Pull arm64 fixes from Will Deacon:
 "It's a bit all over the place, as I was hoping to fix a decade-old bug
  in our seccomp handling on syscall entry and ended up collecting other
  fixes in the meantime. You'll see the failed attempt (+revert) here
  but I didn't want to hold off on the others any longer. Hopefully
  we'll get that one squashed next week...

   - Fix early_ioremap() of unaligned ACPI tables

   - Remove bogus information from data abort diagnostics

   - Fix kprobes recursion during single-step

   - Fix incorrect constant in ESR address size fault macro

   - Fix OOB page-table walk in memory hot-unplug notifier

   - Fix OOB access to the linear map when retrieving an unaligned huge pte

   - Fix MPAM register reset values

   - Fix MPAM NULL dereference on teardown"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: make huge_ptep_get handled unaligned addresses
  arm64/mm: Check the requested PFN range during memory removal
  arm64: Correct value returned by ESR_ELx_FSC_ADDRSZ_nL()
  arm64: kprobes: Allow reentering kprobes while single-stepping
  arm64: kprobes: Only handle faults originating from XOL slot
  drivers/virt: pkvm: Fix end calculation in mmio_guard_ioremap_hook()
  Revert "arm64: syscall: Ensure saved x0 is kept in-sync with tracer updates"
  arm64: mm: When logging data aborts only decode Xs when ISV=1
  arm64: fixmap: Allow 256K early_ioremap() at any offset
  arm_mpam: guard MBWU state before adding it to garbage
  arm_mpam: Fix MPAMCFG_MBW_PBM register setting
  arm_mpam: Fix software reset values of MPAMCFG_PRI
  arm64: syscall: Ensure saved x0 is kept in-sync with tracer updates

Pull networking fixes from Jakub Kicinski:
 "Lots of fixes, double the count even for the 'new normal'. Largely due
  to my time off followed by a networking conference which distracted
  most maintainers (less so the AI generators).

  Including fixes from Bluetooth and WiFi.

  Current release - regressions:

   - wifi: mt76: fix MAC address for non OF pcie cards

  Current release - new code bugs:

   - mptcp: fix BUILD_BUG_ON on legacy ARM config

   - wifi: cfg80211: guard optional PMSR nominal time

  Previous releases - regressions:

   - qrtr: ns: raise node count limit to 512, we arbitrarily picked
     256 as a limit, turns out it was too low for real world deployments

   - vhost-net: fix TX stall when vhost owns virtio-net header

   - eth: amd-xgbe: fix MAC_AUTO_SW handling in CL37 AN

   - wifi: ath12k: fix low MLO RX throughput on WCN7850

  Previous releases - always broken:

   - number of random AI fixes for SCTP, RDS and TIPC protocols

   - more AI-looking fixes for WiFi drivers

   - number of fixes for missing pointer reloading after skb pull

   - reject BPF redirect use from qdisc qevent block

   - tcp: initialize standalone TCP-AO response padding

   - vsock/virtio: collapse receive queue under memory pressure to avoid
     client OOMing the host with tiny messages

   - ipv4: icmp: fill flow parameters in icmp_route_lookup decoy lookup,
     make sure the ICMP response routing follows the routing policy

   - gro: fix double aggregation of flush-marked skbs

   - ovpn: fix various refcount bugs

   - tls: device: push pending open record on splice EOF

   - eth: mlx5:
      - use sender devcom for MPV master-up
      - fix MCIA register buffer overflow on 32 dword reads"

* tag 'net-7.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (234 commits)
  drop_monitor: perform u64_stats updates under IRQ-disabled section
  drop_monitor: fix size calculations for 64-bit attributes
  net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD
  mptcp: fix BUILD_BUG_ON on legacy ARM config
  selftests: mptcp: userspace_pm: fix undefined variable port
  mptcp: fix stale skb->sk reference on subflow close
  mptcp: pm: userspace: fix use-after-free in get_local_id
  mptcp: decrement subflows counter on failed passive join
  mac802154: hold an interface reference across the scan worker
  sctp: don't free the ASCONF's own transport in DEL-IP processing
  phonet: check register_netdevice_notifier() error in phonet_device_init()
  phonet: pep: fix use-after-free in pep_get_sb()
  bnge/bng_re: fix ring ID widths
  tipc: fix integer overflow in tipc_recvmsg() and tipc_recvstream()
  net: airoha: fix ETS channel derivation in airoha_tc_setup_qdisc_ets()
  mctp: check register_netdevice_notifier() error in mctp_device_init()
  ptp: netc: explicitly clear TMR_OFF during initialization
  rds: tcp: unregister sysctl before tearing down listen socket
  ipv6: Change allocation flags to match rcu_read_lock section requirements
  net: slip: serialize receive against buffer reallocation
  ...

Export the ptff_function_mask to make ptff_query() usable in modules.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Link: https://patch.msgid.link/20260714130342.1971700-2-svens@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

huge_ptep_get() can be handed a virtual address pointing to the middle
of a contpmd/contpte mapped hugetlb folio (examples of callers are
pagemap_hugetlb_range, page_mapped_in_vma).

The arm64 helper rewalks the pgtables in find_num_contig to answer
whether the huge pte we have maps a contpmd or a contpte hugetlb folio,
and returns CONT_PMDS or CONT_PTES, so that it can collect a/d bits over
the contiguous ptes. We can falsely return CONT_PTES instead of
CONT_PMDS if the addr is not aligned. On systems where CONT_PTES !=
CONT_PMDS (meaning page size is 16K), we could collect excess A/D bit
state, meaning extra work for the kernel. Even worse, we may iterate
beyond the PTE table and dereference a garbage ptep pointer to access
physical memory we don't own. Since the ptep pointer is a linear map
address, we may run off the end of the linear map or into a hole,
dereference a VA not mapped into the kernel pgtables and cause kernel
panic.

Fix this by aligning the pmdp pointer down to a contpmd base before
checking equality with the passed huge pte pointer, to correctly answer
whether the huge pte is the base of a contpmd block.

Fixes: 29cb80519689 ("arm64: hugetlb: Cleanup huge_pte size discovery mechanisms")
Cc: stable@vger.kernel.org
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Signed-off-by: Dev Jain <dev.jain@arm.com>
Acked-by: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Will Deacon <will@kernel.org>

Pull kvm fixes from Paolo Bonzini:
 "RISC-V:

   - Avoid redundant allocations when allocating IMSIC page tables

   - Apply SBI FWFT LOCK flag only on successful set

   - Bound SBI PMU counter mask scan to BITS_PER_LONG, since on RV32 the
     PMU SBI start/stop helper can only access 32 PMU counters.

   - Skip TLB flush when G-stage PTE becomes valid if the Svvptc
     extension is available.

   - Always show Zicbo[m|z|p] block sizes in ONE_REG

   - Inject instruction access fault on unmapped guest fetch

   - Use raw spinlock for irqs_pending and irqs_pending_mask

   - Fix Spectre-v1 in vector register access via ONE_REG

  x86:

   - Fixes to SEV selftests

   - Once free_nested() did a VMCLEAR of shadow VMCS, there's no need to
     VMCLEAR it again if the kernel is preempted and thread migration
     happens

   - Preserve nested TDP shadow page tables if they are used as roots,
     instead of clearing them unnecessarily

   - Fix use of stale data if out-of-memory happens after vendor module
     reload

   - Check for invalid/obsolete root *after* making MMU pages available,
     because the latter can make a page invalid

   - Only reset TSC Deadline Timer in apic_timer_expired on KVM_RUN"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: Only reset TSC Deadline Timer in apic_timer_expired on KVM_RUN
  KVM: selftests: sev_init2_tests: Derive SEV availability from KVM
  KVM: selftests: sev_smoke_test: Only run VM types the host offers
  KVM: x86/mmu: Fix use-after-free on vendor module reload
  KVM: x86/mmu: Preserve nested TDP shadow page tables if they are used as roots
  KVM: x86: Check for invalid/obsolete root *after* making MMU pages available
  KVM: nVMX: Hide shadow VMCS right after VMCLEAR
  KVM: riscv: Fix Spectre-v1 in vector register access
  RISC-V: KVM: Serialize virtual interrupt pending state updates
  RISC-V: KVM: Inject instruction access fault on unmapped guest fetch
  RISC-V: KVM: Zicbo[m|z|p] block sizes should be always present in ONE_REG
  riscv: kvm: Skip TLB flush when G-stage PTE becomes valid with Svvptc
  KVM: riscv: PMU: Bound counter mask scan to BITS_PER_LONG
  KVM: riscv: SBI FWFT: Apply LOCK flag only on successful set
  RISC-V: KVM: Avoid redundant page-table allocations in ioremap topup

prevent_memory_remove_notifier() advances pfn while scanning the requested
range for early memory. When the loop completes, pfn is at or beyond
end_pfn. Passing it to can_unmap_without_split() therefore checks a range
after the one being offlined.

Consequently, a valid request can be rejected based on the following
range, while a request that would split a leaf mapping can be accepted if
the shifted range can be unmapped without a split. This was observed with
CXL DAX memory, where the final memory block was incorrectly allowed to
be offlined.

Pass arg->start_pfn into can_unmap_without_split() so it checks the
requested range.

Fixes: 95a58852b0e5 ("arm64/mm: Reject memory removal that splits a kernel leaf mapping")
Signed-off-by: Richard Cheng <icheng@nvidia.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>

Address size fault, level -1 is encoded as 0b101001 or 0x29 according to
the Arm ARM. Correct the value to match the spec. This also matches the
offset of "level -1 address size fault" in the fault_info array in
fault.c.

Fixes: fb8a3eba9c81 ("KVM: arm64: Only read HPFAR_EL2 when value is architecturally valid")
Signed-off-by: Steven Price <steven.price@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>

KVM/riscv fixes for 7.2, take #1

- Avoid redundant page-table allocations in ioremap pcache topup
- Apply SBI FWFT LOCK flag only on successful set
- Bound SBI PMU counter mask scan to BITS_PER_LONG
- Skip TLB flush when G-stage PTE becomes valid with Svvptc
- Zicbo[m|z|p] block sizes should be always present in ONE_REG
- Inject instruction access fault on unmapped guest fetch
- Serialize virtual interrupt pending state updates using raw spinlock
- Fix Spectre-v1 in vector register access via ONE_REG

On Intel platforms with a VMX preemption timer and APICv, if a VMM
calls KVM_GET_LAPIC before KVM_GET_MSRS to save the vCPU state, it is
possible to lose a pending timer interrupt.

If the thread running these ioctls is migrated to another core after
calling KVM_GET_LAPIC but before KVM_GET_MSRS and the guest is using
their LAPIC timer in TSC-deadline mode, not only does the save LAPIC
state not carry the pending interrupt, the TSCDEADLINE MSR will be
zeroed.

After migration across CPUs, KVM_GET_MSRS calls vcpu_load, posting the
interrupt and clearing the MSR:
vcpu_load() ->
  kvm_arch_vcpu_load() ->
    kvm_lapic_restart_hv_timer() ->
      start_hv_timer() ->
        apic_timer_expired() ->
          kvm_apic_inject_pending_timer_irqs()
            . post interrupt into the LAPIC state
            . clear IA32_TSCDEADLINE

The saved LAPIC state will be missing the pending interrupt and the saved
MSR will be zero. Oops.

Fix by only posting an interrupt when we're attempting to enter the guest
(vcpu->wants_to_run == true), not for vcpu_load from other paths.

Assisted-by: gemini:gemini-3.1-pro-preview
Debugged-by: David Matlack <dmatlack@google.com>
Debugged-by: Sean Christopherson <seanjc@google.com>
Debugged-by: Jim Mattson <jmattson@google.com>
Debugged-by: James Houghton <jthoughton@google.com>
Signed-off-by: Venkatesh Srinivas <venkateshs@chromium.org>
Message-ID: <20260715234234.15382-2-venkateshs@chromium.org>
Reviewed-by: James Houghton <jthoughton@google.com>
Reviewed-by: Chao Gao <chao.gao@intel.com>
Cc: stable@vger.kernel.org
Fixes: ae95f566b3d2 ("KVM: X86: TSCDEADLINE MSR emulation fastpath", 2020-05-15)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

mmu_destroy_caches() destroys pte_list_desc_cache and
mmu_page_header_cache, but leaves both pointers unchanged.  The pointers
live in kvm.ko, and therefore survive when a vendor module is unloaded
while kvm.ko remains loaded.

If creation of pte_list_desc_cache fails during a subsequent vendor
module load, its assignment sets pte_list_desc_cache to NULL and the
error path calls mmu_destroy_caches().  mmu_page_header_cache still
points to the cache destroyed during the preceding vendor module
unload.  Passing that stale pointer to kmem_cache_destroy() causes a
slab use-after-free.

Reproduce the issue on a v7.1.3 kernel with CONFIG_KASAN=y,
CONFIG_KASAN_GENERIC=y, CONFIG_KVM=m, and CONFIG_KVM_INTEL=m.  A
one-shot test hook forces pte_list_desc_cache to NULL on the second
invocation of kvm_mmu_vendor_module_init():

  1. Load kvm.ko and kvm-intel.ko, creating both caches.
  2. Unload only kvm_intel, leaving kvm.ko loaded.
  3. Reload kvm_intel and force initialization through the -ENOMEM path.

KASAN reports:

  BUG: KASAN: slab-use-after-free in
  kvm_mmu_vendor_module_init+0x5b/0x170 [kvm]
  ...
  kmem_cache_destroy+0x21/0x1d0
  kvm_mmu_vendor_module_init+0x5b/0x170 [kvm]
  ...
  Allocated by task 16817:
  __kmem_cache_create_args+0x12c/0x3b0
  __kmem_cache_create.constprop.0+0xb6/0xf0 [kvm]
  kvm_mmu_vendor_module_init+0x13b/0x170 [kvm]
  ...
  Freed by task 16820:
  kmem_cache_destroy+0x117/0x1d0
  kvm_mmu_vendor_module_exit+0x21/0x30 [kvm]

Clear both pointers immediately after destroying their caches so that
the stored state reflects the caches' lifetime and repeated cleanup is
safe.

With the fix applied, the same injected vendor module reload fails with
-ENOMEM as expected and produces no KASAN report.

Fixes: cb498ea2ce1d ("KVM: Portability: Combine kvm_init and kvm_init_x86")
Cc: stable@vger.kernel.org
Signed-off-by: Phil Rosenthal <phil@phil.gs>
Message-ID: <20260718-kvm-mmu-cache-uaf-v3-1-e103b93c74e1@phil.gs>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>