Pull networking fixes from Paolo Abeni:
 "Including fixes from CAN, netfilter and wireless.

  We have an IPv6 routing regression with the relevant fix still a WiP.
  This includes a last-minute revert to avoid more problems.

  Current release - new code bugs:

   - wifi: nl80211: completely disable per-link stats for now

  Previous releases - regressions:

   - dev_ioctl: take ops lock in hwtstamp lower paths

   - netfilter:
       - fix spurious set lookup failures
       - fix lockdep splat due to missing annotation

   - genetlink: fix genl_bind() invoking bind() after -EPERM

   - phy: transfer phy_config_inband() locking responsibility to phylink

   - can: xilinx_can: fix use-after-free of transmitted SKB

   - hsr: fix lock warnings

   - eth:
       - igb: fix NULL pointer dereference in ethtool loopback test
       - i40e: fix Jumbo Frame support after iPXE boot
       - macsec: sync features on RTM_NEWLINK

  Previous releases - always broken:

   - tunnels: reset the GSO metadata before reusing the skb

   - mptcp: make sync_socket_options propagate SOCK_KEEPOPEN

   - can: j1939: implement NETDEV_UNREGISTER notification hanidler

   - wifi: ath12k: fix WMI TLV header misalignment"

* tag 'net-6.17-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (47 commits)
  Revert "net: usb: asix: ax88772: drop phylink use in PM to avoid MDIO runtime PM wakeups"
  hsr: hold rcu and dev lock for hsr_get_port_ndev
  hsr: use hsr_for_each_port_rtnl in hsr_port_get_hsr
  hsr: use rtnl lock when iterating over ports
  wifi: nl80211: completely disable per-link stats for now
  net: usb: asix: ax88772: drop phylink use in PM to avoid MDIO runtime PM wakeups
  net: ethtool: fix wrong type used in struct kernel_ethtool_ts_info
  MAINTAINERS: add Phil as netfilter reviewer
  netfilter: nf_tables: restart set lookup on base_seq change
  netfilter: nf_tables: make nft_set_do_lookup available unconditionally
  netfilter: nf_tables: place base_seq in struct net
  netfilter: nft_set_rbtree: continue traversal if element is inactive
  netfilter: nft_set_pipapo: don't check genbit from packetpath lookups
  netfilter: nft_set_bitmap: fix lockdep splat due to missing annotation
  can: rcar_can: rcar_can_resume(): fix s2ram with PSCI
  can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB
  can: j1939: j1939_local_ecu_get(): undo increment when j1939_local_ecu_get() fails
  can: j1939: j1939_sk_bind(): call j1939_priv_put() immediately when j1939_local_ecu_get() failed
  can: j1939: implement NETDEV_UNREGISTER notification handler
  selftests: can: enable CONFIG_CAN_VCAN as a module
  ...

Pull bpf fixes from Alexei Starovoitov:
 "A number of fixes accumulated due to summer vacations

   - Fix out-of-bounds dynptr write in bpf_crypto_crypt() kfunc which
     was misidentified as a security issue (Daniel Borkmann)

   - Update the list of BPF selftests maintainers (Eduard Zingerman)

   - Fix selftests warnings with icecc compiler (Ilya Leoshkevich)

   - Disable XDP/cpumap direct return optimization (Jesper Dangaard
     Brouer)

   - Fix unexpected get_helper_proto() result in unusual configuration
     BPF_SYSCALL=y and BPF_EVENTS=n (Jiri Olsa)

   - Allow fallback to interpreter when JIT support is limited (KaFai
     Wan)

   - Fix rqspinlock and choose trylock fallback for NMI waiters. Pick
     the simplest fix. More involved fix is targeted bpf-next (Kumar
     Kartikeya Dwivedi)

   - Fix cleanup when tcp_bpf_send_verdict() fails to allocate
     psock->cork (Kuniyuki Iwashima)

   - Disallow bpf_timer in PREEMPT_RT for now. Proper solution is being
     discussed for bpf-next. (Leon Hwang)

   - Fix XSK cq descriptor production (Maciej Fijalkowski)

   - Tell memcg to use allow_spinning=false path in bpf_timer_init() to
     avoid lockup in cgroup_file_notify() (Peilin Ye)

   - Fix bpf_strnstr() to handle suffix match cases (Rong Tao)"

* tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
  selftests/bpf: Skip timer cases when bpf_timer is not supported
  bpf: Reject bpf_timer for PREEMPT_RT
  tcp_bpf: Call sk_msg_free() when tcp_bpf_send_verdict() fails to allocate psock->cork.
  bpf: Tell memcg to use allow_spinning=false path in bpf_timer_init()
  bpf: Allow fall back to interpreter for programs with stack size <= 512
  rqspinlock: Choose trylock fallback for NMI waiters
  xsk: Fix immature cq descriptor production
  bpf: Update the list of BPF selftests maintainers
  selftests/bpf: Add tests for bpf_strnstr
  selftests/bpf: Fix "expression result unused" warnings with icecc
  bpf: Fix bpf_strnstr() to handle suffix match cases better
  selftests/bpf: Extend crypto_sanity selftest with invalid dst buffer
  bpf: Fix out-of-bounds dynptr write in bpf_crypto_crypt
  bpf: Check the helper function is valid in get_helper_proto
  bpf, cpumap: Disable page_pool direct xdp_return need larger scope

Marc Kleine-Budde says:

====================
pull-request: can 2025-09-10

The 1st patch is by Alex Tran and fixes the Documentation of the
struct bcm_msg_head.

Davide Caratti's patch enabled the VCAN driver as a module for the
Linux self tests.

Tetsuo Handa contributes 3 patches that fix various problems in the
CAN j1939 protocol.

Anssi Hannula's patch fixes a potential use-after-free in the
xilinx_can driver.

Geert Uytterhoeven's patch fixes the rcan_can's suspend to RAM on
R-Car Gen3 using PSCI.

* tag 'linux-can-fixes-for-6.17-20250910' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can:
  can: rcar_can: rcar_can_resume(): fix s2ram with PSCI
  can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB
  can: j1939: j1939_local_ecu_get(): undo increment when j1939_local_ecu_get() fails
  can: j1939: j1939_sk_bind(): call j1939_priv_put() immediately when j1939_local_ecu_get() failed
  can: j1939: implement NETDEV_UNREGISTER notification handler
  selftests: can: enable CONFIG_CAN_VCAN as a module
  docs: networking: can: change bcm_msg_head frames member to support flexible array
====================

Link: https://patch.msgid.link/20250910162907.948454-1-mkl@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

When enable CONFIG_PREEMPT_RT, verifier will reject bpf_timer with
returning -EOPNOTSUPP.

Therefore, skip test cases when errno is EOPNOTSUPP.

cd tools/testing/selftests/bpf
./test_progs -t timer
125     free_timer:SKIP
456     timer:SKIP
457/1   timer_crash/array:SKIP
457/2   timer_crash/hash:SKIP
457     timer_crash:SKIP
458     timer_lockup:SKIP
459     timer_mim:SKIP
Summary: 5/0 PASSED, 6 SKIPPED, 0 FAILED

Signed-off-by: Leon Hwang <leon.hwang@linux.dev>
Link: https://lore.kernel.org/r/20250910125740.52172-3-leon.hwang@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

A proper kernel configuration for running kselftest can be obtained with:

 $ yes | make kselftest-merge

Build of 'vcan' driver is currently missing, while the other required knobs
are already there because of net/link_netns.py [1]. Add a config file in
selftests/net/can to store the minimum set of kconfig needed for CAN
selftests.

[1] https://patch.msgid.link/20250219125039.18024-14-shaw.leon@gmail.com

Fixes: 77442ffa83e8 ("selftests: can: Import tst-filter from can-tests")
Reviewed-by: Vincent Mailhol <mailhol@kernel.org>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Link: https://patch.msgid.link/fa4c0ea262ec529f25e5f5aa9269d84764c67321.1757516009.git.dcaratti@redhat.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This v0.11.0 version introduces SC2329:

  Warn when (non-escaping) functions are never invoked.

Except that, similar to SC2317, ShellCheck is currently unable to figure
out functions that are invoked via trap, or indirectly, when calling
functions via variables. It is then needed to disable this new SC2329.

Reviewed-by: Geliang Tang <geliang@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250908-net-mptcp-misc-fixes-6-17-rc5-v1-3-5f2168a66079@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Add tests for bpf_strnstr():

    bpf_strnstr("", "", 0) = 0
    bpf_strnstr("hello world", "hello", 5) = 0
    bpf_strnstr(str, "hello", 4) = -ENOENT
    bpf_strnstr("", "a", 0) = -ENOENT

Signed-off-by: Rong Tao <rongtao@cestc.cn>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/tencent_2ED218F8082565C95D86A804BDDA8DBA200A@qq.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

icecc is a compiler wrapper that distributes compile jobs over a build
farm [1]. It works by sending toolchain binaries and preprocessed
source code to remote machines.

Unfortunately using it with BPF selftests causes build failures due to
a clang bug [2]. The problem is that clang suppresses the
-Wunused-value warning if the unused expression comes from a macro
expansion. Since icecc compiles preprocessed source code, this
information is not available. This leads to -Wunused-value false
positives.

obj_new_no_struct() and obj_new_acq() use the bpf_obj_new() macro and
discard the result. arena_spin_lock_slowpath() uses two macros that
produce values and ignores the results. Add (void) casts to explicitly
indicate that this is intentional and suppress the warning.

An alternative solution is to change the macros to not produce values.
This would work today for the arena_spin_lock_slowpath() issue, but in
the future there may appear users who need them. Another potential
solution is to replace these macros with functions. Unfortunately this
would not work, because these macros work with unknown types and
control flow.

[1] https://github.com/icecc/icecream
[2] https://github.com/llvm/llvm-project/issues/142614

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20250829030017.102615-2-iii@linux.ibm.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

Small cleanup and test extension to probe the bpf_crypto_{encrypt,decrypt}()
kfunc when a bad dst buffer is passed in to assert that an error is returned.

Also, encrypt_sanity() and skb_crypto_setup() were explicit to set the global
status variable to zero before any test, so do the same for decrypt_sanity().
Do not explicitly zero the on-stack err before bpf_crypto_ctx_create() given
the kfunc is expected to do it internally for the success case.

Before kernel fix:

  # ./vmtest.sh -- ./test_progs -t crypto
  [...]
  [    1.531200] bpf_testmod: loading out-of-tree module taints kernel.
  [    1.533388] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
  #87/1    crypto_basic/crypto_release:OK
  #87/2    crypto_basic/crypto_acquire:OK
  #87      crypto_basic:OK
  test_crypto_sanity:PASS:skel open 0 nsec
  test_crypto_sanity:PASS:ip netns add crypto_sanity_ns 0 nsec
  test_crypto_sanity:PASS:ip -net crypto_sanity_ns -6 addr add face::1/128 dev lo nodad 0 nsec
  test_crypto_sanity:PASS:ip -net crypto_sanity_ns link set dev lo up 0 nsec
  test_crypto_sanity:PASS:open_netns 0 nsec
  test_crypto_sanity:PASS:AF_ALG init fail 0 nsec
  test_crypto_sanity:PASS:if_nametoindex lo 0 nsec
  test_crypto_sanity:PASS:skb_crypto_setup fd 0 nsec
  test_crypto_sanity:PASS:skb_crypto_setup 0 nsec
  test_crypto_sanity:PASS:skb_crypto_setup retval 0 nsec
  test_crypto_sanity:PASS:skb_crypto_setup status 0 nsec
  test_crypto_sanity:PASS:create qdisc hook 0 nsec
  test_crypto_sanity:PASS:make_sockaddr 0 nsec
  test_crypto_sanity:PASS:attach encrypt filter 0 nsec
  test_crypto_sanity:PASS:encrypt socket 0 nsec
  test_crypto_sanity:PASS:encrypt send 0 nsec
  test_crypto_sanity:FAIL:encrypt status unexpected error: -5 (errno 95)
  #88      crypto_sanity:FAIL
  Summary: 1/2 PASSED, 0 SKIPPED, 1 FAILED

After kernel fix:

  # ./vmtest.sh -- ./test_progs -t crypto
  [...]
  [    1.540963] bpf_testmod: loading out-of-tree module taints kernel.
  [    1.542404] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
  #87/1    crypto_basic/crypto_release:OK
  #87/2    crypto_basic/crypto_acquire:OK
  #87      crypto_basic:OK
  #88      crypto_sanity:OK
  Summary: 2/2 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://lore.kernel.org/r/20250829143657.318524-2-daniel@iogearbox.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

Add test to check the broadcast ethernet destination field is set
correctly.

This test sends a broadcast ping, captures it using tcpdump and
ensures that all bits of the 6 octet ethernet destination address
are correctly set by examining the output capture file.

Co-developed-by: Brett A C Sheffield <bacs@librecast.net>
Signed-off-by: Brett A C Sheffield <bacs@librecast.net>
Signed-off-by: Oscar Maes <oscmaes92@gmail.com>
Link: https://patch.msgid.link/20250902150240.4272-1-oscmaes92@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>