1. 18 8月, 2017 5 次提交
  2. 17 8月, 2017 5 次提交
  3. 16 8月, 2017 20 次提交
    • W
      perf bpf: Fix endianness problem when loading parameters in prologue · db26984a
      Wang Nan 提交于
      Perf's BPF prologue generator unconditionally fetches 8 bytes for
      function parameters, which causes problems on big endian machines. Thomas
      gives a detailed analysis for this problem:
      
       http://lkml.kernel.org/r/968ebda5-abe4-8830-8d69-49f62529d151@linux.vnet.ibm.com
      
       ---- 8< ----
        I investigated perf test BPF for s390x and have a question regarding
        the 38.3 subtest (bpf-prologue test) which fails on s390x.
      
        When I turn on trace_printk in tests/bpf-script-test-prologue.c
        I see this output in /sys/kernel/debug/tracing/trace:
      
        [root@s8360047 perf]# cat /sys/kernel/debug/tracing/trace
        perf-30229 [000] d..2 170161.535791: : f_mode 2001d00000000 offset:0 orig:0
        perf-30229 [000] d..2 170161.535809: : f_mode 6001f00000000 offset:0 orig:0
        perf-30229 [000] d..2 170161.535815: : f_mode 6001f00000000 offset:1 orig:0
        perf-30229 [000] d..2 170161.535819: : f_mode 2001d00000000 offset:1 orig:0
        perf-30229 [000] d..2 170161.535822: : f_mode 2001d00000000 offset:2 orig:1
        perf-30229 [000] d..2 170161.535825: : f_mode 6001f00000000 offset:2 orig:1
        perf-30229 [000] d..2 170161.535828: : f_mode 6001f00000000 offset:3 orig:1
        perf-30229 [000] d..2 170161.535832: : f_mode 2001d00000000 offset:3 orig:1
        perf-30229 [000] d..2 170161.535835: : f_mode 2001d00000000 offset:4 orig:0
        perf-30229 [000] d..2 170161.535841: : f_mode 6001f00000000 offset:4 orig:0
      
        [...]
      
        There are 3 parameters the eBPF program tests/bpf-script-test-prologue.c
        accesses: f_mode (member of struct file at offset 140) offset and orig.  They
        are parameters of the lseek() system call triggered in this test case in
        function llseek_loop().
      
        What is really strange is the value of f_mode. It is an 8 byte value, whereas
        in the probe event it is defined as a 4 byte value.  The lower 4 bytes are all
        zero and do not belong to member f_mode.  The correct value should be 2001d for
        read-only and 6001f for read-write open mode.
      
        Here is the output of the 'perf test -vv bpf' trace:
        Try to find probe point from debuginfo.
        Matched function: null_lseek [2d9310d]
         Probe point found: null_lseek+0
        Searching 'file' variable in context.
        Converting variable file into trace event.
        converting f_mode in file
        f_mode type is unsigned int.
        Opening /sys/kernel/debug/tracing//README write=0
        Searching 'offset' variable in context.
        Converting variable offset into trace event.
        offset type is long long int.
        Searching 'orig' variable in context.
        Converting variable orig into trace event.
        orig type is int.
        Found 1 probe_trace_events.
        Opening /sys/kernel/debug/tracing//kprobe_events write=1
        Writing event: p:perf_bpf_probe/func _text+8794224 f_mode=+140(%r2):x32
       ---- 8< ----
      
      This patch parses the type of each argument and converts data from memory to
      expected type.
      
      Now the test runs successfully on 4.13.0-rc5:
      
        [root@s8360046 perf]# ./perf test  bpf
        38: BPF filter                                 :
        38.1: Basic BPF filtering                      : Ok
        38.2: BPF pinning                              : Ok
        38.3: BPF prologue generation                  : Ok
        38.4: BPF relocation checker                   : Ok
        [root@s8360046 perf]#
      Signed-off-by: NWang Nan <wangnan0@huawei.com>
      Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
      Link: http://lkml.kernel.org/r/20170815092159.31912-1-tmricht@linux.vnet.ibm.comSigned-off-by: NThomas-Mich Richter <tmricht@linux.vnet.ibm.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      db26984a
    • L
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 510c8a89
      Linus Torvalds 提交于
      Pull networking fixes from David Miller:
      
       1) Fix TCP checksum offload handling in iwlwifi driver, from Emmanuel
          Grumbach.
      
       2) In ksz DSA tagging code, free SKB if skb_put_padto() fails. From
          Vivien Didelot.
      
       3) Fix two regressions with bonding on wireless, from Andreas Born.
      
       4) Fix build when busypoll is disabled, from Daniel Borkmann.
      
       5) Fix copy_linear_skb() wrt. SO_PEEK_OFF, from Eric Dumazet.
      
       6) Set SKB cached route properly in inet_rtm_getroute(), from Florian
          Westphal.
      
       7) Fix PCI-E relaxed ordering handling in cxgb4 driver, from Ding
          Tianhong.
      
       8) Fix module refcnt leak in ULP code, from Sabrina Dubroca.
      
       9) Fix use of GFP_KERNEL in atomic contexts in AF_KEY code, from Eric
          Dumazet.
      
      10) Need to purge socket write queue in dccp_destroy_sock(), also from
          Eric Dumazet.
      
      11) Make bpf_trace_printk() work properly on 32-bit architectures, from
          Daniel Borkmann.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (47 commits)
        bpf: fix bpf_trace_printk on 32 bit archs
        PCI: fix oops when try to find Root Port for a PCI device
        sfc: don't try and read ef10 data on non-ef10 NIC
        net_sched: remove warning from qdisc_hash_add
        net_sched/sfq: update hierarchical backlog when drop packet
        net_sched: reset pointers to tcf blocks in classful qdiscs' destructors
        ipv4: fix NULL dereference in free_fib_info_rcu()
        net: Fix a typo in comment about sock flags.
        ipv6: fix NULL dereference in ip6_route_dev_notify()
        tcp: fix possible deadlock in TCP stack vs BPF filter
        dccp: purge write queue in dccp_destroy_sock()
        udp: fix linear skb reception with PEEK_OFF
        ipv6: release rt6->rt6i_idev properly during ifdown
        af_key: do not use GFP_KERNEL in atomic contexts
        tcp: ulp: avoid module refcnt leak in tcp_set_ulp
        net/cxgb4vf: Use new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag
        net/cxgb4: Use new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag
        PCI: Disable Relaxed Ordering Attributes for AMD A1100
        PCI: Disable Relaxed Ordering for some Intel processors
        PCI: Disable PCIe Relaxed Ordering if unsupported
        ...
      510c8a89
    • D
      bpf: fix bpf_trace_printk on 32 bit archs · 88a5c690
      Daniel Borkmann 提交于
      James reported that on MIPS32 bpf_trace_printk() is currently
      broken while MIPS64 works fine:
      
        bpf_trace_printk() uses conditional operators to attempt to
        pass different types to __trace_printk() depending on the
        format operators. This doesn't work as intended on 32-bit
        architectures where u32 and long are passed differently to
        u64, since the result of C conditional operators follows the
        "usual arithmetic conversions" rules, such that the values
        passed to __trace_printk() will always be u64 [causing issues
        later in the va_list handling for vscnprintf()].
      
        For example the samples/bpf/tracex5 test printed lines like
        below on MIPS32, where the fd and buf have come from the u64
        fd argument, and the size from the buf argument:
      
          [...] 1180.941542: 0x00000001: write(fd=1, buf=  (null), size=6258688)
      
        Instead of this:
      
          [...] 1625.616026: 0x00000001: write(fd=1, buf=009e4000, size=512)
      
      One way to get it working is to expand various combinations
      of argument types into 8 different combinations for 32 bit
      and 64 bit kernels. Fix tested by James on MIPS32 and MIPS64
      as well that it resolves the issue.
      
      Fixes: 9c959c86 ("tracing: Allow BPF programs to call bpf_trace_printk()")
      Reported-by: NJames Hogan <james.hogan@imgtec.com>
      Tested-by: NJames Hogan <james.hogan@imgtec.com>
      Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      88a5c690
    • D
      PCI: fix oops when try to find Root Port for a PCI device · 0e405232
      dingtianhong 提交于
      Eric report a oops when booting the system after applying
      the commit a99b646a ("PCI: Disable PCIe Relaxed..."):
      
      [    4.241029] BUG: unable to handle kernel NULL pointer dereference at 0000000000000050
      [    4.247001] IP: pci_find_pcie_root_port+0x62/0x80
      [    4.253011] PGD 0
      [    4.253011] P4D 0
      [    4.253011]
      [    4.258013] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
      [    4.262015] Modules linked in:
      [    4.265005] CPU: 31 PID: 1 Comm: swapper/0 Not tainted 4.13.0-dbx-DEV #316
      [    4.271002] Hardware name: Intel RML,PCH/Iota_QC_19, BIOS 2.40.0 06/22/2016
      [    4.279002] task: ffffa2ee38cfa040 task.stack: ffffa51ec0004000
      [    4.285001] RIP: 0010:pci_find_pcie_root_port+0x62/0x80
      [    4.290012] RSP: 0000:ffffa51ec0007ab8 EFLAGS: 00010246
      [    4.295003] RAX: 0000000000000000 RBX: ffffa2ee36bae000 RCX: 0000000000000006
      [    4.303002] RDX: 000000000000081c RSI: ffffa2ee38cfa8c8 RDI: ffffa2ee36bae000
      [    4.310013] RBP: ffffa51ec0007b58 R08: 0000000000000001 R09: 0000000000000000
      [    4.317001] R10: 0000000000000000 R11: 0000000000000000 R12: ffffa51ec0007ad0
      [    4.324005] R13: ffffa2ee36bae098 R14: 0000000000000002 R15: ffffa2ee37204818
      [    4.331002] FS:  0000000000000000(0000) GS:ffffa2ee3fcc0000(0000) knlGS:0000000000000000
      [    4.339002] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      [    4.345001] CR2: 0000000000000050 CR3: 000000401000f000 CR4: 00000000001406e0
      [    4.351002] Call Trace:
      [    4.354012]  ? pci_configure_device+0x19f/0x570
      [    4.359002]  ? pci_conf1_read+0xb8/0xf0
      [    4.363002]  ? raw_pci_read+0x23/0x40
      [    4.366011]  ? pci_read+0x2c/0x30
      [    4.370014]  ? pci_read_config_word+0x67/0x70
      [    4.374012]  pci_device_add+0x28/0x230
      [    4.378012]  ? pci_vpd_f0_read+0x50/0x80
      [    4.382014]  pci_scan_single_device+0x96/0xc0
      [    4.386012]  pci_scan_slot+0x79/0xf0
      [    4.389001]  pci_scan_child_bus+0x31/0x180
      [    4.394014]  acpi_pci_root_create+0x1c6/0x240
      [    4.398013]  pci_acpi_scan_root+0x15f/0x1b0
      [    4.402012]  acpi_pci_root_add+0x2e6/0x400
      [    4.406012]  ? acpi_evaluate_integer+0x37/0x60
      [    4.411002]  acpi_bus_attach+0xdf/0x200
      [    4.415002]  acpi_bus_attach+0x6a/0x200
      [    4.418014]  acpi_bus_attach+0x6a/0x200
      [    4.422013]  acpi_bus_scan+0x38/0x70
      [    4.426011]  acpi_scan_init+0x10c/0x271
      [    4.429001]  acpi_init+0x2fa/0x348
      [    4.433004]  ? acpi_sleep_proc_init+0x2d/0x2d
      [    4.437001]  do_one_initcall+0x43/0x169
      [    4.441001]  kernel_init_freeable+0x1d0/0x258
      [    4.445003]  ? rest_init+0xe0/0xe0
      [    4.449001]  kernel_init+0xe/0x150
      
      ====================== cut here =============================
      
      It looks like the pci_find_pcie_root_port() was trying to
      find the Root Port for the PCI device which is the Root
      Port already, it will return NULL and trigger the problem,
      so check the highest_pcie_bridge to fix thie problem.
      
      Fixes: a99b646a ("PCI: Disable PCIe Relaxed Ordering if unsupported")
      Fixes: c56d4450 ("PCI: Turn off Request Attributes to avoid Chelsio T5 Completion erratum")
      Reported-by: NEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
      Signed-off-by: NDing Tianhong <dingtianhong@huawei.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      0e405232
    • B
      sfc: don't try and read ef10 data on non-ef10 NIC · 61deee96
      Bert Kenward 提交于
      The MAC stats command takes a port ID, which doesn't exist on
      pre-ef10 NICs (5000- and 6000- series). This is extracted from the
      NIC specific data; we misinterpret this as the ef10 data structure,
      causing us to read potentially unallocated data. With a KASAN kernel
      this can cause errors with:
         BUG: KASAN: slab-out-of-bounds in efx_mcdi_mac_stats
      
      Fixes: 0a2ab4d9 ("sfc: set the port-id when calling MC_CMD_MAC_STATS")
      Reported-by: NStefano Brivio <sbrivio@redhat.com>
      Tested-by: NStefano Brivio <sbrivio@redhat.com>
      Signed-off-by: NBert Kenward <bkenward@solarflare.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      61deee96
    • K
      net_sched: remove warning from qdisc_hash_add · c90e9514
      Konstantin Khlebnikov 提交于
      It was added in commit e57a784d ("pkt_sched: set root qdisc
      before change() in attach_default_qdiscs()") to hide duplicates
      from "tc qdisc show" for incative deivices.
      
      After 59cc1f61 ("net: sched: convert qdisc linked list to hashtable")
      it triggered when classful qdisc is added to inactive device because
      default qdiscs are added before switching root qdisc.
      
      Anyway after commit ea327469 ("net: sched: avoid duplicates in
      qdisc dump") duplicates are filtered right in dumper.
      Signed-off-by: NKonstantin Khlebnikov <khlebnikov@yandex-team.ru>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      c90e9514
    • K
      net_sched/sfq: update hierarchical backlog when drop packet · 325d5dc3
      Konstantin Khlebnikov 提交于
      When sfq_enqueue() drops head packet or packet from another queue it
      have to update backlog at upper qdiscs too.
      
      Fixes: 2ccccf5f ("net_sched: update hierarchical backlog too")
      Signed-off-by: NKonstantin Khlebnikov <khlebnikov@yandex-team.ru>
      Acked-by: NEric Dumazet <edumazet@google.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      325d5dc3
    • K
      net_sched: reset pointers to tcf blocks in classful qdiscs' destructors · 89890422
      Konstantin Khlebnikov 提交于
      Traffic filters could keep direct pointers to classes in classful qdisc,
      thus qdisc destruction first removes all filters before freeing classes.
      Class destruction methods also tries to free attached filters but now
      this isn't safe because tcf_block_put() unlike to tcf_destroy_chain()
      cannot be called second time.
      
      This patch set class->block to NULL after first tcf_block_put() and
      turn second call into no-op.
      
      Fixes: 6529eaba ("net: sched: introduce tcf block infractructure")
      Signed-off-by: NKonstantin Khlebnikov <khlebnikov@yandex-team.ru>
      Acked-by: NJiri Pirko <jiri@mellanox.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      89890422
    • E
      ipv4: fix NULL dereference in free_fib_info_rcu() · 187e5b3a
      Eric Dumazet 提交于
      If fi->fib_metrics could not be allocated in fib_create_info()
      we attempt to dereference a NULL pointer in free_fib_info_rcu() :
      
          m = fi->fib_metrics;
          if (m != &dst_default_metrics && atomic_dec_and_test(&m->refcnt))
                  kfree(m);
      
      Before my recent patch, we used to call kfree(NULL) and nothing wrong
      happened.
      
      Instead of using RCU to defer freeing while we are under memory stress,
      it seems better to take immediate action.
      
      This was reported by syzkaller team.
      
      Fixes: 3fb07daf ("ipv4: add reference counting to metrics")
      Signed-off-by: NEric Dumazet <edumazet@google.com>
      Reported-by: NDmitry Vyukov <dvyukov@google.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      187e5b3a
    • T
      b3dc8f77
    • E
      ipv6: fix NULL dereference in ip6_route_dev_notify() · 12d94a80
      Eric Dumazet 提交于
      Based on a syzkaller report [1], I found that a per cpu allocation
      failure in snmp6_alloc_dev() would then lead to NULL dereference in
      ip6_route_dev_notify().
      
      It seems this is a very old bug, thus no Fixes tag in this submission.
      
      Let's add in6_dev_put_clear() helper, as we will probably use
      it elsewhere (once available/present in net-next)
      
      [1]
      kasan: CONFIG_KASAN_INLINE enabled
      kasan: GPF could be caused by NULL-ptr deref or user memory access
      general protection fault: 0000 [#1] SMP KASAN
      Dumping ftrace buffer:
         (ftrace buffer empty)
      Modules linked in:
      CPU: 1 PID: 17294 Comm: syz-executor6 Not tainted 4.13.0-rc2+ #10
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
      task: ffff88019f456680 task.stack: ffff8801c6e58000
      RIP: 0010:__read_once_size include/linux/compiler.h:250 [inline]
      RIP: 0010:atomic_read arch/x86/include/asm/atomic.h:26 [inline]
      RIP: 0010:refcount_sub_and_test+0x7d/0x1b0 lib/refcount.c:178
      RSP: 0018:ffff8801c6e5f1b0 EFLAGS: 00010202
      RAX: 0000000000000037 RBX: dffffc0000000000 RCX: ffffc90005d25000
      RDX: ffff8801c6e5f218 RSI: ffffffff82342bbf RDI: 0000000000000001
      RBP: ffff8801c6e5f240 R08: 0000000000000001 R09: 0000000000000000
      R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff10038dcbe37
      R13: 0000000000000006 R14: 0000000000000001 R15: 00000000000001b8
      FS:  00007f21e0429700(0000) GS:ffff8801dc100000(0000) knlGS:0000000000000000
      CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      CR2: 0000001ddbc22000 CR3: 00000001d632b000 CR4: 00000000001426e0
      DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
      DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
      Call Trace:
       refcount_dec_and_test+0x1a/0x20 lib/refcount.c:211
       in6_dev_put include/net/addrconf.h:335 [inline]
       ip6_route_dev_notify+0x1c9/0x4a0 net/ipv6/route.c:3732
       notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93
       __raw_notifier_call_chain kernel/notifier.c:394 [inline]
       raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401
       call_netdevice_notifiers_info+0x51/0x90 net/core/dev.c:1678
       call_netdevice_notifiers net/core/dev.c:1694 [inline]
       rollback_registered_many+0x91c/0xe80 net/core/dev.c:7107
       rollback_registered+0x1be/0x3c0 net/core/dev.c:7149
       register_netdevice+0xbcd/0xee0 net/core/dev.c:7587
       register_netdev+0x1a/0x30 net/core/dev.c:7669
       loopback_net_init+0x76/0x160 drivers/net/loopback.c:214
       ops_init+0x10a/0x570 net/core/net_namespace.c:118
       setup_net+0x313/0x710 net/core/net_namespace.c:294
       copy_net_ns+0x27c/0x580 net/core/net_namespace.c:418
       create_new_namespaces+0x425/0x880 kernel/nsproxy.c:107
       unshare_nsproxy_namespaces+0xae/0x1e0 kernel/nsproxy.c:206
       SYSC_unshare kernel/fork.c:2347 [inline]
       SyS_unshare+0x653/0xfa0 kernel/fork.c:2297
       entry_SYSCALL_64_fastpath+0x1f/0xbe
      RIP: 0033:0x4512c9
      RSP: 002b:00007f21e0428c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000110
      RAX: ffffffffffffffda RBX: 0000000000718150 RCX: 00000000004512c9
      RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000062020200
      RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000
      R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004b973d
      R13: 00000000ffffffff R14: 000000002001d000 R15: 00000000000002dd
      Code: 50 2b 34 82 c7 00 f1 f1 f1 f1 c7 40 04 04 f2 f2 f2 c7 40 08 f3 f3
      f3 f3 e8 a1 43 39 ff 4c 89 f8 48 8b 95 70 ff ff ff 48 c1 e8 03 <0f> b6
      0c 18 4c 89 f8 83 e0 07 83 c0 03 38 c8 7c 08 84 c9 0f 85
      RIP: __read_once_size include/linux/compiler.h:250 [inline] RSP:
      ffff8801c6e5f1b0
      RIP: atomic_read arch/x86/include/asm/atomic.h:26 [inline] RSP:
      ffff8801c6e5f1b0
      RIP: refcount_sub_and_test+0x7d/0x1b0 lib/refcount.c:178 RSP:
      ffff8801c6e5f1b0
      ---[ end trace e441d046c6410d31 ]---
      Signed-off-by: NEric Dumazet <edumazet@google.com>
      Reported-by: NDmitry Vyukov <dvyukov@google.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      12d94a80
    • A
      perf script python: Add support for sqlite3 to call-graph-from-sql.py · 1fe03b5f
      Adrian Hunter 提交于
      Add support for SQLite 3 to the call-graph-from-sql.py script. The SQL
      statements work as is, so just detect the database type by checking if the
      SQLite 3 file exists.
      
      Committer notes:
      
      Tested collecting the PT data on a RHEL7.4, generating the SQLite3
      database there and then moving it to a Fedora 26 system where the
      call-graph-from-sql.py script was run, using python-pyside version
      1.2.2-7fc26 to see the callgraphs using Qt4.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      Link: http://lkml.kernel.org/r/1501749090-20357-6-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      1fe03b5f
    • J
      audit: Receive unmount event · b5fed474
      Jan Kara 提交于
      Although audit_watch_handle_event() can handle FS_UNMOUNT event, it is
      not part of AUDIT_FS_WATCH mask and thus such event never gets to
      audit_watch_handle_event(). Thus fsnotify marks are deleted by fsnotify
      subsystem on unmount without audit being notified about that which leads
      to a strange state of existing audit rules with dead fsnotify marks.
      
      Add FS_UNMOUNT to the mask of events to be received so that audit can
      clean up its state accordingly.
      Signed-off-by: NJan Kara <jack@suse.cz>
      Signed-off-by: NPaul Moore <paul@paul-moore.com>
      b5fed474
    • J
      audit: Fix use after free in audit_remove_watch_rule() · d76036ab
      Jan Kara 提交于
      audit_remove_watch_rule() drops watch's reference to parent but then
      continues to work with it. That is not safe as parent can get freed once
      we drop our reference. The following is a trivial reproducer:
      
      mount -o loop image /mnt
      touch /mnt/file
      auditctl -w /mnt/file -p wax
      umount /mnt
      auditctl -D
      <crash in fsnotify_destroy_mark()>
      
      Grab our own reference in audit_remove_watch_rule() earlier to make sure
      mark does not get freed under us.
      
      CC: stable@vger.kernel.org
      Reported-by: NTony Jones <tonyj@suse.de>
      Signed-off-by: NJan Kara <jack@suse.cz>
      Tested-by: NTony Jones <tonyj@suse.de>
      Signed-off-by: NPaul Moore <paul@paul-moore.com>
      d76036ab
    • L
      Merge tag 'linux-kselftest-4.13-rc6-fixes' of... · 40c6d1b9
      Linus Torvalds 提交于
      Merge tag 'linux-kselftest-4.13-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
      
      Pull kselftest fixes from Shuah Khan:
       "This update consists of important compile and run-time error fixes to
        timers/freq-step, kmod, and sysctl tests"
      
      * tag 'linux-kselftest-4.13-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
        selftests: timers: freq-step: fix compile error
        selftests: futex: fix run_tests target
        test_sysctl: fix sysctl.sh by making it executable
        test_kmod: fix kmod.sh by making it executable
      40c6d1b9
    • A
      perf script python: Rename call-graph-from-postgresql.py to call-graph-from-sql.py · 69e6e410
      Adrian Hunter 提交于
      Rename call-graph-from-postgresql.py to call-graph-from-sql.py in
      preparation for adding support to it for SQLite 3.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Link: http://lkml.kernel.org/r/1501749090-20357-5-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      69e6e410
    • A
      perf script python: Add support for exporting to sqlite3 · 564b9527
      Adrian Hunter 提交于
      Add support for exporting to SQLite 3 the same data as the PostgreSQL
      export.
      
      Committer note:
      
      Tested on RHEL 7.4 using the 1.2.2-4el python-pyside packages from EPEL.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      Link: http://lkml.kernel.org/r/1501749090-20357-4-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      564b9527
    • A
      perf scripts python: Fix query in call-graph-from-postgresql.py · 2295e9f8
      Adrian Hunter 提交于
      Add a missing space which seemed not to affect PostgreSQL but upsets
      SQLite.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Link: http://lkml.kernel.org/r/1501749090-20357-3-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      2295e9f8
    • A
      perf scripts python: Fix missing call_path_id in export-to-postgresql script · c8a82728
      Adrian Hunter 提交于
      The export does not work if only branches are exported because of a
      missing column in the samples table.  Fix by adding the missing
      call_path_id.
      
      Fixes: 3521f3bc ("perf script: Update export-to-postgresql to support callchain export")
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Link: http://lkml.kernel.org/r/1501749090-20357-2-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      c8a82728
    • D
      Merge tag 'wireless-drivers-for-davem-2017-08-15' of... · 0a6f0418
      David S. Miller 提交于
      Merge tag 'wireless-drivers-for-davem-2017-08-15' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers
      
      Kalle Valo says:
      
      ====================
      wireless-drivers fixes for 4.13
      
      This time quite a few fixes for iwlwifi and one major regression fix
      for brcmfmac. For the iwlwifi aggregation bug a small change was
      needed for mac80211, but as Johannes is still away the mac80211 patch
      is taken via wireless-drivers tree.
      
      brcmfmac
      
      * fix firmware crash (a recent regression in bcm4343{0,1,8}
      
      iwlwifi
      
      * Some simple PCI HW ID fix-ups and additions for family 9000
      
      * Remove a bogus warning message with new FWs (bug #196915)
      
      * Don't allow illegal channel options to be used (bug #195299)
      
      * A fix for checksum offload in family 9000
      
      * A fix serious throughput degradation in 11ac with multiple streams
      
      * An old bug in SMPS where the firmware was not aware of SMPS changes
      
      * Fix a memory leak in the SAR code
      
      * Fix a stuck queue case in AP mode;
      
      * Convert a WARN to a simple debug in a legitimate race case (from
        which we can recover)
      
      * Fix a severe throughput aggregation on 9000-family devices due to
        aggregation issues, needed a small change in mac80211
      ====================
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      0a6f0418
  4. 15 8月, 2017 10 次提交
    • A
      perf test shell vfs_getname: Skip for tools built with NO_LIBDWARF=1 · 2b728861
      Arnaldo Carvalho de Melo 提交于
      If that is the case, or if the required lib is not present, e.g.
      elfutils-devel in Fedora systems, then just skip the tests requiring
      DWARF analysis.
      
      Before:
      
        # rpm -e elfutils-devel
        # perf test ping vfs_getname
        60: Use vfs_getname probe to get syscall args filenames   : FAILED!
        61: probe libc's inet_pton & backtrace it with ping       : Ok
        62: Check open filename arg using perf trace + vfs_getname: FAILED!
        63: Add vfs_getname probe to get syscall args filenames   : FAILED!
        #
      
      After:
      
        # perf test vfs_getname
        60: Use vfs_getname probe to get syscall args filenames   : Skip
        62: Check open filename arg using perf trace + vfs_getname: Skip
        63: Add vfs_getname probe to get syscall args filenames   : Skip
        #
      
      Then, reinstalling elfutils-devel, rebuilding the tool and running
      again:
      
        # perf test vfs_getname
        60: Use vfs_getname probe to get syscall args filenames   : Ok
        62: Check open filename arg using perf trace + vfs_getname: Ok
        63: Add vfs_getname probe to get syscall args filenames   : Ok
        #
      Reported-by: NKim Phillips <kim.phillips@arm.com>
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Michael Petlan <mpetlan@redhat.com>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
      Cc: Wang Nan <wangnan0@huawei.com>
      Link: http://lkml.kernel.org/n/tip-d67tvn401fxrwr97pu5ihfb1@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      2b728861
    • A
      perf test shell: Check if 'perf probe' is available, skip tests if not · 1ad5a182
      Arnaldo Carvalho de Melo 提交于
      Add a library function that checks if 'perf probe' is built into the
      tool being tested, skipping tests that need it.
      
      Testing it on a system after removing the library needed to build
      'probe' as a perf subcommand:
      
        # perf test ping vfs_getname
        59: Use vfs_getname probe to get syscall args filenames   : Skip
        60: probe libc's inet_pton & backtrace it with ping       : Skip
        61: Check open filename arg using perf trace + vfs_getname: Skip
        62: Add vfs_getname probe to get syscall args filenames   : Skip
        # perf probe
        perf: 'probe' is not a perf-command. See 'perf --help'.
        #
      
      Now reinstalling elfutils-libelf-devel on this Fedora 26 system to
      rebuild perf and then retest this:
      
        # perf test ping vfs_getname
        60: Use vfs_getname probe to get syscall args filenames   : Ok
        61: probe libc's inet_pton & backtrace it with ping       : Ok
        62: Check open filename arg using perf trace + vfs_getname: Ok
        63: Add vfs_getname probe to get syscall args filenames   : Ok
        #
      Reported-by: NKim Phillips <kim.phillips@arm.com>
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Michael Petlan <mpetlan@redhat.com>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
      Cc: Wang Nan <wangnan0@huawei.com>
      Link: http://lkml.kernel.org/n/tip-ctdck2gzsskqhjzu3ebb62zm@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      1ad5a182
    • A
      perf tests shell: Remove duplicate skip_if_no_debuginfo() function · 06786963
      Arnaldo Carvalho de Melo 提交于
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Wang Nan <wangnan0@huawei.com>
      Link: http://lkml.kernel.org/n/tip-3zxjswdbs2au3ih0rino0iy1@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      06786963
    • E
      tcp: fix possible deadlock in TCP stack vs BPF filter · d624d276
      Eric Dumazet 提交于
      Filtering the ACK packet was not put at the right place.
      
      At this place, we already allocated a child and put it
      into accept queue.
      
      We absolutely need to call tcp_child_process() to release
      its spinlock, or we will deadlock at accept() or close() time.
      
      Found by syzkaller team (Thanks a lot !)
      
      Fixes: 8fac365f ("tcp: Add a tcp_filter hook before handle ack packet")
      Signed-off-by: NEric Dumazet <edumazet@google.com>
      Reported-by: NDmitry Vyukov <dvyukov@google.com>
      Cc: Chenbo Feng <fengc@google.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      d624d276
    • E
      dccp: purge write queue in dccp_destroy_sock() · 7749d4ff
      Eric Dumazet 提交于
      syzkaller reported that DCCP could have a non empty
      write queue at dismantle time.
      
      WARNING: CPU: 1 PID: 2953 at net/core/stream.c:199 sk_stream_kill_queues+0x3ce/0x520 net/core/stream.c:199
      Kernel panic - not syncing: panic_on_warn set ...
      
      CPU: 1 PID: 2953 Comm: syz-executor0 Not tainted 4.13.0-rc4+ #2
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
      Call Trace:
       __dump_stack lib/dump_stack.c:16 [inline]
       dump_stack+0x194/0x257 lib/dump_stack.c:52
       panic+0x1e4/0x417 kernel/panic.c:180
       __warn+0x1c4/0x1d9 kernel/panic.c:541
       report_bug+0x211/0x2d0 lib/bug.c:183
       fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:190
       do_trap_no_signal arch/x86/kernel/traps.c:224 [inline]
       do_trap+0x260/0x390 arch/x86/kernel/traps.c:273
       do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:310
       do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:323
       invalid_op+0x1e/0x30 arch/x86/entry/entry_64.S:846
      RIP: 0010:sk_stream_kill_queues+0x3ce/0x520 net/core/stream.c:199
      RSP: 0018:ffff8801d182f108 EFLAGS: 00010297
      RAX: ffff8801d1144140 RBX: ffff8801d13cb280 RCX: 0000000000000000
      RDX: 0000000000000000 RSI: ffffffff85137b00 RDI: ffff8801d13cb280
      RBP: ffff8801d182f148 R08: 0000000000000001 R09: 0000000000000000
      R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801d13cb4d0
      R13: ffff8801d13cb3b8 R14: ffff8801d13cb300 R15: ffff8801d13cb3b8
       inet_csk_destroy_sock+0x175/0x3f0 net/ipv4/inet_connection_sock.c:835
       dccp_close+0x84d/0xc10 net/dccp/proto.c:1067
       inet_release+0xed/0x1c0 net/ipv4/af_inet.c:425
       sock_release+0x8d/0x1e0 net/socket.c:597
       sock_close+0x16/0x20 net/socket.c:1126
       __fput+0x327/0x7e0 fs/file_table.c:210
       ____fput+0x15/0x20 fs/file_table.c:246
       task_work_run+0x18a/0x260 kernel/task_work.c:116
       exit_task_work include/linux/task_work.h:21 [inline]
       do_exit+0xa32/0x1b10 kernel/exit.c:865
       do_group_exit+0x149/0x400 kernel/exit.c:969
       get_signal+0x7e8/0x17e0 kernel/signal.c:2330
       do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808
       exit_to_usermode_loop+0x21c/0x2d0 arch/x86/entry/common.c:157
       prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
       syscall_return_slowpath+0x3a7/0x450 arch/x86/entry/common.c:263
      Signed-off-by: NEric Dumazet <edumazet@google.com>
      Reported-by: NDmitry Vyukov <dvyukov@google.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      7749d4ff
    • A
      udp: fix linear skb reception with PEEK_OFF · 42b73059
      Al Viro 提交于
      copy_linear_skb() is broken; both of its callers actually
      expect 'len' to be the amount we are trying to copy,
      not the offset of the end.
      Fix it keeping the meanings of arguments in sync with what the
      callers (both of them) expect.
      Also restore a saner behavior on EFAULT (i.e. preserving
      the iov_iter position in case of failure):
      
      The commit fd851ba9 ("udp: harden copy_linear_skb()")
      avoids the more destructive effect of the buggy
      copy_linear_skb(), e.g. no more invalid memory access, but
      said function still behaves incorrectly: when peeking with
      offset it can fail with EINVAL instead of copying the
      appropriate amount of memory.
      Reported-by: NSasha Levin <alexander.levin@verizon.com>
      Fixes: b65ac446 ("udp: try to avoid 2 cache miss on dequeue")
      Fixes: fd851ba9 ("udp: harden copy_linear_skb()")
      Signed-off-by: NAl Viro <viro@ZenIV.linux.org.uk>
      Acked-by: NPaolo Abeni <pabeni@redhat.com>
      Tested-by: NSasha Levin <alexander.levin@verizon.com>
      Acked-by: NEric Dumazet <edumazet@google.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      42b73059
    • W
      ipv6: release rt6->rt6i_idev properly during ifdown · e5645f51
      Wei Wang 提交于
      When a dst is created by addrconf_dst_alloc() for a host route or an
      anycast route, dst->dev points to loopback dev while rt6->rt6i_idev
      points to a real device.
      When the real device goes down, the current cleanup code only checks for
      dst->dev and assumes rt6->rt6i_idev->dev is the same. This causes the
      refcount leak on the real device in the above situation.
      This patch makes sure to always release the refcount taken on
      rt6->rt6i_idev during dst_dev_put().
      
      Fixes: 587fea74 ("ipv6: mark DST_NOGC and remove the operation of
      dst_free()")
      Reported-by: NJohn Stultz <john.stultz@linaro.org>
      Tested-by: NJohn Stultz <john.stultz@linaro.org>
      Tested-by: NMartin KaFai Lau <kafai@fb.com>
      Signed-off-by: NWei Wang <weiwan@google.com>
      Signed-off-by: NMartin KaFai Lau <kafai@fb.com>
      Acked-by: NDavid Ahern <dsahern@gmail.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      e5645f51
    • E
      af_key: do not use GFP_KERNEL in atomic contexts · 36f41f8f
      Eric Dumazet 提交于
      pfkey_broadcast() might be called from non process contexts,
      we can not use GFP_KERNEL in these cases [1].
      
      This patch partially reverts commit ba51b6be ("net: Fix RCU splat in
      af_key"), only keeping the GFP_ATOMIC forcing under rcu_read_lock()
      section.
      
      [1] : syzkaller reported :
      
      in_atomic(): 1, irqs_disabled(): 0, pid: 2932, name: syzkaller183439
      3 locks held by syzkaller183439/2932:
       #0:  (&net->xfrm.xfrm_cfg_mutex){+.+.+.}, at: [<ffffffff83b43888>] pfkey_sendmsg+0x4c8/0x9f0 net/key/af_key.c:3649
       #1:  (&pfk->dump_lock){+.+.+.}, at: [<ffffffff83b467f6>] pfkey_do_dump+0x76/0x3f0 net/key/af_key.c:293
       #2:  (&(&net->xfrm.xfrm_policy_lock)->rlock){+...+.}, at: [<ffffffff83957632>] spin_lock_bh include/linux/spinlock.h:304 [inline]
       #2:  (&(&net->xfrm.xfrm_policy_lock)->rlock){+...+.}, at: [<ffffffff83957632>] xfrm_policy_walk+0x192/0xa30 net/xfrm/xfrm_policy.c:1028
      CPU: 0 PID: 2932 Comm: syzkaller183439 Not tainted 4.13.0-rc4+ #24
      Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
      Call Trace:
       __dump_stack lib/dump_stack.c:16 [inline]
       dump_stack+0x194/0x257 lib/dump_stack.c:52
       ___might_sleep+0x2b2/0x470 kernel/sched/core.c:5994
       __might_sleep+0x95/0x190 kernel/sched/core.c:5947
       slab_pre_alloc_hook mm/slab.h:416 [inline]
       slab_alloc mm/slab.c:3383 [inline]
       kmem_cache_alloc+0x24b/0x6e0 mm/slab.c:3559
       skb_clone+0x1a0/0x400 net/core/skbuff.c:1037
       pfkey_broadcast_one+0x4b2/0x6f0 net/key/af_key.c:207
       pfkey_broadcast+0x4ba/0x770 net/key/af_key.c:281
       dump_sp+0x3d6/0x500 net/key/af_key.c:2685
       xfrm_policy_walk+0x2f1/0xa30 net/xfrm/xfrm_policy.c:1042
       pfkey_dump_sp+0x42/0x50 net/key/af_key.c:2695
       pfkey_do_dump+0xaa/0x3f0 net/key/af_key.c:299
       pfkey_spddump+0x1a0/0x210 net/key/af_key.c:2722
       pfkey_process+0x606/0x710 net/key/af_key.c:2814
       pfkey_sendmsg+0x4d6/0x9f0 net/key/af_key.c:3650
      sock_sendmsg_nosec net/socket.c:633 [inline]
       sock_sendmsg+0xca/0x110 net/socket.c:643
       ___sys_sendmsg+0x755/0x890 net/socket.c:2035
       __sys_sendmsg+0xe5/0x210 net/socket.c:2069
       SYSC_sendmsg net/socket.c:2080 [inline]
       SyS_sendmsg+0x2d/0x50 net/socket.c:2076
       entry_SYSCALL_64_fastpath+0x1f/0xbe
      RIP: 0033:0x445d79
      RSP: 002b:00007f32447c1dc8 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
      RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000445d79
      RDX: 0000000000000000 RSI: 000000002023dfc8 RDI: 0000000000000008
      RBP: 0000000000000086 R08: 00007f32447c2700 R09: 00007f32447c2700
      R10: 00007f32447c2700 R11: 0000000000000202 R12: 0000000000000000
      R13: 00007ffe33edec4f R14: 00007f32447c29c0 R15: 0000000000000000
      
      Fixes: ba51b6be ("net: Fix RCU splat in af_key")
      Signed-off-by: NEric Dumazet <edumazet@google.com>
      Reported-by: NDmitry Vyukov <dvyukov@google.com>
      Cc: David Ahern <dsa@cumulusnetworks.com>
      Acked-by: NDavid Ahern <dsahern@gmail.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      36f41f8f
    • S
      tcp: ulp: avoid module refcnt leak in tcp_set_ulp · 539a06ba
      Sabrina Dubroca 提交于
      __tcp_ulp_find_autoload returns tcp_ulp_ops after taking a reference on
      the module. Then, if ->init fails, tcp_set_ulp propagates the error but
      nothing releases that reference.
      
      Fixes: 734942cc ("tcp: ULP infrastructure")
      Signed-off-by: NSabrina Dubroca <sd@queasysnail.net>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      539a06ba
    • D
      Merge branch 'Add-new-PCI_DEV_FLAGS_NO_RELAXED_ORDERING-flag' · bae514a6
      David S. Miller 提交于
      Ding Tianhong says:
      
      ====================
      Add new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag
      
      Some devices have problems with Transaction Layer Packets with the Relaxed
      Ordering Attribute set.  This patch set adds a new PCIe Device Flag,
      PCI_DEV_FLAGS_NO_RELAXED_ORDERING, a set of PCI Quirks to catch some known
      devices with Relaxed Ordering issues, and a use of this new flag by the
      cxgb4 driver to avoid using Relaxed Ordering with problematic Root Complex
      Ports.
      
      It's been years since I've submitted kernel.org patches, I appolgise for the
      almost certain submission errors.
      
      v2: Alexander point out that the v1 was only a part of the whole solution,
          some platform which has some issues could use the new flag to indicate
          that it is not safe to enable relaxed ordering attribute, then we need
          to clear the relaxed ordering enable bits in the PCI configuration when
          initializing the device. So add a new second patch to modify the PCI
          initialization code to clear the relaxed ordering enable bit in the
          event that the root complex doesn't want relaxed ordering enabled.
      
          The third patch was base on the v1's second patch and only be changed
          to query the relaxed ordering enable bit in the PCI configuration space
          to allow the Chelsio NIC to send TLPs with the relaxed ordering attributes
          set.
      
          This version didn't plan to drop the defines for Intel Drivers to use the
          new checking way to enable relaxed ordering because it is not the hardest
          part of the moment, we could fix it in next patchset when this patches
          reach the goal.
      
      v3: Redesigned the logic for pci_configure_relaxed_ordering when configuration,
          If a PCIe device didn't enable the relaxed ordering attribute default,
          we should not do anything in the PCIe configuration, otherwise we
          should check if any of the devices above us do not support relaxed
          ordering by the PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag, then base on
          the result if we get a return that indicate that the relaxed ordering
          is not supported we should update our device to disable relaxed ordering
          in configuration space. If the device above us doesn't exist or isn't
          the PCIe device, we shouldn't do anything and skip updating relaxed ordering
          because we are probably running in a guest.
      
      v4: Rename the functions pcie_get_relaxed_ordering and pcie_disable_relaxed_ordering
          according John's suggestion, and modify the description, use the true/false
          as the return value.
      
          We shouldn't enable relaxed ordering attribute by the setting in the root
          complex configuration space for PCIe device, so fix it for cxgb4.
      
          Fix some format issues.
      
      v5: Removed the unnecessary code for some function which only return the bool
          value, and add the check for VF device.
      
          Make this patch set base on 4.12-rc5.
      
      v6: Fix the logic error in the need to enable the relaxed ordering attribute for cxgb4.
      
      v7: The cxgb4 drivers will enable the PCIe Capability Device Control[Relaxed
          Ordering Enable] in PCI Probe() routine, this will break our current
          solution for some platform which has problematic when enable the relaxed
          ordering attribute. According to the latest recommendations, remove the
          enable_pcie_relaxed_ordering(), although it could not cover the Peer-to-Peer
          scene, but we agree to leave this problem until we really trigger it.
      
          Make this patch set base on 4.12 release version.
      
      v8: Change the second patch title and description to make it more reasonable,
          add the acked-by from Alex and Ashok.
      
          Add a new patch to enable the Relaxed Ordering Attribute for cxgb4vf driver.
      
          Make this patch set base on 4.13-rc2.
      
      v9: The document (https://software.intel.com/sites/default/files/managed/9e/
          bc/64-ia-32-architectures-optimization-manual.pdf) indicate that the Xeon
          processors based on Broadwell/Haswell microarchitecture has the problem
          with Relaxed Ordering Attribute enabled, so add the whole list Device ID
          from Intel to the patch.
      
      v10: Significant rework based on Bjorn's feedback, reorganize the first 2 patches,
           now the Intel and AMD erratum soc has been divided to the different patches,
           rename the pcie_relaxed_ordering_supported() to pcie_relaxed_ordering_enabled(),
           and no need to check every intervening switch except the root ports, update
           some commits.
      
      v11: We shouldn't let the Intel engineer to acked the AMD's erratum patch, fix the
           funny mistake.
      ====================
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      bae514a6