org/people/sumitsemwal/linux-dma-buf · b3b75684
      Linus Torvalds authored
      Pull dma-buf updates from Sumit Semwal:
       "Yet another small one - dma-buf framework now supports size discovery
        of the buffer via llseek"
      
      * tag 'for-3.12' of git://git.linaro.org/people/sumitsemwal/linux-dma-buf:
        dma-buf: Expose buffer size to userspace (v2)
        dma-buf: Check return value of anon_inode_getfile
      b3b75684
  3. 11 Sep, 2013 23 commits