Commit Graph

753945 Commits

Author SHA1 Message Date
Willem de Bruijn
730c54d594 ipv4: remove warning in ip_recv_error
A precondition check in ip_recv_error triggered on an otherwise benign
race. Remove the warning.

The warning triggers when passing an ipv6 socket to this ipv4 error
handling function. RaceFuzzer was able to trigger it due to a race
in setsockopt IPV6_ADDRFORM.

  ---
  CPU0
    do_ipv6_setsockopt
      sk->sk_socket->ops = &inet_dgram_ops;

  ---
  CPU1
    sk->sk_prot->recvmsg
      udp_recvmsg
        ip_recv_error
          WARN_ON_ONCE(sk->sk_family == AF_INET6);

  ---
  CPU0
    do_ipv6_setsockopt
      sk->sk_family = PF_INET;

This socket option converts a v6 socket that is connected to a v4 peer
to an v4 socket. It updates the socket on the fly, changing fields in
sk as well as other structs. This is inherently non-atomic. It races
with the lockless udp_recvmsg path.

No other code makes an assumption that these fields are updated
atomically. It is benign here, too, as ip_recv_error cares only about
the protocol of the skbs enqueued on the error queue, for which
sk_family is not a precise predictor (thanks to another isue with
IPV6_ADDRFORM).

Link: http://lkml.kernel.org/r/20180518120826.GA19515@dragonet.kaist.ac.kr
Fixes: 7ce875e5ec ("ipv4: warn once on passing AF_INET6 socket to ip_recv_error")
Reported-by: DaeRyong Jeong <threeearcat@gmail.com>
Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-24 22:16:57 -04:00
Or Gerlitz
f8f4bef322 net : sched: cls_api: deal with egdev path only if needed
When dealing with ingress rule on a netdev, if we did fine through the
conventional path, there's no need to continue into the egdev route,
and we can stop right there.

Not doing so may cause a 2nd rule to be added by the cls api layer
with the ingress being the egdev.

For example, under sriov switchdev scheme, a user rule of VFR A --> VFR B
will end up with two HW rules (1) VF A --> VF B and (2) uplink --> VF B

Fixes: 208c0f4b52 ('net: sched: use tc_setup_cb_call to call per-block callbacks')
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-24 22:12:22 -04:00
Jason Wang
1b15ad683a vhost: synchronize IOTLB message with dev cleanup
DaeRyong Jeong reports a race between vhost_dev_cleanup() and
vhost_process_iotlb_msg():

Thread interleaving:
CPU0 (vhost_process_iotlb_msg)			CPU1 (vhost_dev_cleanup)
(In the case of both VHOST_IOTLB_UPDATE and
VHOST_IOTLB_INVALIDATE)

=====						=====
						vhost_umem_clean(dev->iotlb);
if (!dev->iotlb) {
	        ret = -EFAULT;
		        break;
}
						dev->iotlb = NULL;

The reason is we don't synchronize between them, fixing by protecting
vhost_process_iotlb_msg() with dev mutex.

Reported-by: DaeRyong Jeong <threeearcat@gmail.com>
Fixes: 6b1e6cc785 ("vhost: new device IOTLB API")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-24 22:09:51 -04:00
David S. Miller
d681bc027a mlx5-fixes-2018-05-24
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Merge tag 'mlx5-fixes-2018-05-24' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
Mellanox, mlx5 fixes 2018-05-24

This series includes two mlx5 fixes.

1) add FCS data to checksum complete when required, from Eran Ben
Elisha.

2) Fix A race in IPSec sandbox QP commands, from Yossi Kuperman.

Please pull and let me know if there's any problem.

for -stable v4.15
("net/mlx5e: When RXFCS is set, add FCS data into checksum calculation")
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-24 22:01:06 -04:00
Willem de Bruijn
9aad13b087 packet: fix reserve calculation
Commit b84bbaf7a6 ("packet: in packet_snd start writing at link
layer allocation") ensures that packet_snd always starts writing
the link layer header in reserved headroom allocated for this
purpose.

This is needed because packets may be shorter than hard_header_len,
in which case the space up to hard_header_len may be zeroed. But
that necessary padding is not accounted for in skb->len.

The fix, however, is buggy. It calls skb_push, which grows skb->len
when moving skb->data back. But in this case packet length should not
change.

Instead, call skb_reserve, which moves both skb->data and skb->tail
back, without changing length.

Fixes: b84bbaf7a6 ("packet: in packet_snd start writing at link layer allocation")
Reported-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-24 21:55:20 -04:00
Dave Airlie
4bc6f77795 Merge branch 'vmwgfx-fixes-4.17' of git://people.freedesktop.org/~thomash/linux into drm-fixes
Three fixes for vmwgfx. Two are cc'd stable and fix host logging and its
error paths on 32-bit VMs. One is a fix for a hibernate flaw
introduced with the 4.17 merge window.

* 'vmwgfx-fixes-4.17' of git://people.freedesktop.org/~thomash/linux:
  drm/vmwgfx: Schedule an fb dirty update after resume
  drm/vmwgfx: Fix host logging / guestinfo reading error paths
  drm/vmwgfx: Fix 32-bit VMW_PORT_HB_[IN|OUT] macros
2018-05-25 09:47:56 +10:00
Linus Torvalds
b50694381c Merge branch 'stable/for-linus-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb
Pull swiotlb fix from Konrad Rzeszutek Wilk:
 "One single fix in here: under Xen the DMA32 heap (in the hypervisor)
  would end up looking like swiss cheese.

  The reason being that for every coherent DMA allocation we didn't do
  the proper hypercall to tell Xen to return the page back to the DMA32
  heap. End result was (eventually) no DMA32 space if you (for example)
  continously unloaded and loaded modules"

* 'stable/for-linus-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
  xen-swiotlb: fix the check condition for xen_swiotlb_free_coherent
2018-05-24 14:42:43 -07:00
Yossi Kuperman
1dcbc01f73 net/mlx5: IPSec, Fix a race between concurrent sandbox QP commands
Sandbox QP Commands are retired in the order they are sent. Outstanding
commands are stored in a linked-list in the order they appear. Once a
response is received and the callback gets called, we pull the first
element off the pending list, assuming they correspond.

Sending a message and adding it to the pending list is not done atomically,
hence there is an opportunity for a race between concurrent requests.

Bind both send and add under a critical section.

Fixes: bebb23e6cb ("net/mlx5: Accel, Add IPSec acceleration interface")
Signed-off-by: Yossi Kuperman <yossiku@mellanox.com>
Signed-off-by: Adi Nissim <adin@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2018-05-24 14:40:40 -07:00
Eran Ben Elisha
902a545904 net/mlx5e: When RXFCS is set, add FCS data into checksum calculation
When RXFCS feature is enabled, the HW do not strip the FCS data,
however it is not present in the checksum calculated by the HW.

Fix that by manually calculating the FCS checksum and adding it to the SKB
checksum field.

Add helper function to find the FCS data for all SKB forms (linear,
one fragment or more).

Fixes: 102722fc68 ("net/mlx5e: Add support for RXFCS feature flag")
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2018-05-24 14:40:39 -07:00
Linus Torvalds
34b48b8789 Merge candidates for 4.17-rc
- Remove bouncing addresses from the MAINTAINERS file
 - Kernel oops and bad error handling fixes for hfi, i40iw, cxgb4, and hns drivers
 - Various small LOC behavioral/operational bugs in mlx5, hns, qedr and i40iw drivers
 - Two fixes for patches already sent during the merge window
 - A long standing bug related to not decreasing the pinned pages count in the right
   MM was found and fixed
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull rdma fixes from Jason Gunthorpe:
 "This is pretty much just the usual array of smallish driver bugs.

   - remove bouncing addresses from the MAINTAINERS file

   - kernel oops and bad error handling fixes for hfi, i40iw, cxgb4, and
     hns drivers

   - various small LOC behavioral/operational bugs in mlx5, hns, qedr
     and i40iw drivers

   - two fixes for patches already sent during the merge window

   - a long-standing bug related to not decreasing the pinned pages
     count in the right MM was found and fixed"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (28 commits)
  RDMA/hns: Move the location for initializing tmp_len
  RDMA/hns: Bugfix for cq record db for kernel
  IB/uverbs: Fix uverbs_attr_get_obj
  RDMA/qedr: Fix doorbell bar mapping for dpi > 1
  IB/umem: Use the correct mm during ib_umem_release
  iw_cxgb4: Fix an error handling path in 'c4iw_get_dma_mr()'
  RDMA/i40iw: Avoid panic when reading back the IRQ affinity hint
  RDMA/i40iw: Avoid reference leaks when processing the AEQ
  RDMA/i40iw: Avoid panic when objects are being created and destroyed
  RDMA/hns: Fix the bug with NULL pointer
  RDMA/hns: Set NULL for __internal_mr
  RDMA/hns: Enable inner_pa_vld filed of mpt
  RDMA/hns: Set desc_dma_addr for zero when free cmq desc
  RDMA/hns: Fix the bug with rq sge
  RDMA/hns: Not support qp transition from reset to reset for hip06
  RDMA/hns: Add return operation when configured global param fail
  RDMA/hns: Update convert function of endian format
  RDMA/hns: Load the RoCE dirver automatically
  RDMA/hns: Bugfix for rq record db for kernel
  RDMA/hns: Add rq inline flags judgement
  ...
2018-05-24 14:12:05 -07:00
Linus Torvalds
d7b66b4ab0 for-4.17-rc6-tag
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Merge tag 'for-4.17-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fix from David Sterba:
 "A one-liner that prevents leaking an internal error value 1 out of the
  ftruncate syscall.

  This has been observed in practice. The steps to reproduce make a
  common pattern (open/write/fync/ftruncate) but also need the
  application to not check only for negative values and happens only for
  compressed inlined files.

  The conditions are narrow but as this could break userspace I think
  it's better to merge it now and not wait for the merge window"

* tag 'for-4.17-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  Btrfs: fix error handling in btrfs_truncate()
2018-05-24 11:47:43 -07:00
Lukas Wunner
009f8c90f5 ALSA: hda - Fix runtime PM
Before commit 3b5b899ca6 ("ALSA: hda: Make use of core codec functions
to sync power state"), hda_set_power_state() returned the response to
the Get Power State verb, a 32-bit unsigned integer whose expected value
is 0x233 after transitioning a codec to D3, and 0x0 after transitioning
it to D0.

The response value is significant because hda_codec_runtime_suspend()
does not clear the codec's bit in the codec_powered bitmask unless the
AC_PWRST_CLK_STOP_OK bit (0x200) is set in the response value.  That in
turn prevents the HDA controller from runtime suspending because
azx_runtime_idle() checks that the codec_powered bitmask is zero.

Since commit 3b5b899ca6, hda_set_power_state() only returns 0x0 or
0x1, thereby breaking runtime PM for any HDA controller.  That's because
an inline function introduced by the commit returns a bool instead of a
32-bit unsigned int.  The change was likely erroneous and resulted from
copying and pasting snd_hda_check_power_state(), which is immediately
preceding the newly introduced inline function.  Fix it.

Link: https://bugs.freedesktop.org/show_bug.cgi?id=106597
Fixes: 3b5b899ca6 ("ALSA: hda: Make use of core codec functions to sync power state")
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Abhijeet Kumar <abhijeet.kumar@intel.com>
Reported-and-tested-by: Gunnar Krüger <taijian@posteo.de>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-05-24 20:16:47 +02:00
Joonsoo Kim
d883c6cf3b Revert "mm/cma: manage the memory of the CMA area by using the ZONE_MOVABLE"
This reverts the following commits that change CMA design in MM.

 3d2054ad8c ("ARM: CMA: avoid double mapping to the CMA area if CONFIG_HIGHMEM=y")

 1d47a3ec09 ("mm/cma: remove ALLOC_CMA")

 bad8c6c0b1 ("mm/cma: manage the memory of the CMA area by using the ZONE_MOVABLE")

Ville reported a following error on i386.

  Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
  microcode: microcode updated early to revision 0x4, date = 2013-06-28
  Initializing CPU#0
  Initializing HighMem for node 0 (000377fe:00118000)
  Initializing Movable for node 0 (00000001:00118000)
  BUG: Bad page state in process swapper  pfn:377fe
  page:f53effc0 count:0 mapcount:-127 mapping:00000000 index:0x0
  flags: 0x80000000()
  raw: 80000000 00000000 00000000 ffffff80 00000000 00000100 00000200 00000001
  page dumped because: nonzero mapcount
  Modules linked in:
  CPU: 0 PID: 0 Comm: swapper Not tainted 4.17.0-rc5-elk+ #145
  Hardware name: Dell Inc. Latitude E5410/03VXMC, BIOS A15 07/11/2013
  Call Trace:
   dump_stack+0x60/0x96
   bad_page+0x9a/0x100
   free_pages_check_bad+0x3f/0x60
   free_pcppages_bulk+0x29d/0x5b0
   free_unref_page_commit+0x84/0xb0
   free_unref_page+0x3e/0x70
   __free_pages+0x1d/0x20
   free_highmem_page+0x19/0x40
   add_highpages_with_active_regions+0xab/0xeb
   set_highmem_pages_init+0x66/0x73
   mem_init+0x1b/0x1d7
   start_kernel+0x17a/0x363
   i386_start_kernel+0x95/0x99
   startup_32_smp+0x164/0x168

The reason for this error is that the span of MOVABLE_ZONE is extended
to whole node span for future CMA initialization, and, normal memory is
wrongly freed here.  I submitted the fix and it seems to work, but,
another problem happened.

It's so late time to fix the later problem so I decide to reverting the
series.

Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Laura Abbott <labbott@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-05-24 10:07:50 -07:00
Jim Mattson
1eaafe91a0 kvm: x86: IA32_ARCH_CAPABILITIES is always supported
If there is a possibility that a VM may migrate to a Skylake host,
then the hypervisor should report IA32_ARCH_CAPABILITIES.RSBA[bit 2]
as being set (future work, of course). This implies that
CPUID.(EAX=7,ECX=0):EDX.ARCH_CAPABILITIES[bit 29] should be
set. Therefore, kvm should report this CPUID bit as being supported
whether or not the host supports it.  Userspace is still free to clear
the bit if it chooses.

For more information on RSBA, see Intel's white paper, "Retpoline: A
Branch Target Injection Mitigation" (Document Number 337131-001),
currently available at https://bugzilla.kernel.org/show_bug.cgi?id=199511.

Since the IA32_ARCH_CAPABILITIES MSR is emulated in kvm, there is no
dependency on hardware support for this feature.

Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Fixes: 28c1c9fabf ("KVM/VMX: Emulate MSR_IA32_ARCH_CAPABILITIES")
Cc: stable@vger.kernel.org
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2018-05-24 18:38:34 +02:00
Linus Torvalds
577e75e0c9 Merge branch 'for-4.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
 "Nothing too interesting.  Four patches to update the blacklist and
  add a controller ID"

* 'for-4.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  ahci: Add PCI ID for Cannon Lake PCH-LP AHCI
  libata: blacklist Micron 500IT SSD with MU01 firmware
  libata: Apply NOLPM quirk for SAMSUNG PM830 CXM13D1Q.
  libata: Blacklist some Sandisk SSDs for NCQ
2018-05-24 09:36:16 -07:00
Wei Huang
c4d2188206 KVM: x86: Update cpuid properly when CR4.OSXAVE or CR4.PKE is changed
The CPUID bits of OSXSAVE (function=0x1) and OSPKE (func=0x7, leaf=0x0)
allows user apps to detect if OS has set CR4.OSXSAVE or CR4.PKE. KVM is
supposed to update these CPUID bits when CR4 is updated. Current KVM
code doesn't handle some special cases when updates come from emulator.
Here is one example:

  Step 1: guest boots
  Step 2: guest OS enables XSAVE ==> CR4.OSXSAVE=1 and CPUID.OSXSAVE=1
  Step 3: guest hot reboot ==> QEMU reset CR4 to 0, but CPUID.OSXAVE==1
  Step 4: guest os checks CPUID.OSXAVE, detects 1, then executes xgetbv

Step 4 above will cause an #UD and guest crash because guest OS hasn't
turned on OSXAVE yet. This patch solves the problem by comparing the the
old_cr4 with cr4. If the related bits have been changed,
kvm_update_cpuid() needs to be called.

Signed-off-by: Wei Huang <wei@redhat.com>
Reviewed-by: Bandan Das <bsd@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2018-05-24 17:57:18 +02:00
Linus Torvalds
b68ea0ee03 for-linus-20180524
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Merge tag 'for-linus-20180524' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "Two fixes that should go into this release:

   - a loop writeback error clearing fix from Jeff

   - the sr sense fix from myself"

* tag 'for-linus-20180524' of git://git.kernel.dk/linux-block:
  loop: clear wb_err in bd_inode when detaching backing file
  sr: pass down correctly sized SCSI sense buffer
2018-05-24 08:53:20 -07:00
Linus Torvalds
9ca5a2ae42 Power management fix for 4.17-rc7
Fix a regression from the 4.15 cycle that caused the system suspend
 and resume overhead to increase on many systems and triggered more
 serious problems on some of them (Rafael Wysocki).
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Merge tag 'pm-4.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fix from Rafael Wysocki:
 "Fix a regression from the 4.15 cycle that caused the system suspend
  and resume overhead to increase on many systems and triggered more
  serious problems on some of them (Rafael Wysocki)"

* tag 'pm-4.17-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / core: Fix direct_complete handling for devices with no callbacks
2018-05-24 08:49:56 -07:00
Daniel Borkmann
c93552c443 bpf: properly enforce index mask to prevent out-of-bounds speculation
While reviewing the verifier code, I recently noticed that the
following two program variants in relation to tail calls can be
loaded.

Variant 1:

  # bpftool p d x i 15
    0: (15) if r1 == 0x0 goto pc+3
    1: (18) r2 = map[id:5]
    3: (05) goto pc+2
    4: (18) r2 = map[id:6]
    6: (b7) r3 = 7
    7: (35) if r3 >= 0xa0 goto pc+2
    8: (54) (u32) r3 &= (u32) 255
    9: (85) call bpf_tail_call#12
   10: (b7) r0 = 1
   11: (95) exit

  # bpftool m s i 5
    5: prog_array  flags 0x0
        key 4B  value 4B  max_entries 4  memlock 4096B
  # bpftool m s i 6
    6: prog_array  flags 0x0
        key 4B  value 4B  max_entries 160  memlock 4096B

Variant 2:

  # bpftool p d x i 20
    0: (15) if r1 == 0x0 goto pc+3
    1: (18) r2 = map[id:8]
    3: (05) goto pc+2
    4: (18) r2 = map[id:7]
    6: (b7) r3 = 7
    7: (35) if r3 >= 0x4 goto pc+2
    8: (54) (u32) r3 &= (u32) 3
    9: (85) call bpf_tail_call#12
   10: (b7) r0 = 1
   11: (95) exit

  # bpftool m s i 8
    8: prog_array  flags 0x0
        key 4B  value 4B  max_entries 160  memlock 4096B
  # bpftool m s i 7
    7: prog_array  flags 0x0
        key 4B  value 4B  max_entries 4  memlock 4096B

In both cases the index masking inserted by the verifier in order
to control out of bounds speculation from a CPU via b2157399cc
("bpf: prevent out-of-bounds speculation") seems to be incorrect
in what it is enforcing. In the 1st variant, the mask is applied
from the map with the significantly larger number of entries where
we would allow to a certain degree out of bounds speculation for
the smaller map, and in the 2nd variant where the mask is applied
from the map with the smaller number of entries, we get buggy
behavior since we truncate the index of the larger map.

The original intent from commit b2157399cc is to reject such
occasions where two or more different tail call maps are used
in the same tail call helper invocation. However, the check on
the BPF_MAP_PTR_POISON is never hit since we never poisoned the
saved pointer in the first place! We do this explicitly for map
lookups but in case of tail calls we basically used the tail
call map in insn_aux_data that was processed in the most recent
path which the verifier walked. Thus any prior path that stored
a pointer in insn_aux_data at the helper location was always
overridden.

Fix it by moving the map pointer poison logic into a small helper
that covers both BPF helpers with the same logic. After that in
fixup_bpf_calls() the poison check is then hit for tail calls
and the program rejected. Latter only happens in unprivileged
case since this is the *only* occasion where a rewrite needs to
happen, and where such rewrite is specific to the map (max_entries,
index_mask). In the privileged case the rewrite is generic for
the insn->imm / insn->code update so multiple maps from different
paths can be handled just fine since all the remaining logic
happens in the instruction processing itself. This is similar
to the case of map lookups: in case there is a collision of
maps in fixup_bpf_calls() we must skip the inlined rewrite since
this will turn the generic instruction sequence into a non-
generic one. Thus the patch_call_imm will simply update the
insn->imm location where the bpf_map_lookup_elem() will later
take care of the dispatch. Given we need this 'poison' state
as a check, the information of whether a map is an unpriv_array
gets lost, so enforcing it prior to that needs an additional
state. In general this check is needed since there are some
complex and tail call intensive BPF programs out there where
LLVM tends to generate such code occasionally. We therefore
convert the map_ptr rather into map_state to store all this
w/o extra memory overhead, and the bit whether one of the maps
involved in the collision was from an unpriv_array thus needs
to be retained as well there.

Fixes: b2157399cc ("bpf: prevent out-of-bounds speculation")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-05-24 08:15:43 -07:00
David Vrabel
d8f2f498d9 x86/kvm: fix LAPIC timer drift when guest uses periodic mode
Since 4.10, commit 8003c9ae20 (KVM: LAPIC: add APIC Timer
periodic/oneshot mode VMX preemption timer support), guests using
periodic LAPIC timers (such as FreeBSD 8.4) would see their timers
drift significantly over time.

Differences in the underlying clocks and numerical errors means the
periods of the two timers (hv and sw) are not the same. This
difference will accumulate with every expiry resulting in a large
error between the hv and sw timer.

This means the sw timer may be running slow when compared to the hv
timer. When the timer is switched from hv to sw, the now active sw
timer will expire late. The guest VCPU is reentered and it switches to
using the hv timer. This timer catches up, injecting multiple IRQs
into the guest (of which the guest only sees one as it does not get to
run until the hv timer has caught up) and thus the guest's timer rate
is low (and becomes increasing slower over time as the sw timer lags
further and further behind).

I believe a similar problem would occur if the hv timer is the slower
one, but I have not observed this.

Fix this by synchronizing the deadlines for both timers to the same
time source on every tick. This prevents the errors from accumulating.

Fixes: 8003c9ae20
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: David Vrabel <david.vrabel@nutanix.com>
Cc: stable@vger.kernel.org
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2018-05-24 16:48:55 +02:00
Radim Krčmář
b09efdc250 Fixes for PPC KVM:
- Close a hole which could possibly lead to the host timebase getting
   out of sync.
 
 - Three fixes relating to PTEs and TLB entries for radix guests.
 
 - Fix a bug which could lead to an interrupt never getting delivered
   to the guest, if it is pending for a guest vCPU when the vCPU gets
   offlined.
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Merge tag 'kvm-ppc-fixes-4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

Fixes for PPC KVM:

- Close a hole which could possibly lead to the host timebase getting
  out of sync.

- Three fixes relating to PTEs and TLB entries for radix guests.

- Fix a bug which could lead to an interrupt never getting delivered
  to the guest, if it is pending for a guest vCPU when the vCPU gets
  offlined.
2018-05-24 16:48:05 +02:00
Mika Westerberg
4544e403eb ahci: Add PCI ID for Cannon Lake PCH-LP AHCI
This one should be using the default LPM policy for mobile chipsets so
add the PCI ID to the driver list of supported revices.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
2018-05-24 07:03:32 -07:00
Laura Abbott
82034c23fc arm64: Make sure permission updates happen for pmd/pud
Commit 15122ee2c5 ("arm64: Enforce BBM for huge IO/VMAP mappings")
disallowed block mappings for ioremap since that code does not honor
break-before-make. The same APIs are also used for permission updating
though and the extra checks prevent the permission updates from happening,
even though this should be permitted. This results in read-only permissions
not being fully applied. Visibly, this can occasionaly be seen as a failure
on the built in rodata test when the test data ends up in a section or
as an odd RW gap on the page table dump. Fix this by using
pgattr_change_is_safe instead of p*d_present for determining if the
change is permitted.

Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
Reported-by: Peter Robinson <pbrobinson@gmail.com>
Fixes: 15122ee2c5 ("arm64: Enforce BBM for huge IO/VMAP mappings")
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-05-24 11:19:31 +01:00
Omar Sandoval
d50147381a Btrfs: fix error handling in btrfs_truncate()
Jun Wu at Facebook reported that an internal service was seeing a return
value of 1 from ftruncate() on Btrfs in some cases. This is coming from
the NEED_TRUNCATE_BLOCK return value from btrfs_truncate_inode_items().

btrfs_truncate() uses two variables for error handling, ret and err.
When btrfs_truncate_inode_items() returns non-zero, we set err to the
return value. However, NEED_TRUNCATE_BLOCK is not an error. Make sure we
only set err if ret is an error (i.e., negative).

To reproduce the issue: mount a filesystem with -o compress-force=zstd
and the following program will encounter return value of 1 from
ftruncate:

int main(void) {
        char buf[256] = { 0 };
        int ret;
        int fd;

        fd = open("test", O_CREAT | O_WRONLY | O_TRUNC, 0666);
        if (fd == -1) {
                perror("open");
                return EXIT_FAILURE;
        }

        if (write(fd, buf, sizeof(buf)) != sizeof(buf)) {
                perror("write");
                close(fd);
                return EXIT_FAILURE;
        }

        if (fsync(fd) == -1) {
                perror("fsync");
                close(fd);
                return EXIT_FAILURE;
        }

        ret = ftruncate(fd, 128);
        if (ret) {
                printf("ftruncate() returned %d\n", ret);
                close(fd);
                return EXIT_FAILURE;
        }

        close(fd);
        return EXIT_SUCCESS;
}

Fixes: ddfae63cc8 ("btrfs: move btrfs_truncate_block out of trans handle")
CC: stable@vger.kernel.org # 4.15+
Reported-by: Jun Wu <quark@fb.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2018-05-24 11:56:57 +02:00
oulijun
55ba49cbce RDMA/hns: Move the location for initializing tmp_len
When posted work request, it need to compute the length of
all sges of every wr and fill it into the msg_len field of
send wqe. Thus, While posting multiple wr,
tmp_len should be reinitialized to zero.

Fixes: 8b9b8d143b ("RDMA/hns: Fix the endian problem for hns")
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-05-23 15:45:44 -06:00
oulijun
05d6a4ddb6 RDMA/hns: Bugfix for cq record db for kernel
When use cq record db for kernel, it needs to set the hr_cq->db_en
to 1 and configure the dma address of record cq db of qp context.

Fixes: 86188a8810 ("RDMA/hns: Support cq record doorbell for kernel space")
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-05-23 15:45:44 -06:00
Jason Gunthorpe
f4602cbb0a IB/uverbs: Fix uverbs_attr_get_obj
The err pointer comes from uverbs_attr_get, not from the uobject member,
which does not store an ERR_PTR.

Fixes: be934cca9e ("IB/uverbs: Add device memory registration ioctl support")
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
2018-05-23 15:25:53 -06:00
Kalderon, Michal
30bf066cd9 RDMA/qedr: Fix doorbell bar mapping for dpi > 1
Each user_context receives a separate dpi value and thus a different
address on the doorbell bar. The qedr_mmap function needs to validate
the address and map the doorbell bar accordingly.
The current implementation always checked against dpi=0 doorbell range
leading to a wrong mapping for doorbell bar. (It entered an else case
that mapped the address differently). qedr_mmap should only be used
for doorbells, so the else was actually wrong in the first place.
This only has an affect on arm architecture and not an issue on a
x86 based architecture.
This lead to doorbells not occurring on arm based systems and left
applications that use more than one dpi (or several applications
run simultaneously ) to hang.

Fixes: ac1b36e55a ("qedr: Add support for user context verbs")
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-05-23 15:12:14 -06:00
Jack Morgenstein
d546b67cda net/mlx4: Fix irq-unsafe spinlock usage
spin_lock/unlock was used instead of spin_un/lock_irq
in a procedure used in process space, on a spinlock
which can be grabbed in an interrupt.

This caused the stack trace below to be displayed (on kernel
4.17.0-rc1 compiled with Lock Debugging enabled):

[  154.661474] WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
[  154.668909] 4.17.0-rc1-rdma_rc_mlx+ #3 Tainted: G          I
[  154.675856] -----------------------------------------------------
[  154.682706] modprobe/10159 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
[  154.690254] 00000000f3b0e495 (&(&qp_table->lock)->rlock){+.+.}, at: mlx4_qp_remove+0x20/0x50 [mlx4_core]
[  154.700927]
and this task is already holding:
[  154.707461] 0000000094373b5d (&(&cq->lock)->rlock/1){....}, at: destroy_qp_common+0x111/0x560 [mlx4_ib]
[  154.718028] which would create a new lock dependency:
[  154.723705]  (&(&cq->lock)->rlock/1){....} -> (&(&qp_table->lock)->rlock){+.+.}
[  154.731922]
but this new dependency connects a SOFTIRQ-irq-safe lock:
[  154.740798]  (&(&cq->lock)->rlock){..-.}
[  154.740800]
... which became SOFTIRQ-irq-safe at:
[  154.752163]   _raw_spin_lock_irqsave+0x3e/0x50
[  154.757163]   mlx4_ib_poll_cq+0x36/0x900 [mlx4_ib]
[  154.762554]   ipoib_tx_poll+0x4a/0xf0 [ib_ipoib]
...
to a SOFTIRQ-irq-unsafe lock:
[  154.815603]  (&(&qp_table->lock)->rlock){+.+.}
[  154.815604]
... which became SOFTIRQ-irq-unsafe at:
[  154.827718] ...
[  154.827720]   _raw_spin_lock+0x35/0x50
[  154.833912]   mlx4_qp_lookup+0x1e/0x50 [mlx4_core]
[  154.839302]   mlx4_flow_attach+0x3f/0x3d0 [mlx4_core]

Since mlx4_qp_lookup() is called only in process space, we can
simply replace the spin_un/lock calls with spin_un/lock_irq calls.

Fixes: 6dc06c08be ("net/mlx4: Fix the check in attaching steering rules")
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23 15:48:58 -04:00
Florian Fainelli
79fb218d97 net: phy: broadcom: Fix bcm_write_exp()
On newer PHYs, we need to select the expansion register to write with
setting bits [11:8] to 0xf. This was done correctly by bcm7xxx.c prior
to being migrated to generic code under bcm-phy-lib.c which
unfortunately used the older implementation from the BCM54xx days.

Fix this by creating an inline stub: bcm_write_exp_sel() which adds the
correct value (MII_BCM54XX_EXP_SEL_ER) and update both the Cygnus PHY
and BCM7xxx PHY drivers which require setting these bits.

broadcom.c is unchanged because some PHYs even use a different selector
method, so let them specify it directly (e.g: SerDes secondary selector).

Fixes: a1cba5613e ("net: phy: Add Broadcom phy library for common interfaces")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23 15:27:01 -04:00
Florian Fainelli
733a969a7e net: phy: broadcom: Fix auxiliary control register reads
We are currently doing auxiliary control register reads with the shadow
register value 0b111 (0x7) which incidentally is also the selector value
that should be present in bits [2:0]. Fix this by using the appropriate
selector mask which is defined (MII_BCM54XX_AUXCTL_SHDWSEL_MASK).

This does not have a functional impact yet because we always access the
MII_BCM54XX_AUXCTL_SHDWSEL_MISC (0x7) register in the current code.
This might change at some point though.

Fixes: 5b4e290051 ("net: phy: broadcom: add bcm54xx_auxctl_read")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23 15:18:00 -04:00
Roopa Prabhu
2eabd764cb net: ipv4: add missing RTA_TABLE to rtm_ipv4_policy
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23 15:03:28 -04:00
Colin Ian King
4f7f56b6b1 net/mlx4: fix spelling mistake: "Inrerface" -> "Interface" and rephrase message
Trivial fix to spelling mistake in mlx4_dbg debug message and also
change the phrasing of the message so that is is more readable

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23 14:58:10 -04:00
Nathan Fontenot
73f9d36440 ibmvnic: Only do H_EOI for mobility events
When enabling the sub-CRQ IRQ a previous update sent a H_EOI prior
to the enablement to clear any pending interrupts that may be present
across a partition migration. This fixed a firmware bug where a
migration could erroneously indicate that a H_EOI was pending.

The H_EOI should only be sent when enabling during a mobility
event though. Doing so at other time could wrong and can produce
extra driver output when IRQs are enabled when doing TX completion.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23 14:54:11 -04:00
David S. Miller
ab1f1786ba wireless-drivers fixes for 4.17
Hopefully the last fixes for 4.17. ssb is again causing problems so we
 had to revert a commit and fix it better. Also a small fix to bcma and
 some MAINTAINERS file updates.
 
 ssb
 
 * fix regression with all module PCI cards, for example using b43 and
   b44 drivers
 
 * try again fixing a MIPS linker error
 
 bcma
 
 * fix truncated info log messages
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Merge tag 'wireless-drivers-for-davem-2018-05-22' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
wireless-drivers fixes for 4.17

Hopefully the last fixes for 4.17. ssb is again causing problems so we
had to revert a commit and fix it better. Also a small fix to bcma and
some MAINTAINERS file updates.

ssb

* fix regression with all module PCI cards, for example using b43 and
  b44 drivers

* try again fixing a MIPS linker error

bcma

* fix truncated info log messages
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23 14:45:42 -04:00
Jason Wang
2f3ab6221e tuntap: correctly set SOCKWQ_ASYNC_NOSPACE
When link is down, writes to the device might fail with
-EIO. Userspace needs an indication when the status is resolved.  As a
fix, tun_net_open() attempts to wake up writers - but that is only
effective if SOCKWQ_ASYNC_NOSPACE has been set in the past. This is
not the case of vhost_net which only poll for EPOLLOUT after it meets
errors during sendmsg().

This patch fixes this by making sure SOCKWQ_ASYNC_NOSPACE is set when
socket is not writable or device is down to guarantee EPOLLOUT will be
raised in either tun_chr_poll() or tun_sock_write_space() after device
is up.

Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: Eric Dumazet <edumazet@google.com>
Fixes: 1bd4978a88 ("tun: honor IFF_UP in tun_get_user()")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23 14:32:12 -04:00
David S. Miller
a43ad59a90 Merge branch 'virtio_net-mergeable-XDP'
Jason Wang says:

====================
Fix several issues of virtio-net mergeable XDP

Please review the patches that tries to fix several issues of
virtio-net mergeable XDP.

Changes from V1:
- check against 1 before decreasing instead of resetting to 1
- typoe fixes
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23 13:36:19 -04:00
Jason Wang
3d62b2a0db virtio-net: fix leaking page for gso packet during mergeable XDP
We need to drop refcnt to xdp_page if we see a gso packet. Otherwise
it will be leaked. Fixing this by moving the check of gso packet above
the linearizing logic. While at it, remove useless comment as well.

Cc: John Fastabend <john.fastabend@gmail.com>
Fixes: 72979a6c35 ("virtio_net: xdp, add slowpath case for non contiguous buffers")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23 13:36:19 -04:00
Jason Wang
850e088d5b virtio-net: correctly check num_buf during err path
If we successfully linearize the packet, num_buf will be set to zero
which may confuse error handling path which assumes num_buf is at
least 1 and this can lead the code tries to pop the descriptor of next
buffer. Fixing this by checking num_buf against 1 before decreasing.

Fixes: 4941d472bf ("virtio-net: do not reset during XDP set")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23 13:36:19 -04:00
Jason Wang
5d458a13dd virtio-net: correctly transmit XDP buff after linearizing
We should not go for the error path after successfully transmitting a
XDP buffer after linearizing. Since the error path may try to pop and
drop next packet and increase the drop counters. Fixing this by simply
drop the refcnt of original page and go for xmit path.

Fixes: 72979a6c35 ("virtio_net: xdp, add slowpath case for non contiguous buffers")
Cc: John Fastabend <john.fastabend@gmail.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23 13:36:19 -04:00
Jason Wang
6890418bbb virtio-net: correctly redirect linearized packet
After a linearized packet was redirected by XDP, we should not go for
the err path which will try to pop buffers for the next packet and
increase the drop counter. Fixing this by just drop the page refcnt
for the original page.

Fixes: 186b3c998c ("virtio-net: support XDP_REDIRECT")
Reported-by: David Ahern <dsahern@gmail.com>
Tested-by: David Ahern <dsahern@gmail.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23 13:36:19 -04:00
David S. Miller
419fc888e5 A handful of fixes:
* hwsim radio dump wasn't working for the first radio
  * mesh was updating statistics incorrectly
  * a netlink message allocation was possibly too short
  * wiphy name limit was still too long
  * in certain cases regdb query could find a NULL pointer
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Merge tag 'mac80211-for-davem-2018-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
A handful of fixes:
 * hwsim radio dump wasn't working for the first radio
 * mesh was updating statistics incorrectly
 * a netlink message allocation was possibly too short
 * wiphy name limit was still too long
 * in certain cases regdb query could find a NULL pointer
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23 11:50:05 -04:00
Linus Torvalds
bee797529d Single fix correcting the handling for long-running commands; cros_ec_spi
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Merge tag 'mfd-fixes-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

Pull MFD fix from Lee Jones:
 "A single cros_ec_spi fix correcting the handling for long-running
  commands"

* tag 'mfd-fixes-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd:
  mfd: cros_ec: Retry commands when EC is known to be busy
2018-05-23 08:20:49 -07:00
Linus Torvalds
9ce8654323 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha
Pull alpha fixes from Matt Turner:
 "A few small changes for alpha"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha:
  alpha: io: reorder barriers to guarantee writeX() and iowriteX() ordering #2
  alpha: simplify get_arch_dma_ops
  alpha: use dma_direct_ops for jensen
2018-05-23 08:18:33 -07:00
Thomas Hellstrom
6a93cea15e drm/vmwgfx: Schedule an fb dirty update after resume
We have had problems displaying fbdev after a resume and as a
workaround we have had to call vmw_fb_refresh(). This has had
a number of unwanted side-effects. The root of the problem was,
however that the coalesced fbdev dirty region was not empty on
the first dirty_mark() after a resume, so a flush was never
scheduled.

Fix this by force scheduling an fbdev flush after resume, and
remove the workaround.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
2018-05-23 16:52:55 +02:00
Thomas Hellstrom
f37230c0ad drm/vmwgfx: Fix host logging / guestinfo reading error paths
The error paths were leaking opened channels.
Fix by using dedicated error paths.

Cc: <stable@vger.kernel.org>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
2018-05-23 16:15:52 +02:00
Thomas Hellstrom
938ae7259c drm/vmwgfx: Fix 32-bit VMW_PORT_HB_[IN|OUT] macros
Depending on whether the kernel is compiled with frame-pointer or not,
the temporary memory location used for the bp parameter in these macros
is referenced relative to the stack pointer or the frame pointer.
Hence we can never reference that parameter when we've modified either
the stack pointer or the frame pointer, because then the compiler would
generate an incorrect stack reference.

Fix this by pushing the temporary memory parameter on a known location on
the stack before modifying the stack- and frame pointers.

Cc: <stable@vger.kernel.org>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
2018-05-23 16:11:24 +02:00
Anders Roxell
1a2b80ecc7 selftests: net: reuseport_bpf_numa: don't fail if no numa support
The reuseport_bpf_numa test case fails there's no numa support.  The
test shouldn't fail if there's no support it should be skipped.

Fixes: 3c2c3c16aa ("reuseport, bpf: add test case for bpf_get_numa_node_id")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-05-23 12:21:02 +02:00
Dominik Brodowski
8ecc4979b1 x86/speculation: Simplify the CPU bug detection logic
Only CPUs which speculate can speculate. Therefore, it seems prudent
to test for cpu_no_speculation first and only then determine whether
a specific speculating CPU is susceptible to store bypass speculation.
This is underlined by all CPUs currently listed in cpu_no_speculation
were present in cpu_no_spec_store_bypass as well.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: bp@suse.de
Cc: konrad.wilk@oracle.com
Link: https://lkml.kernel.org/r/20180522090539.GA24668@light.dominikbrodowski.net
2018-05-23 10:55:52 +02:00
Konrad Rzeszutek Wilk
0aa48468d0 KVM/VMX: Expose SSBD properly to guests
The X86_FEATURE_SSBD is an synthetic CPU feature - that is
it bit location has no relevance to the real CPUID 0x7.EBX[31]
bit position. For that we need the new CPU feature name.

Fixes: 52817587e7 ("x86/cpufeatures: Disentangle SSBD enumeration")
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm@vger.kernel.org
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: stable@vger.kernel.org
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lkml.kernel.org/r/20180521215449.26423-2-konrad.wilk@oracle.com
2018-05-23 10:55:52 +02:00