1. 02 Aug, 2018 1 commit
    • Russell King's avatar
      ARM: vfp: use __copy_from_user() when restoring VFP state · 42019fc5
      Russell King authored
      
      
      __get_user_error() is used as a fast accessor to make copying structure
      members in the signal handling path as efficient as possible.  However,
      with software PAN and the recent Spectre variant 1, the efficiency is
      reduced as these are no longer fast accessors.
      
      In the case of software PAN, it has to switch the domain register around
      each access, and with Spectre variant 1, it would have to repeat the
      access_ok() check for each access.
      
      Use __copy_from_user() rather than __get_user_err() for individual
      members when restoring VFP state.
      Acked-by: default avatarMark Rutland <mark.rutland@arm.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      42019fc5
  2. 26 Jul, 2018 1 commit
    • Russell King's avatar
      ARM: signal: copy registers using __copy_from_user() · c32cd419
      Russell King authored
      
      
      __get_user_error() is used as a fast accessor to make copying structure
      members in the signal handling path as efficient as possible.  However,
      with software PAN and the recent Spectre variant 1, the efficiency is
      reduced as these are no longer fast accessors.
      
      In the case of software PAN, it has to switch the domain register around
      each access, and with Spectre variant 1, it would have to repeat the
      access_ok() check for each access.
      
      It becomes much more efficient to use __copy_from_user() instead, so
      let's use this for the ARM integer registers.
      Acked-by: default avatarMark Rutland <mark.rutland@arm.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
      c32cd419
  3. 31 May, 2018 18 commits
  4. 01 Apr, 2018 1 commit
  5. 31 Mar, 2018 5 commits
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 10b84dad
      Linus Torvalds authored
      Pull perf fixes from Ingo Molnar:
       "Two fixlets"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf/hwbp: Simplify the perf-hwbp code, fix documentation
        perf/x86/intel: Fix linear IP of PEBS real_ip on Haswell and later CPUs
      10b84dad
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · ad0500ca
      Linus Torvalds authored
      Pull x86 fixes from Ingo Molnar:
       "Two UV platform fixes, and a kbuild fix"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/platform/UV: Fix critical UV MMR address error
        x86/platform/uv/BAU: Add APIC idt entry
        x86/purgatory: Avoid creating stray .<pid>.d files, remove -MD from KBUILD_CFLAGS
      ad0500ca
    • Linus Torvalds's avatar
      Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 93e04d4a
      Linus Torvalds authored
      Pull x86 PTI fixes from Ingo Molnar:
       "Two fixes: a relatively simple objtool fix that makes Clang built
        kernels work with ORC debug info, plus an alternatives macro fix"
      
      * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/alternatives: Fixup alternative_call_2
        objtool: Add Clang support
      93e04d4a
    • Linus Torvalds's avatar
      Merge tag 'kbuild-fixes-v4.16-3' of... · b5dbc287
      Linus Torvalds authored
      Merge tag 'kbuild-fixes-v4.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
      
      Pull Kbuild fixes from Masahiro Yamada:
      
       - fix missed rebuild of TRIM_UNUSED_KSYMS
      
       - fix rpm-pkg for GNU tar >= 1.29
      
       - include scripts/dtc/include-prefixes/* to kernel header deb-pkg
      
       - add -no-integrated-as option ealier to fix building with Clang
      
       - fix netfilter Makefile for parallel building
      
      * tag 'kbuild-fixes-v4.16-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
        netfilter: nf_nat_snmp_basic: add correct dependency to Makefile
        kbuild: rpm-pkg: Support GNU tar >= 1.29
        builddeb: Fix header package regarding dtc source links
        kbuild: set no-integrated-as before incl. arch Makefile
        kbuild: make scripts/adjust_autoksyms.sh robust against timestamp races
      b5dbc287
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · a44406ec
      Linus Torvalds authored
      Pull networking fixes from David Miller:
      
       1) Fix RCU locking in xfrm_local_error(), from Taehee Yoo.
      
       2) Fix return value assignments and thus error checking in
          iwl_mvm_start_ap_ibss(), from Johannes Berg.
      
       3) Don't count header length twice in vti4, from Stefano Brivio.
      
       4) Fix deadlock in rt6_age_examine_exception, from Eric Dumazet.
      
       5) Fix out-of-bounds access in nf_sk_lookup_slow{v4,v6}() from Subash
          Abhinov.
      
       6) Check nladdr size in netlink_connect(), from Alexander Potapenko.
      
       7) VF representor SQ numbers are 32 not 16 bits, in mlx5 driver, from
          Or Gerlitz.
      
       8) Out of bounds read in skb_network_protocol(), from Eric Dumazet.
      
       9) r8169 driver sets driver data pointer after register_netdev() which
          is too late. Fix from Heiner Kallweit.
      
      10) Fix memory leak in mlx4 driver, from Moshe Shemesh.
      
      11) The multi-VLAN decap fix added a regression when dealing with device
          that lack a MAC header, such as tun. Fix from Toshiaki Makita.
      
      12) Fix integer overflow in dynamic interrupt coalescing code. From Tal
          Gilboa.
      
      13) Use after free in vrf code, from David Ahern.
      
      14) IPV6 route leak between VRFs fix, also from David Ahern.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (81 commits)
        net: mvneta: fix enable of all initialized RXQs
        net/ipv6: Fix route leaking between VRFs
        vrf: Fix use after free and double free in vrf_finish_output
        ipv6: sr: fix seg6 encap performances with TSO enabled
        net/dim: Fix int overflow
        vlan: Fix vlan insertion for packets without ethernet header
        net: Fix untag for vlan packets without ethernet header
        atm: iphase: fix spelling mistake: "Receiverd" -> "Received"
        vhost: validate log when IOTLB is enabled
        qede: Do not drop rx-checksum invalidated packets.
        hv_netvsc: enable multicast if necessary
        ip_tunnel: Resolve ipsec merge conflict properly.
        lan78xx: Crash in lan78xx_writ_reg (Workqueue: events lan78xx_deferred_multicast_write)
        qede: Fix barrier usage after tx doorbell write.
        vhost: correctly remove wait queue during poll failure
        net/mlx4_core: Fix memory leak while delete slave's resources
        net/mlx4_en: Fix mixed PFC and Global pause user control requests
        net/smc: use announced length in sock_recvmsg()
        llc: properly handle dev_queue_xmit() return value
        strparser: Fix sign of err codes
        ...
      a44406ec
  6. 30 Mar, 2018 14 commits
    • Yelena Krivosheev's avatar
      net: mvneta: fix enable of all initialized RXQs · e81b5e01
      Yelena Krivosheev authored
      
      
      In mvneta_port_up() we enable relevant RX and TX port queues by write
      queues bit map to an appropriate register.
      
      q_map must be ZERO in the beginning of this process.
      Signed-off-by: default avatarYelena Krivosheev <yelena@marvell.com>
      Signed-off-by: default avatarGregory CLEMENT <gregory.clement@bootlin.com>
      Acked-by: default avatarThomas Petazzoni <thomas.petazzoni@bootlin.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      e81b5e01
    • David Ahern's avatar
      net/ipv6: Fix route leaking between VRFs · b6cdbc85
      David Ahern authored
      Donald reported that IPv6 route leaking between VRFs is not working.
      The root cause is the strict argument in the call to rt6_lookup when
      validating the nexthop spec.
      
      ip6_route_check_nh validates the gateway and device (if given) of a
      route spec. It in turn could call rt6_lookup (e.g., lookup in a given
      table did not succeed so it falls back to a full lookup) and if so
      sets the strict argument to 1. That means if the egress device is given,
      the route lookup needs to return a result with the same device. This
      strict requirement does not work with VRFs (IPv4 or IPv6) because the
      oif in the flow struct is overridden with the index of the VRF device
      to trigger a match on the l3mdev rule and force the lookup to its table.
      
      The right long term solution is to add an l3mdev index to the flow
      struct such that the oif is not overridden. That solution will not
      backport well, so this patch aims for a simpler solution to relax the
      strict argument if the route spec device is an l3mdev slave. As done
      in other places, use the FLOWI_FLAG_SKIP_NH_OIF to know that the
      RT6_LOOKUP_F_IFACE flag needs to be removed.
      
      Fixes: ca254490
      
       ("net: Add VRF support to IPv6 stack")
      Reported-by: default avatarDonald Sharp <sharpd@cumulusnetworks.com>
      Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b6cdbc85
    • David Ahern's avatar
      vrf: Fix use after free and double free in vrf_finish_output · 82dd0d2a
      David Ahern authored
      Miguel reported an skb use after free / double free in vrf_finish_output
      when neigh_output returns an error. The vrf driver should return after
      the call to neigh_output as it takes over the skb on error path as well.
      
      Patch is a simplified version of Miguel's patch which was written for 4.9,
      and updated to top of tree.
      
      Fixes: 8f58336d
      
       ("net: Add ethernet header for pass through VRF device")
      Signed-off-by: default avatarMiguel Fadon Perlines <mfadon@teldat.com>
      Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      82dd0d2a
    • David Lebrun's avatar
      ipv6: sr: fix seg6 encap performances with TSO enabled · 5807b22c
      David Lebrun authored
      
      
      Enabling TSO can lead to abysmal performances when using seg6 in
      encap mode, such as with the ixgbe driver. This patch adds a call to
      iptunnel_handle_offloads() to remove the encapsulation bit if needed.
      
      Before:
      root@comp4-seg6bpf:~# iperf3 -c fc00::55
      Connecting to host fc00::55, port 5201
      [  4] local fc45::4 port 36592 connected to fc00::55 port 5201
      [ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
      [  4]   0.00-1.00   sec   196 KBytes  1.60 Mbits/sec   47   6.66 KBytes
      [  4]   1.00-2.00   sec   304 KBytes  2.49 Mbits/sec  100   5.33 KBytes
      [  4]   2.00-3.00   sec   284 KBytes  2.32 Mbits/sec   92   5.33 KBytes
      
      After:
      root@comp4-seg6bpf:~# iperf3 -c fc00::55
      Connecting to host fc00::55, port 5201
      [  4] local fc45::4 port 43062 connected to fc00::55 port 5201
      [ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
      [  4]   0.00-1.00   sec  1.03 GBytes  8.89 Gbits/sec    0    743 KBytes
      [  4]   1.00-2.00   sec  1.03 GBytes  8.87 Gbits/sec    0    743 KBytes
      [  4]   2.00-3.00   sec  1.03 GBytes  8.87 Gbits/sec    0    743 KBytes
      Reported-by: default avatarTom Herbert <tom@quantonium.net>
      Fixes: 6c8702c6
      
       ("ipv6: sr: add support for SRH encapsulation and injection with lwtunnels")
      Signed-off-by: default avatarDavid Lebrun <dlebrun@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5807b22c
    • Linus Torvalds's avatar
      Merge tag 'ceph-for-4.16-rc8' of git://github.com/ceph/ceph-client · 9dd23268
      Linus Torvalds authored
      Pull ceph fix from Ilya Dryomov:
       "A fix for a dio-enabled loop on ceph deadlock from Zheng, marked for
        stable"
      
      * tag 'ceph-for-4.16-rc8' of git://github.com/ceph/ceph-client:
        ceph: only dirty ITER_IOVEC pages for direct read
      9dd23268
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 72573481
      Linus Torvalds authored
      Pull KVM fixes from Radim Krčmář:
       "PPC:
         - Fix a bug causing occasional machine check exceptions on POWER8
           hosts (introduced in 4.16-rc1)
      
        x86:
         - Fix a guest crashing regression with nested VMX and restricted
           guest (introduced in 4.16-rc1)
      
         - Fix dependency check for pv tlb flush (the wrong dependency that
           effectively disabled the feature was added in 4.16-rc4, the
           original feature in 4.16-rc1, so it got decent testing)"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        KVM: x86: Fix pv tlb flush dependencies
        KVM: nVMX: sync vmcs02 segment regs prior to vmx_set_cr0
        KVM: PPC: Book3S HV: Fix duplication of host SLB entries
      72573481
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · bd886137
      Linus Torvalds authored
      Pull i2c fix from Wolfram Sang:
       "A simple but worthwhile I2C driver fix for 4.16"
      
      * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        i2c: i2c-stm32f7: fix no check on returned setup
      bd886137
    • Linus Torvalds's avatar
      Merge tag 'sound-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · ef82f598
      Linus Torvalds authored
      Pull sound fixes from Takashi Iwai:
       "Very small fixes (all one-liners) at this time.
      
        One fix is for a PCM core stuff to correct the mmap behavior on
        non-x86. It doesn't show on most machines but mostly only for exotic
        non-interleaved formats"
      
      * tag 'sound-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
        ALSA: pcm: potential uninitialized return values
        ALSA: pcm: Use dma_bytes as size parameter in dma_mmap_coherent()
        ALSA: usb-audio: Add native DSD support for TEAC UD-301
      ef82f598
    • Tal Gilboa's avatar
      net/dim: Fix int overflow · f97c3dc3
      Tal Gilboa authored
      When calculating difference between samples, the values
      are multiplied by 100. Large values may cause int overflow
      when multiplied (usually on first iteration).
      Fixed by forcing 100 to be of type unsigned long.
      
      Fixes: 4c4dbb4a
      
       ("net/mlx5e: Move dynamic interrupt coalescing code to include/linux")
      Signed-off-by: default avatarTal Gilboa <talgi@mellanox.com>
      Reviewed-by: default avatarAndy Gospodarek <gospo@broadcom.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f97c3dc3
    • David S. Miller's avatar
      Merge branch 'vlan-fix' · 52a9692a
      David S. Miller authored
      Toshiaki Makita says:
      
      ====================
      Fix vlan tag handling for vlan packets without ethernet headers
      
      Eric Dumazet reported syzbot found a new bug which leads to underflow of
      size argument of memmove(), causing crash[1]. This can be triggered by tun
      devices.
      
      The underflow happened because skb_vlan_untag() did not expect vlan packets
      without ethernet headers, and tun can produce such packets.
      I also checked vlan_insert_inner_tag() and found a similar bug.
      
      This series fixes these problems.
      
      [1] https://marc.info/?l=linux-netdev&m=152221753920510&w=2
      
      
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      52a9692a
    • Toshiaki Makita's avatar
      vlan: Fix vlan insertion for packets without ethernet header · c769accd
      Toshiaki Makita authored
      In some situation vlan packets do not have ethernet headers. One example
      is packets from tun devices. Users can specify vlan protocol in tun_pi
      field instead of IP protocol. When we have a vlan device with reorder_hdr
      disabled on top of the tun device, such packets from tun devices are
      untagged in skb_vlan_untag() and vlan headers will be inserted back in
      vlan_insert_inner_tag().
      
      vlan_insert_inner_tag() however did not expect packets without ethernet
      headers, so in such a case size argument for memmove() underflowed.
      
      We don't need to copy headers for packets which do not have preceding
      headers of vlan headers, so skip memmove() in that case.
      Also don't write vlan protocol in skb->data when it does not have enough
      room for it.
      
      Fixes: cbe7128c
      
       ("vlan: Fix out of order vlan headers with reorder header off")
      Signed-off-by: default avatarToshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c769accd
    • Toshiaki Makita's avatar
      net: Fix untag for vlan packets without ethernet header · ae474573
      Toshiaki Makita authored
      In some situation vlan packets do not have ethernet headers. One example
      is packets from tun devices. Users can specify vlan protocol in tun_pi
      field instead of IP protocol, and skb_vlan_untag() attempts to untag such
      packets.
      
      skb_vlan_untag() (more precisely, skb_reorder_vlan_header() called by it)
      however did not expect packets without ethernet headers, so in such a case
      size argument for memmove() underflowed and triggered crash.
      
      ====
      BUG: unable to handle kernel paging request at ffff8801cccb8000
      IP: __memmove+0x24/0x1a0 arch/x86/lib/memmove_64.S:43
      PGD 9cee067 P4D 9cee067 PUD 1d9401063 PMD 1cccb7063 PTE 2810100028101
      Oops: 000b [#1] SMP KASAN
      Dumping ftrace buffer:
         (ftrace buffer empty)
      Modules linked in:
      CPU: 1 PID: 17663 Comm: syz-executor2 Not tainted 4.16.0-rc7+ #368
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
      RIP: 0010:__memmove+0x24/0x1a0 arch/x86/lib/memmove_64.S:43
      RSP: 0018:ffff8801cc046e28 EFLAGS: 00010287
      RAX: ffff8801ccc244c4 RBX: fffffffffffffffe RCX: fffffffffff6c4c2
      RDX: fffffffffffffffe RSI: ffff8801cccb7ffc RDI: ffff8801cccb8000
      RBP: ffff8801cc046e48 R08: ffff8801ccc244be R09: ffffed0039984899
      R10: 0000000000000001 R11: ffffed0039984898 R12: ffff8801ccc244c4
      R13: ffff8801ccc244c0 R14: ffff8801d96b7c06 R15: ffff8801d96b7b40
      FS:  00007febd562d700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
      CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      CR2: ffff8801cccb8000 CR3: 00000001ccb2f006 CR4: 00000000001606e0
      DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
      DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
      Call Trace:
       memmove include/linux/string.h:360 [inline]
       skb_reorder_vlan_header net/core/skbuff.c:5031 [inline]
       skb_vlan_untag+0x470/0xc40 net/core/skbuff.c:5061
       __netif_receive_skb_core+0x119c/0x3460 net/core/dev.c:4460
       __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4627
       netif_receive_skb_internal+0x10b/0x670 net/core/dev.c:4701
       netif_receive_skb+0xae/0x390 net/core/dev.c:4725
       tun_rx_batched.isra.50+0x5ee/0x870 drivers/net/tun.c:1555
       tun_get_user+0x299e/0x3c20 drivers/net/tun.c:1962
       tun_chr_write_iter+0xb9/0x160 drivers/net/tun.c:1990
       call_write_iter include/linux/fs.h:1782 [inline]
       new_sync_write fs/read_write.c:469 [inline]
       __vfs_write+0x684/0x970 fs/read_write.c:482
       vfs_write+0x189/0x510 fs/read_write.c:544
       SYSC_write fs/read_write.c:589 [inline]
       SyS_write+0xef/0x220 fs/read_write.c:581
       do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
       entry_SYSCALL_64_after_hwframe+0x42/0xb7
      RIP: 0033:0x454879
      RSP: 002b:00007febd562cc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
      RAX: ffffffffffffffda RBX: 00007febd562d6d4 RCX: 0000000000454879
      RDX: 0000000000000157 RSI: 0000000020000180 RDI: 0000000000000014
      RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
      R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
      R13: 00000000000006b0 R14: 00000000006fc120 R15: 0000000000000000
      Code: 90 90 90 90 90 90 90 48 89 f8 48 83 fa 20 0f 82 03 01 00 00 48 39 fe 7d 0f 49 89 f0 49 01 d0 49 39 f8 0f 8f 9f 00 00 00 48 89 d1 <f3> a4 c3 48 81 fa a8 02 00 00 72 05 40 38 fe 74 3b 48 83 ea 20
      RIP: __memmove+0x24/0x1a0 arch/x86/lib/memmove_64.S:43 RSP: ffff8801cc046e28
      CR2: ffff8801cccb8000
      ====
      
      We don't need to copy headers for packets which do not have preceding
      headers of vlan headers, so skip memmove() in that case.
      
      Fixes: 4bbb3e0e
      
       ("net: Fix vlan untag for bridge and vlan_dev with reorder_hdr off")
      Reported-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: default avatarToshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      ae474573
    • Colin Ian King's avatar
      atm: iphase: fix spelling mistake: "Receiverd" -> "Received" · a9645b27
      Colin Ian King authored
      
      
      Trivial fix to spelling mistake in message text
      Signed-off-by: default avatarColin Ian King <colin.king@canonical.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a9645b27
    • Yan, Zheng's avatar
      ceph: only dirty ITER_IOVEC pages for direct read · 85784f93
      Yan, Zheng authored
      
      
      If a page is already locked, attempting to dirty it leads to a deadlock
      in lock_page().  This is what currently happens to ITER_BVEC pages when
      a dio-enabled loop device is backed by ceph:
      
        $ losetup --direct-io /dev/loop0 /mnt/cephfs/img
        $ xfs_io -c 'pread 0 4k' /dev/loop0
      
      Follow other file systems and only dirty ITER_IOVEC pages.
      
      Cc: stable@kernel.org
      Signed-off-by: default avatar"Yan, Zheng" <zyan@redhat.com>
      Reviewed-by: default avatarIlya Dryomov <idryomov@gmail.com>
      Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
      85784f93