As Jacob noticed, the optimization introduced in 387da6bc ("can:
c_can: cache frames to operate as a true FIFO") doesn't properly work
on C_CAN, but on D_CAN IP cores. The exact reasons are still unknown.

For now disable caching if CAN frames in the TX path for C_CAN cores.

Fixes: 387da6bc ("can: c_can: cache frames to operate as a true FIFO")
Link: https://lore.kernel.org/all/20220928083354.1062321-1-mkl@pengutronix.de
Link: https://lore.kernel.org/all/15a8084b-9617-2da1-6704-d7e39d60643b@gmail.comReported-by: Jacob Kroon <jacob.kroon@gmail.com>
Tested-by: Jacob Kroon <jacob.kroon@gmail.com>
Cc: stable@vger.kernel.org # v5.15
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Johannes Berg says:

====================
A few late-comer fixes:
 * locking in mac80211 MLME
 * non-QoS driver crash/regression
 * minstrel memory corruption
 * TX deadlock
 * TX queues not always enabled
 * HE/EHT bitrate calculation

* tag 'wireless-2022-09-27' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless:
  wifi: mac80211: mlme: Fix double unlock on assoc success handling
  wifi: mac80211: mlme: Fix missing unlock on beacon RX
  wifi: mac80211: fix memory corruption in minstrel_ht_update_rates()
  wifi: mac80211: fix regression with non-QoS drivers
  wifi: mac80211: ensure vif queues are operational after start
  wifi: mac80211: don't start TX with fq->lock to fix deadlock
  wifi: cfg80211: fix MCS divisor value
====================

Link: https://lore.kernel.org/r/20220927135923.45312-1-johannes@sipsolutions.netSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Add support for Dell 5811e (EM7455) with USB-id 0x413c:0x81c2.
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Cc: stable@vger.kernel.org
Acked-by: Bjørn Mork <bjorn@mork.no>
Link: https://lore.kernel.org/r/20220926150740.6684-3-linux@fw-web.deSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The socket 2 bind the addr in use, bind should fail with EADDRINUSE. So
if bind success or errno != EADDRINUSE, testcase should be failed.

Fixes: 3ca8e402 ("soreuseport: BPF selection functional test")
Signed-off-by: Wang Yufen <wangyufen@huawei.com>
Link: https://lore.kernel.org/r/1663916557-10730-1-git-send-email-wangyufen@huawei.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

Commit 744d23c7 ("net: phy: Warn about incorrect mdio_bus_phy_resume()
state") introduced a WARN() on resume from system sleep if a PHY is not
in PHY_HALTED state.

Commit 6dbe852c ("net: phy: Don't WARN for PHY_READY state in
mdio_bus_phy_resume()") added an exemption for PHY_READY state from
the WARN().

It turns out PHY_UP state needs to be exempted as well because the
following may happen on suspend:

  mdio_bus_phy_suspend()
    phy_stop_machine()
      phydev->state = PHY_UP  #  if (phydev->state >= PHY_UP)

Fixes: 744d23c7 ("net: phy: Warn about incorrect mdio_bus_phy_resume() state")
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/netdev/2b1a1588-505e-dff3-301d-bfc1fb14d685@samsung.com/Signed-off-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: Xiaolei Wang <xiaolei.wang@windriver.com>
Link: https://lore.kernel.org/r/8128fdb51eeebc9efbf3776a4097363a1317aaf1.1663905575.git.lukas@wunner.deSigned-off-by: Paolo Abeni <pabeni@redhat.com>

This commit fixes DMA engine reset timeout issue in suspend/resume
with ADLink I-Pi SMARC Plus board which dmesg shows:
...
[   54.678271] PM: suspend exit
[   54.754066] intel-eth-pci 0000:00:1d.2 enp0s29f2: PHY [stmmac-3:01] driver [Maxlinear Ethernet GPY215B] (irq=POLL)
[   54.755808] intel-eth-pci 0000:00:1d.2 enp0s29f2: Register MEM_TYPE_PAGE_POOL RxQ-0
...
[   54.780482] intel-eth-pci 0000:00:1d.2 enp0s29f2: Register MEM_TYPE_PAGE_POOL RxQ-7
[   55.784098] intel-eth-pci 0000:00:1d.2: Failed to reset the dma
[   55.784111] intel-eth-pci 0000:00:1d.2 enp0s29f2: stmmac_hw_setup: DMA engine initialization failed
[   55.784115] intel-eth-pci 0000:00:1d.2 enp0s29f2: stmmac_open: Hw setup failed
...

The issue is related with serdes which impacts clock.  There is
serdes in ADLink I-Pi SMARC board ethernet controller. Please refer to
commit b9663b7c ("net: stmmac: Enable SERDES power up/down sequence")
for detial. When issue is reproduced, DMA engine clock is not ready
because serdes is not powered up.

To reproduce DMA engine reset timeout issue with hardware which has
serdes in GBE controller, install Ubuntu. In Ubuntu GUI, click
"Power Off/Log Out" -> "Suspend" menu, it disables network interface,
then goes to sleep mode. When it wakes up, it enables network
interface again. Stmmac driver is called in this way:

1. stmmac_release: Stop network interface. In this function, it
   disables DMA engine and network interface;
2. stmmac_suspend: It is called in kernel suspend flow. But because
   network interface has been disabled(netif_running(ndev) is
   false), it does nothing and returns directly;
3. System goes into S3 or S0ix state. Some time later, system is
   waken up by keyboard or mouse;
4. stmmac_resume: It does nothing because network interface has
   been disabled;
5. stmmac_open: It is called to enable network interace again. DMA
   engine is initialized in this API, but serdes is not power on so
   there will be DMA engine reset timeout issue.

Similarly, serdes powerdown should be added in stmmac_release.
Network interface might be disabled by cmd "ifconfig eth0 down",
DMA engine, phy and mac have been disabled in ndo_stop callback,
serdes should be powered down as well. It doesn't make sense that
serdes is on while other components have been turned off.

If ethernet interface is in enabled state(netif_running(ndev) is true)
before suspend/resume, the issue couldn't be reproduced  because serdes
could be powered up in stmmac_resume.

Because serdes_powerup is added in stmmac_open, it doesn't need to be
called in probe function.

Fixes: b9663b7c ("net: stmmac: Enable SERDES power up/down sequence")
Signed-off-by: Junxiao Chang <junxiao.chang@intel.com>
Reviewed-by: Voon Weifeng <weifeng.voon@intel.com>
Tested-by: Jimmy JS Chen <jimmyjs.chen@adlinktech.com>
Tested-by: Looi, Hong Aun <hong.aun.looi@intel.com>
Link: https://lore.kernel.org/r/20220923050448.1220250-1-junxiao.chang@intel.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

Commit 6911458d ("wifi: mac80211: mlme: refactor assoc success
handling") moved the per-link setup out of ieee80211_assoc_success() into a
new function ieee80211_assoc_config_link() but missed to remove the unlock
of 'sta_mtx' in case of HE capability/operation missing on HE AP, which
leads to a double unlock:

ieee80211_assoc_success() {
    ...
    ieee80211_assoc_config_link() {
        ...
        if (!(link->u.mgd.conn_flags & IEEE80211_CONN_DISABLE_HE) &&
            (!elems->he_cap || !elems->he_operation)) {
            mutex_unlock(&sdata->local->sta_mtx);
            ...
        }
        ...
    }
    ...
    mutex_unlock(&sdata->local->sta_mtx);
    ...
}

Fixes: 6911458d ("wifi: mac80211: mlme: refactor assoc success handling")
Signed-off-by: Rafael Mendonca <rafaelmendsr@gmail.com>
Link: https://lore.kernel.org/r/20220925143420.784975-1-rafaelmendsr@gmail.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

Commit 98b0b467 ("wifi: mac80211: mlme: use correct link_sta")
switched to link station instead of deflink and added some checks to do
that, which are done with the 'sta_mtx' mutex held. However, the error
path of these checks does not unlock 'sta_mtx' before returning.

Fixes: 98b0b467 ("wifi: mac80211: mlme: use correct link_sta")
Signed-off-by: Rafael Mendonca <rafaelmendsr@gmail.com>
Link: https://lore.kernel.org/r/20220924184042.778676-1-rafaelmendsr@gmail.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

During our testing of WFM200 module over SDIO on i.MX6Q-based platform,
we discovered a memory corruption on the system, tracing back to the wfx
driver. Using kfence, it was possible to trace it back to the root
cause, which is hw->max_rates set to 8 in wfx_init_common,
while the maximum defined by IEEE80211_TX_TABLE_SIZE is 4.

This causes array out-of-bounds writes during updates of the rate table,
as seen below:

BUG: KFENCE: memory corruption in kfree_rcu_work+0x320/0x36c

Corrupted memory at 0xe0a4ffe0 [ 0x03 0x03 0x03 0x03 0x01 0x00 0x00
0x02 0x02 0x02 0x09 0x00 0x21 0xbb 0xbb 0xbb ] (in kfence-#81):
kfree_rcu_work+0x320/0x36c
process_one_work+0x3ec/0x920
worker_thread+0x60/0x7a4
kthread+0x174/0x1b4
ret_from_fork+0x14/0x2c
0x0

kfence-#81: 0xe0a4ffc0-0xe0a4ffdf, size=32, cache=kmalloc-64

allocated by task 297 on cpu 0 at 631.039555s:
minstrel_ht_update_rates+0x38/0x2b0 [mac80211]
rate_control_tx_status+0xb4/0x148 [mac80211]
ieee80211_tx_status_ext+0x364/0x1030 [mac80211]
ieee80211_tx_status+0xe0/0x118 [mac80211]
ieee80211_tasklet_handler+0xb0/0xe0 [mac80211]
tasklet_action_common.constprop.0+0x11c/0x148
__do_softirq+0x1a4/0x61c
irq_exit+0xcc/0x104
call_with_stack+0x18/0x20
__irq_svc+0x80/0xb0
wq_worker_sleeping+0x10/0x100
wq_worker_sleeping+0x10/0x100
schedule+0x50/0xe0
schedule_timeout+0x2e0/0x474
wait_for_completion+0xdc/0x1ec
mmc_wait_for_req_done+0xc4/0xf8
mmc_io_rw_extended+0x3b4/0x4ec
sdio_io_rw_ext_helper+0x290/0x384
sdio_memcpy_toio+0x30/0x38
wfx_sdio_copy_to_io+0x88/0x108 [wfx]
wfx_data_write+0x88/0x1f0 [wfx]
bh_work+0x1c8/0xcc0 [wfx]
process_one_work+0x3ec/0x920
worker_thread+0x60/0x7a4
kthread+0x174/0x1b4
ret_from_fork+0x14/0x2c 0x0

After discussion on the wireless mailing list it was clarified
that the issue has been introduced by:
commit ee0e16ab ("mac80211: minstrel_ht: fill all requested rates")
and fix shall be in minstrel_ht_update_rates in rc80211_minstrel_ht.c.

Fixes: ee0e16ab ("mac80211: minstrel_ht: fill all requested rates")
Link: https://lore.kernel.org/all/12e5adcd-8aed-f0f7-70cc-4fb7b656b829@camlingroup.com/
Link: https://lore.kernel.org/linux-wireless/20220915131445.30600-1-lech.perczak@camlingroup.com/
Cc: Jérôme Pouiller <jerome.pouiller@silabs.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Peter Seiderer <ps.report@gmx.net>
Cc: Kalle Valo <kvalo@kernel.org>
Cc: Krzysztof Drobiński <krzysztof.drobinski@camlingroup.com>,
Signed-off-by: Paweł Lenkow <pawel.lenkow@camlingroup.com>
Signed-off-by: Lech Perczak <lech.perczak@camlingroup.com>
Reviewed-by: Peter Seiderer <ps.report@gmx.net>
Reviewed-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Acked-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Commit 10cb8e61 ("mac80211: enable QoS support for nl80211 ctrl port")
changed ieee80211_tx_control_port() to aways call
__ieee80211_select_queue() without checking local->hw.queues.

__ieee80211_select_queue() returns a queue-id between 0 and 3, which means
that now ieee80211_tx_control_port() may end up setting the queue-mapping
for a skb to a value higher then local->hw.queues if local->hw.queues
is less then 4.

Specifically this is a problem for ralink rt2500-pci cards where
local->hw.queues is 2. There this causes rt2x00queue_get_tx_queue() to
return NULL and the following error to be logged: "ieee80211 phy0:
rt2x00mac_tx: Error - Attempt to send packet over invalid queue 2",
after which association with the AP fails.

Other callers of __ieee80211_select_queue() skip calling it when
local->hw.queues < IEEE80211_NUM_ACS, add the same check to
ieee80211_tx_control_port(). This fixes ralink rt2500-pci and
similar cards when less then 4 tx-queues no longer working.

Fixes: 10cb8e61 ("mac80211: enable QoS support for nl80211 ctrl port")
Cc: Markus Theil <markus.theil@tu-ilmenau.de>
Suggested-by: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220918192052.443529-1-hdegoede@redhat.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

Make sure local->queue_stop_reasons and vif.txqs_stopped stay in sync.

When a new vif is created the queues may end up in an inconsistent state
and be inoperable:
Communication not using iTXQ will work, allowing to e.g. complete the
association. But the 4-way handshake will time out. The sta will not
send out any skbs queued in iTXQs.

All normal attempts to start the queues will fail when reaching this
state.
local->queue_stop_reasons will have marked all queues as operational but
vif.txqs_stopped will still be set, creating an inconsistent internal
state.

In reality this seems to be race between the mac80211 function
ieee80211_do_open() setting SDATA_STATE_RUNNING and the wake_txqs_tasklet:
Depending on the driver and the timing the queues may end up to be
operational or not.

Cc: stable@vger.kernel.org
Fixes: f856373e ("wifi: mac80211: do not wake queues on a vif that is being stopped")
Signed-off-by: Alexander Wetzel <alexander@wetzel-home.de>
Acked-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20220915130946.302803-1-alexander@wetzel-home.deSigned-off-by: Johannes Berg <johannes.berg@intel.com>

ieee80211_txq_purge() calls fq_tin_reset() and
ieee80211_purge_tx_queue(); Both are then calling
ieee80211_free_txskb(). Which can decide to TX the skb again.

There are at least two ways to get a deadlock:

1) When we have a TDLS teardown packet queued in either tin or frags
   ieee80211_tdls_td_tx_handle() will call ieee80211_subif_start_xmit()
   while we still hold fq->lock. ieee80211_txq_enqueue() will thus
   deadlock.

2) A variant of the above happens if aggregation is up and running:
   In that case ieee80211_iface_work() will deadlock with the original
   task: The original tasks already holds fq->lock and tries to get
   sta->lock after kicking off ieee80211_iface_work(). But the worker
   can get sta->lock prior to the original task and will then spin for
   fq->lock.

Avoid these deadlocks by not sending out any skbs when called via
ieee80211_free_txskb().
Signed-off-by: Alexander Wetzel <alexander@wetzel-home.de>
Link: https://lore.kernel.org/r/20220915124120.301918-1-alexander@wetzel-home.deSigned-off-by: Johannes Berg <johannes.berg@intel.com>

The Bitrate for HE/EHT MCS6 is calculated wrongly due to the
incorrect MCS divisor value for mcs6. Fix it with the proper
value.

previous mcs_divisor value = (11769/6144) = 1.915527

fixed mcs_divisor value = (11377/6144) = 1.851725

Fixes: 9c97c88d ("cfg80211: Add support to calculate and report 4096-QAM HE rates")
Signed-off-by: Tamizh Chelvam Raja <quic_tamizhr@quicinc.com>
Link: https://lore.kernel.org/r/20220908181034.9936-1-quic_tamizhr@quicinc.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

Add missing pci_disable_device() if rr_init_one() fails
Signed-off-by: ruanjinjie <ruanjinjie@huawei.com>
Link: https://lore.kernel.org/r/20220923094320.3109154-1-ruanjinjie@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The devm_ioremap() function returns NULL on error, it doesn't return
error pointers.

Fixes: 3a1a274e ("mlxbf_gige: compute MDIO period based on i1clk")
Signed-off-by: Peng Wu <wupeng58@huawei.com>
Link: https://lore.kernel.org/r/20220923023640.116057-1-wupeng58@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The label passed to the QDESC_GET for the ETHOFLD TXQ, RXQ, and FLQ, is the
'out' one, which skips the 'out_unlock' label, and thus doesn't unlock the
'uld_mutex' before returning. Additionally, since commit 5148e595
("cxgb4: add EOTID tracking and software context dump"), the access to
these ETHOFLD hardware queues should be protected by the 'mqprio_mutex'
instead.

Fixes: 2d0cb84d ("cxgb4: add ETHOFLD hardware queue support")
Fixes: 5148e595 ("cxgb4: add EOTID tracking and software context dump")
Signed-off-by: Rafael Mendonca <rafaelmendsr@gmail.com>
Reviewed-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Link: https://lore.kernel.org/r/20220922175109.764898-1-rafaelmendsr@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

nf_ct_put need to be called to put the refcount got by tcf_ct_fill_params
to avoid possible refcount leak when tcf_ct_flow_table_get fails.

Fixes: c34b961a ("net/sched: act_ct: Create nf flow table per zone")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Link: https://lore.kernel.org/r/20220923020046.8021-1-hbh25y@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Currently usbnet_disconnect() unanchors and frees all deferred URBs
using usb_scuttle_anchored_urbs(), which does not free urb->context,
causing a memory leak as reported by syzbot.

Use a usb_get_from_anchor() while loop instead, similar to what we did
in commit 19cfe912 ("Bluetooth: btusb: Fix memory leak in
play_deferred").  Also free urb->sg.

Reported-and-tested-by: syzbot+dcd3e13cf4472f2e0ba1@syzkaller.appspotmail.com
Fixes: 69ee472f ("usbnet & cdc-ether: Autosuspend for online devices")
Fixes: 638c5115 ("USBNET: support DMA SG")
Signed-off-by: Peilin Ye <peilin.ye@bytedance.com>
Link: https://lore.kernel.org/r/20220923042551.2745-1-yepeilin.cs@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

This reverts commit fe2c9c61.

On Tue, Sep 13, 2022 at 05:48:58PM +0100, Russell King (Oracle) wrote:
>What happens if this is built as a module, and the module is loaded,
>binds (and creates the directory), then is removed, and then re-
>inserted?  Nothing removes the old directory, so doesn't
>debugfs_create_dir() fail, resulting in subsequent failure to add
>any subsequent debugfs entries?
>
>I don't think this patch should be backported to stable trees until
>this point is addressed.

Revert until a proper fix is available as the original behavior was
better.

Cc: Marcin Wojtas <mw@semihalf.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: stable@kernel.org
Reported-by: Russell King <linux@armlinux.org.uk>
Fixes: fe2c9c61 ("net: mvpp2: debugfs: fix memory leak when using debugfs_lookup()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220923234736.657413-1-sashal@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

A previous patch added a wrapper function to take a lock around
 efx_mcdi_filter_table_remove(), but only changed EF10 VFs' method table
 to call it.  Change it in the PF method table too.

Fixes: 77eb4074 ("sfc: move table locking into filter_table_{probe,remove} methods")
Signed-off-by: Andy Moreton <andy.moreton@amd.com>
Signed-off-by: Edward Cree <ecree.xilinx@gmail.com>
Link: https://lore.kernel.org/r/20220922211218.814-1-ecree@xilinx.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Alexander Couzens says:

====================
net: mt7531: pll & reset fixes
====================

Link: https://lore.kernel.org/r/20220917000734.520253-1-lynxis@fe80.euSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The datasheet [1] explicit describes it as requirement for a reset.

[1] MT7531 Reference Manual for Development Board rev 1.0, page 735
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Move the PLL init of the switch out of the pad configuration of the port
6 (usally cpu port).

Fix a unidirectional 100 mbit limitation on 1 gbit or 2.5 gbit links for
outbound traffic on port 5 or port 6.

Fixes: c288575f ("net: dsa: mt7530: Add the support of MT7531 switch")
Cc: stable@vger.kernel.org
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Commit bbb774d9 ("net: Add tests for bonding and team address list
management") adds the net team driver tests in the directory:

  tools/testing/selftests/drivers/net/team/

The file entry in MAINTAINERS for the TEAM DRIVER however refers to:

  tools/testing/selftests/net/team/

Hence, ./scripts/get_maintainer.pl --self-test=patterns complains about a
broken file pattern.

Repair this file entry in TEAM DRIVER.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-by: Benjamin Poirier <bpoirier@nvidia.com>
Link: https://lore.kernel.org/r/20220922114053.10883-1-lukas.bulwahn@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

When GEM is in SGMII mode and disabled as a wakeup source, the power
management controller can power down the entire full power domain(FPD)
if none of the FPD devices are in use.

Incase of FPD off, there are below ethernet link up issues on non-wakeup
suspend/resume. To fix it add phy_exit() in suspend and phy_init() in the
resume path which reinitializes PS GTR SGMII lanes.

$ echo +20 > /sys/class/rtc/rtc0/wakealarm
$ echo mem > /sys/power/state

After resume:

$ ifconfig eth0 up
xilinx-psgtr fd400000.phy: lane 0 (type 10, protocol 5): PLL lock timeout
phy phy-fd400000.phy.0: phy poweron failed --> -110
xilinx-psgtr fd400000.phy: lane 0 (type 10, protocol 5): PLL lock timeout
SIOCSIFFLAGS: Connection timed out
phy phy-fd400000.phy.0: phy poweron failed --> -110

Fixes: 8b73fa3a ("net: macb: Added ZynqMP-specific initialization")
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This change adds support for not enabling carrier during TUNSETIFF
interface creation by specifying the IFF_NO_CARRIER flag.

Our tests make heavy use of tun interfaces. In some scenarios, the test
process creates the interface but another process brings it up after the
interface is discovered via netlink notification. In that case, it is
not possible to create a tun/tap interface with carrier off without it
racing against the bring up. Immediately setting carrier off via
TUNSETCARRIER is still too late.
Signed-off-by: Patrick Rohr <prohr@google.com>
Cc: Maciej Żenczykowski <maze@google.com>
Cc: Lorenzo Colitti <lorenzo@google.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Reviewed-by: Maciej Żenczykowski <maze@google.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Pull networking fixes from Jakub Kicinski:
 "Including fixes from wifi, netfilter and can.

  A handful of awaited fixes here - revert of the FEC changes, bluetooth
  fix, fixes for iwlwifi spew.

  We added a warning in PHY/MDIO code which is triggering on a couple of
  platforms in a false-positive-ish way. If we can't iron that out over
  the week we'll drop it and re-add for 6.1.

  I've added a new "follow up fixes" section for fixes to fixes in
  6.0-rcs but it may actually give the false impression that those are
  problematic or that more testing time would have caught them. So
  likely a one time thing.

  Follow up fixes:

   - nf_tables_addchain: fix nft_counters_enabled underflow

   - ebtables: fix memory leak when blob is malformed

   - nf_ct_ftp: fix deadlock when nat rewrite is needed

  Current release - regressions:

   - Revert "fec: Restart PPS after link state change" and the related
     "net: fec: Use a spinlock to guard `fep->ptp_clk_on`"

   - Bluetooth: fix HCIGETDEVINFO regression

   - wifi: mt76: fix 5 GHz connection regression on mt76x0/mt76x2

   - mptcp: fix fwd memory accounting on coalesce

   - rwlock removal fall out:
      - ipmr: always call ip{,6}_mr_forward() from RCU read-side
        critical section
      - ipv6: fix crash when IPv6 is administratively disabled

   - tcp: read multiple skbs in tcp_read_skb()

   - mdio_bus_phy_resume state warning fallout:
      - eth: ravb: fix PHY state warning splat during system resume
      - eth: sh_eth: fix PHY state warning splat during system resume

  Current release - new code bugs:

   - wifi: iwlwifi: don't spam logs with NSS>2 messages

   - eth: mtk_eth_soc: enable XDP support just for MT7986 SoC

  Previous releases - regressions:

   - bonding: fix NULL deref in bond_rr_gen_slave_id

   - wifi: iwlwifi: mark IWLMEI as broken

  Previous releases - always broken:

   - nf_conntrack helpers:
      - irc: tighten matching on DCC message
      - sip: fix ct_sip_walk_headers
      - osf: fix possible bogus match in nf_osf_find()

   - ipvlan: fix out-of-bound bugs caused by unset skb->mac_header

   - core: fix flow symmetric hash

   - bonding, team: unsync device addresses on ndo_stop

   - phy: micrel: fix shared interrupt on LAN8814"

* tag 'net-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (83 commits)
  selftests: forwarding: add shebang for sch_red.sh
  bnxt: prevent skb UAF after handing over to PTP worker
  net: marvell: Fix refcounting bugs in prestera_port_sfp_bind()
  net: sched: fix possible refcount leak in tc_new_tfilter()
  net: sunhme: Fix packet reception for len < RX_COPY_THRESHOLD
  udp: Use WARN_ON_ONCE() in udp_read_skb()
  selftests: bonding: cause oops in bond_rr_gen_slave_id
  bonding: fix NULL deref in bond_rr_gen_slave_id
  net: phy: micrel: fix shared interrupt on LAN8814
  net/smc: Stop the CLC flow if no link to map buffers on
  ice: Fix ice_xdp_xmit() when XDP TX queue number is not sufficient
  net: atlantic: fix potential memory leak in aq_ndev_close()
  can: gs_usb: gs_usb_set_phys_id(): return with error if identify is not supported
  can: gs_usb: gs_can_open(): fix race dev->can.state condition
  can: flexcan: flexcan_mailbox_read() fix return value for drop = true
  net: sh_eth: Fix PHY state warning splat during system resume
  net: ravb: Fix PHY state warning splat during system resume
  netfilter: nf_ct_ftp: fix deadlock when nat rewrite is needed
  netfilter: ebtables: fix memory leak when blob is malformed
  netfilter: nf_tables: fix percpu memory leak at nf_tables_addchain()
  ...

Pull EFI fixes from Ard Biesheuvel:

 - Use the right variable to check for shim insecure mode

 - Wipe setup_data field when booting via EFI

 - Add missing error check to efibc driver

* tag 'efi-urgent-for-v6.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
  efi: libstub: check Shim mode using MokSBStateRT
  efi: x86: Wipe setup_data on pure EFI boot
  efi: efibc: Guard against allocation failure

Pull gpio fixes from Bartosz Golaszewski:

 - fix a NULL-pointer dereference at driver unbind and a potential
   resource leak in error path in gpio-mockup

 - make the irqchip immutable in gpio-ftgpio010

 - fix dereferencing a potentially uninitialized variable in gpio-tqmx86

 - fix interrupt registering in gpiolib's character device code

* tag 'gpio-fixes-for-v6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpiolib: cdev: Set lineevent_state::irq after IRQ register successfully
  gpio: tqmx86: fix uninitialized variable girq
  gpio: ftgpio010: Make irqchip immutable
  gpio: mockup: Fix potential resource leakage when register a chip
  gpio: mockup: fix NULL pointer dereference when removing debugfs

Merge tag 'perf-tools-fixes-for-v6.0-2022-09-21' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

Pull perf tools fixes from Arnaldo Carvalho de Melo:

 - Fix polling of system-wide events related to mixing per-cpu and
   per-thread events.

 - Do not check if /proc/modules is unchanged when copying /proc/kcore,
   that doesn't get in the way of post processing analysis.

 - Include program header in ELF files generated for JIT files, so that
   they can be opened by tools using elfutils libraries.

 - Enter namespaces when synthesizing build-ids.

 - Fix some bugs related to a recent cpu_map overhaul where we should be
   using an index and not the cpu number.

 - Fix BPF program ELF section name, using the naming expected by libbpf
   when using BPF counters in 'perf stat'.

 - Add a new test for perf stat cgroup BPF counter.

 - Adjust check on 'perf test wp' for older kernels, where the
   PERF_EVENT_IOC_MODIFY_ATTRIBUTES ioctl isn't supported.

 - Sync x86 cpufeatures with the kernel sources, no changes in tooling.

* tag 'perf-tools-fixes-for-v6.0-2022-09-21' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
  perf tools: Honor namespace when synthesizing build-ids
  tools headers cpufeatures: Sync with the kernel sources
  perf kcore_copy: Do not check /proc/modules is unchanged
  libperf evlist: Fix polling of system-wide events
  perf record: Fix cpu mask bit setting for mixed mmaps
  perf test: Skip wp modify test on old kernels
  perf jit: Include program header in ELF files
  perf test: Add a new test for perf stat cgroup BPF counter
  perf stat: Use evsel->core.cpus to iterate cpus in BPF cgroup counters
  perf stat: Fix cpu map index in bperf cgroup code
  perf stat: Fix BPF program section name

RHEL/Fedora RPM build checks are stricter, and complain when executable
files don't have a shebang line, e.g.

*** WARNING: ./kselftests/net/forwarding/sch_red.sh is executable but has no shebang, removing executable bit

Fix it by adding shebang line.

Fixes: 6cf0291f ("selftests: forwarding: Add a RED test for SW datapath")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Link: https://lore.kernel.org/r/20220922024453.437757-1-liuhangbin@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

When reading the timestamp is required bnxt_tx_int() hands
over the ownership of the completed skb to the PTP worker.
The skb should not be used afterwards, as the worker may
run before the rest of our code and free the skb, leading
to a use-after-free.

Since dev_kfree_skb_any() accepts NULL make the loss of
ownership more obvious and set skb to NULL.

Fixes: 83bb623c ("bnxt_en: Transmit and retrieve packet timestamps")
Reviewed-by: Andy Gospodarek <gospo@broadcom.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20220921201005.335390-1-kuba@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

In prestera_port_sfp_bind(), there are two refcounting bugs:
(1) we should call of_node_get() before of_find_node_by_name() as
it will automaitcally decrease the refcount of 'from' argument;
(2) we should call of_node_put() for the break of the iteration
for_each_child_of_node() as it will automatically increase and
decrease the 'child'.

Fixes: 52323ef7 ("net: marvell: prestera: add phylink support")
Signed-off-by: Liang He <windhl@126.com>
Reviewed-by: Yevhen Orlov <yevhen.orlov@plvision.eu>
Link: https://lore.kernel.org/r/20220921133245.4111672-1-windhl@126.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

tfilter_put need to be called to put the refount got by tp->ops->get to
avoid possible refcount leak when chain->tmplt_ops != NULL and
chain->tmplt_ops != tp->ops.

Fixes: 7d5509fa ("net: sched: extend proto ops with 'put' callback")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Reviewed-by: Vlad Buslov <vladbu@nvidia.com>
Link: https://lore.kernel.org/r/20220921092734.31700-1-hbh25y@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

There is a separate receive path for small packets (under 256 bytes).
Instead of allocating a new dma-capable skb to be used for the next packet,
this path allocates a skb and copies the data into it (reusing the existing
sbk for the next packet). There are two bytes of junk data at the beginning
of every packet. I believe these are inserted in order to allow aligned DMA
and IP headers. We skip over them using skb_reserve. Before copying over
the data, we must use a barrier to ensure we see the whole packet. The
current code only synchronizes len bytes, starting from the beginning of
the packet, including the junk bytes. However, this leaves off the final
two bytes in the packet. Synchronize the whole packet.

To reproduce this problem, ping a HME with a payload size between 17 and
214

	$ ping -s 17 <hme_address>

which will complain rather loudly about the data mismatch. Small packets
(below 60 bytes on the wire) do not have this issue. I suspect this is
related to the padding added to increase the minimum packet size.

Fixes: 1da177e4 ("Linux-2.6.12-rc2")
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220920235018.1675956-1-seanga2@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Prevent udp_read_skb() from flooding the syslog.
Suggested-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Peilin Ye <peilin.ye@bytedance.com>
Link: https://lore.kernel.org/r/20220921005915.2697-1-yepeilin.cs@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Jonathan Toppins says:

====================
bonding: fix NULL deref in bond_rr_gen_slave_id

Fix a NULL dereference of the struct bonding.rr_tx_counter member because
if a bond is initially created with an initial mode != zero (Round Robin)
the memory required for the counter is never created and when the mode is
changed there is never any attempt to verify the memory is allocated upon
switching modes.
====================

Link: https://lore.kernel.org/r/cover.1663694476.git.jtoppins@redhat.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

This bonding selftest used to cause a kernel oops on aarch64
and should be architectures agnostic.
Signed-off-by: Jonathan Toppins <jtoppins@redhat.com>
Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Fix a NULL dereference of the struct bonding.rr_tx_counter member because
if a bond is initially created with an initial mode != zero (Round Robin)
the memory required for the counter is never created and when the mode is
changed there is never any attempt to verify the memory is allocated upon
switching modes.

This causes the following Oops on an aarch64 machine:
    [  334.686773] Unable to handle kernel paging request at virtual address ffff2c91ac905000
    [  334.694703] Mem abort info:
    [  334.697486]   ESR = 0x0000000096000004
    [  334.701234]   EC = 0x25: DABT (current EL), IL = 32 bits
    [  334.706536]   SET = 0, FnV = 0
    [  334.709579]   EA = 0, S1PTW = 0
    [  334.712719]   FSC = 0x04: level 0 translation fault
    [  334.717586] Data abort info:
    [  334.720454]   ISV = 0, ISS = 0x00000004
    [  334.724288]   CM = 0, WnR = 0
    [  334.727244] swapper pgtable: 4k pages, 48-bit VAs, pgdp=000008044d662000
    [  334.733944] [ffff2c91ac905000] pgd=0000000000000000, p4d=0000000000000000
    [  334.740734] Internal error: Oops: 96000004 [#1] SMP
    [  334.745602] Modules linked in: bonding tls veth rfkill sunrpc arm_spe_pmu vfat fat acpi_ipmi ipmi_ssif ixgbe igb i40e mdio ipmi_devintf ipmi_msghandler arm_cmn arm_dsu_pmu cppc_cpufreq acpi_tad fuse zram crct10dif_ce ast ghash_ce sbsa_gwdt nvme drm_vram_helper drm_ttm_helper nvme_core ttm xgene_hwmon
    [  334.772217] CPU: 7 PID: 2214 Comm: ping Not tainted 6.0.0-rc4-00133-g64ae13ed #4
    [  334.779950] Hardware name: GIGABYTE R272-P31-00/MP32-AR1-00, BIOS F18v (SCP: 1.08.20211002) 12/01/2021
    [  334.789244] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
    [  334.796196] pc : bond_rr_gen_slave_id+0x40/0x124 [bonding]
    [  334.801691] lr : bond_xmit_roundrobin_slave_get+0x38/0xdc [bonding]
    [  334.807962] sp : ffff8000221733e0
    [  334.811265] x29: ffff8000221733e0 x28: ffffdbac8572d198 x27: ffff80002217357c
    [  334.818392] x26: 000000000000002a x25: ffffdbacb33ee000 x24: ffff07ff980fa000
    [  334.825519] x23: ffffdbacb2e398ba x22: ffff07ff98102000 x21: ffff07ff981029c0
    [  334.832646] x20: 0000000000000001 x19: ffff07ff981029c0 x18: 0000000000000014
    [  334.839773] x17: 0000000000000000 x16: ffffdbacb1004364 x15: 0000aaaabe2f5a62
    [  334.846899] x14: ffff07ff8e55d968 x13: ffff07ff8e55db30 x12: 0000000000000000
    [  334.854026] x11: ffffdbacb21532e8 x10: 0000000000000001 x9 : ffffdbac857178ec
    [  334.861153] x8 : ffff07ff9f6e5a28 x7 : 0000000000000000 x6 : 000000007c2b3742
    [  334.868279] x5 : ffff2c91ac905000 x4 : ffff2c91ac905000 x3 : ffff07ff9f554400
    [  334.875406] x2 : ffff2c91ac905000 x1 : 0000000000000001 x0 : ffff07ff981029c0
    [  334.882532] Call trace:
    [  334.884967]  bond_rr_gen_slave_id+0x40/0x124 [bonding]
    [  334.890109]  bond_xmit_roundrobin_slave_get+0x38/0xdc [bonding]
    [  334.896033]  __bond_start_xmit+0x128/0x3a0 [bonding]
    [  334.901001]  bond_start_xmit+0x54/0xb0 [bonding]
    [  334.905622]  dev_hard_start_xmit+0xb4/0x220
    [  334.909798]  __dev_queue_xmit+0x1a0/0x720
    [  334.913799]  arp_xmit+0x3c/0xbc
    [  334.916932]  arp_send_dst+0x98/0xd0
    [  334.920410]  arp_solicit+0xe8/0x230
    [  334.923888]  neigh_probe+0x60/0xb0
    [  334.927279]  __neigh_event_send+0x3b0/0x470
    [  334.931453]  neigh_resolve_output+0x70/0x90
    [  334.935626]  ip_finish_output2+0x158/0x514
    [  334.939714]  __ip_finish_output+0xac/0x1a4
    [  334.943800]  ip_finish_output+0x40/0xfc
    [  334.947626]  ip_output+0xf8/0x1a4
    [  334.950931]  ip_send_skb+0x5c/0x100
    [  334.954410]  ip_push_pending_frames+0x3c/0x60
    [  334.958758]  raw_sendmsg+0x458/0x6d0
    [  334.962325]  inet_sendmsg+0x50/0x80
    [  334.965805]  sock_sendmsg+0x60/0x6c
    [  334.969286]  __sys_sendto+0xc8/0x134
    [  334.972853]  __arm64_sys_sendto+0x34/0x4c
    [  334.976854]  invoke_syscall+0x78/0x100
    [  334.980594]  el0_svc_common.constprop.0+0x4c/0xf4
    [  334.985287]  do_el0_svc+0x38/0x4c
    [  334.988591]  el0_svc+0x34/0x10c
    [  334.991724]  el0t_64_sync_handler+0x11c/0x150
    [  334.996072]  el0t_64_sync+0x190/0x194
    [  334.999726] Code: b9001062 f9403c02 d53cd044 8b040042 (b8210040)
    [  335.005810] ---[ end trace 0000000000000000 ]---
    [  335.010416] Kernel panic - not syncing: Oops: Fatal exception in interrupt
    [  335.017279] SMP: stopping secondary CPUs
    [  335.021374] Kernel Offset: 0x5baca8eb0000 from 0xffff800008000000
    [  335.027456] PHYS_OFFSET: 0x80000000
    [  335.030932] CPU features: 0x0000,0085c029,19805c82
    [  335.035713] Memory Limit: none
    [  335.038756] Rebooting in 180 seconds..

The fix is to allocate the memory in bond_open() which is guaranteed
to be called before any packets are processed.

Fixes: 848ca918 ("net: bonding: Use per-cpu rr_tx_counter")
CC: Jussi Maki <joamaki@gmail.com>
Signed-off-by: Jonathan Toppins <jtoppins@redhat.com>
Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Since commit ece19502 ("net: phy: micrel: 1588 support for LAN8814
phy") the handler always returns IRQ_HANDLED, except in an error case.
Before that commit, the interrupt status register was checked and if
it was empty, IRQ_NONE was returned. Restore that behavior to play nice
with the interrupt line being shared with others.

Fixes: ece19502 ("net: phy: micrel: 1588 support for LAN8814 phy")
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Divya Koppera <Divya.Koppera@microchip.com>
Link: https://lore.kernel.org/r/20220920141619.808117-1-michael@walle.ccSigned-off-by: Jakub Kicinski <kuba@kernel.org>