Lorenzo Bianconi says:

====================
net: mvneta: add support for page_pool_get_stats

Introduce page_pool stats ethtool APIs in order to avoid driver duplicated
code.

Changes since v4:
- rebase on top of net-next

Changes since v3:
- get rid of wrong for loop in page_pool_ethtool_stats_get()
- add API stubs when page_pool_stats are not compiled in

Changes since v2:
- remove enum list of page_pool stats in page_pool.h
- remove leftover change in mvneta.c for ethtool_stats array allocation

Changes since v1:
- move stats accounting to page_pool code
- move stats string management to page_pool code
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Introduce support for the page_pool stats API into mvneta driver.
Report page_pool stats through ethtool.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Introduce page_pool APIs to report stats through ethtool and reduce
duplicated code in each driver.
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

  Current release - regressions:

   - smc: fix af_ops of child socket pointing to released memory

   - wifi: ath9k: fix usage of driver-private space in tx_info

  Previous releases - regressions:

   - ipv6: fix panic when forwarding a pkt with no in6 dev

   - sctp: use the correct skb for security_sctp_assoc_request

   - smc: fix NULL pointer dereference in smc_pnet_find_ib()

   - sched: fix initialization order when updating chain 0 head

   - phy: don't defer probe forever if PHY IRQ provider is missing

   - dsa: revert "net: dsa: setup master before ports"

   - dsa: felix: fix tagging protocol changes with multiple CPU ports

   - eth: ice:
      - fix use-after-free when freeing @rx_cpu_rmap
      - revert "iavf: fix deadlock occurrence during resetting VF
        interface"

   - eth: lan966x: stop processing the MAC entry is port is wrong

  Previous releases - always broken:

   - sched:
      - flower: fix parsing of ethertype following VLAN header
      - taprio: check if socket flags are valid

   - nfc: add flush_workqueue to prevent uaf

   - veth: ensure eth header is in skb's linear part

   - eth: stmmac: fix altr_tse_pcs function when using a fixed-link

   - eth: macb: restart tx only if queue pointer is lagging

   - eth: macvlan: fix leaking skb in source mode with nodst option"

* tag 'net-5.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (52 commits)
  net: bcmgenet: Revert "Use stronger register read/writes to assure ordering"
  rtnetlink: Fix handling of disabled L3 stats in RTM_GETSTATS replies
  net: dsa: felix: fix tagging protocol changes with multiple CPU ports
  tun: annotate access to queue->trans_start
  nfc: nci: add flush_workqueue to prevent uaf
  net: dsa: realtek: don't parse compatible string for RTL8366S
  net: dsa: realtek: fix Kconfig to assure consistent driver linkage
  net: ftgmac100: access hardware register after clock ready
  Revert "net: dsa: setup master before ports"
  macvlan: Fix leaking skb in source mode with nodst option
  netfilter: nf_tables: nft_parse_register can return a negative value
  net: lan966x: Stop processing the MAC entry is port is wrong.
  net: lan966x: Fix when a port's upper is changed.
  net: lan966x: Fix IGMP snooping when frames have vlan tag
  net: lan966x: Update lan966x_ptp_get_nominal_value
  sctp: Initialize daddr on peeled off socket
  net/smc: Fix af_ops of child socket pointing to released memory
  net/smc: Fix NULL pointer dereference in smc_pnet_find_ib()
  net/smc: use memcpy instead of snprintf to avoid out of bounds read
  net: macb: Restart tx only if queue pointer is lagging
  ...

Pull sound fixes from Takashi Iwai:
 "This became an unexpectedly large pull request due to various
  regression fixes in the previous kernels.

  The majority of fixes are a series of patches to address the
  regression at probe errors in devres'ed drivers, while there are yet
  more fixes for the x86 SG allocations and for USB-audio buffer
  management. In addition, a few HD-audio quirks and other small fixes
  are found"

* tag 'sound-5.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (52 commits)
  ALSA: usb-audio: Limit max buffer and period sizes per time
  ALSA: memalloc: Add fallback SG-buffer allocations for x86
  ALSA: nm256: Don't call card private_free at probe error path
  ALSA: mtpav: Don't call card private_free at probe error path
  ALSA: rme9652: Fix the missing snd_card_free() call at probe error
  ALSA: hdspm: Fix the missing snd_card_free() call at probe error
  ALSA: hdsp: Fix the missing snd_card_free() call at probe error
  ALSA: oxygen: Fix the missing snd_card_free() call at probe error
  ALSA: lx6464es: Fix the missing snd_card_free() call at probe error
  ALSA: cmipci: Fix the missing snd_card_free() call at probe error
  ALSA: aw2: Fix the missing snd_card_free() call at probe error
  ALSA: als300: Fix the missing snd_card_free() call at probe error
  ALSA: lola: Fix the missing snd_card_free() call at probe error
  ALSA: bt87x: Fix the missing snd_card_free() call at probe error
  ALSA: sis7019: Fix the missing error handling
  ALSA: intel_hdmi: Fix the missing snd_card_free() call at probe error
  ALSA: via82xx: Fix the missing snd_card_free() call at probe error
  ALSA: sonicvibes: Fix the missing snd_card_free() call at probe error
  ALSA: rme96: Fix the missing snd_card_free() call at probe error
  ALSA: rme32: Fix the missing snd_card_free() call at probe error
  ...

Pull btrfs fixes from David Sterba:
 "A few more code and warning fixes.

  There's one feature ioctl removal patch slated for 5.18 that did not
  make it to the main pull request. It's just a one-liner and the ioctl
  has a v2 that's in use for a long time, no point to postpone it to
  5.19.

  Late update:

   - remove balance v1 ioctl, superseded by v2 in 2012

  Fixes:

   - add back cgroup attribution for compressed writes

   - add super block write start/end annotations to asynchronous balance

   - fix root reference count on an error handling path

   - in zoned mode, activate zone at the chunk allocation time to avoid
     ENOSPC due to timing issues

   - fix delayed allocation accounting for direct IO

  Warning fixes:

   - simplify assertion condition in zoned check

   - remove an unused variable"

* tag 'for-5.18-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: fix btrfs_submit_compressed_write cgroup attribution
  btrfs: fix root ref counts in error handling in btrfs_get_root_ref
  btrfs: zoned: activate block group only for extent allocation
  btrfs: return allocated block group from do_chunk_alloc()
  btrfs: mark resumed async balance as writing
  btrfs: remove support of balance v1 ioctl
  btrfs: release correct delalloc amount in direct IO write path
  btrfs: remove unused variable in btrfs_{start,write}_dirty_block_groups()
  btrfs: zoned: remove redundant condition in btrfs_run_delalloc_range

Merge tag 'fscache-fixes-20220413' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull fscache fixes from David Howells:
 "Here's a collection of fscache and cachefiles fixes and misc small
  cleanups. The two main fixes are:

   - Add a missing unmark of the inode in-use mark in an error path.

   - Fix a KASAN slab-out-of-bounds error when setting the xattr on a
     cachefiles volume due to the wrong length being given to memcpy().

  In addition, there's the removal of an unused parameter, removal of an
  unused Kconfig option, conditionalising a bit of procfs-related stuff
  and some doc fixes"

* tag 'fscache-fixes-20220413' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  fscache: remove FSCACHE_OLD_API Kconfig option
  fscache: Use wrapper fscache_set_cache_state() directly when relinquishing
  fscache: Move fscache_cookies_seq_ops specific code under CONFIG_PROC_FS
  fscache: Remove the cookie parameter from fscache_clear_page_bits()
  docs: filesystems: caching/backend-api.rst: fix an object withdrawn API
  docs: filesystems: caching/backend-api.rst: correct two relinquish APIs use
  cachefiles: Fix KASAN slab-out-of-bounds in cachefiles_set_volume_xattr
  cachefiles: unmark inode in use in error path

Lech Perczak says:

====================
rndis_host: handle bogus MAC addresses in ZTE RNDIS devices

When porting support of ZTE MF286R to OpenWrt [1], it was discovered,
that its built-in LTE modem fails to adjust its target MAC address,
when a random MAC address is assigned to the interface, due to detection of
"locally-administered address" bit. This leads to dropping of ingress
trafficat the host. The modem uses RNDIS as its primary interface,
with some variants exposing both of them simultaneously.

Then it was discovered, that cdc_ether driver contains a fixup for that
exact issue, also appearing on CDC ECM interfaces.
I discussed how to proceed with that with Bjørn Mork at OpenWrt forum [3],
with the first approach would be to trust the locally-administered MAC
again, and add a quirk for the problematic ZTE devices, as suggested by
Kristian Evensen. before [4], but reusing the fixup from cdc_ether looks
like a safer and more generic solution.

Finally, according to Bjørn's suggestion. limit the scope of bogus MAC
addressdetection to ZTE devices, the same way as it is done in cdc_ether,
as this trait wasn't really observed outside of ZTE devices.
Do that for both flavours of RNDIS devices, with interface classes
02/02/ff and e0/01/03, as both types are reported by different modems.

[1] https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=7ac8da00609f42b8aba74b7efc6b0d055b7cef3e
[2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bfe9b9d2df669a57a95d641ed46eb018e204c6ce
[3] https://forum.openwrt.org/t/problem-with-modem-in-zte-mf286r/120988
[4] https://lore.kernel.org/all/CAKfDRXhDp3heiD75Lat7cr1JmY-kaJ-MS0tt7QXX=s8RFjbpUQ@mail.gmail.com/T/

Cc: Bjørn Mork <bjorn@mork.no>
Cc: Kristian Evensen <kristian.evensen@gmail.com>
Cc: Oliver Neukum <oliver@neukum.org>

v3: Fixed wrong identifier commit description and whitespace in patch 2.

v2: ensure that MAC fixup is applied to all Ethernet frames in RNDIS
batch, by introducing a driver flag, and integrating the fixup inside
rndis_rx_fixup().
====================

Link: https://lore.kernel.org/r/20220413014416.2306843-1-lech.perczak@gmail.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

Reporting of bogus MAC addresses and ignoring configuration of new
destination address wasn't observed outside of a range of ZTE devices,
among which this seems to be the common bug. Align rndis_host driver
with implementation found in cdc_ether, which also limits this workaround
to ZTE devices.
Suggested-by: Bjørn Mork <bjorn@mork.no>
Cc: Kristian Evensen <kristian.evensen@gmail.com>
Cc: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Lech Perczak <lech.perczak@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Certain ZTE modems, namely: MF823. MF831, MF910, built-in modem from
MF286R, expose both CDC-ECM and RNDIS network interfaces.
They have a trait of ignoring the locally-administered MAC address
configured on the interface both in CDC-ECM and RNDIS part,
and this leads to dropping of incoming traffic by the host.
However, the workaround was only present in CDC-ECM, and MF286R
explicitly requires it in RNDIS mode.

Re-use the workaround in rndis_host as well, to fix operation of MF286R
module, some versions of which expose only the RNDIS interface. Do so by
introducing new flag, RNDIS_DRIVER_DATA_DST_MAC_FIXUP, and testing for it
in rndis_rx_fixup. This is required, as RNDIS uses frame batching, and all
of the packets inside the batch need the fixup. This might introduce a
performance penalty, because test is done for every returned Ethernet
frame.

Apply the workaround to both "flavors" of RNDIS interfaces, as older ZTE
modems, like MF823 found in the wild, report the USB_CLASS_COMM class
interfaces, while MF286R reports USB_CLASS_WIRELESS_CONTROLLER.
Suggested-by: Bjørn Mork <bjorn@mork.no>
Cc: Kristian Evensen <kristian.evensen@gmail.com>
Cc: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Lech Perczak <lech.perczak@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Commit bfe9b9d2 ("cdc_ether: Improve ZTE MF823/831/910 handling")
introduces a workaround for certain ZTE modems reporting invalid MAC
addresses over CDC-ECM.
The same issue was present on their RNDIS interface,which was fixed in
commit a5a18bdf ("rndis_host: Set valid random MAC on buggy devices").

However, internal modem of ZTE MF286R router, on its RNDIS interface, also
exhibits a second issue fixed already in CDC-ECM, of the device not
respecting configured random MAC address. In order to share the fixup for
this with rndis_host driver, export the workaround function, which will
be re-used in the following commit in rndis_host.

Cc: Kristian Evensen <kristian.evensen@gmail.com>
Cc: Bjørn Mork <bjorn@mork.no>
Cc: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Lech Perczak <lech.perczak@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

It turns out after digging deeper into this bug, that it was being
triggered by GCC12 failing to call the bcmgenet_enable_dma()
routine. Given that a gcc12 fix has been merged [1] and the genet
driver now works properly when built with gcc12, this commit should
be reverted.

[1]
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105160
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=aabb9a261ef060cf24fd626713f1d7d9df81aa57

Fixes: 8d3ea3d4 ("net: bcmgenet: Use stronger register read/writes to assure ordering")
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20220412210420.1129430-1-jeremy.linton@arm.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

When L3 stats are disabled, rtnl_offload_xstats_get_size_stats() returns
size of 0, which is supposed to be an indication that the corresponding
attribute should not be emitted. However, instead, the current code
reserves a 0-byte attribute.

The reason this does not show up as a citation on a kasan kernel is that
netdev_offload_xstats_get(), which is supposed to fill in the data, never
ends up getting called, because rtnl_offload_xstats_get_stats() notices
that the stats are not actually used and skips the call.

Thus a zero-length IFLA_OFFLOAD_XSTATS_L3_STATS attribute ends up in a
response, confusing the userspace.

Fix by skipping the L3-stats related block in rtnl_offload_xstats_fill().

Fixes: 0e7788fd ("net: rtnetlink: Add UAPI for obtaining L3 offload xstats")
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://lore.kernel.org/r/591b58e7623edc3eb66dd1fcfa8c8f133d090974.1649794741.git.petrm@nvidia.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

When the device tree has 2 CPU ports defined, a single one is active
(has any dp->cpu_dp pointers point to it). Yet the second one is still a
CPU port, and DSA still calls ->change_tag_protocol on it.

On the NXP LS1028A, the CPU ports are ports 4 and 5. Port 4 is the
active CPU port and port 5 is inactive.

After the following commands:

 # Initial setting
 cat /sys/class/net/eno2/dsa/tagging
 ocelot
 echo ocelot-8021q > /sys/class/net/eno2/dsa/tagging
 echo ocelot > /sys/class/net/eno2/dsa/tagging

traffic is now broken, because the driver has moved the NPI port from
port 4 to port 5, unbeknown to DSA.

The problem can be avoided by detecting that the second CPU port is
unused, and not doing anything for it. Further rework will be needed
when proper support for multiple CPU ports is added.

Treat this as a bug and prepare current kernels to work in single-CPU
mode with multiple-CPU DT blobs.

Fixes: adb3dccf ("net: dsa: felix: convert to the new .change_tag_protocol DSA API")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20220412172209.2531865-1-vladimir.oltean@nxp.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

Commit 5337824f ("net: annotate accesses to queue->trans_start")
introduced a new helper, txq_trans_cond_update, to update
queue->trans_start using WRITE_ONCE. One snippet in drivers/net/tun.c
was missed, as it was introduced roughly at the same time.

Fixes: 5337824f ("net: annotate accesses to queue->trans_start")
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Antoine Tenart <atenart@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20220412135852.466386-1-atenart@kernel.orgSigned-off-by: Paolo Abeni <pabeni@redhat.com>

Our detector found a concurrent use-after-free bug when detaching an
NCI device. The main reason for this bug is the unexpected scheduling
between the used delayed mechanism (timer and workqueue).

The race can be demonstrated below:

Thread-1                           Thread-2
                                 | nci_dev_up()
                                 |   nci_open_device()
                                 |     __nci_request(nci_reset_req)
                                 |       nci_send_cmd
                                 |         queue_work(cmd_work)
nci_unregister_device()          |
  nci_close_device()             | ...
    del_timer_sync(cmd_timer)[1] |
...                              | Worker
nci_free_device()                | nci_cmd_work()
  kfree(ndev)[3]                 |   mod_timer(cmd_timer)[2]

In short, the cleanup routine thought that the cmd_timer has already
been detached by [1] but the mod_timer can re-attach the timer [2], even
it is already released [3], resulting in UAF.

This UAF is easy to trigger, crash trace by POC is like below

[   66.703713] ==================================================================
[   66.703974] BUG: KASAN: use-after-free in enqueue_timer+0x448/0x490
[   66.703974] Write of size 8 at addr ffff888009fb7058 by task kworker/u4:1/33
[   66.703974]
[   66.703974] CPU: 1 PID: 33 Comm: kworker/u4:1 Not tainted 5.18.0-rc2 #5
[   66.703974] Workqueue: nfc2_nci_cmd_wq nci_cmd_work
[   66.703974] Call Trace:
[   66.703974]  <TASK>
[   66.703974]  dump_stack_lvl+0x57/0x7d
[   66.703974]  print_report.cold+0x5e/0x5db
[   66.703974]  ? enqueue_timer+0x448/0x490
[   66.703974]  kasan_report+0xbe/0x1c0
[   66.703974]  ? enqueue_timer+0x448/0x490
[   66.703974]  enqueue_timer+0x448/0x490
[   66.703974]  __mod_timer+0x5e6/0xb80
[   66.703974]  ? mark_held_locks+0x9e/0xe0
[   66.703974]  ? try_to_del_timer_sync+0xf0/0xf0
[   66.703974]  ? lockdep_hardirqs_on_prepare+0x17b/0x410
[   66.703974]  ? queue_work_on+0x61/0x80
[   66.703974]  ? lockdep_hardirqs_on+0xbf/0x130
[   66.703974]  process_one_work+0x8bb/0x1510
[   66.703974]  ? lockdep_hardirqs_on_prepare+0x410/0x410
[   66.703974]  ? pwq_dec_nr_in_flight+0x230/0x230
[   66.703974]  ? rwlock_bug.part.0+0x90/0x90
[   66.703974]  ? _raw_spin_lock_irq+0x41/0x50
[   66.703974]  worker_thread+0x575/0x1190
[   66.703974]  ? process_one_work+0x1510/0x1510
[   66.703974]  kthread+0x2a0/0x340
[   66.703974]  ? kthread_complete_and_exit+0x20/0x20
[   66.703974]  ret_from_fork+0x22/0x30
[   66.703974]  </TASK>
[   66.703974]
[   66.703974] Allocated by task 267:
[   66.703974]  kasan_save_stack+0x1e/0x40
[   66.703974]  __kasan_kmalloc+0x81/0xa0
[   66.703974]  nci_allocate_device+0xd3/0x390
[   66.703974]  nfcmrvl_nci_register_dev+0x183/0x2c0
[   66.703974]  nfcmrvl_nci_uart_open+0xf2/0x1dd
[   66.703974]  nci_uart_tty_ioctl+0x2c3/0x4a0
[   66.703974]  tty_ioctl+0x764/0x1310
[   66.703974]  __x64_sys_ioctl+0x122/0x190
[   66.703974]  do_syscall_64+0x3b/0x90
[   66.703974]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[   66.703974]
[   66.703974] Freed by task 406:
[   66.703974]  kasan_save_stack+0x1e/0x40
[   66.703974]  kasan_set_track+0x21/0x30
[   66.703974]  kasan_set_free_info+0x20/0x30
[   66.703974]  __kasan_slab_free+0x108/0x170
[   66.703974]  kfree+0xb0/0x330
[   66.703974]  nfcmrvl_nci_unregister_dev+0x90/0xd0
[   66.703974]  nci_uart_tty_close+0xdf/0x180
[   66.703974]  tty_ldisc_kill+0x73/0x110
[   66.703974]  tty_ldisc_hangup+0x281/0x5b0
[   66.703974]  __tty_hangup.part.0+0x431/0x890
[   66.703974]  tty_release+0x3a8/0xc80
[   66.703974]  __fput+0x1f0/0x8c0
[   66.703974]  task_work_run+0xc9/0x170
[   66.703974]  exit_to_user_mode_prepare+0x194/0x1a0
[   66.703974]  syscall_exit_to_user_mode+0x19/0x50
[   66.703974]  do_syscall_64+0x48/0x90
[   66.703974]  entry_SYSCALL_64_after_hwframe+0x44/0xae

To fix the UAF, this patch adds flush_workqueue() to ensure the
nci_cmd_work is finished before the following del_timer_sync.
This combination will promise the timer is actually detached.

Fixes: 6a2968aa ("NFC: basic NCI protocol implementation")
Signed-off-by: Lin Ma <linma@zju.edu.cn>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

This switch is not even supported, but if someone were to actually put
this compatible string "realtek,rtl8366s" in their device tree, they
would be greeted with a kernel panic because the probe function would
dereference NULL. So let's just remove it.

Link: https://lore.kernel.org/all/CACRpkdYdKZs0WExXc3=0yPNOwP+oOV60HRz7SRoGjZvYHaT=1g@mail.gmail.com/Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

The kernel test robot reported a build failure:

or1k-linux-ld: drivers/net/dsa/realtek/realtek-smi.o:(.rodata+0x16c): undefined reference to `rtl8366rb_variant'

... with the following build configuration:

CONFIG_NET_DSA_REALTEK=y
CONFIG_NET_DSA_REALTEK_SMI=y
CONFIG_NET_DSA_REALTEK_RTL8365MB=y
CONFIG_NET_DSA_REALTEK_RTL8366RB=m

The problem here is that the realtek-smi interface driver gets built-in,
while the rtl8366rb switch subdriver gets built as a module, hence the
symbol rtl8366rb_variant is not reachable when defining the OF device
table in the interface driver.

The Kconfig dependencies don't help in this scenario because they just
say that the subdriver(s) depend on at least one interface driver. In
fact, the subdrivers don't depend on the interface drivers at all, and
can even be built even in their absence. Somewhat strangely, the
interface drivers can also be built in the absence of any subdriver,
BUT, if a subdriver IS enabled, then it must be reachable according to
the linkage of the interface driver: effectively what the IS_REACHABLE()
macro achieves. If it is not reachable, the above kind of linker error
will be observed.

Rather than papering over the above build error by simply using
IS_REACHABLE(), we can do a little better and admit that it is actually
the interface drivers that have a dependency on the subdrivers. So this
patch does exactly that. Specifically, we ensure that:

1. The interface drivers' Kconfig symbols must have a value no greater
   than the value of any subdriver Kconfig symbols.

2. The subdrivers should by default enable both interface drivers, since
   most users probably want at least one of them; those interface
   drivers can be explicitly disabled however.

What this doesn't do is prevent a user from building only a subdriver,
without any interface driver. To that end, add an additional line of
help in the menu to guide users in the right direction.

Link: https://lore.kernel.org/all/202204110757.XIafvVnj-lkp@intel.com/Reported-by: kernel test robot <lkp@intel.com>
Fixes: aac94001 ("net: dsa: realtek: add new mdio interface for drivers")
Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>

Previously it was not possible to determine which code path was responsible
for generating a certain message after a call to the nfp_X messaging
definitions for cases of duplicate strings. We therefore modify nfp_err,
nfp_warn, nfp_info, nfp_dbg and nfp_printk to print the corresponding file
and line number where the nfp_X definition is used.
Signed-off-by: Dylan Muller <dylan.muller@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Kalle Valo says:

====================
wireless fixes for v5.18

First set of fixes for v5.18. Maintainers file updates, two
compilation warning fixes, one revert for ath11k and smaller fixes to
drivers and stack. All the usual stuff.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Menglong Dong says:

====================
net: ip: add skb drop reasons to ip ingress

In the series "net: use kfree_skb_reason() for ip/udp packet receive",
skb drop reasons are added to the basic ingress path of IPv4. And in
the series "net: use kfree_skb_reason() for ip/neighbour", the egress
paths of IPv4 and IPv6 are handled. Related links:

https://lore.kernel.org/netdev/20220205074739.543606-1-imagedong@tencent.com/
https://lore.kernel.org/netdev/20220226041831.2058437-1-imagedong@tencent.com/

Seems we still have a lot work to do with IP layer, including IPv6 basic
ingress path, IPv4/IPv6 forwarding, IPv6 exthdrs, fragment and defrag,
etc.

In this series, skb drop reasons are added to the basic ingress path of
IPv6 protocol and IPv4/IPv6 packet forwarding. Following functions, which
are used for IPv6 packet receiving are handled:

  ip6_pkt_drop()
  ip6_rcv_core()
  ip6_protocol_deliver_rcu()

And following functions that used for IPv6 TLV parse are handled:

  ip6_parse_tlv()
  ipv6_hop_ra()
  ipv6_hop_ioam()
  ipv6_hop_jumbo()
  ipv6_hop_calipso()
  ipv6_dest_hao()

Besides, ip_forward() and ip6_forward(), which are used for IPv4/IPv6
forwarding, are also handled. And following new drop reasons are added:

  /* host unreachable, corresponding to IPSTATS_MIB_INADDRERRORS */
  SKB_DROP_REASON_IP_INADDRERRORS
  /* network unreachable, corresponding to IPSTATS_MIB_INADDRERRORS */
  SKB_DROP_REASON_IP_INNOROUTES
  /* packet size is too big, corresponding to
   * IPSTATS_MIB_INTOOBIGERRORS
   */
  SKB_DROP_REASON_PKT_TOO_BIG

In order to simply the definition and assignment for
'enum skb_drop_reason', some helper functions are introduced in the 1th
patch. I'm not such if this is necessary, but it makes the code simpler.
For example, we can replace the code:

  if (reason == SKB_DROP_REASON_NOT_SPECIFIED)
          reason = SKB_DROP_REASON_IP_INHDR;

with:

  SKB_DR_OR(reason, IP_INHDR);

In the 6th patch, the statistics for skb in ipv6_hop_jum() is removed,
as I think it is redundant. There are two call chains for
ipv6_hop_jumbo(). The first one is:

  ipv6_destopt_rcv() -> ip6_parse_tlv() -> ipv6_hop_jumbo()

On this call chain, the drop statistics will be done in
ipv6_destopt_rcv() with 'IPSTATS_MIB_INHDRERRORS' if ipv6_hop_jumbo()
returns false.

The second call chain is:

  ip6_rcv_core() -> ipv6_parse_hopopts() -> ip6_parse_tlv()

And the drop statistics will also be done in ip6_rcv_core() with
'IPSTATS_MIB_INHDRERRORS' if ipv6_hop_jumbo() returns false.

Therefore, the statistics in ipv6_hop_jumbo() is redundant, which
means the drop is counted twice. The statistics in ipv6_hop_jumbo()
is almost the same as the outside, except the
'IPSTATS_MIB_INTRUNCATEDPKTS', which seems that we have to ignore it.

======================================================================

Here is a basic test for IPv6 forwarding packet drop that monitored by
'dropwatch' tool:

  drop at: ip6_forward+0x81a/0xb70 (0xffffffff86c73f8a)
  origin: software
  input port ifindex: 7
  timestamp: Wed Apr 13 11:51:06 2022 130010176 nsec
  protocol: 0x86dd
  length: 94
  original length: 94
  drop reason: IP_INADDRERRORS

The origin cause of this case is that IPv6 doesn't allow to forward the
packet with LOCAL-LINK saddr, and results the 'IP_INADDRERRORS' drop
reason.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Replace kfree_skb() used in ip6_protocol_deliver_rcu() with
kfree_skb_reason().

No new reasons are added.

Some paths are ignored, as they are not common, such as encapsulation
on non-final protocol.
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Jiang Biao <benbjiang@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Replace kfree_skb() used in ip6_rcv_core() with kfree_skb_reason().
No new drop reasons are added.

Seems now we use 'SKB_DROP_REASON_IP_INHDR' for too many case during
ipv6 header parse or check, just like what 'IPSTATS_MIB_INHDRERRORS'
do. Will it be too general and hard to know what happened?
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Jiang Biao <benbjiang@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Replace kfree_skb() used in TLV encoded option header parsing with
kfree_skb_reason(). Following functions are involved:

ip6_parse_tlv()
ipv6_hop_ra()
ipv6_hop_ioam()
ipv6_hop_jumbo()
ipv6_hop_calipso()
ipv6_dest_hao()

Most skb drops during this process are regarded as 'InHdrErrors',
as 'IPSTATS_MIB_INHDRERRORS' is used when ip6_parse_tlv() fails,
which make we use 'SKB_DROP_REASON_IP_INHDR' correspondingly.

However, 'IP_INHDR' is a relatively general reason. Therefore, we
can use other reasons with higher priority in some cases. For example,
'SKB_DROP_REASON_UNHANDLED_PROTO' is used for unknown TLV options.
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Jiang Biao <benbjiang@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There are two call chains for ipv6_hop_jumbo(). The first one is:

ipv6_destopt_rcv() -> ip6_parse_tlv() -> ipv6_hop_jumbo()

On this call chain, the drop statistics will be done in
ipv6_destopt_rcv() with 'IPSTATS_MIB_INHDRERRORS' if ipv6_hop_jumbo()
returns false.

The second call chain is:

ip6_rcv_core() -> ipv6_parse_hopopts() -> ip6_parse_tlv()

And the drop statistics will also be done in ip6_rcv_core() with
'IPSTATS_MIB_INHDRERRORS' if ipv6_hop_jumbo() returns false.

Therefore, the statistics in ipv6_hop_jumbo() is redundant, which
means the drop is counted twice. The statistics in ipv6_hop_jumbo()
is almost the same as the outside, except the
'IPSTATS_MIB_INTRUNCATEDPKTS', which seems that we have to ignore it.
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Jiang Biao <benbjiang@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In order to add the skb drop reasons support to icmpv6_param_prob(),
introduce the function icmpv6_param_prob_reason() and make
icmpv6_param_prob() an inline call to it. This new function will be
used in the following patches.
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Jiang Biao <benbjiang@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Replace kfree_skb() which is used in ip6_forward() and ip_forward()
with kfree_skb_reason().

The new drop reason 'SKB_DROP_REASON_PKT_TOO_BIG' is introduced for
the case that the length of the packet exceeds MTU and can't
fragment.
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Jiang Biao <benbjiang@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Replace kfree_skb() used in ip6_pkt_drop() with kfree_skb_reason().
No new reason is added.
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Jiang Biao <benbjiang@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Eventually, I find out the handler function for inputting route lookup
fail: ip_error().

The drop reasons we used in ip_error() are almost corresponding to
IPSTATS_MIB_*, and following new reasons are introduced:

SKB_DROP_REASON_IP_INADDRERRORS
SKB_DROP_REASON_IP_INNOROUTES

Isn't the name SKB_DROP_REASON_IP_HOSTUNREACH and
SKB_DROP_REASON_IP_NETUNREACH more accurate? To make them corresponding
to IPSTATS_MIB_*, we keep their name still.
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Jiang Biao <benbjiang@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In order to simply the definition and assignment for
'enum skb_drop_reason', introduce some helpers.

SKB_DR() is used to define a variable of type 'enum skb_drop_reason'
with the 'SKB_DROP_REASON_NOT_SPECIFIED' initial value.

SKB_DR_SET() is used to set the value of the variable. Seems it is
a little useless? But it makes the code shorter.

SKB_DR_OR() is used to set the value of the variable if it is not set
yet, which means its value is SKB_DROP_REASON_NOT_SPECIFIED.
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Jiang Biao <benbjiang@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Veerasenareddy Burru says:

====================
Add octeon_ep driver

This driver implements networking functionality of Marvell's Octeon
PCI Endpoint NIC.

This driver support following devices:
 * Network controller: Cavium, Inc. Device b200

V4 -> V5:
   - Fix warnings reported by clang.
   - Address comments from community reviews.

V3 -> V4:
   - Fix warnings and errors reported by "make W=1 C=1".

V2 -> V3:
   - Fix warnings and errors reported by kernel test robot:
     "Reported-by: kernel test robot <lkp@intel.com>"

V1 -> V2:
    - Address review comments on original patch series.
    - Divide PATCH 1/4 from the original series into 4 patches in
      v2 patch series: PATCH 1/7 to PATCH 4/7.
    - Fix clang build errors.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Add support for the following ethtool commands:

ethtool -i|--driver devname
ethtool devname
ethtool -s devname [speed N] [autoneg on|off] [advertise N]
ethtool -S|--statistics devname
Signed-off-by: Veerasenareddy Burru <vburru@marvell.com>
Signed-off-by: Abhijit Ayarekar <aayarekar@marvell.com>
Signed-off-by: Satananda Burla <sburla@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add support to enable MSI-x and register interrupts.
Add support to process Tx and Rx traffic. Includes processing
Tx completions and Rx refill.
Signed-off-by: Veerasenareddy Burru <vburru@marvell.com>
Signed-off-by: Abhijit Ayarekar <aayarekar@marvell.com>
Signed-off-by: Satananda Burla <sburla@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add support for ndo ops to set MAC address, change MTU, get stats.
Add control path support to set MAC address, change MTU, get stats,
set speed, get and set link mode.
Signed-off-by: Veerasenareddy Burru <vburru@marvell.com>
Signed-off-by: Abhijit Ayarekar <aayarekar@marvell.com>
Signed-off-by: Satananda Burla <sburla@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Implement Tx/Rx ring resource allocation and cleanup.
Signed-off-by: Veerasenareddy Burru <vburru@marvell.com>
Signed-off-by: Abhijit Ayarekar <aayarekar@marvell.com>
Signed-off-by: Satananda Burla <sburla@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add mailbox between host and NIC to send control commands from host to
NIC and receive responses and notifications from NIC to host driver,
like link status update.
Signed-off-by: Veerasenareddy Burru <vburru@marvell.com>
Signed-off-by: Abhijit Ayarekar <aayarekar@marvell.com>
Signed-off-by: Satananda Burla <sburla@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Implement hardware resource init and shutdown helper APIs.
This includes hardware Tx/Rx queue init/enable/disable/reset,
non queue interrupt handler that decodes non-queue interrupt type.
Signed-off-by: Veerasenareddy Burru <vburru@marvell.com>
Signed-off-by: Abhijit Ayarekar <aayarekar@marvell.com>
Signed-off-by: Satananda Burla <sburla@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add driver framework and device setup and initialization for Octeon
PCI Endpoint NIC.

Add implementation to load module, initilaize, register network device,
cleanup and unload module.
Signed-off-by: Veerasenareddy Burru <vburru@marvell.com>
Signed-off-by: Abhijit Ayarekar <aayarekar@marvell.com>
Signed-off-by: Satananda Burla <sburla@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Nikolay Aleksandrov says:

====================
net: bridge: add flush filtering support

This patch-set adds support to specify filtering conditions for a bulk
delete (flush) operation. This version uses a new nlmsghdr delete flag
called NLM_F_BULK in combination with a new ndo_fdb_del_bulk op which is
used to signal that the driver supports bulk deletes (that avoids
pushing common mac address checks to ndo_fdb_del implementations and
also has a different prototype and parsed attribute expectations, more
info in patch 03). The new delete flag can be used for any RTM_DEL*
type, implementations just need to be careful with older kernels which
are doing non-strict attribute parses. A new rtnl flag
(RTNL_FLAG_BULK_DEL_SUPPORTED) is used to show that the delete supports
NLM_F_BULK. A proper error is returned if bulk delete is not supported.
For old kernels I use the fact that mac address attribute (lladdr) is
mandatory in the classic fdb del case, but it's not allowed if bulk
deleting so older kernels will error out.

Patch 01 and 02 are minor rtnetlink cleanups to make the code easier to
read. They remove hardcoded values and use names instead. Patch 03 uses
BIT() for rtnl flags.
Patch 04 adds the new NLM_F_BULK delete request modifier, patch 05 adds
the new bulk delete flag and checks for it if the delete requests have
NLM_F_BULK set, it also warns if rtnl register is called with a non-delete
kind and the bulk delete flag is set.
Patch 06 adds the new ndo_fdb_del_bulk call. Patch 07 adds NLM_F_BULK
support to rtnl_fdb_del, on such request strict parsing is used only for
the supported attributes, and if the ndo is implemented it's called, the
NTF_SELF/MASTER rules are the same as for the standard rtnl_fdb_del.
Patch 08 implements bridge-specific minimal ndo_fdb_del_bulk call which
uses the current br_fdb_flush to delete all entries. Patch 09 adds
filtering support to the new bridge flush op which supports target
ifindex (port or bridge), vlan id and flags/state mask. Patch 10 adds
ndm state and flags mask attributes which will be used for filtering.
Patch 11 converts ndm state/flags and their masks to bridge-private flags
and fills them in the filter descriptor for matching. Finally patch 12
fills in the target ifindex (after validating it) and vlan id (already
validated by rtnl_fdb_flush) for matching. Flush filtering is needed
because user-space applications need a quick way to delete only a
specific set of entries, e.g. mlag implementations need a way to flush only
dynamic entries excluding externally learned ones or only externally
learned ones without static entries etc. Also apps usually want to target
only a specific vlan or port/vlan combination. The current 2 flush
operations (per port and bridge-wide) are not extensible and cannot
provide such filtering.

I decided against embedding new attrs into the old flush attributes for
multiple reasons - proper error handling on unsupported attributes,
older kernels silently flushing all, need for a second mechanism to
signal that the attribute should be parsed (e.g. using boolopts),
special treatment for permanent entries.

Examples:
$ bridge fdb flush dev bridge vlan 100 static
< flush all static entries on vlan 100 >
$ bridge fdb flush dev bridge vlan 1 dynamic
< flush all dynamic entries on vlan 1 >
$ bridge fdb flush dev bridge port ens16 vlan 1 dynamic
< flush all dynamic entries on port ens16 and vlan 1 >
$ bridge fdb flush dev ens16 vlan 1 dynamic master
< as above: flush all dynamic entries on port ens16 and vlan 1 >
$ bridge fdb flush dev bridge nooffloaded nopermanent self
< flush all non-offloaded and non-permanent entries >
$ bridge fdb flush dev bridge static noextern_learn
< flush all static entries which are not externally learned >
$ bridge fdb flush dev bridge permanent
< flush all permanent entries >
$ bridge fdb flush dev bridge port bridge permanent
< flush all permanent entries pointing to the bridge itself >

Example of a flush call with unsupported netlink attribute (NDA_DST):
$ bridge fdb flush dev bridge vlan 100 dynamic dst
Error: Unsupported attribute.

Example of a flush call on an older kernel:
$ bridge fdb flush dev bridge dynamic
Error: invalid address.

Example of calling PF_UNSPEC RTM_DELNEIGH which doesn't support bulk delete
with NLM_F_BULK set (ip neigh is changed to add the flag):
$ ip n del 192.168.122.5 lladdr 00:11:22:33:44:55 dev ens3
Error: Bulk delete is not supported.

Note that all flags have their negated version (static vs nostatic etc)
and there are some tricky cases to handle like "static" which in flag
terms means fdbs that have NUD_NOARP but *not* NUD_PERMANENT, so the
mask matches on both but we need only NUD_NOARP to be set. That's
because permanent entries have both set so we can't just match on
NUD_NOARP. Also note that this flush operation doesn't treat permanent
entries in a special way (fdb_delete vs fdb_delete_local), it will
delete them regardless if any port is using them. We can extend the api
with a flag to do that if needed in the future.

Patch-sets (in order):
 - Initial bulk del infra and fdb flush filtering (this set)
 - iproute2 support
 - selftests

v4: Add and check for rtnl del bulk supported flag when using
    NLM_F_BULK (new patch 05), patches 01 - 03 are also new minor cleanups
    to remove use of raw values and make code easier to read, don't
    rename br_fdb_flush in patch 08, set port ifindex as flush target if
    NDA_IFINDEX is missing and flush was called with port netdev and
    NTF_MASTER (patch 12).

v3: Add NLM_F_BULK delete modifier and ndo_fdb_del_bulk callback,
    patches 01 - 03 and 06 are new. Patch 04 is changed to implement
    bulk_del instead of flush, patches 05, 07 and 08 are adjusted to
    use NDA_ attributes
====================
Signed-off-by: David S. Miller <davem@davemloft.net>