Validate the offset to read from module EEPROM as part of the netlink
policy and remove the corresponding check from the code.

This also makes it possible to query the offset range from user space:

 $ genl ctrl policy name ethtool
 ...
 ID: 0x14  policy[32]:attr[2]: type=U32 range:[0,255]
 ...
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Validate the number of bytes to read from the module EEPROM as part of
the netlink policy and remove the corresponding check from the code.

This also makes it possible to query the length range from user space:

 $ genl ctrl policy name ethtool
 ...
 ID: 0x14  policy[32]:attr[3]: type=U32 range:[1,128]
 ...
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The struct is not visible to user space and therefore should not use the
user visible data types.

Instead, use internal data types like other structures in the file.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The kernel assumes bank 0 when 'ETHTOOL_MSG_MODULE_EEPROM_GET' is sent
without 'ETHTOOL_A_MODULE_EEPROM_BANK'.

Document it as part of the interface documentation.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The 'ETHTOOL_A_MODULE_EEPROM_DATA' attribute is not part of the get
request.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

'ETHTOOL_A_MODULE_EEPROM_DATA' is a binary attribute, not a nested one.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The command is called 'ETHTOOL_MSG_MODULE_EEPROM_GET', not
'ETHTOOL_MSG_MODULE_EEPROM'.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Return statements are not needed in Void function.
Signed-off-by: gushengxian <gushengxian@yulong.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In preparation for FORTIFY_SOURCE performing compile-time and run-time
field bounds checking for memcpy(), memmove(), and memset(), avoid
intentionally writing across neighboring fields.

Add flexible array to represent start of buf_info, improving readability
and avoid future warning where memcpy() thinks it is writing past the
end of the structure.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

In case CONFIG_VLAN_8021Q is not set, there will be no call down to the
b53 driver to ensure that the default PVID VLAN entry will be configured
with the appropriate untagged attribute towards the CPU port. We were
implicitly relying on dsa_slave_vlan_rx_add_vid() to do that for us,
instead make it explicit.
Reported-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In preparation for FORTIFY_SOURCE performing compile-time and run-time
field bounds checking for memcpy(), memmove(), and memset(), avoid
intentionally writing across neighboring fields.

To avoid having memcpy() think a u64 "prof" is being written beyond,
adjust the prof member type by adding struct nix_bandprof_s to the union
to match the other structs. This silences the following future warning:

In file included from ./include/linux/string.h:253,
                 from ./include/linux/bitmap.h:10,
                 from ./include/linux/cpumask.h:12,
                 from ./arch/x86/include/asm/cpumask.h:5,
                 from ./arch/x86/include/asm/msr.h:11,
                 from ./arch/x86/include/asm/processor.h:22,
                 from ./arch/x86/include/asm/timex.h:5,
                 from ./include/linux/timex.h:65,
                 from ./include/linux/time32.h:13,
                 from ./include/linux/time.h:60,
                 from ./include/linux/stat.h:19,
                 from ./include/linux/module.h:13,
                 from drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c:11:
In function '__fortify_memcpy_chk',
    inlined from '__fortify_memcpy' at ./include/linux/fortify-string.h:310:2,
    inlined from 'rvu_nix_blk_aq_enq_inst' at drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c:910:5:
./include/linux/fortify-string.h:268:4: warning: call to '__write_overflow_field' declared with attribute warning: detected write beyond size of field (1st parameter); please use struct_group() [-Wattribute-warning]
  268 |    __write_overflow_field();
      |    ^~~~~~~~~~~~~~~~~~~~~~~~

drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c:
...
                        else if (req->ctype == NIX_AQ_CTYPE_BANDPROF)
                                memcpy(&rsp->prof, ctx,
                                       sizeof(struct nix_bandprof_s));
...
Signed-off-by: Kees Cook <keescook@chromium.org>
Tested-by: Subbaraya Sundeep<sbhatta@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Sergey Ryazanov says:

====================
net: WWAN link creation improvements

This series is intended to make the WWAN network links management easier
for WWAN device drivers.

The series begins with adding support for network links creation to the
WWAN HW simulator to facilitate code testing. Then there are a couple of
changes that prepe the WWAN core code for further modifications. The
following patches (4-6) simplify driver unregistering procedures by
performing the created links cleanup in the WWAN core. 7th patch is to
avoid the odd hold of a driver module. Next patches (8th and 9th) make
it easier for drivers to create a network interface for a default data
channel. Finally, 10th patch adds support for reporting of data link
(aka channel aka context) id to make user aware which network
interface is bound to which WWAN device data channel.

All core changes have been tested with the HW simulator. The MHI and
IOSM drivers were only compile tested as I have no access to this
hardware. So the coresponding patches require ACK from the driver
authors.

Changelog:
  v1 -> v2:
    * rebased on top of latest net-next
    * patch that reworks the creation of mhi_net default netdev was
      dropped; as Loic explained, this network device has different
      purpose depending on a driver mode; Loic has a plan to rework the
      mhi_net driver, so we will defer the default netdev creation
      reworkings
    * add a new patch that creates a default network interface for IOSM
      modems
    * 7th, 8th, 10th patches have a minor updates (see the patches for
      details)
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

The WWAN core not only multiplex the netdev configuration data, but
process it too, and needs some space to store its private data
associated with the netdev. Add a structure to keep common WWAN core
data. The structure will be stored inside the netdev private data before
WWAN driver private data and have a field to make it easier to access
the driver data. Also add a helper function that simplifies drivers
access to their data.

At the moment we use the common WWAN private data to store the WWAN data
link (channel) id at the time the link is created, and report it back to
user using the .fill_info() RTNL callback. This should help the user to
be aware which network interface is bound to which WWAN device data
channel.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
CC: M Chetan Kumar <m.chetan.kumar@intel.com>
CC: Intel Corporation <linuxwwan@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Utilize the just introduced WWAN core feature to create a default netdev
for the default data (IP MUX) channel.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
CC: M Chetan Kumar <m.chetan.kumar@intel.com>
CC: Intel Corporation <linuxwwan@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Most, if not each WWAN device driver will create a netdev for the
default data channel. Therefore, add an option for the WWAN netdev ops
registration function to create a default netdev for the WWAN device.

A WWAN device driver should pass a default data channel link id to the
ops registering function to request the creation of a default netdev, or
a special value WWAN_NO_DEFAULT_LINK to inform the WWAN core that the
default netdev should not be created.

For now, only wwan_hwsim utilize the default link creation option. Other
drivers will be reworked next.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
CC: M Chetan Kumar <m.chetan.kumar@intel.com>
CC: Intel Corporation <linuxwwan@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The WWAN netdev ops owner holding was used to protect from the
unexpected memory disappear. This approach causes a dependency cycle
(driver -> core -> driver) and effectively prevents a WWAN driver
unloading. E.g. WWAN hwsim could not be unloaded until all simulated
devices are removed:

~# modprobe wwan_hwsim devices=2
~# lsmod | grep wwan
wwan_hwsim             16384  2
wwan                   20480  1 wwan_hwsim
~# rmmod wwan_hwsim
rmmod: ERROR: Module wwan_hwsim is in use
~# echo > /sys/kernel/debug/wwan_hwsim/hwsim0/destroy
~# echo > /sys/kernel/debug/wwan_hwsim/hwsim1/destroy
~# lsmod | grep wwan
wwan_hwsim             16384  0
wwan                   20480  1 wwan_hwsim
~# rmmod wwan_hwsim

For a real device driver this will cause an inability to unload module
until a served device is physically detached.

Since the last commit we are removing all child netdev(s) when a driver
unregister the netdev ops. This allows us to permit the driver
unloading, since any sane driver will call ops unregistering on a device
deinitialization. So, remove the holding of an ops owner to make it
easier to unload a driver module. The owner field has also beed removed
from the ops structure as there are no more users of this field.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Reviewed-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since the last commit, the WWAN core will remove all our network
interfaces for us at the time of the WWAN netdev ops unregistering.
Therefore, we can safely drop the custom code that cleans the list of
created netdevs. Anyway it no longer removes any netdev, since all
netdevs were removed earlier in the wwan_unregister_ops() call.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Reviewed-by: M Chetan Kumar <m.chetan.kumar@intel.com>
CC: M Chetan Kumar <m.chetan.kumar@intel.com>
CC: Intel Corporation <linuxwwan@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

We use the ops owner module hold to protect against ops memory
disappearing. But this approach does not protect us from a driver that
unregisters ops but forgets to remove netdev(s) that were created using
this ops. In such case, we are left with netdev(s), which can not be
removed since ops is gone. Moreover, batch netdevs removing on
deinitialization is a desireable option for WWAN drivers as it is a
quite common task.

Implement deletion of all created links on WWAN netdev ops unregistering
in the same way that RTNL removes all links on RTNL ops unregistering.
Simply remove all child netdevs of a device whose WWAN netdev ops is
unregistering. This way we protecting the kernel from buggy drivers and
make it easier to write a driver deinitialization code.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Reviewed-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Use unregister_netdevice_queue() instead of simple
unregister_netdevice() if the WWAN netdev ops does not provide a dellink
callback. This will help to accelerate deletion of multiple netdevs.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Reviewed-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

The setup callback will be unconditionally passed to the
alloc_netdev_mqs(), where the NULL pointer dereference will cause the
kernel panic. So refuse to register WWAN netdev ops with warning
generation if the setup callback is not provided.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Reviewed-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

It is unlikely that RTNL callbacks will call WWAN ops (un-)register
functions, but it is highly likely that the ops (un-)register functions
will use RTNL link create/destroy handlers. So move the WWAN network
interface ops (un-)register functions below the RTNL callbacks to be
able to call them without forward declarations.

No functional changes, just code relocation.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add support for networking interface creation via the WWAN core by
registering the WWAN netdev creation ops for each simulated WWAN device.
Implemented minimalistic netdev support where the xmit callback just
consumes all egress skbs.

This should help with WWAN network interfaces creation testing.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Mat Martineau says:

====================
mptcp: A few optimizations

Here is a set of patches that we've accumulated and tested in the MPTCP
tree.

Patch 1 removes the MPTCP-level tx skb cache that added complexity but
did not provide a meaningful benefit.

Patch 2 uses the fast socket lock in more places.

Patch 3 improves handling of a data-ready flag.

Patch 4 deletes an unnecessary and racy connection state check.

Patch 5 adds a MIB counter for one type of invalid MPTCP header.

Patch 6 improves self test failure output.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Without this modification, we were often displaying this error messages:

  FAIL: Could not even run loopback test

But $ret could have been set to a non 0 value in many different cases:

- net.mptcp.enabled=0 is not working as expected
- setsockopt(..., TCP_ULP, "mptcp", ...) is allowed
- ping between each netns are failing
- tests between ns1 as a receiver and ns>1 are failing
- other tests not involving ns1 as a receiver are failing

So not only for the loopback test.

Now a clearer message, including the time it took to run all tests, is
displayed.
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Account this exceptional events for better introspection.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently we check the msk state to avoid enqueuing new
skbs at msk shutdown time.

Such test is racy - as we can't acquire the msk socket lock -
and useless, as the caller already checked the subflow
field 'disposable', covering the same scenario in a race
free manner - read and updated under the ssk socket lock.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

If we don't flush entirely the receive queue, we need set
again such bit later. We can simply avoid clearing it.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There are a bunch of callsite where the ssk socket
lock is acquired using the full-blown version eligible for
the fast variant. Let's move to the latter.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The mentioned cache was introduced to reduce the number of skb
allocation in atomic context, but the required complexity is
excessive.

This change remove the mentioned cache.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Marcin Wojtas says:

====================
ACPI MDIO support for Marvell controllers

The third version of the patchset main change is
dropping a clock handling optimisation patch
for mvmdio driver. Other than that it sets
explicit dependency on FWNODE_MDIO for CONFIG_FSL_XGMAC_MDIO
and applies minor cosmetic improvements (please see the
'Changelog' below).

The firmware ACPI description is exposed in the public github branch:
https://github.com/semihalf-wojtas-marcin/edk2-platforms/commits/acpi-mdio-r20210613
There is also MacchiatoBin firmware binary available for testing:
https://drive.google.com/file/d/1eigP_aeM4wYQpEaLAlQzs3IN_w1-kQr0

I'm looking forward to the comments or remarks.

Best regards,
Marcin

Changelog:
v2->v3
* Rebase on top of net-next/master.
* Drop "net: mvmdio: simplify clock handling" patch.
* 1/6 - fix code block comments.
* 2/6 - unchanged
* 3/6 - add "depends on FWNODE_MDIO" for CONFIG_FSL_XGMAC_MDIO
* 4/6 - drop mention about the clocks from the commit message.
* 5/6 - unchanged
* 6/6 - add Andrew's RB.

v1->v2
* 1/7 - new patch
* 2/7 - new patch
* 3/7 - new patch
* 4/7 - new patch
* 5/7 - remove unnecessary `if (has_acpi_companion())` and rebase onto
        the new clock handling
* 6/7 - remove deprecated comment
* 7/7 - no changes
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

The 'has_phy' field from struct mvpp2_port is no longer used.
Remove it.
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Now that the MDIO and phylink are supported in the ACPI
world, enable to use them in the mvpp2 driver. Ensure a backward
compatibility with the firmware whose ACPI description does
not contain the necessary elements for the proper phy handling
and fall back to relying on the link interrupts instead.
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch introducing ACPI support for the mvmdio driver by adding
acpi_match_table with two entries:

* "MRVL0100" for the SMI operation
* "MRVL0101" for the XSMI mode
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Utilize the newly added helper routine
for registering the MDIO bus via fwnode_
interface.
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch introduces a new helper function that
wraps acpi_/of_ mdiobus_register() and allows its
usage via common fwnode_ interface.

Fall back to raw mdiobus_register() in case CONFIG_FWNODE_MDIO
is not enabled, in order to satisfy compatibility
in all future user drivers.
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Document additional MAC configuration modes which can be processed
by the existing fwnode_ phylink helpers:

* "managed" standard ACPI _DSD property [1]
* "fixed-link" data-only subnode linked in the _DSD package via
  generic mechanism of the hierarchical data extension [2]

[1] https://www.uefi.org/sites/default/files/resources/_DSD-device-properties-UUID.pdf
[2] https://github.com/UEFI/DSD-Guide/blob/main/dsd-guide.pdfSigned-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Make sure the_virtio_vsock is not NULL before dereferencing it.

general protection fault, probably for non-canonical address 0xdffffc0000000071: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000388-0x000000000000038f]
CPU: 0 PID: 8452 Comm: syz-executor406 Not tainted 5.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:virtio_transport_seqpacket_allow+0xbf/0x210 net/vmw_vsock/virtio_transport.c:503
Code: e8 c6 d9 ab f8 84 db 0f 84 0f 01 00 00 e8 09 d3 ab f8 48 8d bd 88 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 2a 01 00 00 44 0f b6 a5 88 03 00 00
RSP: 0018:ffffc90003757c18 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000071 RSI: ffffffff88c908e7 RDI: 0000000000000388
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff88c90a06 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff88c90840 R14: 0000000000000000 R15: 0000000000000001
FS:  0000000001bee300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000082 CR3: 000000002847e000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vsock_assign_transport+0x575/0x700 net/vmw_vsock/af_vsock.c:490
 vsock_connect+0x200/0xc00 net/vmw_vsock/af_vsock.c:1337
 __sys_connect_file+0x155/0x1a0 net/socket.c:1824
 __sys_connect+0x161/0x190 net/socket.c:1841
 __do_sys_connect net/socket.c:1851 [inline]
 __se_sys_connect net/socket.c:1848 [inline]
 __x64_sys_connect+0x6f/0xb0 net/socket.c:1848
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x43ee69
Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd49e7c788 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee69
RDX: 0000000000000010 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 0000000000402e50 R08: 0000000000000000 R09: 0000000000400488
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402ee0
R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488

Fixes: 53efbba1 ("virtio/vsock: enable SEQPACKET for transport")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Arseny Krasnov <arseny.krasnov@kaspersky.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since these strings are expected to be NUL-terminated and the buffers
are exactly sized (in vnic_client_data_len()) with no padding, strncpy()
can be safely replaced with strscpy() here, as strncpy() on
NUL-terminated string is considered deprecated[1]. This has the
side-effect of silencing a -Warray-bounds warning due to the compiler
being confused about the vlcd incrementing:

In file included from ./include/linux/string.h:253,
                 from ./include/linux/bitmap.h:10,
                 from ./include/linux/cpumask.h:12,
                 from ./include/linux/mm_types_task.h:14,
                 from ./include/linux/mm_types.h:5,
                 from ./include/linux/buildid.h:5,
                 from ./include/linux/module.h:14,
                 from drivers/net/ethernet/ibm/ibmvnic.c:35:
In function '__fortify_strncpy',
    inlined from 'vnic_add_client_data' at drivers/net/ethernet/ibm/ibmvnic.c:3919:2:
./include/linux/fortify-string.h:39:30: warning: '__builtin_strncpy' offset 12 from the object at 'v
lcd' is out of the bounds of referenced subobject 'name' with type 'char[]' at offset 12 [-Warray-bo
unds]
   39 | #define __underlying_strncpy __builtin_strncpy
      |                              ^
./include/linux/fortify-string.h:51:9: note: in expansion of macro '__underlying_strncpy'
   51 |  return __underlying_strncpy(p, q, size);
      |         ^~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/ibm/ibmvnic.c: In function 'vnic_add_client_data':
drivers/net/ethernet/ibm/ibmvnic.c:3883:7: note: subobject 'name' declared here
 3883 |  char name[];
      |       ^~~~

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings

Cc: Dany Madden <drt@linux.ibm.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Cc: Thomas Falcon <tlfalcon@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Similar to commit 3b707c30 ("net: dev_is_mac_header_xmit() true for
ARPHRD_RAWIP"), add ARPHRD_IP6GRE to dev_is_mac_header_xmit(), to make
ip6gre compatible with act_mirred and __bpf_redirect().
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This reverts commit 0dca2c74.

The commit in question breaks hardware offload of flower filters.

Quoting Vladimir Oltean <olteanv@gmail.com>:

 fl_hw_replace_filter() and fl_reoffload() create a struct
 flow_cls_offload with a rule->match.mask member derived from the mask
 of the software classifier: &f->mask->key - that same mask that is used
 for initializing the flow dissector keys, and the one from which Boris
 removed the basic.n_proto member because it was bothering him.
Reported-by: Vadym Kochan <vadym.kochan@plvision.eu>
Signed-off-by: Boris Sukholitko <boris.sukholitko@broadcom.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>