Add bond_ether_setup helper which is used to fix ether_setup() calls in the
bonding driver. It takes care of both IFF_MASTER and IFF_SLAVE flags, the
former is always restored and the latter only if it was set.
If the bond enslaves non-ARPHRD_ETHER device (changes its type), then
releases it and enslaves ARPHRD_ETHER device (changes back) then we
use ether_setup() to restore the bond device type but it also resets its
flags and removes IFF_MASTER and IFF_SLAVE[1]. Use the bond_ether_setup
helper to restore both after such transition.

[1] reproduce (nlmon is non-ARPHRD_ETHER):
 $ ip l add nlmon0 type nlmon
 $ ip l add bond2 type bond mode active-backup
 $ ip l set nlmon0 master bond2
 $ ip l set nlmon0 nomaster
 $ ip l add bond1 type bond
 (we use bond1 as ARPHRD_ETHER device to restore bond2's mode)
 $ ip l set bond1 master bond2
 $ ip l sh dev bond2
 37: bond2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether be:d7:c5:40:5b:cc brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68 maxmtu 1500
 (notice bond2's IFF_MASTER is missing)

Fixes: e36b9d16 ("bonding: clean muticast addresses when device changes type")
Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Yoshihiro Shimoda says:

====================
net: renesas: rswitch: Fix rx and timestamp

I got reports locally about issues on the rswitch driver.
So, fix the issues.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Since the GWCA has the TX timestamp feature, this driver
should not disable it if one of ports is opened. So, fix it.

Reported-by: Phong Hoang <phong.hoang.wz@renesas.com>
Fixes: 33f5d733 ("net: renesas: rswitch: Improve TX timestamp accuracy")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

If the RX descriptor doesn't have any data, the output value of quote
from rswitch_rx() will be increased unexpectedily. So, fix it.

Reported-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
Fixes: 3590918b ("net: ethernet: renesas: Add support for "Ethernet Switch"")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In vnet_port_probe() and vsw_port_probe(), we should
check the return value of mdesc_grab() as it may
return NULL which can caused NPD bugs.

Fixes: 5d01fa0c ("ldmvsw: Add ldmvsw.c driver code")
Fixes: 43fdf274 ("[SPARC64]: Abstract out mdesc accesses for better MD update handling.")
Signed-off-by: Liang He <windhl@126.com>
Reviewed-by: Piotr Raczynski <piotr.raczynski@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Alex Elder says:

====================
net: ipa: minor bug fixes

The four patches in this series fix some errors, though none of them
cause any compile or runtime problems.

The first changes the files included by "drivers/net/ipa/reg.h" to
ensure everything it requires is included with the file.  It also
stops unnecessarily including another file.  The prerequisites are
apparently satisfied other ways, currently.

The second adds two struct declarations to "gsi_reg.h", to ensure
they're declared before they're used later in the file.  Again, it
seems these declarations are currently resolved wherever this file
is included.

The third removes register definitions that were added for IPA v5.0
that are not needed.  And the last updates some validity checks for
IPA v5.0 registers.  No IPA v5.0 platforms are yet supported, so the
issues resolved here were never harmful.

Versions 2 and 3 of this series change the "Fixes" tags in patches
so they supply legitimate commit hashes.
====================

Link: https://lore.kernel.org/r/20230316145136.1795469-1-elder@linaro.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

A recent commit defined HW_PARAM_4 as a GSI register ID but did not
add it to gsi_reg_id_valid() to indicate it's valid (for IPA v5.0+).
Add version checks for the HW_PARAM_2 and INTER_EE IRQ GSI registers
there as well.

IPA v5.0 supports up to 8 source and destination resource groups.
Update the validity check (and the comments where the register IDs
are defined) to reflect that.  Similarly update comments and
validity checks for the hash/cache-related registers.

Note that this patch fixes an omission and constrains things
further, but these don't technically represent bugs.

Fixes: f651334e ("net: ipa: add HW_PARAM_4 GSI register")
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

A recent commit defined a few IPA registers used for IPA v5.0+.
One of those was a mistake.  Although the filter and router caches
get *flushed* using a single register, they use distinct registers
(ENDP_FILTER_CACHE_CFG and ENDP_ROUTER_CACHE_CFG) for configuration.

And although there *exists* a FILT_ROUT_CACHE_CFG register, it is
not needed in upstream code.  So get rid of definitions related to
FILT_ROUT_CACHE_CFG, because they are not needed.

Fixes: 8ba59716 ("net: ipa: define IPA v5.0+ registers")
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

When gsi_reg_init() got added, its declaration was added to
"gsi_reg.h" without declaring the two struct pointer types it uses.
Add these struct declarations to "gsi_reg.h".

Fixes: 3c506add ("net: ipa: introduce gsi_reg_init()")
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

When "reg.h" got created, it included calls to WARN() and WARN_ON().
Those macros are defined via <linux/bug.h>.  In addition, it uses
is_power_of_2(), which is defined in <linux/log2.h>.  Include those
files so IPA "reg.h" has access to all definitions it requires.

Meanwhile, <linux/bits.h> is included but nothing defined therein
is required directly in "reg.h", so get rid of that.

Fixes: 81772e44 ("net: ipa: start generalizing "ipa_reg"")
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Drivers will commonly perform feature setting during init, if they use
the xdp_set_features_flag() helper they'll likely run into an ASSERT_RTNL()
inside call_netdevice_notifiers_info().

Don't call the notifier until the device is actually registered.
Nothing should be tracking the device until its registered and
after its unregistration has started.

Fixes: 4d5ab0ad ("net/mlx5e: take into account device reconfiguration for xdp_features flag")
Link: https://lore.kernel.org/r/20230316220234.598091-1-kuba@kernel.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Hangbin Liu says:

====================
net/sched: fix parsing of TCA_EXT_WARN_MSG for tc action

In my previous commit 0349b877 ("sched: add new attr TCA_EXT_WARN_MSG
to report tc extact message") I didn't notice the tc action use different
enum with filter. So we can't use TCA_EXT_WARN_MSG directly for tc action.

Let's rever the previous fix 923b2e30 ("net/sched: act_api: move
TCA_EXT_WARN_MSG to the correct hierarchy") and add a new
TCA_ROOT_EXT_WARN_MSG for tc action specifically.

Here is the tdc test result:

1..1119
ok 1 d959 - Add cBPF action with valid bytecode
ok 2 f84a - Add cBPF action with invalid bytecode
ok 3 e939 - Add eBPF action with valid object-file
ok 4 282d - Add eBPF action with invalid object-file
ok 5 d819 - Replace cBPF bytecode and action control
ok 6 6ae3 - Delete cBPF action
ok 7 3e0d - List cBPF actions
ok 8 55ce - Flush BPF actions
ok 9 ccc3 - Add cBPF action with duplicate index
ok 10 89c7 - Add cBPF action with invalid index
[...]
ok 1115 2348 - Show TBF class
ok 1116 84a0 - Create TEQL with default setting
ok 1117 7734 - Create TEQL with multiple device
ok 1118 34a9 - Delete TEQL with valid handle
ok 1119 6289 - Show TEQL stats
====================

Link: https://lore.kernel.org/r/20230316033753.2320557-1-liuhangbin@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In my previous commit 0349b877 ("sched: add new attr TCA_EXT_WARN_MSG
to report tc extact message") I didn't notice the tc action use different
enum with filter. So we can't use TCA_EXT_WARN_MSG directly for tc action.
Let's add a TCA_ROOT_EXT_WARN_MSG for tc action specifically and put this
param before going to the TCA_ACT_TAB nest.

Fixes: 0349b877 ("sched: add new attr TCA_EXT_WARN_MSG to report tc extact message")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This reverts commit 923b2e30.

This is not a correct fix as TCA_EXT_WARN_MSG is not a hierarchy to
TCA_ACT_TAB. I didn't notice the TC actions use different enum when adding
TCA_EXT_WARN_MSG. To fix the difference I will add a new WARN enum in
TCA_ROOT_MAX as Jamal suggested.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The blamed commit has replaced a ksz_write8() call to address
REG_PORT_5_CTRL_6 (0x56) with a ksz_set_xmii() -> ksz_pwrite8() call to
regs[P_XMII_CTRL_1], which is also defined as 0x56 for ksz8795_regs[].

The trouble is that, when compared to ksz_write8(), ksz_pwrite8() also
adjusts the register offset with the port base address. So in reality,
ksz_pwrite8(offset=0x56) accesses register 0x56 + 0x50 = 0xa6, which in
this switch appears to be unmapped, and the RGMII delay configuration on
the CPU port does nothing.

So if the switch wasn't fine with the RGMII delay configuration done
through pin strapping and relied on Linux to apply a different one in
order to pass traffic, this is now broken.

Using the offset translation logic imposed by ksz_pwrite8(), the correct
value for regs[P_XMII_CTRL_1] should have been 0x6 on ksz8795_regs[], in
order to really end up accessing register 0x56.

Static code analysis shows that, despite there being multiple other
accesses to regs[P_XMII_CTRL_1] in this driver, the only code path that
is applicable to ksz8795_regs[] and ksz8_dev_ops is ksz_set_xmii().
Therefore, the problem is isolated to RGMII delays.

In its current form, ksz8795_regs[] contains the same value for
P_XMII_CTRL_0 and for P_XMII_CTRL_1, and this raises valid suspicions
that writes made by the driver to regs[P_XMII_CTRL_0] might overwrite
writes made to regs[P_XMII_CTRL_1] or vice versa.

Again, static analysis shows that the only accesses to P_XMII_CTRL_0
from the driver are made from code paths which are not reachable with
ksz8_dev_ops. So the accesses made by ksz_set_xmii() are safe for this
switch family.

[ vladimiroltean: rewrote commit message ]

Fixes: c476bede ("net: dsa: microchip: ksz8795: use common xmii function")
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20230315231916.2998480-1-vladimir.oltean@nxp.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Jakub Kicinski says:

====================
ynl: another license adjustment

Hopefully the last adjustment to the licensing of the specs.
I'm still the author so should be fine to do this.
====================

Link: https://lore.kernel.org/r/20230315230351.478320-1-kuba@kernel.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The (only recently documented) expectation is that all specs
are under a certain license, but we don't actually enforce it.
What's worse we then go ahead and assume the license was right,
outputting the expected license into generated files.

Fixes: 37d9df22 ("ynl: re-license uniformly under GPL-2.0 OR BSD-3-Clause")
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

I relicensed Netlink spec code to GPL-2.0 OR BSD-3-Clause but
we still put a slightly different license on the uAPI header
than the rest of the code. Use the Linux-syscall-note on all
the specs and all generated code. It's moot for kernel code,
but should not hurt. This way the licenses match everywhere.

Cc: Chuck Lever <chuck.lever@oracle.com>
Fixes: 37d9df22 ("ynl: re-license uniformly under GPL-2.0 OR BSD-3-Clause")
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

definitions are optional, commit in question breaks cli for ethtool.

Fixes: 6517a60b ("tools: ynl: move the enum classes to shared code")
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Saeed Mahameed says:

====================
mlx5 fixes 2023-03-15

This series provides bug fixes to mlx5 driver.

* tag 'mlx5-fixes-2023-03-15' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux:
  net/mlx5e: TC, Remove error message log print
  net/mlx5e: TC, fix cloned flow attribute
  net/mlx5e: TC, fix missing error code
  net/sched: TC, fix raw counter initialization
  net/mlx5e: Lower maximum allowed MTU in XSK to match XDP prerequisites
  net/mlx5: Set BREAK_FW_WAIT flag first when removing driver
  net/mlx5e: kTLS, Fix missing error unwind on unsupported cipher type
  net/mlx5e: Fix cleanup null-ptr deref on encap lock
  net/mlx5: E-switch, Fix missing set of split_count when forward to ovs internal port
  net/mlx5: E-switch, Fix wrong usage of source port rewrite in split rules
  net/mlx5: Disable eswitch before waiting for VF pages
  net/mlx5: Fix setting ec_function bit in MANAGE_PAGES
  net/mlx5e: Don't cache tunnel offloads capability
  net/mlx5e: Fix macsec ASO context alignment
====================

Link: https://lore.kernel.org/r/20230315225847.360083-1-saeed@kernel.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Recently, when automatically merging -net and net-next in MPTCP devel
tree, our CI reported [1] a conflict in hsr, the same as the one
reported by Stephen in netdev [2].

When looking at the conflict, I noticed it is in fact the v1 [3] that
has been applied in -net and the v2 [4] in net-next. Maybe the v1 was
applied by accident.

As mentioned by Jakub Kicinski [5], the new condition makes more sense
before the net_ratelimit(), not to update net_ratelimit's state which is
unnecessary if we're not going to print either way.

Here, this modification applies the v2 but in -net.

Link: https://github.com/multipath-tcp/mptcp_net-next/actions/runs/4423171069 [1]
Link: https://lore.kernel.org/netdev/20230315100914.53fc1760@canb.auug.org.au/ [2]
Link: https://lore.kernel.org/netdev/20230307133229.127442-1-koverskeid@gmail.com/ [3]
Link: https://lore.kernel.org/netdev/20230309092302.179586-1-koverskeid@gmail.com/ [4]
Link: https://lore.kernel.org/netdev/20230308232001.2fb62013@kernel.org/

 [5]
Fixes: 28e8cabe ("net: hsr: Don't log netdev_err message on unknown prp dst node")
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Reviewed-by: Steen Hegelund <Steen.Hegelund@microchip.com>
Link: https://lore.kernel.org/r/20230315-net-20230315-hsr_framereg-ratelimit-v1-1-61d2ef176d11@tessares.net


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This fixes an issue where ->hour would erroneously get zeroed out
instead of ->min because of a bad copy paste.

Found by Linux Verification Center (linuxtesting.org) with the SVACE
static analysis tool.

Fixes: f240b688 ("qed: Add support for processing fcoe tlv request.")
Signed-off-by: Daniil Tatianin <d-tatianin@yandex-team.ru>
Link: https://lore.kernel.org/r/20230315194618.579286-1-d-tatianin@yandex-team.ru


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The `devlink -j port show` command output may not contain the "flavour"
key, an example from Ubuntu 22.10 s390x LPAR(5.19.0-37-generic), with
mlx4 driver and iproute2-5.15.0:
  {"port":{"pci/0001:00:00.0/1":{"type":"eth","netdev":"ens301"},
           "pci/0001:00:00.0/2":{"type":"eth","netdev":"ens301d1"},
           "pci/0002:00:00.0/1":{"type":"eth","netdev":"ens317"},
           "pci/0002:00:00.0/2":{"type":"eth","netdev":"ens317d1"}}}

This will cause a KeyError exception.

Create a validate_devlink_output() to check for this "flavour" from
devlink command output to avoid this KeyError exception. Also let
it handle the check for `devlink -j dev show` output in main().

Apart from this, if the test was not started because the max lanes of
the designated device is 0. The script will still return 0 and thus
causing a false-negative test result.

Use a found_max_lanes flag to determine if these tests were skipped
due to this reason and return KSFT_SKIP to make it more clear.

Link: https://bugs.launchpad.net/bugs/1937133


Fixes: f3348a82 ("selftests: net: Add port split test")
Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com>
Link: https://lore.kernel.org/r/20230315165353.229590-1-po-hsu.lin@canonical.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

netdev->dev_addr is now const, we can't write to it directly.
Copy scrambled mac address octects into an array then eth_hw_addr_set().

Fixes: adeef3e3 ("net: constify netdev->dev_addr")
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
Link: https://lore.kernel.org/r/20230315134117.79511-1-tsbogend@alpha.franken.de


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

iucv_irq_data needs to be 4 bytes larger.
These bytes are not used by the iucv module, but written by
the z/VM hypervisor in case a CPU is deconfigured.

Reported as:
BUG dma-kmalloc-64 (Not tainted): kmalloc Redzone overwritten
-----------------------------------------------------------------------------
0x0000000000400564-0x0000000000400567 @offset=1380. First byte 0x80 instead of 0xcc
Allocated in iucv_cpu_prepare+0x44/0xd0 age=167839 cpu=2 pid=1
__kmem_cache_alloc_node+0x166/0x450
kmalloc_node_trace+0x3a/0x70
iucv_cpu_prepare+0x44/0xd0
cpuhp_invoke_callback+0x156/0x2f0
cpuhp_issue_call+0xf0/0x298
__cpuhp_setup_state_cpuslocked+0x136/0x338
__cpuhp_setup_state+0xf4/0x288
iucv_init+0xf4/0x280
do_one_initcall+0x78/0x390
do_initcalls+0x11a/0x140
kernel_init_freeable+0x25e/0x2a0
kernel_init+0x2e/0x170
__ret_from_fork+0x3c/0x58
ret_from_fork+0xa/0x40
Freed in iucv_init+0x92/0x280 age=167839 cpu=2 pid=1
__kmem_cache_free+0x308/0x358
iucv_init+0x92/0x280
do_one_initcall+0x78/0x390
do_initcalls+0x11a/0x140
kernel_init_freeable+0x25e/0x2a0
kernel_init+0x2e/0x170
__ret_from_fork+0x3c/0x58
ret_from_fork+0xa/0x40
Slab 0x0000037200010000 objects=32 used=30 fp=0x0000000000400640 flags=0x1ffff00000010200(slab|head|node=0|zone=0|
Object 0x0000000000400540 @offset=1344 fp=0x0000000000000000
Redzone  0000000000400500: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
Redzone  0000000000400510: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
Redzone  0000000000400520: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
Redzone  0000000000400530: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
Object   0000000000400540: 00 01 00 03 00 00 00 00 00 00 00 00 00 00 00 00  ................
Object   0000000000400550: f3 86 81 f2 f4 82 f8 82 f0 f0 f0 f0 f0 f0 f0 f2  ................
Object   0000000000400560: 00 00 00 00 80 00 00 00 cc cc cc cc cc cc cc cc  ................
Object   0000000000400570: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc  ................
Redzone  0000000000400580: cc cc cc cc cc cc cc cc                          ........
Padding  00000000004005d4: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
Padding  00000000004005e4: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
Padding  00000000004005f4: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a              ZZZZZZZZZZZZ
CPU: 6 PID: 121030 Comm: 116-pai-crypto. Not tainted 6.3.0-20230221.rc0.git4.99b8246b2d71.300.fc37.s390x+debug #1
Hardware name: IBM 3931 A01 704 (z/VM 7.3.0)
Call Trace:
[<000000032aa034ec>] dump_stack_lvl+0xac/0x100
[<0000000329f5a6cc>] check_bytes_and_report+0x104/0x140
[<0000000329f5aa78>] check_object+0x370/0x3c0
[<0000000329f5ede6>] free_debug_processing+0x15e/0x348
[<0000000329f5f06a>] free_to_partial_list+0x9a/0x2f0
[<0000000329f5f4a4>] __slab_free+0x1e4/0x3a8
[<0000000329f61768>] __kmem_cache_free+0x308/0x358
[<000000032a91465c>] iucv_cpu_dead+0x6c/0x88
[<0000000329c2fc66>] cpuhp_invoke_callback+0x156/0x2f0
[<000000032aa062da>] _cpu_down.constprop.0+0x22a/0x5e0
[<0000000329c3243e>] cpu_device_down+0x4e/0x78
[<000000032a61dee0>] device_offline+0xc8/0x118
[<000000032a61e048>] online_store+0x60/0xe0
[<000000032a08b6b0>] kernfs_fop_write_iter+0x150/0x1e8
[<0000000329fab65c>] vfs_write+0x174/0x360
[<0000000329fab9fc>] ksys_write+0x74/0x100
[<000000032aa03a5a>] __do_syscall+0x1da/0x208
[<000000032aa177b2>] system_call+0x82/0xb0
INFO: lockdep is turned off.
FIX dma-kmalloc-64: Restoring kmalloc Redzone 0x0000000000400564-0x0000000000400567=0xcc
FIX dma-kmalloc-64: Object at 0x0000000000400540 not freed

Fixes: 2356f4cb ("[S390]: Rewrite of the IUCV base code, part 2")
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Link: https://lore.kernel.org/r/20230315131435.4113889-1-wintera@linux.ibm.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The aq_xdp_run_prog() function falls back to the XDP_ABORTED action
handler (using a goto) if the operations for any of the other actions fail.
The XDP_ABORTED handler in turn calls the bpf_warn_invalid_xdp_action()
tracepoint. However, the function also jumps into the XDP_PASS helper if no
XDP program is loaded on the device, which means the XDP_ABORTED handler
can be run with a NULL program pointer. This results in a NULL pointer
deref because the tracepoint dereferences the 'prog' pointer passed to it.

This situation can happen in multiple ways:
- If a packet arrives between the removal of the program from the interface
  and the static_branch_dec() in aq_xdp_setup()
- If there are multiple devices using the same driver in the system and
  one of them has an XDP program loaded and the other does not.

Fix this by refactoring the aq_xdp_run_prog() function to remove the 'goto
pass' handling if there is no XDP program loaded. Instead, factor out the
skb building in a separate small helper function.

Fixes: 26efaef7 ("net: atlantic: Implement xdp data plane")
Reported-by: Freysteinn Alfredsson <Freysteinn.Alfredsson@kau.se>
Tested-by: Freysteinn Alfredsson <Freysteinn.Alfredsson@kau.se>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/r/20230315125539.103319-1-toke@redhat.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Packet length check needs to be located after size and align_count
calculation to prevent kernel panic in skb_pull() in case
rx_cmd_a & RX_CMD_A_RED evaluates to true.

Fixes: d8b22831 ("net: usb: smsc75xx: Limit packet length to skb->len")
Signed-off-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Link: https://lore.kernel.org/r/20230316110540.77531-1-szymon.heidrich@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Commit f96a3d74 ("ipv4: Fix incorrect route flushing when source
address is deleted") started to take the table ID field in the FIB info
structure into account when determining if two structures are identical
or not. This field is initialized using the 'fc_table' field in the
route configuration structure, which is not set when adding a route via
IOCTL.

The above can result in user space being able to install two identical
routes that only differ in the table ID field of their associated FIB
info.

Fix by initializing the table ID field in the route configuration
structure in the IOCTL path.

Before the fix:

 # ip route add default via 192.0.2.2
 # route add default gw 192.0.2.2
 # ip -4 r show default
 # default via 192.0.2.2 dev dummy10
 # default via 192.0.2.2 dev dummy10

After the fix:

 # ip route add default via 192.0.2.2
 # route add default gw 192.0.2.2
 SIOCADDRT: File exists
 # ip -4 r show default
 default via 192.0.2.2 dev dummy10

Audited the code paths to ensure there are no other paths that do not
properly initialize the route configuration structure when installing a
route.

Fixes: 5a56a0b3 ("net: Don't delete routes in different VRFs")
Fixes: f96a3d74 ("ipv4: Fix incorrect route flushing when source address is deleted")
Reported-by: gaoxingwang <gaoxingwang1@huawei.com>
Link: https://lore.kernel.org/netdev/20230314144159.2354729-1-gaoxingwang1@huawei.com/


Tested-by: gaoxingwang <gaoxingwang1@huawei.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20230315124009.4015212-1-idosch@nvidia.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Steffen Klassert says:

====================
pull request (net): ipsec 2023-03-15

1) Fix an information leak when dumping algos and encap.
   From Herbert Xu

2) Allow transport-mode states with AF_UNSPEC selector
   to allow for nested transport-mode states.
   From Herbert Xu.

* tag 'ipsec-2023-03-15' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec:
  xfrm: Allow transport-mode states with AF_UNSPEC selector
  xfrm: Zero padding when dumping algos and encap
====================

Link: https://lore.kernel.org/r/20230315105623.1396491-1-steffen.klassert@secunet.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Wolfram Sang says:

====================
net: renesas: set 'mac_managed_pm' at probe time

When suspending/resuming an interface which was not up, we saw mdiobus
related PM handling despite 'mac_managed_pm' being set for RAVB/SH_ETH.
Heiner kindly suggested the fix to set this flag at probe time, not at
init/open time. I implemented his suggestion and it works fine on these
two Renesas drivers.
====================

Link: https://lore.kernel.org/r/20230315074115.3008-1-wsa+renesas@sang-engineering.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

SH_ETH doesn't need mdiobus suspend/resume, that's why it sets
'mac_managed_pm'. However, setting it needs to be moved from init to
probe, so mdiobus PM functions will really never be called (e.g. when
the interface is not up yet during suspend/resume).

Fixes: 6a1dbfef ("net: sh_eth: Fix PHY state warning splat during system resume")
Suggested-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

RAVB doesn't need mdiobus suspend/resume, that's why it sets
'mac_managed_pm'. However, setting it needs to be moved from init to
probe, so mdiobus PM functions will really never be called (e.g. when
the interface is not up yet during suspend/resume).

Fixes: 4924c0cd ("net: ravb: Fix PHY state warning splat during system resume")
Suggested-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Xuan Zhuo says:

====================
virtio_net: fix two bugs related to XDP

This patch set fixes two bugs related to XDP.
These two patch is not associated.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

build_skb_from_xdp_buff() may return NULL, in this case
we need to free the frags of xdp shinfo.

Fixes: fab89baf ("virtio-net: support multi-buffer xdp")
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Because headroom is not passed to page_to_skb(), this causes the shinfo
exceeds the range. Then the frags of shinfo are changed by other process.

[  157.724634] stack segment: 0000 [#1] PREEMPT SMP NOPTI
[  157.725358] CPU: 3 PID: 679 Comm: xdp_pass_user_f Tainted: G            E      6.2.0+ #150
[  157.726401] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/4
[  157.727820] RIP: 0010:skb_release_data+0x11b/0x180
[  157.728449] Code: 44 24 02 48 83 c3 01 39 d8 7e be 48 89 d8 48 c1 e0 04 41 80 7d 7e 00 49 8b 6c 04 30 79 0c 48 89 ef e8 89 b
[  157.730751] RSP: 0018:ffffc90000178b48 EFLAGS: 00010202
[  157.731383] RAX: 0000000000000010 RBX: 0000000000000001 RCX: 0000000000000000
[  157.732270] RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff888100dd0b00
[  157.733117] RBP: 5d5d76010f6e2408 R08: ffff888100dd0b2c R09: 0000000000000000
[  157.734013] R10: ffffffff82effd30 R11: 000000000000a14e R12: ffff88810981ffc0
[  157.734904] R13: ffff888100dd0b00 R14: 0000000000000002 R15: 0000000000002310
[  157.735793] FS:  00007f06121d9740(0000) GS:ffff88842fcc0000(0000) knlGS:0000000000000000
[  157.736794] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  157.737522] CR2: 00007ffd9a56c084 CR3: 0000000104bda001 CR4: 0000000000770ee0
[  157.738420] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  157.739283] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  157.740146] PKRU: 55555554
[  157.740502] Call Trace:
[  157.740843]  <IRQ>
[  157.741117]  kfree_skb_reason+0x50/0x120
[  157.741613]  __udp4_lib_rcv+0x52b/0x5e0
[  157.742132]  ip_protocol_deliver_rcu+0xaf/0x190
[  157.742715]  ip_local_deliver_finish+0x77/0xa0
[  157.743280]  ip_sublist_rcv_finish+0x80/0x90
[  157.743834]  ip_list_rcv_finish.constprop.0+0x16f/0x190
[  157.744493]  ip_list_rcv+0x126/0x140
[  157.744952]  __netif_receive_skb_list_core+0x29b/0x2c0
[  157.745602]  __netif_receive_skb_list+0xed/0x160
[  157.746190]  ? udp4_gro_receive+0x275/0x350
[  157.746732]  netif_receive_skb_list_internal+0xf2/0x1b0
[  157.747398]  napi_gro_receive+0xd1/0x210
[  157.747911]  virtnet_receive+0x75/0x1c0
[  157.748422]  virtnet_poll+0x48/0x1b0
[  157.748878]  __napi_poll+0x29/0x1b0
[  157.749330]  net_rx_action+0x27a/0x340
[  157.749812]  __do_softirq+0xf3/0x2fb
[  157.750298]  do_softirq+0xa2/0xd0
[  157.750745]  </IRQ>
[  157.751563]  <TASK>
[  157.752329]  __local_bh_enable_ip+0x6d/0x80
[  157.753178]  virtnet_xdp_set+0x482/0x860
[  157.754159]  ? __pfx_virtnet_xdp+0x10/0x10
[  157.755129]  dev_xdp_install+0xa4/0xe0
[  157.756033]  dev_xdp_attach+0x20b/0x5e0
[  157.756933]  do_setlink+0x82e/0xc90
[  157.757777]  ? __nla_validate_parse+0x12b/0x1e0
[  157.758744]  rtnl_setlink+0xd8/0x170
[  157.759549]  ? mod_objcg_state+0xcb/0x320
[  157.760328]  ? security_capable+0x37/0x60
[  157.761209]  ? security_capable+0x37/0x60
[  157.762072]  rtnetlink_rcv_msg+0x145/0x3d0
[  157.762929]  ? ___slab_alloc+0x327/0x610
[  157.763754]  ? __alloc_skb+0x141/0x170
[  157.764533]  ? __pfx_rtnetlink_rcv_msg+0x10/0x10
[  157.765422]  netlink_rcv_skb+0x58/0x110
[  157.766229]  netlink_unicast+0x21f/0x330
[  157.766951]  netlink_sendmsg+0x240/0x4a0
[  157.767654]  sock_sendmsg+0x93/0xa0
[  157.768434]  ? sockfd_lookup_light+0x12/0x70
[  157.769245]  __sys_sendto+0xfe/0x170
[  157.770079]  ? handle_mm_fault+0xe9/0x2d0
[  157.770859]  ? preempt_count_add+0x51/0xa0
[  157.771645]  ? up_read+0x3c/0x80
[  157.772340]  ? do_user_addr_fault+0x1e9/0x710
[  157.773166]  ? kvm_read_and_reset_apf_flags+0x49/0x60
[  157.774087]  __x64_sys_sendto+0x29/0x30
[  157.774856]  do_syscall_64+0x3c/0x90
[  157.775518]  entry_SYSCALL_64_after_hwframe+0x72/0xdc
[  157.776382] RIP: 0033:0x7f06122def70

Fixes: 18117a84 ("virtio-net: remove xdp related info from page_to_skb()")
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

It is preferred to use typed property access functions (i.e.
of_property_read_<type> functions) rather than low-level
of_get_property/of_find_property functions for reading properties.
Convert reading boolean properties to of_property_read_bool().

Reviewed-by: Simon Horman <simon.horman@corigine.com>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> # for net/can
Acked-by: Kalle Valo <kvalo@kernel.org>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>
Reviewed-by: Wei Fang <wei.fang@nxp.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Vladimir Oltean says:

====================
Fix MTU reporting for Marvell DSA switches where we can't change it

As explained in patch 2, the driver doesn't know how to change the MTU
on MV88E6165, MV88E6191, MV88E6220, MV88E6250 and MV88E6290, and there
is a regression where it actually reports an MTU value below the
Ethernet standard (1500).

Fixing that shows another issue where DSA is unprepared to be told that
a switch supports an MTU of only 1500, and still errors out. That is
addressed by patch 1.

Testing was not done on "real" hardware, but on a different Marvell DSA
switch, with code modified such that the driver doesn't know how to
change the MTU on that, either.

A key assumption is that these switches don't need any MTU configuration
to pass full MTU-sized, DSA-tagged packets, which seems like a
reasonable assumption to make. My 6390 and 6190 switches, with
.port_set_jumbo_size commented out, certainly don't seem to have any
problem passing MTU-sized traffic, as can be seen in this iperf3 session
captured with tcpdump on the DSA master:

$MAC > $MAC, Marvell DSA mode Forward, dev 2, port 8, untagged, VID 1000,
	FPri 0, ethertype IPv4 (0x0800), length 1518:
	10.0.0.69.49590 > 10.0.0.1.5201: Flags [.], seq 81088:82536,
	ack 1, win 502, options [nop,nop,TS val 2221498829 ecr 3012859850],
	length 1448

I don't want to go all the way and say that the adjustment made by
commit b9c587fe ("dsa: mv88e6xxx: Include tagger overhead when
setting MTU for DSA and CPU ports") is completely unnecessary, just that
there's an equally good chance that the switches with unknown MTU
configuration procedure "just work".
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

There are 3 classes of switch families that the driver is aware of, as
far as mv88e6xxx_change_mtu() is concerned:

- MTU configuration is available per port. Here, the
  chip->info->ops->port_set_jumbo_size() method will be present.

- MTU configuration is global to the switch. Here, the
  chip->info->ops->set_max_frame_size() method will be present.

- We don't know how to change the MTU. Here, none of the above methods
  will be present.

Switch families MV88E6165, MV88E6191, MV88E6220, MV88E6250 and MV88E6290
fall in category 3.

The blamed commit has adjusted the MTU for all 3 categories by EDSA_HLEN
(8 bytes), resulting in a new maximum MTU of 1492 being reported by the
driver for these switches.

I don't have the hardware to test, but I do have a MV88E6390 switch on
which I can simulate this by commenting out its .port_set_jumbo_size
definition from mv88e6390_ops. The result is this set of messages at
probe time:

mv88e6085 d0032004.mdio-mii:10: nonfatal error -34 setting MTU to 1500 on port 1
mv88e6085 d0032004.mdio-mii:10: nonfatal error -34 setting MTU to 1500 on port 2
mv88e6085 d0032004.mdio-mii:10: nonfatal error -34 setting MTU to 1500 on port 3
mv88e6085 d0032004.mdio-mii:10: nonfatal error -34 setting MTU to 1500 on port 4
mv88e6085 d0032004.mdio-mii:10: nonfatal error -34 setting MTU to 1500 on port 5
mv88e6085 d0032004.mdio-mii:10: nonfatal error -34 setting MTU to 1500 on port 6
mv88e6085 d0032004.mdio-mii:10: nonfatal error -34 setting MTU to 1500 on port 7
mv88e6085 d0032004.mdio-mii:10: nonfatal error -34 setting MTU to 1500 on port 8

It is highly implausible that there exist Ethernet switches which don't
support the standard MTU of 1500 octets, and this is what the DSA
framework says as well - the error comes from dsa_slave_create() ->
dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN).

But the error messages are alarming, and it would be good to suppress
them.

As a consequence of this unlikeliness, we reimplement mv88e6xxx_get_max_mtu()
and mv88e6xxx_change_mtu() on switches from the 3rd category as follows:
the maximum supported MTU is 1500, and any request to set the MTU to a
value larger than that fails in dev_validate_mtu().

Fixes: b9c587fe ("dsa: mv88e6xxx: Include tagger overhead when setting MTU for DSA and CPU ports")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently, when dsa_slave_change_mtu() is called on a user port where
dev->max_mtu is 1500 (as returned by ds->ops->port_max_mtu()), the code
will stumble upon this check:

	if (new_master_mtu > mtu_limit)
		return -ERANGE;

because new_master_mtu is adjusted for the tagger overhead but mtu_limit
is not.

But it would be good if the logic went through, for example if the DSA
master really depends on an MTU adjustment to accept DSA-tagged frames.

To make the code pass through the check, we need to adjust mtu_limit for
the overhead as well, if the minimum restriction was caused by the DSA
user port's MTU (dev->max_mtu). A DSA user port MTU and a DSA master MTU
are always offset by the protocol overhead.

Currently no drivers return 1500 .port_max_mtu(), but this is only
temporary and a bug in itself - mv88e6xxx should have done that, but
since commit b9c587fe ("dsa: mv88e6xxx: Include tagger overhead when
setting MTU for DSA and CPU ports") it no longer does. This is a
preparation for fixing that.

Fixes: bfcb8132 ("net: dsa: configure the MTU for switch ports")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ice_qp_dis() intends to stop a given queue pair that is a target of xsk
pool attach/detach. One of the steps is to disable interrupts on these
queues. It currently is broken in a way that txq irq is turned off
*after* HW flush which in turn takes no effect.

ice_qp_dis():
-> ice_qvec_dis_irq()
--> disable rxq irq
--> flush hw
-> ice_vsi_stop_tx_ring()
-->disable txq irq

Below splat can be triggered by following steps:
- start xdpsock WITHOUT loading xdp prog
- run xdp_rxq_info with XDP_TX action on this interface
- start traffic
- terminate xdpsock

[  256.312485] BUG: kernel NULL pointer dereference, address: 0000000000000018
[  256.319560] #PF: supervisor read access in kernel mode
[  256.324775] #PF: error_code(0x0000) - not-present page
[  256.329994] PGD 0 P4D 0
[  256.332574] Oops: 0000 [#1] PREEMPT SMP NOPTI
[  256.337006] CPU: 3 PID: 32 Comm: ksoftirqd/3 Tainted: G           OE      6.2.0-rc5+ #51
[  256.345218] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0008.031920191559 03/19/2019
[  256.355807] RIP: 0010:ice_clean_rx_irq_zc+0x9c/0x7d0 [ice]
[  256.361423] Code: b7 8f 8a 00 00 00 66 39 ca 0f 84 f1 04 00 00 49 8b 47 40 4c 8b 24 d0 41 0f b7 45 04 66 25 ff 3f 66 89 04 24 0f 84 85 02 00 00 <49> 8b 44 24 18 0f b7 14 24 48 05 00 01 00 00 49 89 04 24 49 89 44
[  256.380463] RSP: 0018:ffffc900088bfd20 EFLAGS: 00010206
[  256.385765] RAX: 000000000000003c RBX: 0000000000000035 RCX: 000000000000067f
[  256.393012] RDX: 0000000000000775 RSI: 0000000000000000 RDI: ffff8881deb3ac80
[  256.400256] RBP: 000000000000003c R08: ffff889847982710 R09: 0000000000010000
[  256.407500] R10: ffffffff82c060c0 R11: 0000000000000004 R12: 0000000000000000
[  256.414746] R13: ffff88811165eea0 R14: ffffc9000d255000 R15: ffff888119b37600
[  256.421990] FS:  0000000000000000(0000) GS:ffff8897e0cc0000(0000) knlGS:0000000000000000
[  256.430207] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  256.436036] CR2: 0000000000000018 CR3: 0000000005c0a006 CR4: 00000000007706e0
[  256.443283] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  256.450527] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  256.457770] PKRU: 55555554
[  256.460529] Call Trace:
[  256.463015]  <TASK>
[  256.465157]  ? ice_xmit_zc+0x6e/0x150 [ice]
[  256.469437]  ice_napi_poll+0x46d/0x680 [ice]
[  256.473815]  ? _raw_spin_unlock_irqrestore+0x1b/0x40
[  256.478863]  __napi_poll+0x29/0x160
[  256.482409]  net_rx_action+0x136/0x260
[  256.486222]  __do_softirq+0xe8/0x2e5
[  256.489853]  ? smpboot_thread_fn+0x2c/0x270
[  256.494108]  run_ksoftirqd+0x2a/0x50
[  256.497747]  smpboot_thread_fn+0x1c1/0x270
[  256.501907]  ? __pfx_smpboot_thread_fn+0x10/0x10
[  256.506594]  kthread+0xea/0x120
[  256.509785]  ? __pfx_kthread+0x10/0x10
[  256.513597]  ret_from_fork+0x29/0x50
[  256.517238]  </TASK>

In fact, irqs were not disabled and napi managed to be scheduled and run
while xsk_pool pointer was still valid, but SW ring of xdp_buff pointers
was already freed.

To fix this, call ice_qvec_dis_irq() after ice_vsi_stop_tx_ring(). Also
while at it, remove redundant ice_clean_rx_ring() call - this is handled
in ice_qp_clean_rings().

Fixes: 2d4238f5 ("ice: Add support for AF_XDP")
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Reviewed-by: Larysa Zaremba <larysa.zaremba@intel.com>
Tested-by: Chandan Kumar Rout <chandanx.rout@intel.com> (A Contingent Worker at Intel)
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>