commit d187a86de793f84766ea40b9ade7ac60aabbb4fe upstream.

This function was a masterclass in bad naming, for various historical
reasons.

It claimed to be a non-cached user copy.  It is literally _neither_ of
those things.  It's a specialty memory copy routine that uses
non-temporal stores for the destination (but not the source), and that
does exception handling for both source and destination accesses.

Also note that while it works for unaligned targets, any unaligned parts
(whether at beginning or end) will not use non-temporal stores, since
only words and quadwords can be non-temporal on x86.

The exception handling means that it _can_ be used for user space
accesses, but not on its own - it needs all the normal "start user space
access" logic around it.

But typically the user space access would be the source, not the
non-temporal destination.  That was the original intention of this,
where the destination was some fragile persistent memory target that
needed non-temporal stores in order to catch machine check exceptions
synchronously and deal with them gracefully.

Thus that non-descriptive name: one use case was to copy from user space
into a non-cached kernel buffer.  However, the existing users are a mix
of that intended use-case, and a couple of random drivers that just did
this as a performance tweak.

Some of those random drivers then actively misused the user copying
version (with STAC/CLAC and all) to do kernel copies without ever even
caring about the exception handling, _just_ for the non-temporal
destination.

Rename it as a first small step to actually make it halfway sane, and
change the prototype to be more normal: it doesn't take a user pointer
unless the caller has done the proper conversion, and the argument size
is the full size_t (it still won't actually copy more than 4GB in one
go, but there's also no reason to silently truncate the size argument in
the caller).

Finally, use this now sanely named function in the NTB code, which
mis-used a user copy version (with STAC/CLAC and all) of this interface
despite it not actually being a user copy at all.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 25a642b6abc98bbbabbf2baef9fc498bbea6aee6 upstream.

Drop the explicit KVM_SEV_LAUNCH_UPDATE_VMSA call when creating an SEV-ES
VM in the SEV migration test, as sev_vm_create() automatically updates the
VMSA pages for SEV-ES guests.  The only reason the duplicate call doesn't
cause visible problems is because the test doesn't actually try to run the
vCPUs.  That will change when KVM adds a check to prevent userspace from
re-launching a VMSA (which corrupts the VMSA page due to KVM writing
encrypted private memory).

Fixes: 69f8e15ab61f ("KVM: selftests: Use the SEV library APIs in the intra-host migration test")
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260310234829.2608037-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit f9d7975c52c00b3685cf9a90a81023d17817d991 upstream.

Several HMM tests hardcode TWOMEG as the THP size. This is wrong on
architectures where the PMD size is not 2MB such as arm64 with 64K base
pages where THP is 512MB. Fix this by using read_pmd_pagesize() from
vm_util instead.

While here also replace the custom file_read_ulong() helper used to
parse the default hugetlbfs page size from /proc/meminfo with the
existing default_huge_page_size() from vm_util.

Link: https://lore.kernel.org/20260331063445.3551404-3-apopple@nvidia.com
Link: https://lore.kernel.org/linux-mm/8bd0396a-8997-4d2e-a13f-5aac033083d7@linux.dev/
Fixes: fee9f6d1b8df ("mm/hmm/test: add selftests for HMM")
Fixes: 519071529d2a ("selftests/mm/hmm-tests: new tests for zone device THP migration")
Signed-off-by: Alistair Popple <apopple@nvidia.com>
Reported-by: Zenghui Yu <zenghui.yu@linux.dev>
Closes: https://lore.kernel.org/linux-mm/8bd0396a-8997-4d2e-a13f-5aac033083d7@linux.dev/
Reviewed-by: Balbir Singh <balbirs@nvidia.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Pull RISC-V updates from Paul Walmsley:
 "Before v7.0 is released, fix a few issues with the CFI patchset,
  merged earlier in v7.0-rc, that primarily affect interfaces to
  non-kernel code:

   - Improve the prctl() interface for per-task indirect branch landing
     pad control to expand abbreviations and to resemble the speculation
     control prctl() interface

   - Expand the "LP" and "SS" abbreviations in the ptrace uapi header
     file to "branch landing pad" and "shadow stack", to improve
     readability

   - Fix a typo in a CFI-related macro name in the ptrace uapi header
     file

   - Ensure that the indirect branch tracking state and shadow stack
     state are unlocked immediately after an exec() on the new task so
     that libc subsequently can control it

   - While working in this area, clean up the kernel-internal,
     cross-architecture prctl() function names by expanding the
     abbreviations mentioned above"

* tag 'riscv-for-linus-v7.0-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  prctl: cfi: change the branch landing pad prctl()s to be more descriptive
  riscv: ptrace: cfi: expand "SS" references to "shadow stack" in uapi headers
  prctl: rename branch landing pad implementation functions to be more explicit
  riscv: ptrace: expand "LP" references to "branch landing pads" in uapi headers
  riscv: cfi: clear CFI lock status in start_thread()
  riscv: ptrace: cfi: fix "PRACE" typo in uapi header

Pull turbostat fixes from Len Brown:

 - Fix a memory allocation issue that could corrupt output values or
   SEGV

 - Fix a perf initilization issue that could exit on some HW + kernels

 - Minor fixes

* tag 'turbostat-fixes-for-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
  tools/power turbostat: Allow execution to continue after perf_l2_init() failure
  tools/power turbostat: Fix delimiter bug in print functions
  tools/power turbostat: Fix --show/--hide for individual cpuidle counters
  tools/power turbostat: Fix incorrect format variable
  tools/power turbostat: Consistently use print_float_value()
  tools/power/turbostat: Fix microcode patch level output for AMD/Hygon
  tools/power turbostat: Eliminate unnecessary data structure allocation
  tools/power turbostat: Fix swidle header vs data display
  tools/power turbostat: Fix illegal memory access when SMT is present and disabled

Currently, if perf_l2_init() fails turbostat exits after issuing the
following error (which was encountered on AlderLake):

turbostat: perf_l2_init(cpu0, 0x0, 0xff24) REFS: Invalid argument

This occurs because perf_l2_init() calls err(). However, the code has been
written in such a manner that it is able to perform cleanup and continue.
Therefore, this issue can be addressed by changing the appropriate calls
to err() to warnx().

Additionally, correct the PMU type arguments passed to the warning strings
in the ecore and lcore blocks so the logs accurately reflect the failing
counter type.

Signed-off-by: David Arcari <darcari@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>

Pull networking fixes from Paolo Abeni:
 "Including fixes from netfilter, IPsec and wireless. This is again
  considerably bigger than the old average. No known outstanding
  regressions.

  Current release - regressions:

   - net: increase IP_TUNNEL_RECURSION_LIMIT to 5

   - eth: ice: fix PTP timestamping broken by SyncE code on E825C

  Current release - new code bugs:

   - eth: stmmac: dwmac-motorcomm: fix eFUSE MAC address read failure

  Previous releases - regressions:

   - core: fix cross-cache free of KFENCE-allocated skb head

   - sched: act_csum: validate nested VLAN headers

   - rxrpc: fix call removal to use RCU safe deletion

   - xfrm:
      - wait for RCU readers during policy netns exit
      - fix refcount leak in xfrm_migrate_policy_find

   - wifi: rt2x00usb: fix devres lifetime

   - mptcp: fix slab-use-after-free in __inet_lookup_established

   - ipvs: fix NULL deref in ip_vs_add_service error path

   - eth:
      - airoha: fix memory leak in airoha_qdma_rx_process()
      - lan966x: fix use-after-free and leak in lan966x_fdma_reload()

  Previous releases - always broken:

   - ipv6: ioam: fix potential NULL dereferences in __ioam6_fill_trace_data()

   - ipv4: nexthop: avoid duplicate NHA_HW_STATS_ENABLE on nexthop group
     dump

   - bridge: guard local VLAN-0 FDB helpers against NULL vlan group

   - xsk: tailroom reservation and MTU validation

   - rxrpc:
      - fix to request an ack if window is limited
      - fix RESPONSE authenticator parser OOB read

   - netfilter: nft_ct: fix use-after-free in timeout object destroy

   - batman-adv: hold claim backbone gateways by reference

   - eth:
      - stmmac: fix PTP ref clock for Tegra234
      - idpf: fix PREEMPT_RT raw/bh spinlock nesting for async VC handling
      - ipa: fix GENERIC_CMD register field masks for IPA v5.0+"

* tag 'net-7.0-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (104 commits)
  net: lan966x: fix use-after-free and leak in lan966x_fdma_reload()
  net: lan966x: fix page pool leak in error paths
  net: lan966x: fix page_pool error handling in lan966x_fdma_rx_alloc_page_pool()
  nfc: pn533: allocate rx skb before consuming bytes
  l2tp: Drop large packets with UDP encap
  net: ipa: fix event ring index not programmed for IPA v5.0+
  net: ipa: fix GENERIC_CMD register field masks for IPA v5.0+
  MAINTAINERS: Add Prashanth as additional maintainer for amd-xgbe driver
  devlink: Fix incorrect skb socket family dumping
  af_unix: read UNIX_DIAG_VFS data under unix_state_lock
  Revert "mptcp: add needs_id for netlink appending addr"
  mptcp: fix slab-use-after-free in __inet_lookup_established
  net: txgbe: leave space for null terminators on property_entry
  net: ioam6: fix OOB and missing lock
  rxrpc: proc: size address buffers for %pISpc output
  rxrpc: only handle RESPONSE during service challenge
  rxrpc: Fix buffer overread in rxgk_do_verify_authenticator()
  rxrpc: Fix leak of rxgk context in rxgk_verify_response()
  rxrpc: Fix integer overflow in rxgk_verify_response()
  rxrpc: Fix missing error checks for rxkad encryption/decryption failure
  ...

Introduce a new stress test to check for race conditions in the
nfnetlink_queue subsystem, where an entry is freed while another CPU is
concurrently walking the global rhashtable.

To trigger this, `nf_queue.c` is extended with two new flags:
  * -O (out-of-order): Buffers packet IDs and flushes them in reverse.
  * -b (bogus verdicts): Floods the kernel with non-existent packet IDs.

The bogus verdict loop forces the kernel's lookup function to perform
full rhashtable bucket traversals (-ENOENT). Combined with reverse-order
flushing and heavy parallel UDP/ping flooding across 8 queues, this puts
the nfnetlink_queue code under pressure.

Joint work with Florian Westphal.

Signed-off-by: Fernando Fernandez Mancera <fmancera@suse.de>
Signed-off-by: Florian Westphal <fw@strlen.de>

Add a selftest that verifies the dst_cache in seg6 lwtunnel is not
shared between the input (forwarding) and output (locally generated)
paths.

The test creates three namespaces (ns_src, ns_router, ns_dst)
connected in a line. An SRv6 encap route on ns_router encapsulates
traffic destined to cafe::1 with SID fc00::100. The SID is
reachable only for forwarded traffic (from ns_src) via an ip rule
matching the ingress interface (iif veth-r0 lookup 100), and
blackholed in the main table.

The test verifies that:

  1. A packet generated locally on ns_router does not reach
     ns_dst with an empty cache, since the SID is blackholed;
  2. A forwarded packet from ns_src populates the input cache
     from table 100 and reaches ns_dst;
  3. A packet generated locally on ns_router still does not
     reach ns_dst after the input cache is populated,
     confirming the output path does not reuse the input
     cache entry.

Both the forwarded and local packets are pinned to the same CPU
with taskset, since dst_cache is per-cpu.

Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrea Mayer <andrea.mayer@uniroma2.it>
Reviewed-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Reviewed-by: Justin Iurman <justin.iurman@gmail.com>
Link: https://patch.msgid.link/20260404004405.4057-3-andrea.mayer@uniroma2.it
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The querier-interval test adds h1 (currently a slave of the VRF created
by simple_if_init) to a temporary bridge br1 acting as an outside IGMP
querier. The kernel VRF driver (drivers/net/vrf.c) calls cycle_netdev()
on every slave add and remove, toggling the interface admin-down then up.
Phylink takes the PHY down during the admin-down half of that cycle.
Since h1 and swp1 are cable-connected, swp1 also loses its link may need
several seconds to re-negotiate.

Use setup_wait_dev $h1 0 which waits for h1 to return to UP state, so the
test can rely on the link being back up at this point.

Fixes: 4d8610ee8bd77 ("selftests: net: bridge: add vlan mcast_querier_interval tests")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Link: https://patch.msgid.link/c830f130860fd2efae08bfb9e5b25fd028e58ce5.1775424423.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>