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  1. 22 Oct, 2021 14 commits
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · cd82c4a7
      Linus Torvalds authored 
      Pull more x86 kvm fixes from Paolo Bonzini:

 - Cache coherency fix for SEV live migration

 - Fix for instruction emulation with PKU

 - fixes for rare delaying of interrupt delivery

 - fix for SEV-ES buffer overflow

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: SEV-ES: go over the sev_pio_data buffer in multiple passes if needed
  KVM: SEV-ES: keep INS functions together
  KVM: x86: remove unnecessary arguments from complete_emulator_pio_in
  KVM: x86: split the two parts of emulator_pio_in
  KVM: SEV-ES: clean up kvm_sev_es_ins/outs
  KVM: x86: leave vcpu->arch.pio.count alone in emulator_pio_in_out
  KVM: SEV-ES: rename guest_ins_data to sev_pio_data
  KVM: SEV: Flush cache on non-coherent systems before RECEIVE_UPDATE_DATA
  KVM: MMU: Reset mmu->pkru_mask to avoid stale data
  KVM: nVMX: promptly process interrupts delivered while in guest mode
  KVM: x86: check for interrupts before deciding whether to exit the fast path
      cd82c4a7
    • Paolo Bonzini's avatar
      KVM: SEV-ES: go over the sev_pio_data buffer in multiple passes if needed · 95e16b47
      Paolo Bonzini authored 
      The PIO scratch buffer is larger than a single page, and therefore
it is not possible to copy it in a single step to vcpu->arch/pio_data.
Bound each call to emulator_pio_in/out to a single page; keep
track of how many I/O operations are left in vcpu->arch.sev_pio_count,
so that the operation can be restarted in the complete_userspace_io
callback.

For OUT, this means that the previous kvm_sev_es_outs implementation
becomes an iterator of the loop, and we can consume the sev_pio_data
buffer before leaving to userspace.

For IN, instead, consuming the buffer and decreasing sev_pio_count
is always done in the complete_userspace_io callback, because that
is when the memcpy is done into sev_pio_data.

Cc: stable@vger.kernel.org
Fixes: 7ed9abfe ("KVM: SVM: Support string IO operations for an SEV-ES guest")
Reported-by: default avatarFelix Wilhelm <fwilhelm@google.com>
Reviewed-by: default avatarMaxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      95e16b47
    • Paolo Bonzini's avatar
      KVM: SEV-ES: keep INS functions together · 4fa4b38d
      Paolo Bonzini authored 
      Make the diff a little nicer when we actually get to fixing
the bug.  No functional change intended.

Cc: stable@vger.kernel.org
Fixes: 7ed9abfe ("KVM: SVM: Support string IO operations for an SEV-ES guest")
Reviewed-by: default avatarMaxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      4fa4b38d
    • Paolo Bonzini's avatar
      KVM: x86: remove unnecessary arguments from complete_emulator_pio_in · 6b5efc93
      Paolo Bonzini authored 
      complete_emulator_pio_in can expect that vcpu->arch.pio has been filled in,
and therefore does not need the size and count arguments.  This makes things
nicer when the function is called directly from a complete_userspace_io
callback.

No functional change intended.

Cc: stable@vger.kernel.org
Fixes: 7ed9abfe ("KVM: SVM: Support string IO operations for an SEV-ES guest")
Reviewed-by: default avatarMaxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      6b5efc93
    • Paolo Bonzini's avatar
      KVM: x86: split the two parts of emulator_pio_in · 3b27de27
      Paolo Bonzini authored 
      emulator_pio_in handles both the case where the data is pending in
vcpu->arch.pio.count, and the case where I/O has to be done via either
an in-kernel device or a userspace exit.  For SEV-ES we would like
to split these, to identify clearly the moment at which the
sev_pio_data is consumed.  To this end, create two different
functions: __emulator_pio_in fills in vcpu->arch.pio.count, while
complete_emulator_pio_in clears it and releases vcpu->arch.pio.data.

Because this patch has to be backported, things are left a bit messy.
kernel_pio() operates on vcpu->arch.pio, which leads to emulator_pio_in()
having with two calls to complete_emulator_pio_in().  It will be fixed
in the next release.

While at it, remove the unused void* val argument of emulator_pio_in_out.
The function currently hardcodes vcpu->arch.pio_data as the
source/destination buffer, which sucks but will be fixed after the more
severe SEV-ES buffer overflow.

No functional change intended.

Cc: stable@vger.kernel.org
Fixes: 7ed9abfe ("KVM: SVM: Support string IO operations for an SEV-ES guest")
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      3b27de27
    • Paolo Bonzini's avatar
      KVM: SEV-ES: clean up kvm_sev_es_ins/outs · ea724ea4
      Paolo Bonzini authored 
      A few very small cleanups to the functions, smushed together because
the patch is already very small like this:

- inline emulator_pio_in_emulated and emulator_pio_out_emulated,
  since we already have the vCPU

- remove the data argument and pull setting vcpu->arch.sev_pio_data into
  the caller

- remove unnecessary clearing of vcpu->arch.pio.count when
  emulation is done by the kernel (and therefore vcpu->arch.pio.count
  is already clear on exit from emulator_pio_in and emulator_pio_out).

No functional change intended.

Cc: stable@vger.kernel.org
Fixes: 7ed9abfe ("KVM: SVM: Support string IO operations for an SEV-ES guest")
Reviewed-by: default avatarMaxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      ea724ea4
    • Paolo Bonzini's avatar
      KVM: x86: leave vcpu->arch.pio.count alone in emulator_pio_in_out · 0d33b1ba
      Paolo Bonzini authored 
      Currently emulator_pio_in clears vcpu->arch.pio.count twice if
emulator_pio_in_out performs kernel PIO.  Move the clear into
emulator_pio_out where it is actually necessary.

No functional change intended.

Cc: stable@vger.kernel.org
Fixes: 7ed9abfe ("KVM: SVM: Support string IO operations for an SEV-ES guest")
Reviewed-by: default avatarMaxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      0d33b1ba
    • Paolo Bonzini's avatar
      KVM: SEV-ES: rename guest_ins_data to sev_pio_data · b5998402
      Paolo Bonzini authored 
      We will be using this field for OUTS emulation as well, in case the
data that is pushed via OUTS spans more than one page.  In that case,
there will be a need to save the data pointer across exits to userspace.

So, change the name to something that refers to any kind of PIO.
Also spell out what it is used for, namely SEV-ES.

No functional change intended.

Cc: stable@vger.kernel.org
Fixes: 7ed9abfe ("KVM: SVM: Support string IO operations for an SEV-ES guest")
Reviewed-by: default avatarMaxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      b5998402
    • Linus Torvalds's avatar
      Merge tag 'drm-fixes-2021-10-22' of git://anongit.freedesktop.org/drm/drm · 64222515
      Linus Torvalds authored 
      Pull drm fixes from Dave Airlie:
 "Nothing too crazy at the end of the cycle, the kmb modesetting fixes
  are probably a bit large but it's not a major driver, and its fixing
  monitor doesn't turn on type problems.

  Otherwise it's just a few minor patches, one ast regression revert, an
  msm power stability fix.

  ast:
   - fix regression with connector detect

  msm:
   - fix power stability issue

  msxfb:
   - fix crash on unload

  panel:
   - sync fix

  kmb:
   - modesetting fixes"

* tag 'drm-fixes-2021-10-22' of git://anongit.freedesktop.org/drm/drm:
  Revert "drm/ast: Add detect function support"
  drm/kmb: Enable ADV bridge after modeset
  drm/kmb: Corrected typo in handle_lcd_irq
  drm/kmb: Disable change of plane parameters
  drm/kmb: Remove clearing DPHY regs
  drm/kmb: Limit supported mode to 1080p
  drm/kmb: Work around for higher system clock
  drm/panel: ilitek-ili9881c: Fix sync for Feixin K101-IM2BYL02 panel
  drm: mxsfb: Fix NULL pointer dereference crash on unload
  drm/msm/devfreq: Restrict idle clamping to a618 for now
      64222515
    • Mike Rapoport's avatar
      memblock: exclude MEMBLOCK_NOMAP regions from kmemleak · 658aafc8
      Mike Rapoport authored 
      Vladimir Zapolskiy reports:

Commit a7259df7 ("memblock: make memblock_find_in_range method
private") invokes a kernel panic while running kmemleak on OF platforms
with nomaped regions:

  Unable to handle kernel paging request at virtual address fff000021e00000
  [...]
    scan_block+0x64/0x170
    scan_gray_list+0xe8/0x17c
    kmemleak_scan+0x270/0x514
    kmemleak_write+0x34c/0x4ac

The memory allocated from memblock is registered with kmemleak, but if
it is marked MEMBLOCK_NOMAP it won't have linear map entries so an
attempt to scan such areas will fault.

Ideally, memblock_mark_nomap() would inform kmemleak to ignore
MEMBLOCK_NOMAP memory, but it can be called before kmemleak interfaces
operating on physical addresses can use __va() conversion.

Make sure that functions that mark allocated memory as MEMBLOCK_NOMAP
take care of informing kmemleak to ignore such memory.

Link: https://lore.kernel.org/all/8ade5174-b143-d621-8c8e-dc6a1898c6fb@linaro.org
Link: https://lore.kernel.org/all/c30ff0a2-d196-c50d-22f0-bd50696b1205@quicinc.com
Fixes: a7259df7 ("memblock: make memblock_find_in_range method private")
Reported-by: default avatarVladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Signed-off-by: default avatarMike Rapoport <rppt@linux.ibm.com>
Reviewed-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Tested-by: default avatarVladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Tested-by: default avatarQian Cai <quic_qiancai@quicinc.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      658aafc8
    • Mike Rapoport's avatar
      Revert "memblock: exclude NOMAP regions from kmemleak" · 6c9a5455
      Mike Rapoport authored 
      Commit 6e44bd6d ("memblock: exclude NOMAP regions from kmemleak")
breaks boot on EFI systems with kmemleak and VM_DEBUG enabled:

  efi: Processing EFI memory map:
  efi:   0x000090000000-0x000091ffffff [Conventional|   |  |  |  |  |  |  |  |  |   |WB|WT|WC|UC]
  efi:   0x000092000000-0x0000928fffff [Runtime Data|RUN|  |  |  |  |  |  |  |  |   |WB|WT|WC|UC]
  ------------[ cut here ]------------
  kernel BUG at mm/kmemleak.c:1140!
  Internal error: Oops - BUG: 0 [#1] SMP
  Modules linked in:
  CPU: 0 PID: 0 Comm: swapper Not tainted 5.15.0-rc6-next-20211019+ #104
  pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
  pc : kmemleak_free_part_phys+0x64/0x8c
  lr : kmemleak_free_part_phys+0x38/0x8c
  sp : ffff800011eafbc0
  x29: ffff800011eafbc0 x28: 1fffff7fffb41c0d x27: fffffbfffda0e068
  x26: 0000000092000000 x25: 1ffff000023d5f94 x24: ffff800011ed84d0
  x23: ffff800011ed84c0 x22: ffff800011ed83d8 x21: 0000000000900000
  x20: ffff800011782000 x19: 0000000092000000 x18: ffff800011ee0730
  x17: 0000000000000000 x16: 0000000000000000 x15: 1ffff0000233252c
  x14: ffff800019a905a0 x13: 0000000000000001 x12: ffff7000023d5ed7
  x11: 1ffff000023d5ed6 x10: ffff7000023d5ed6 x9 : dfff800000000000
  x8 : ffff800011eaf6b7 x7 : 0000000000000001 x6 : ffff800011eaf6b0
  x5 : 00008ffffdc2a12a x4 : ffff7000023d5ed7 x3 : 1ffff000023dbf99
  x2 : 1ffff000022f0463 x1 : 0000000000000000 x0 : ffffffffffffffff
  Call trace:
   kmemleak_free_part_phys+0x64/0x8c
   memblock_mark_nomap+0x5c/0x78
   reserve_regions+0x294/0x33c
   efi_init+0x2d0/0x490
   setup_arch+0x80/0x138
   start_kernel+0xa0/0x3ec
   __primary_switched+0xc0/0xc8
  Code: 34000041 97d526e7 f9418e80 36000040 (d4210000)
  random: get_random_bytes called from print_oops_end_marker+0x34/0x80 with crng_init=0
  ---[ end trace 0000000000000000 ]---

The crash happens because kmemleak_free_part_phys() tries to use __va()
before memstart_addr is initialized and this triggers a VM_BUG_ON() in
arch/arm64/include/asm/memory.h:

Revert 6e44bd6d ("memblock: exclude NOMAP regions from kmemleak"),
the issue it is fixing will be fixed differently.
Reported-by: default avatarQian Cai <quic_qiancai@quicinc.com>
Signed-off-by: default avatarMike Rapoport <rppt@linux.ibm.com>
Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      6c9a5455
    • Linus Torvalds's avatar
      Merge branch 'ucount-fixes-for-v5.15' of... · 9d235ac0
      Linus Torvalds authored 
      Merge branch 'ucount-fixes-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

Pull ucounts fixes from Eric Biederman:
 "There has been one very hard to track down bug in the ucount code that
  we have been tracking since roughly v5.14 was released. Alex managed
  to find a reliable reproducer a few days ago and then I was able to
  instrument the code and figure out what the issue was.

  It turns out the sigqueue_alloc single atomic operation optimization
  did not play nicely with ucounts multiple level rlimits. It turned out
  that either sigqueue_alloc or sigqueue_free could be operating on
  multiple levels and trigger the conditions for the optimization on
  more than one level at the same time.

  To deal with that situation I have introduced inc_rlimit_get_ucounts
  and dec_rlimit_put_ucounts that just focuses on the optimization and
  the rlimit and ucount changes.

  While looking into the big bug I found I couple of other little issues
  so I am including those fixes here as well.

  When I have time I would very much like to dig into process ownership
  of the shared signal queue and see if we could pick a single owner for
  the entire queue so that all of the rlimits can count to that owner.
  That should entirely remove the need to call get_ucounts and
  put_ucounts in sigqueue_alloc and sigqueue_free. It is difficult
  because Linux unlike POSIX supports setuid that works on a single
  thread"

* 'ucount-fixes-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  ucounts: Move get_ucounts from cred_alloc_blank to key_change_session_keyring
  ucounts: Proper error handling in set_cred_ucounts
  ucounts: Pair inc_rlimit_ucounts with dec_rlimit_ucoutns in commit_creds
  ucounts: Fix signal ucount refcounting
      9d235ac0
    • Linus Torvalds's avatar
      Merge tag 'net-5.15-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net · 6c2c7127
      Linus Torvalds authored 
      Pull networking fixes from Jakub Kicinski:
 "Including fixes from netfilter, and can.

  We'll have one more fix for a socket accounting regression, it's still
  getting polished. Otherwise things look fine.

  Current release - regressions:

   - revert "vrf: reset skb conntrack connection on VRF rcv", there are
     valid uses for previous behavior

   - can: m_can: fix iomap_read_fifo() and iomap_write_fifo()

  Current release - new code bugs:

   - mlx5: e-switch, return correct error code on group creation failure

  Previous releases - regressions:

   - sctp: fix transport encap_port update in sctp_vtag_verify

   - stmmac: fix E2E delay mechanism (in PTP timestamping)

  Previous releases - always broken:

   - netfilter: ip6t_rt: fix out-of-bounds read of ipv6_rt_hdr

   - netfilter: xt_IDLETIMER: fix out-of-bound read caused by lack of
     init

   - netfilter: ipvs: make global sysctl read-only in non-init netns

   - tcp: md5: fix selection between vrf and non-vrf keys

   - ipv6: count rx stats on the orig netdev when forwarding

   - bridge: mcast: use multicast_membership_interval for IGMPv3

   - can:
      - j1939: fix UAF for rx_kref of j1939_priv abort sessions on
        receiving bad messages

      - isotp: fix TX buffer concurrent access in isotp_sendmsg() fix
        return error on FC timeout on TX path

   - ice: fix re-init of RDMA Tx queues and crash if RDMA was not inited

   - hns3: schedule the polling again when allocation fails, prevent
     stalls

   - drivers: add missing of_node_put() when aborting
     for_each_available_child_of_node()

   - ptp: fix possible memory leak and UAF in ptp_clock_register()

   - e1000e: fix packet loss in burst mode on Tiger Lake and later

   - mlx5e: ipsec: fix more checksum offload issues"

* tag 'net-5.15-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (75 commits)
  usbnet: sanity check for maxpacket
  net: enetc: make sure all traffic classes can send large frames
  net: enetc: fix ethtool counter name for PM0_TERR
  ptp: free 'vclock_index' in ptp_clock_release()
  sfc: Don't use netif_info before net_device setup
  sfc: Export fibre-specific supported link modes
  net/mlx5e: IPsec: Fix work queue entry ethernet segment checksum flags
  net/mlx5e: IPsec: Fix a misuse of the software parser's fields
  net/mlx5e: Fix vlan data lost during suspend flow
  net/mlx5: E-switch, Return correct error code on group creation failure
  net/mlx5: Lag, change multipath and bonding to be mutually exclusive
  ice: Add missing E810 device ids
  igc: Update I226_K device ID
  e1000e: Fix packet loss on Tiger Lake and later
  e1000e: Separate TGP board type from SPT
  ptp: Fix possible memory leak in ptp_clock_register()
  net: stmmac: Fix E2E delay mechanism
  nfc: st95hf: Make spi remove() callback return zero
  net: hns3: disable sriov before unload hclge layer
  net: hns3: fix vf reset workqueue cannot exit
  ...
      6c2c7127
    • Linus Torvalds's avatar
      Merge tag 'powerpc-5.15-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · 0a3221b6
      Linus Torvalds authored 
      Pull powerpc fixes from Michael Ellerman:

 - Fix a bug exposed by a previous fix, where running guests with
   certain SMT topologies could crash the host on Power8.

 - Fix atomic sleep warnings when re-onlining CPUs, when PREEMPT is
   enabled.

Thanks to Nathan Lynch, Srikar Dronamraju, and Valentin Schneider.

* tag 'powerpc-5.15-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/smp: do not decrement idle task preempt count in CPU offline
  powerpc/idle: Don't corrupt back chain when going idle
      0a3221b6
  3. 21 Oct, 2021 24 commits
  5. 20 Oct, 2021 2 commits
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