Pull s390 fixes from Heiko Carstens:

 - Disable -Warray-bounds warning for gcc12, since the only known way to
   workaround false positive warnings on lowcore accesses would result
   in worse code on fast paths.

 - Avoid lockdep_assert_held() warning in kvm vm memop code.

 - Reduce overhead within gmap_rmap code to get rid of long latencies
   when e.g. shutting down 2nd level guests.

* tag 's390-5.18-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  KVM: s390: vsie/gmap: reduce gmap_rmap overhead
  KVM: s390: Fix lockdep issue in vm memop
  s390: disable -Warray-bounds

Pull MIPS fix from Thomas Bogendoerfer:
 "Extend R4000/R4400 CPU erratum workaround to all revisions"

* tag 'mips-fixes_5.18_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: Fix CP0 counter erratum detection for R4k CPUs

Pull networking fixes from Paolo Abeni:
 "Including fixes from can, rxrpc and wireguard.

  Previous releases - regressions:

   - igmp: respect RCU rules in ip_mc_source() and ip_mc_msfilter()

   - mld: respect RCU rules in ip6_mc_source() and ip6_mc_msfilter()

   - rds: acquire netns refcount on TCP sockets

   - rxrpc: enable IPv6 checksums on transport socket

   - nic: hinic: fix bug of wq out of bound access

   - nic: thunder: don't use pci_irq_vector() in atomic context

   - nic: bnxt_en: fix possible bnxt_open() failure caused by wrong RFS
     flag

   - nic: mlx5e:
      - lag, fix use-after-free in fib event handler
      - fix deadlock in sync reset flow

  Previous releases - always broken:

   - tcp: fix insufficient TCP source port randomness

   - can: grcan: grcan_close(): fix deadlock

   - nfc: reorder destructive operations in to avoid bugs

  Misc:

   - wireguard: improve selftests reliability"

* tag 'net-5.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (63 commits)
  NFC: netlink: fix sleep in atomic bug when firmware download timeout
  selftests: ocelot: tc_flower_chains: specify conform-exceed action for policer
  tcp: drop the hash_32() part from the index calculation
  tcp: increase source port perturb table to 2^16
  tcp: dynamically allocate the perturb table used by source ports
  tcp: add small random increments to the source port
  tcp: resalt the secret every 10 seconds
  tcp: use different parts of the port_offset for index and offset
  secure_seq: use the 64 bits of the siphash for port offset calculation
  wireguard: selftests: set panic_on_warn=1 from cmdline
  wireguard: selftests: bump package deps
  wireguard: selftests: restore support for ccache
  wireguard: selftests: use newer toolchains to fill out architectures
  wireguard: selftests: limit parallelism to $(nproc) tests at once
  wireguard: selftests: make routing loop test non-fatal
  net/mlx5: Fix matching on inner TTC
  net/mlx5: Avoid double clear or set of sync reset requested
  net/mlx5: Fix deadlock in sync reset flow
  net/mlx5e: Fix trust state reset in reload
  net/mlx5e: Avoid checking offload capability in post_parse action
  ...

There are sleep in atomic bug that could cause kernel panic during
firmware download process. The root cause is that nlmsg_new with
GFP_KERNEL parameter is called in fw_dnld_timeout which is a timer
handler. The call trace is shown below:

BUG: sleeping function called from invalid context at include/linux/sched/mm.h:265
Call Trace:
kmem_cache_alloc_node
__alloc_skb
nfc_genl_fw_download_done
call_timer_fn
__run_timers.part.0
run_timer_softirq
__do_softirq
...

The nlmsg_new with GFP_KERNEL parameter may sleep during memory
allocation process, and the timer handler is run as the result of
a "software interrupt" that should not call any other function
that could sleep.

This patch changes allocation mode of netlink message from GFP_KERNEL
to GFP_ATOMIC in order to prevent sleep in atomic bug. The GFP_ATOMIC
flag makes memory allocation operation could be used in atomic context.

Fixes: 9674da87 ("NFC: Add firmware upload netlink command")
Fixes: 9ea7187c ("NFC: netlink: Rename CMD_FW_UPLOAD to CMD_FW_DOWNLOAD")
Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220504055847.38026-1-duoming@zju.edu.cnSigned-off-by: Paolo Abeni <pabeni@redhat.com>

As discussed here with Ido Schimmel:
https://patchwork.kernel.org/project/netdevbpf/patch/20220224102908.5255-2-jianbol@nvidia.com/

the default conform-exceed action is "reclassify", for a reason we don't
really understand.

The point is that hardware can't offload that police action, so not
specifying "conform-exceed" was always wrong, even though the command
used to work in hardware (but not in software) until the kernel started
adding validation for it.

Fix the command used by the selftest by making the policer drop on
exceed, and pass the packet to the next action (goto) on conform.

Fixes: 8cd6b020 ("selftests: ocelot: add some example VCAP IS1, IS2 and ES0 tc offloads")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://lore.kernel.org/r/20220503121428.842906-1-vladimir.oltean@nxp.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Willy Tarreau says:

====================
insufficient TCP source port randomness

In a not-yet published paper, Moshe Kol, Amit Klein, and Yossi Gilad
report being able to accurately identify a client by forcing it to emit
only 40 times more connections than the number of entries in the
table_perturb[] table, which is indexed by hashing the connection tuple.
The current 2^8 setting allows them to perform that attack with only 10k
connections, which is not hard to achieve in a few seconds.

Eric, Amit and I have been working on this for a few weeks now imagining,
testing and eliminating a number of approaches that Amit and his team were
still able to break or that were found to be too risky or too expensive,
and ended up with the simple improvements in this series that resists to
the attack, doesn't degrade the performance, and preserves a reliable port
selection algorithm to avoid connection failures, including the odd/even
port selection preference that allows bind() to always find a port quickly
even under strong connect() stress.

The approach relies on several factors:
  - resalting the hash secret that's used to choose the table_perturb[]
    entry every 10 seconds to eliminate slow attacks and force the
    attacker to forget everything that was learned after this delay.
    This already eliminates most of the problem because if a client
    stays silent for more than 10 seconds there's no link between the
    previous and the next patterns, and 10s isn't yet frequent enough
    to cause too frequent repetition of a same port that may induce a
    connection failure ;

  - adding small random increments to the source port. Previously, a
    random 0 or 1 was added every 16 ports. Now a random 0 to 7 is
    added after each port. This means that with the default 32768-60999
    range, a worst case rollover happens after 1764 connections, and
    an average of 3137. This doesn't stop statistical attacks but
    requires significantly more iterations of the same attack to
    confirm a guess.

  - increasing the table_perturb[] size from 2^8 to 2^16, which Amit
    says will require 2.6 million connections to be attacked with the
    changes above, making it pointless to get a fingerprint that will
    only last 10 seconds. Due to the size, the table was made dynamic.

  - a few minor improvements on the bits used from the hash, to eliminate
    some unfortunate correlations that may possibly have been exploited
    to design future attack models.

These changes were tested under the most extreme conditions, up to
1.1 million connections per second to one and a few targets, showing no
performance regression, and only 2 connection failures within 13 billion,
which is less than 2^-32 and perfectly within usual values.

The series is split into small reviewable changes and was already reviewed
by Amit and Eric.
====================

Link: https://lore.kernel.org/r/20220502084614.24123-1-w@1wt.euSigned-off-by: Jakub Kicinski <kuba@kernel.org>

In commit 190cc824 ("tcp: change source port randomizarion at
connect() time"), the table_perturb[] array was introduced and an
index was taken from the port_offset via hash_32(). But it turns
out that hash_32() performs a multiplication while the input here
comes from the output of SipHash in secure_seq, that is well
distributed enough to avoid the need for yet another hash.
Suggested-by: Amit Klein <aksecurity@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Moshe Kol, Amit Klein, and Yossi Gilad reported being able to accurately
identify a client by forcing it to emit only 40 times more connections
than there are entries in the table_perturb[] table. The previous two
improvements consisting in resalting the secret every 10s and adding
randomness to each port selection only slightly improved the situation,
and the current value of 2^8 was too small as it's not very difficult
to make a client emit 10k connections in less than 10 seconds.

Thus we're increasing the perturb table from 2^8 to 2^16 so that the
same precision now requires 2.6M connections, which is more difficult in
this time frame and harder to hide as a background activity. The impact
is that the table now uses 256 kB instead of 1 kB, which could mostly
affect devices making frequent outgoing connections. However such
components usually target a small set of destinations (load balancers,
database clients, perf assessment tools), and in practice only a few
entries will be visited, like before.

A live test at 1 million connections per second showed no performance
difference from the previous value.
Reported-by: Moshe Kol <moshe.kol@mail.huji.ac.il>
Reported-by: Yossi Gilad <yossi.gilad@mail.huji.ac.il>
Reported-by: Amit Klein <aksecurity@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

We'll need to further increase the size of this table and it's likely
that at some point its size will not be suitable anymore for a static
table. Let's allocate it on boot from inet_hashinfo2_init(), which is
called from tcp_init().

Cc: Moshe Kol <moshe.kol@mail.huji.ac.il>
Cc: Yossi Gilad <yossi.gilad@mail.huji.ac.il>
Cc: Amit Klein <aksecurity@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Here we're randomly adding between 0 and 7 random increments to the
selected source port in order to add some noise in the source port
selection that will make the next port less predictable.

With the default port range of 32768-60999 this means a worst case
reuse scenario of 14116/8=1764 connections between two consecutive
uses of the same port, with an average of 14116/4.5=3137. This code
was stressed at more than 800000 connections per second to a fixed
target with all connections closed by the client using RSTs (worst
condition) and only 2 connections failed among 13 billion, despite
the hash being reseeded every 10 seconds, indicating a perfectly
safe situation.

Cc: Moshe Kol <moshe.kol@mail.huji.ac.il>
Cc: Yossi Gilad <yossi.gilad@mail.huji.ac.il>
Cc: Amit Klein <aksecurity@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In order to limit the ability for an observer to recognize the source
ports sequence used to contact a set of destinations, we should
periodically shuffle the secret. 10 seconds looks effective enough
without causing particular issues.

Cc: Moshe Kol <moshe.kol@mail.huji.ac.il>
Cc: Yossi Gilad <yossi.gilad@mail.huji.ac.il>
Cc: Amit Klein <aksecurity@gmail.com>
Cc: Jason A. Donenfeld <Jason@zx2c4.com>
Tested-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Amit Klein suggests that we use different parts of port_offset for the
table's index and the port offset so that there is no direct relation
between them.

Cc: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Moshe Kol <moshe.kol@mail.huji.ac.il>
Cc: Yossi Gilad <yossi.gilad@mail.huji.ac.il>
Cc: Amit Klein <aksecurity@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

SipHash replaced MD5 in secure_ipv{4,6}_port_ephemeral() via commit
7cd23e53 ("secure_seq: use SipHash in place of MD5"), but the output
remained truncated to 32-bit only. In order to exploit more bits from the
hash, let's make the functions return the full 64-bit of siphash_3u32().
We also make sure the port offset calculation in __inet_hash_connect()
remains done on 32-bit to avoid the need for div_u64_rem() and an extra
cost on 32-bit systems.

Cc: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Moshe Kol <moshe.kol@mail.huji.ac.il>
Cc: Yossi Gilad <yossi.gilad@mail.huji.ac.il>
Cc: Amit Klein <aksecurity@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Jason A. Donenfeld says:

====================
wireguard patches for 5.18-rc6

In working on some other problems, I wound up leaning on the WireGuard
CI more than usual and uncovered a few small issues with reliability.
These are fairly low key changes, since they don't impact kernel code
itself.

One change does stick out in particular, though, which is the "make
routing loop test non-fatal" commit. I'm not thrilled about doing this,
but currently [1] remains unsolved, and I'm still working on a real
solution to that (hopefully for 5.19 or 5.20 if I can come up with a
good idea...), so for now that test just prints a big red warning
instead.

[1] https://lore.kernel.org/netdev/YmszSXueTxYOC41G@zx2c4.com/
====================

Link: https://lore.kernel.org/r/20220504202920.72908-1-Jason@zx2c4.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Rather than setting this once init is running, set panic_on_warn from
the kernel command line, so that it catches splats from WireGuard
initialization code and the various crypto selftests.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Use newer, more reliable package dependencies. These should hopefully
reduce flakes. However, we keep the old iputils package, as it
accumulated bugs after resulting in flakes on slow machines.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

When moving to non-system toolchains, we inadvertantly killed the
ability to use ccache. So instead, build ccache support into the test
harness directly.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Rather than relying on the system to have cross toolchains available,
simply download musl.cc's ones and use that libc.so, and then we use it
to fill in a few missing platforms, such as riscv64, riscv64, powerpc64,
and s390x.

Since riscv doesn't have a second serial port in its device description,
we have to use virtio's vport. This is actually the same situation on
ARM, but we were previously hacking QEMU up to work around this, which
required a custom QEMU. Instead just do the vport trick on ARM too.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The parallel tests were added to catch queueing issues from multiple
cores. But what happens in reality when testing tons of processes is
that these separate threads wind up fighting with the scheduler, and we
wind up with contention in places we don't care about that decrease the
chances of hitting a bug. So just do a test with the number of CPU
cores, rather than trying to scale up arbitrarily.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

I hate to do this, but I still do not have a good solution to actually
fix this bug across architectures. So just disable it for now, so that
the CI can still deliver actionable results. This commit adds a large
red warning, so that at least the failure isn't lost forever, and
hopefully this can be revisited down the line.

Link: https://lore.kernel.org/netdev/CAHmME9pv1x6C4TNdL6648HydD8r+txpV4hTUXOBVkrapBXH4QQ@mail.gmail.com/
Link: https://lore.kernel.org/netdev/YmszSXueTxYOC41G@zx2c4.com/
Link: https://lore.kernel.org/wireguard/CAHmME9rNnBiNvBstb7MPwK-7AmAN0sOfnhdR=eeLrowWcKxaaQ@mail.gmail.com/Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Pull iommu fixes from Joerg Roedel:
 "IOMMU core:

   - Fix for a regression which could cause NULL-ptr dereferences

  Arm SMMU:

   - Fix off-by-one in SMMUv3 SVA TLB invalidation

   - Disable large mappings to workaround nvidia erratum

  Intel VT-d:

   - Handle PCI stop marker messages in IOMMU driver to meet the
     requirement of I/O page fault handling framework.

   - Calculate a feasible mask for non-aligned page-selective IOTLB
     invalidation.

  Apple DART IOMMU:

   - Fix potential NULL-ptr dereference

   - Set module owner"

* tag 'iomm-fixes-v5.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu: Make sysfs robust for non-API groups
  iommu/dart: Add missing module owner to ops structure
  iommu/dart: check return value after calling platform_get_resource()
  iommu/vt-d: Drop stop marker messages
  iommu/vt-d: Calculate mask for non-aligned flushes
  iommu: arm-smmu: disable large page mappings for Nvidia arm-smmu
  iommu/arm-smmu-v3: Fix size calculation in arm_smmu_mm_invalidate_range()

Pull IPMI fixes from Corey Minyard:
 "Fix some issues that were reported.

  This has been in for-next for a bit (longer than the times would
  indicate, I had to rebase to add some text to the headers) and these
  are fixes that need to go in"

* tag 'for-linus-5.17-2' of https://github.com/cminyard/linux-ipmi:
  ipmi:ipmi_ipmb: Fix null-ptr-deref in ipmi_unregister_smi()
  ipmi: When handling send message responses, don't process the message

Groups created by VFIO backends outside the core IOMMU API should never
be passed directly into the API itself, however they still expose their
standard sysfs attributes, so we can still stumble across them that way.
Take care to consider those cases before jumping into our normal
assumptions of a fully-initialised core API group.

Fixes: 3f6634d9 ("iommu: Use right way to retrieve iommu_ops")
Reported-by: Jan Stancek <jstancek@redhat.com>
Tested-by: Jan Stancek <jstancek@redhat.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/86ada41986988511a8424e84746dfe9ba7f87573.1651667683.git.robin.murphy@arm.comSigned-off-by: Joerg Roedel <jroedel@suse.de>

it/saeed/linux

Saeed Mahameed says:

====================
mlx5 fixes 2022-05-03

This series provides bug fixes to mlx5 driver.
Please pull and let me know if there is any problem.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

This is required to make loading this as a module work.
Signed-off-by: Hector Martin <marcan@marcan.st>
Fixes: 46d1fb07 ("iommu/dart: Add DART iommu driver")
Reviewed-by: Sven Peter <sven@svenpeter.dev>
Link: https://lore.kernel.org/r/20220502092238.30486-1-marcan@marcan.stSigned-off-by: Joerg Roedel <jroedel@suse.de>

The cited commits didn't use proper matching on inner TTC
as a result distribution of encapsulated packets wasn't symmetric
between the physical ports.

Fixes: 4c71ce50 ("net/mlx5: Support partial TTC rules")
Fixes: 8e25a2bc ("net/mlx5: Lag, add support to create TTC tables for LAG port selection")
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Double clear of reset requested state can lead to NULL pointer as it
will try to delete the timer twice. This can happen for example on a
race between abort from FW and pci error or reset. Avoid such case using
test_and_clear_bit() to verify only one time reset requested state clear
flow. Similarly use test_and_set_bit() to verify only one time reset
requested state set flow.

Fixes: 7dd6df32 ("net/mlx5: Handle sync reset abort event")
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Maher Sanalla <msanalla@nvidia.com>
Reviewed-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

The sync reset flow can lead to the following deadlock when
poll_sync_reset() is called by timer softirq and waiting on
del_timer_sync() for the same timer. Fix that by moving the part of the
flow that waits for the timer to reset_reload_work.

It fixes the following kernel Trace:
RIP: 0010:del_timer_sync+0x32/0x40
...
Call Trace:
 <IRQ>
 mlx5_sync_reset_clear_reset_requested+0x26/0x50 [mlx5_core]
 poll_sync_reset.cold+0x36/0x52 [mlx5_core]
 call_timer_fn+0x32/0x130
 __run_timers.part.0+0x180/0x280
 ? tick_sched_handle+0x33/0x60
 ? tick_sched_timer+0x3d/0x80
 ? ktime_get+0x3e/0xa0
 run_timer_softirq+0x2a/0x50
 __do_softirq+0xe1/0x2d6
 ? hrtimer_interrupt+0x136/0x220
 irq_exit+0xae/0xb0
 smp_apic_timer_interrupt+0x7b/0x140
 apic_timer_interrupt+0xf/0x20
 </IRQ>

Fixes: 3c5193a8 ("net/mlx5: Use del_timer_sync in fw reset flow of halting poll")
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Maher Sanalla <msanalla@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Setting dscp2prio during the driver reload can cause dcb ieee app list to
be not empty after the reload finish and as a result to a conflict between
the priority trust state reported by the app and the state in the device
register.

Reset the dcb ieee app list on initialization in case this is
conflicting with the register status.

Fixes: 2a5e7a13 ("net/mlx5e: Add dcbnl dscp to priority support")
Signed-off-by: Moshe Tal <moshet@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

During TC action parsing, the can_offload callback is called
before calling the action's main parsing callback.

Later on, the can_offload callback is called again before handling
the action's post_parse callback if exists.

Since the main parsing callback might have changed and set parsing
params for the rule, following can_offload checks might fail because
some parsing params were already set.

Specifically, the ct action main parsing sets the ct param in the
parsing status structure and when the second can_offload for ct action
is called, before handling the ct post parsing, it will return an error
since it checks this ct param to indicate multiple ct actions which are
not supported.

Therefore, the can_offload call is removed from the post parsing
handling to prevent such cases.
This is allowed since the first can_offload call will ensure that the
action can be offloaded and the fact the code reached the post parsing
handling already means that the action can be offloaded.

Fixes: 8300f225 ("net/mlx5e: Create new flow attr for multi table actions")
Signed-off-by: Ariel Levkovich <lariel@nvidia.com>
Reviewed-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

__mlx5_tc_ct_entry_put() queues release of tuple related to some ct FT,
if that is the last reference to that tuple, the actual deletion of
the tuple can happen after the FT is already destroyed and freed.

Flush the used workqueue before destroying the ct FT.

Fixes: a2173131 ("net/mlx5e: CT: manage the lifetime of the ct entry object")
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

When resolving the decap route device for a tunnel decap rule,
the result may be an OVS internal port device.

Prior to adding the support for internal port offload, such case
would result in using the uplink as the default decap route device
which allowed devices that can't support internal port offload
to offload this decap rule.

This behavior got broken by adding the internal port offload which
will fail in case the device can't support internal port offload.

To restore the old behavior, use the uplink device as the decap
route as before when internal port offload is not supported.

Fixes: b16eb3c8 ("net/mlx5: Support internal port as decap route device")
Signed-off-by: Ariel Levkovich <lariel@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

ct_clear action is translated to clearing reg_c metadata
which holds ct state and zone information using mod header
actions.
These actions are allocated during the actions parsing, as
part of the flow attributes main mod header action list.

If ct action exists in the rule, the flow's main mod header
is used only in the post action table rule, after the ct tables
which set the ct info in the reg_c as part of the ct actions.

Therefore, if the original rule has a ct_clear action followed
by a ct action, the ct action reg_c setting will be done first and
will be followed by the ct_clear resetting reg_c and overwriting
the ct info.

Fix this by moving the ct_clear mod header actions allocation from
the ct action parsing stage to the ct action post parsing stage where
it is already known if ct_clear is followed by a ct action.
In such case, we skip the mod header actions allocation for the ct
clear since the ct action will write to reg_c anyway after clearing it.

Fixes: 806401c2 ("net/mlx5e: CT, Fix multiple allocations and memleak of mod acts")
Signed-off-by: Ariel Levkovich <lariel@nvidia.com>
Reviewed-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Referenced change added check to skip updating fib when new fib instance
has same or lower priority. However, new fib instance can be an update on
same dst address as existing one even though the structure is another
instance that has different address. Ignoring events on such instances
causes multipath LAG state to not be correctly updated.

Track 'dst' and 'dst_len' fields of fib event fib_entry_notifier_info
structure and don't skip events that have the same value of that fields.

Fixes: ad11c4f1 ("net/mlx5e: Lag, Only handle events from highest priority multipath entry")
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Referenced change incorrectly sets single path fib_info even when LAG is
not active. Fix it by moving call to mlx5_lag_fib_set() into conditional
that verifies LAG state.

Fixes: ad11c4f1 ("net/mlx5e: Lag, Only handle events from highest priority multipath entry")
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Recent commit that modified fib route event handler to handle events
according to their priority introduced use-after-free[0] in mp->mfi pointer
usage. The pointer now is not just cached in order to be compared to
following fib_info instances, but is also dereferenced to obtain
fib_priority. However, since mlx5 lag code doesn't hold the reference to
fin_info during whole mp->mfi lifetime, it could be used after fib_info
instance has already been freed be kernel infrastructure code.

Don't ever dereference mp->mfi pointer. Refactor it to be 'const void*'
type and cache fib_info priority in dedicated integer. Group
fib_info-related data into dedicated 'fib' structure that will be further
extended by following patches in the series.

[0]:

[  203.588029] ==================================================================
[  203.590161] BUG: KASAN: use-after-free in mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[  203.592386] Read of size 4 at addr ffff888144df2050 by task kworker/u20:4/138

[  203.594766] CPU: 3 PID: 138 Comm: kworker/u20:4 Tainted: G    B             5.17.0-rc7+ #6
[  203.596751] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
[  203.598813] Workqueue: mlx5_lag_mp mlx5_lag_fib_update [mlx5_core]
[  203.600053] Call Trace:
[  203.600608]  <TASK>
[  203.601110]  dump_stack_lvl+0x48/0x5e
[  203.601860]  print_address_description.constprop.0+0x1f/0x160
[  203.602950]  ? mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[  203.604073]  ? mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[  203.605177]  kasan_report.cold+0x83/0xdf
[  203.605969]  ? mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[  203.607102]  mlx5_lag_fib_update+0xabd/0xd60 [mlx5_core]
[  203.608199]  ? mlx5_lag_init_fib_work+0x1c0/0x1c0 [mlx5_core]
[  203.609382]  ? read_word_at_a_time+0xe/0x20
[  203.610463]  ? strscpy+0xa0/0x2a0
[  203.611463]  process_one_work+0x722/0x1270
[  203.612344]  worker_thread+0x540/0x11e0
[  203.613136]  ? rescuer_thread+0xd50/0xd50
[  203.613949]  kthread+0x26e/0x300
[  203.614627]  ? kthread_complete_and_exit+0x20/0x20
[  203.615542]  ret_from_fork+0x1f/0x30
[  203.616273]  </TASK>

[  203.617174] Allocated by task 3746:
[  203.617874]  kasan_save_stack+0x1e/0x40
[  203.618644]  __kasan_kmalloc+0x81/0xa0
[  203.619394]  fib_create_info+0xb41/0x3c50
[  203.620213]  fib_table_insert+0x190/0x1ff0
[  203.621020]  fib_magic.isra.0+0x246/0x2e0
[  203.621803]  fib_add_ifaddr+0x19f/0x670
[  203.622563]  fib_inetaddr_event+0x13f/0x270
[  203.623377]  blocking_notifier_call_chain+0xd4/0x130
[  203.624355]  __inet_insert_ifa+0x641/0xb20
[  203.625185]  inet_rtm_newaddr+0xc3d/0x16a0
[  203.626009]  rtnetlink_rcv_msg+0x309/0x880
[  203.626826]  netlink_rcv_skb+0x11d/0x340
[  203.627626]  netlink_unicast+0x4cc/0x790
[  203.628430]  netlink_sendmsg+0x762/0xc00
[  203.629230]  sock_sendmsg+0xb2/0xe0
[  203.629955]  ____sys_sendmsg+0x58a/0x770
[  203.630756]  ___sys_sendmsg+0xd8/0x160
[  203.631523]  __sys_sendmsg+0xb7/0x140
[  203.632294]  do_syscall_64+0x35/0x80
[  203.633045]  entry_SYSCALL_64_after_hwframe+0x44/0xae

[  203.634427] Freed by task 0:
[  203.635063]  kasan_save_stack+0x1e/0x40
[  203.635844]  kasan_set_track+0x21/0x30
[  203.636618]  kasan_set_free_info+0x20/0x30
[  203.637450]  __kasan_slab_free+0xfc/0x140
[  203.638271]  kfree+0x94/0x3b0
[  203.638903]  rcu_core+0x5e4/0x1990
[  203.639640]  __do_softirq+0x1ba/0x5d3

[  203.640828] Last potentially related work creation:
[  203.641785]  kasan_save_stack+0x1e/0x40
[  203.642571]  __kasan_record_aux_stack+0x9f/0xb0
[  203.643478]  call_rcu+0x88/0x9c0
[  203.644178]  fib_release_info+0x539/0x750
[  203.644997]  fib_table_delete+0x659/0xb80
[  203.645809]  fib_magic.isra.0+0x1a3/0x2e0
[  203.646617]  fib_del_ifaddr+0x93f/0x1300
[  203.647415]  fib_inetaddr_event+0x9f/0x270
[  203.648251]  blocking_notifier_call_chain+0xd4/0x130
[  203.649225]  __inet_del_ifa+0x474/0xc10
[  203.650016]  devinet_ioctl+0x781/0x17f0
[  203.650788]  inet_ioctl+0x1ad/0x290
[  203.651533]  sock_do_ioctl+0xce/0x1c0
[  203.652315]  sock_ioctl+0x27b/0x4f0
[  203.653058]  __x64_sys_ioctl+0x124/0x190
[  203.653850]  do_syscall_64+0x35/0x80
[  203.654608]  entry_SYSCALL_64_after_hwframe+0x44/0xae

[  203.666952] The buggy address belongs to the object at ffff888144df2000
                which belongs to the cache kmalloc-256 of size 256
[  203.669250] The buggy address is located 80 bytes inside of
                256-byte region [ffff888144df2000, ffff888144df2100)
[  203.671332] The buggy address belongs to the page:
[  203.672273] page:00000000bf6c9314 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144df0
[  203.674009] head:00000000bf6c9314 order:2 compound_mapcount:0 compound_pincount:0
[  203.675422] flags: 0x2ffff800010200(slab|head|node=0|zone=2|lastcpupid=0x1ffff)
[  203.676819] raw: 002ffff800010200 0000000000000000 dead000000000122 ffff888100042b40
[  203.678384] raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000
[  203.679928] page dumped because: kasan: bad access detected

[  203.681455] Memory state around the buggy address:
[  203.682421]  ffff888144df1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[  203.683863]  ffff888144df1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[  203.685310] >ffff888144df2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  203.686701]                                                  ^
[  203.687820]  ffff888144df2080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  203.689226]  ffff888144df2100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[  203.690620] ==================================================================

Fixes: ad11c4f1 ("net/mlx5e: Lag, Only handle events from highest priority multipath entry")
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

The arguments of update_buffer_lossy() is in a wrong order. Fix it.

Fixes: 88b3d5c9 ("net/mlx5e: Fix port buffers cell size value")
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Currently, match VLAN rule also matches packets that have multiple VLAN
headers. This behavior is similar to buggy flower classifier behavior that
has recently been fixed. Fix the issue by matching on
outer_second_cvlan_tag with value 0 which will cause the HW to verify the
packet doesn't contain second vlan header.

Fixes: 699e96dd ("net/mlx5e: Support offloading tc double vlan headers match")
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Resource dump menu may span over more than a single page, support it.
Otherwise, menu read may result in a memory access violation: reading
outside of the allocated page.
Note that page format of the first menu page contains menu headers while
the proceeding menu pages contain only records.

The KASAN logs are as follows:
BUG: KASAN: slab-out-of-bounds in strcmp+0x9b/0xb0
Read of size 1 at addr ffff88812b2e1fd0 by task systemd-udevd/496

CPU: 5 PID: 496 Comm: systemd-udevd Tainted: G    B  5.16.0_for_upstream_debug_2022_01_10_23_12 #1
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x57/0x7d
 print_address_description.constprop.0+0x1f/0x140
 ? strcmp+0x9b/0xb0
 ? strcmp+0x9b/0xb0
 kasan_report.cold+0x83/0xdf
 ? strcmp+0x9b/0xb0
 strcmp+0x9b/0xb0
 mlx5_rsc_dump_init+0x4ab/0x780 [mlx5_core]
 ? mlx5_rsc_dump_destroy+0x80/0x80 [mlx5_core]
 ? lockdep_hardirqs_on_prepare+0x286/0x400
 ? raw_spin_unlock_irqrestore+0x47/0x50
 ? aomic_notifier_chain_register+0x32/0x40
 mlx5_load+0x104/0x2e0 [mlx5_core]
 mlx5_init_one+0x41b/0x610 [mlx5_core]
 ....
The buggy address belongs to the object at ffff88812b2e0000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 4048 bytes to the right of
 4096-byte region [ffff88812b2e0000, ffff88812b2e1000)
The buggy address belongs to the page:
page:000000009d69807a refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88812b2e6000 pfn:0x12b2e0
head:000000009d69807a order:3 compound_mapcount:0 compound_pincount:0
flags: 0x8000000000010200(slab|head|zone=2)
raw: 8000000000010200 0000000000000000 dead000000000001 ffff888100043040
raw: ffff88812b2e6000 0000000080040000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88812b2e1e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88812b2e1f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88812b2e1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                 ^
 ffff88812b2e2000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88812b2e2080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Fixes: 12206b17 ("net/mlx5: Add support for resource dump")
Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

When OVS internal port is the vtep device, the first decap
rule is matching on the internal port's vport metadata value
and then changes the metadata to be the uplink's value.

Therefore, following rules on the tunnel, in chain > 0, should
avoid matching on internal port metadata and use the uplink
vport metadata instead.

Select the uplink's metadata value for the source vport match
in case the rule is in chain greater than zero, even if the tunnel
route device is internal port.

Fixes: 166f431e ("net/mlx5e: Add indirect tc offload of ovs internal port")
Signed-off-by: Ariel Levkovich <lariel@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>