An object file cannot be built for both loadable module and built-in
use at the same time:

arm-linux-gnueabi-ld: drivers/net/ethernet/micrel/ks8851_common.o: in function `ks8851_probe_common':
ks8851_common.c:(.text+0xf80): undefined reference to `__this_module'

Change the ks8851_common code to be a standalone module instead,
and use Makefile logic to ensure this is built-in if at least one
of its two users is.

Fixes: 797047f8 ("net: ks8851: Implement Parallel bus operations")
Link: https://lore.kernel.org/netdev/20210125121937.3900988-1-arnd@kernel.org/Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Acked-by: NMarek Vasut <marex@denx.de>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

GPY115 need reset PHY when it comes out from loopback mode if the firmware
version number (lower 8 bits) is equal to or below 0x76.

Fixes: 7d901a1e ("net: phy: add Maxlinear GPY115/21x/24x driver")
Signed-off-by: NXu Liang <lxu@maxlinear.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Merge tag 'mac80211-for-net-2021-09-27' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes berg says:

====================
Some fixes:
 * potential use-after-free in CCMP/GCMP RX processing
 * potential use-after-free in TX A-MSDU processing
 * revert to low data rates for no-ack as the commit
   broke other things
 * limit VHT MCS/NSS in radiotap injection
 * drop frames with invalid addresses in IBSS mode
 * check rhashtable_init() return value in mesh
 * fix potentially unaligned access in mesh
 * fix late beacon hrtimer handling in hwsim (syzbot)
 * fix documentation for PTK0 rekeying
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Andrew Lunn says:

====================
mv88e6xxx: MTU fixes

These three patches fix MTU issues reported by 曹煜.

There are two different ways of configuring the MTU in the hardware.
The 6161 family is using the wrong method. Some of the marvell switch
enforce the MTU when the port is used for CPU/DSA, some don't.
Because of the extra header, the MTU needs increasing with this
overhead.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Same members of the Marvell Ethernet switches impose MTU restrictions
on ports used for connecting to the CPU or another switch for DSA. If
the MTU is set too low, tagged frames will be discarded. Ensure the
worst case tagger overhead is included in setting the MTU for DSA and
CPU ports.

Fixes: 1baf0fac ("net: dsa: mv88e6xxx: Use chip-wide max frame size for MTU")
Reported by: 曹煜 <cao88yu@gmail.com>
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The MTU passed to the DSA driver is the payload size, typically 1500.
However, the switch uses the frame size when applying restrictions.
Adjust the MTU with the size of the Ethernet header and the frame
checksum. The VLAN header also needs to be included when the frame
size it per port, but not when it is global.

Fixes: 1baf0fac ("net: dsa: mv88e6xxx: Use chip-wide max frame size for MTU")
Reported by: 曹煜 <cao88yu@gmail.com>
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The datasheets suggests the 6161 uses a per port setting for jumbo
frames. Testing has however shown this is not correct, it uses the old
style chip wide MTU control. Change the ops in the 6161 structure to
reflect this.

Fixes: 1baf0fac ("net: dsa: mv88e6xxx: Use chip-wide max frame size for MTU")
Reported by: 曹煜 <cao88yu@gmail.com>
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Once device_register() failed, we should call put_device() to
decrement reference count for cleanup. Or it will cause memory
leak.

BUG: memory leak
unreferenced object 0xffff888114032e00 (size 256):
  comm "kworker/1:3", pid 2960, jiffies 4294943572 (age 15.920s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 08 2e 03 14 81 88 ff ff  ................
    08 2e 03 14 81 88 ff ff 90 76 65 82 ff ff ff ff  .........ve.....
  backtrace:
    [<ffffffff8265cfab>] kmalloc include/linux/slab.h:591 [inline]
    [<ffffffff8265cfab>] kzalloc include/linux/slab.h:721 [inline]
    [<ffffffff8265cfab>] device_private_init drivers/base/core.c:3203 [inline]
    [<ffffffff8265cfab>] device_add+0x89b/0xdf0 drivers/base/core.c:3253
    [<ffffffff828dd643>] __mdiobus_register+0xc3/0x450 drivers/net/phy/mdio_bus.c:537
    [<ffffffff828cb835>] __devm_mdiobus_register+0x75/0xf0 drivers/net/phy/mdio_devres.c:87
    [<ffffffff82b92a00>] ax88772_init_mdio drivers/net/usb/asix_devices.c:676 [inline]
    [<ffffffff82b92a00>] ax88772_bind+0x330/0x480 drivers/net/usb/asix_devices.c:786
    [<ffffffff82baa33f>] usbnet_probe+0x3ff/0xdf0 drivers/net/usb/usbnet.c:1745
    [<ffffffff82c36e17>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<ffffffff82661d17>] call_driver_probe drivers/base/dd.c:517 [inline]
    [<ffffffff82661d17>] really_probe.part.0+0xe7/0x380 drivers/base/dd.c:596
    [<ffffffff826620bc>] really_probe drivers/base/dd.c:558 [inline]
    [<ffffffff826620bc>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:751
    [<ffffffff826621ba>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:781
    [<ffffffff82662a26>] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:898
    [<ffffffff8265eca7>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427
    [<ffffffff826625a2>] __device_attach+0x122/0x260 drivers/base/dd.c:969
    [<ffffffff82660916>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487
    [<ffffffff8265cd0b>] device_add+0x5fb/0xdf0 drivers/base/core.c:3359
    [<ffffffff82c343b9>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2170
    [<ffffffff82c4473c>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238

BUG: memory leak
unreferenced object 0xffff888116f06900 (size 32):
  comm "kworker/0:2", pid 2670, jiffies 4294944448 (age 7.160s)
  hex dump (first 32 bytes):
    75 73 62 2d 30 30 31 3a 30 30 33 00 00 00 00 00  usb-001:003.....
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff81484516>] kstrdup+0x36/0x70 mm/util.c:60
    [<ffffffff814845a3>] kstrdup_const+0x53/0x80 mm/util.c:83
    [<ffffffff82296ba2>] kvasprintf_const+0xc2/0x110 lib/kasprintf.c:48
    [<ffffffff82358d4b>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:289
    [<ffffffff826575f3>] dev_set_name+0x63/0x90 drivers/base/core.c:3147
    [<ffffffff828dd63b>] __mdiobus_register+0xbb/0x450 drivers/net/phy/mdio_bus.c:535
    [<ffffffff828cb835>] __devm_mdiobus_register+0x75/0xf0 drivers/net/phy/mdio_devres.c:87
    [<ffffffff82b92a00>] ax88772_init_mdio drivers/net/usb/asix_devices.c:676 [inline]
    [<ffffffff82b92a00>] ax88772_bind+0x330/0x480 drivers/net/usb/asix_devices.c:786
    [<ffffffff82baa33f>] usbnet_probe+0x3ff/0xdf0 drivers/net/usb/usbnet.c:1745
    [<ffffffff82c36e17>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<ffffffff82661d17>] call_driver_probe drivers/base/dd.c:517 [inline]
    [<ffffffff82661d17>] really_probe.part.0+0xe7/0x380 drivers/base/dd.c:596
    [<ffffffff826620bc>] really_probe drivers/base/dd.c:558 [inline]
    [<ffffffff826620bc>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:751
    [<ffffffff826621ba>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:781
    [<ffffffff82662a26>] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:898
    [<ffffffff8265eca7>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427
    [<ffffffff826625a2>] __device_attach+0x122/0x260 drivers/base/dd.c:969

Reported-by: syzbot+398e7dc692ddbbb4cfec@syzkaller.appspotmail.com
Signed-off-by: NYanfei Xu <yanfei.xu@windriver.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This reverts commit d437f5aa.

Code has been duplicated through commit <273c29e9> "ibmvnic: check
failover_pending in login response"
Signed-off-by: NDesnes A. Nunes do Rosario <desnesn@linux.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch is a replication of Christian Lamparter's "net: bgmac-bcma:
handle deferred probe error due to mac-address" patch for the
bgmac-platform driver [1].

As is the case with the bgmac-bcma driver, this change is to cover the
scenario where the MAC address cannot yet be discovered due to reliance
on an nvmem provider which is yet to be instantiated, resulting in a
random address being assigned that has to be manually overridden.

[1] https://lore.kernel.org/netdev/20210919115725.29064-1-chunkeey@gmail.comSigned-off-by: NMatthew Hagan <mnhagan88@gmail.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There is a spelling mistake in a dev_err error message. Fix it.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

@IEEE80211_KEY_FLAG_GENERATE_IV setting is irrelevant for RX.
Move the requirement to the correct section in the PTK0 rekey
documentation.
Signed-off-by: NAlexander Wetzel <alexander@wetzel-home.de>
Link: https://lore.kernel.org/r/20210924200514.7936-1-alexander@wetzel-home.deSigned-off-by: NJohannes Berg <johannes.berg@intel.com>

When rhashtable_init() fails, it returns -EINVAL.
However, since error return value of rhashtable_init is not checked,
it can cause use of uninitialized pointers.
So, fix unhandled errors of rhashtable_init.
Signed-off-by: NMichelleJin <shjy180909@gmail.com>
Link: https://lore.kernel.org/r/20210927033457.1020967-4-shjy180909@gmail.comSigned-off-by: NJohannes Berg <johannes.berg@intel.com>

When PN checking is done in mac80211, for fragmentation we need
to copy the PN to the RX struct so we can later use it to do a
comparison, since commit bf30ca92 ("mac80211: check defrag
PN against current frame").

Unfortunately, in that commit I used the 'hdr' variable without
it being necessarily valid, so use-after-free could occur if it
was necessary to reallocate (parts of) the frame.

Fix this by reloading the variable after the code that results
in the reallocations, if any.

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=214401.

Cc: stable@vger.kernel.org
Fixes: bf30ca92 ("mac80211: check defrag PN against current frame")
Link: https://lore.kernel.org/r/20210927115838.12b9ac6bb233.I1d066acd5408a662c3b6e828122cd314fcb28cdb@changeidSigned-off-by: NJohannes Berg <johannes.berg@intel.com>

We observed below report when playing with netlink sock:

  UBSAN: shift-out-of-bounds in net/sched/sch_api.c:580:10
  shift exponent 249 is too large for 32-bit type
  CPU: 0 PID: 685 Comm: a.out Not tainted
  Call Trace:
   dump_stack_lvl+0x8d/0xcf
   ubsan_epilogue+0xa/0x4e
   __ubsan_handle_shift_out_of_bounds+0x161/0x182
   __qdisc_calculate_pkt_len+0xf0/0x190
   __dev_queue_xmit+0x2ed/0x15b0

it seems like kernel won't check the stab log value passing from
user, and will use the insane value later to calculate pkt_len.

This patch just add a check on the size/cell_log to avoid insane
calculation.
Reported-by: NAbaci <abaci@linux.alibaba.com>
Signed-off-by: NMichael Wang <yun.wang@linux.alibaba.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Pablo Neira Ayuso says:

====================
Netfilter/IPVS fixes for net

1) ipset limits the max allocatable memory via kvmalloc() to MAX_INT,
   from Jozsef Kadlecsik.

2) Check ip_vs_conn_tab_bits value to be in the range specified
   in Kconfig, from Andrea Claudi.

3) Initialize fragment offset in ip6tables, from Jeremy Sowden.

4) Make conntrack hash chain length random, from Florian Westphal.

5) Add zone ID to conntrack and NAT hashtuple again, also from Florian.

6) Add selftests for bidirectional zone support and colliding tuples,
   from Florian Westphal.

7) Unlink table before synchronize_rcu when cleaning tables with
   owner, from Florian.

8) ipset limits the max allocatable memory via kvmalloc() to MAX_INT.

9) Release conntrack entries via workqueue in masquerade, from Florian.

10) Fix bogus net_init in iptables raw table definition, also from Florian.

11) Work around missing softdep in log extensions, from Florian Westphal.

12) Serialize hash resizes and cleanups with mutex, from Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf:
  netfilter: conntrack: serialize hash resizes and cleanups
  netfilter: log: work around missing softdep backend module
  netfilter: iptable_raw: drop bogus net_init annotation
  netfilter: nf_nat_masquerade: defer conntrack walk to work queue
  netfilter: nf_nat_masquerade: make async masq_inet6_event handling generic
  netfilter: nf_tables: Fix oversized kvmalloc() calls
  netfilter: nf_tables: unlink table before deleting it
  selftests: netfilter: add zone stress test with colliding tuples
  selftests: netfilter: add selftest for directional zone support
  netfilter: nat: include zone id in nat table hash again
  netfilter: conntrack: include zone id in tuple hash again
  netfilter: conntrack: make max chain length random
  netfilter: ip6_tables: zero-initialize fragment offset
  ipvs: check that ip_vs_conn_tab_bits is between 8 and 20
  netfilter: ipset: Fix oversized kvmalloc() calls
====================

Link: https://lore.kernel.org/r/20210924221113.348767-1-pablo@netfilter.orgSigned-off-by: NJakub Kicinski <kuba@kernel.org>

Fix double free_netdev when mhi_prepare_for_transfer fails.

Fixes: 3ffec6a1 ("net: Add mhi-net driver")
Signed-off-by: NDaniele Palmas <dnlplm@gmail.com>
Reviewed-by: NManivannan Sadhasivam <mani@kernel.org>
Reviewed-by: NLoic Poulain <loic.poulain@linaro.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

After commit 05b35e7e ("smsc95xx: add phylib support"), link changes
are no longer propagated to usbnet. As a result, rx URB allocation won't
happen until there is a packet sent out first (this might never happen,
e.g. running just ssh server with a static IP). Fix by triggering usbnet
EVENT_LINK_CHANGE.

Fixes: 05b35e7e ("smsc95xx: add phylib support")
Signed-off-by: NAaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Multipath RTA_FLOW is embedded in nexthop. Dump it in fib_add_nexthop()
to get the length of rtnexthop correct.

Fixes: b0f60193 ("ipv4: Refactor nexthop attributes in fib_dump_info")
Signed-off-by: NXiao Liang <shaw.leon@gmail.com>
Reviewed-by: NDavid Ahern <dsahern@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The enetc phylink .mac_config handler intends to clear the IFMODE field
(bits 1:0) of the PM0_IF_MODE register, but incorrectly clears all the
other fields instead.

For normal operation, the bug was inconsequential, due to the fact that
we write the PM0_IF_MODE register in two stages, first in
phylink .mac_config (which incorrectly cleared out a bunch of stuff),
then we update the speed and duplex to the correct values in
phylink .mac_link_up.

Judging by the code (not tested), it looks like maybe loopback mode was
broken, since this is one of the settings in PM0_IF_MODE which is
incorrectly cleared.

Fixes: c76a9721 ("net: enetc: force the RGMII speed and duplex instead of operating in inband mode")
Reported-by: NPavel Machek (CIP) <pavel@denx.de>
Signed-off-by: NVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Mat Martineau says:

====================
mptcp: Bug fixes

This patch set includes two separate fixes for the net tree:

Patch 1 makes sure that MPTCP token searches are always limited to the
appropriate net namespace.

Patch 2 allows userspace to always change the backup settings for
configured endpoints even if those endpoints are not currently in use.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

current Linux refuses to change the 'backup' bit of MPTCP endpoints, i.e.
using MPTCP_PM_CMD_SET_FLAGS, unless it finds (at least) one subflow that
matches the endpoint address. There is no reason for that, so we can just
ignore the return value of mptcp_nl_addr_backup(). In this way, endpoints
can reconfigure their 'backup' flag even if no MPTCP sockets are open (or
more generally, in case the MP_PRIO message is not sent out).

Fixes: 0f9f696a ("mptcp: add set_flags command in PM netlink")
Signed-off-by: NDavide Caratti <dcaratti@redhat.com>
Signed-off-by: NMat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

mptcp_token_get_sock() may return a mptcp socket that is in
a different net namespace than the socket that received the token value.

The mptcp syncookie code path had an explicit check for this,
this moves the test into mptcp_token_get_sock() function.

Eventually token.c should be converted to pernet storage, but
such change is not suitable for net tree.

Fixes: 2c5ebd00 ("mptcp: refactor token container")
Signed-off-by: NFlorian Westphal <fw@strlen.de>
Signed-off-by: NMat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

We should always check if skb_header_pointer's return is NULL before
using it, otherwise it may cause null-ptr-deref, as syzbot reported:

  KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
  RIP: 0010:sctp_rcv_ootb net/sctp/input.c:705 [inline]
  RIP: 0010:sctp_rcv+0x1d84/0x3220 net/sctp/input.c:196
  Call Trace:
  <IRQ>
   sctp6_rcv+0x38/0x60 net/sctp/ipv6.c:1109
   ip6_protocol_deliver_rcu+0x2e9/0x1ca0 net/ipv6/ip6_input.c:422
   ip6_input_finish+0x62/0x170 net/ipv6/ip6_input.c:463
   NF_HOOK include/linux/netfilter.h:307 [inline]
   NF_HOOK include/linux/netfilter.h:301 [inline]
   ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:472
   dst_input include/net/dst.h:460 [inline]
   ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
   NF_HOOK include/linux/netfilter.h:307 [inline]
   NF_HOOK include/linux/netfilter.h:301 [inline]
   ipv6_rcv+0x28c/0x3c0 net/ipv6/ip6_input.c:297

Fixes: 3acb50c1 ("sctp: delay as much as possible skb_linearize")
Reported-by: syzbot+581aff2ae6b860625116@syzkaller.appspotmail.com
Signed-off-by: NXin Long <lucien.xin@gmail.com>
Acked-by: NMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Pull networking fixes from Jakub Kicinski:
 "Current release - regressions:

   - dsa: bcm_sf2: fix array overrun in bcm_sf2_num_active_ports()

  Previous releases - regressions:

   - introduce a shutdown method to mdio device drivers, and make DSA
     switch drivers compatible with masters disappearing on shutdown;
     preventing infinite reference wait

   - fix issues in mdiobus users related to ->shutdown vs ->remove

   - virtio-net: fix pages leaking when building skb in big mode

   - xen-netback: correct success/error reporting for the
     SKB-with-fraglist

   - dsa: tear down devlink port regions when tearing down the devlink
     port on error

   - nexthop: fix division by zero while replacing a resilient group

   - hns3: check queue, vf, vlan ids range before using

  Previous releases - always broken:

   - napi: fix race against netpoll causing NAPI getting stuck

   - mlx4_en: ensure link operstate is updated even if link comes up
     before netdev registration

   - bnxt_en: fix TX timeout when TX ring size is set to the smallest

   - enetc: fix illegal access when reading affinity_hint; prevent oops
     on sysfs access

   - mtk_eth_soc: avoid creating duplicate offload entries

  Misc:

   - core: correct the sock::sk_lock.owned lockdep annotations"

* tag 'net-5.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (51 commits)
  atlantic: Fix issue in the pm resume flow.
  net/mlx4_en: Don't allow aRFS for encapsulated packets
  net: mscc: ocelot: fix forwarding from BLOCKING ports remaining enabled
  net: ethernet: mtk_eth_soc: avoid creating duplicate offload entries
  nfc: st-nci: Add SPI ID matching DT compatible
  MAINTAINERS: remove Guvenc Gulce as net/smc maintainer
  nexthop: Fix memory leaks in nexthop notification chain listeners
  mptcp: ensure tx skbs always have the MPTCP ext
  qed: rdma - don't wait for resources under hw error recovery flow
  s390/qeth: fix deadlock during failing recovery
  s390/qeth: Fix deadlock in remove_discipline
  s390/qeth: fix NULL deref in qeth_clear_working_pool_list()
  net: dsa: realtek: register the MDIO bus under devres
  net: dsa: don't allocate the slave_mii_bus using devres
  Doc: networking: Fox a typo in ice.rst
  net: dsa: fix dsa_tree_setup error path
  net/smc: fix 'workqueue leaked lock' in smc_conn_abort_work
  net/smc: add missing error check in smc_clc_prfx_set()
  net: hns3: fix a return value error in hclge_get_reset_status()
  net: hns3: check vlan id before using it
  ...

Prior to the commit 7e1c0d6f ("memcg: switch lruvec stats to rstat")
and the commit aa48e47e ("memcg: infrastructure to flush memcg
stats"), each lruvec memcg stats can be off by (nr_cgroups * nr_cpus *
32) at worst and for unbounded amount of time.  The commit aa48e47e
moved the lruvec stats to rstat infrastructure and the commit
7e1c0d6f bounded the error for all the lruvec stats to (nr_cpus *
32) at worst for at most 2 seconds.  More specifically it decoupled the
number of stats and the number of cgroups from the error rate.

However this reduction in error comes with the cost of triggering the
slowpath of stats update more frequently.  Previously in the slowpath
the kernel adds the stats up the memcg tree.  After aa48e47e, the
kernel triggers the asyn lruvec stats flush through queue_work().  This
causes regression reports from 0day kernel bot [1] as well as from
phoronix test suite [2].

We tried two options to fix the regression:

 1) Increase the threshold to trigger the slowpath in lruvec stats
    update codepath from 32 to 512.

 2) Remove the slowpath from lruvec stats update codepath and instead
    flush the stats in the page refault codepath. The assumption is that
    the kernel timely flush the stats, so, the update tree would be
    small in the refault codepath to not cause the preformance impact.

Following are the results of will-it-scale/page_fault[1|2|3] benchmark
on four settings i.e.  (1) 5.15-rc1 as baseline (2) 5.15-rc1 with
aa48e47e and 7e1c0d6f reverted (3) 5.15-rc1 with option-1
(4) 5.15-rc1 with option-2.

  test       (1)      (2)               (3)               (4)
  pg_f1   368563   406277 (10.23%)   399693  (8.44%)   416398 (12.97%)
  pg_f2   338399   372133  (9.96%)   369180  (9.09%)   381024 (12.59%)
  pg_f3   500853   575399 (14.88%)   570388 (13.88%)   576083 (15.02%)

From the above result, it seems like the option-2 not only solves the
regression but also improves the performance for at least these
benchmarks.

Feng Tang (intel) ran the aim7 benchmark with these two options and
confirms that option-1 reduces the regression but option-2 removes the
regression.

Michael Larabel (phoronix) ran multiple benchmarks with these options
and reported the results at [3] and it shows for most benchmarks
option-2 removes the regression introduced by the commit aa48e47e
("memcg: infrastructure to flush memcg stats").

Based on the experiment results, this patch proposed the option-2 as the
solution to resolve the regression.

Link: https://lore.kernel.org/all/20210726022421.GB21872@xsang-OptiPlex-9020 [1]
Link: https://www.phoronix.com/scan.php?page=article&item=linux515-compile-regress [2]
Link: https://openbenchmarking.org/result/2109226-DEBU-LINUX5104 [3]
Fixes: aa48e47e ("memcg: infrastructure to flush memcg stats")
Signed-off-by: NShakeel Butt <shakeelb@google.com>
Tested-by: NMichael Larabel <Michael@phoronix.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Roman Gushchin <guro@fb.com>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Hillf Danton <hdanton@sina.com>,
Cc: Michal Koutný <mkoutny@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

After fixing hibernation resume flow, another usecase was found which
should be explicitly handled - resume when device is in "down" state.
Invoke aq_nic_init jointly with aq_nic_start only if ndev was already
up during suspend/hibernate. We still need to perform nic_deinit() if
caller requests for it, to handle the freeze/resume scenarios.

Fixes: 57f780f1 ("atlantic: Fix driver resume flow.")
Signed-off-by: NSudarsana Reddy Kalluru <skalluru@marvell.com>
Signed-off-by: NIgor Russkikh <irusskikh@marvell.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Driver doesn't support aRFS for encapsulated packets, return early error
in such a case.

Fixes: 1eb8c695 ("net/mlx4_en: Add accelerated RFS support")
Signed-off-by: NAya Levin <ayal@nvidia.com>
Signed-off-by: NTariq Toukan <tariqt@nvidia.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The blamed commit made the fatally incorrect assumption that ports which
aren't in the FORWARDING STP state should not have packets forwarded
towards them, and that is all that needs to be done.

However, that logic alone permits BLOCKING ports to forward to
FORWARDING ports, which of course allows packet storms to occur when
there is an L2 loop.

The ocelot_get_bridge_fwd_mask should not only ask "what can the bridge
do for you", but "what can you do for the bridge". This way, only
FORWARDING ports forward to the other FORWARDING ports from the same
bridging domain, and we are still compatible with the idea of multiple
bridges.

Fixes: df291e54 ("net: ocelot: support multiple bridges")
Suggested-by: NColin Foster <colin.foster@in-advantage.com>
Reported-by: NColin Foster <colin.foster@in-advantage.com>
Signed-off-by: NVladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: NColin Foster <colin.foster@in-advantage.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Sometimes multiple CLS_REPLACE calls are issued for the same connection.
rhashtable_insert_fast does not check for these duplicates, so multiple
hardware flow entries can be created.
Fix this by checking for an existing entry early

Fixes: 502e84e2 ("net: ethernet: mtk_eth_soc: add flow offloading support")
Signed-off-by: NFelix Fietkau <nbd@nbd.name>
Signed-off-by: NIlya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Currently autoloading for SPI devices does not use the DT ID table, it uses
SPI modalises. Supporting OF modalises is going to be difficult if not
impractical, an attempt was made but has been reverted, so ensure that
module autoloading works for this driver by adding the part name used in
the compatible to the list of SPI IDs.

Fixes: 96c8395e ("spi: Revert modalias changes")
Signed-off-by: NMark Brown <broonie@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Remove myself as net/smc maintainer, as I am
leaving IBM soon and can not maintain net/smc anymore.

Cc: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: NKarsten Graul <kgraul@linux.ibm.com>
Signed-off-by: NGuvenc Gulce <guvenc@linux.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

syzkaller discovered memory leaks [1] that can be reduced to the
following commands:

 # ip nexthop add id 1 blackhole
 # devlink dev reload pci/0000:06:00.0

As part of the reload flow, mlxsw will unregister its netdevs and then
unregister from the nexthop notification chain. Before unregistering
from the notification chain, mlxsw will receive delete notifications for
nexthop objects using netdevs registered by mlxsw or their uppers. mlxsw
will not receive notifications for nexthops using netdevs that are not
dismantled as part of the reload flow. For example, the blackhole
nexthop above that internally uses the loopback netdev as its nexthop
device.

One way to fix this problem is to have listeners flush their nexthop
tables after unregistering from the notification chain. This is
error-prone as evident by this patch and also not symmetric with the
registration path where a listener receives a dump of all the existing
nexthops.

Therefore, fix this problem by replaying delete notifications for the
listener being unregistered. This is symmetric to the registration path
and also consistent with the netdev notification chain.

The above means that unregister_nexthop_notifier(), like
register_nexthop_notifier(), will have to take RTNL in order to iterate
over the existing nexthops and that any callers of the function cannot
hold RTNL. This is true for mlxsw and netdevsim, but not for the VXLAN
driver. To avoid a deadlock, change the latter to unregister its nexthop
listener without holding RTNL, making it symmetric to the registration
path.

[1]
unreferenced object 0xffff88806173d600 (size 512):
  comm "syz-executor.0", pid 1290, jiffies 4295583142 (age 143.507s)
  hex dump (first 32 bytes):
    41 9d 1e 60 80 88 ff ff 08 d6 73 61 80 88 ff ff  A..`......sa....
    08 d6 73 61 80 88 ff ff 01 00 00 00 00 00 00 00  ..sa............
  backtrace:
    [<ffffffff81a6b576>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<ffffffff81a6b576>] slab_post_alloc_hook+0x96/0x490 mm/slab.h:522
    [<ffffffff81a716d3>] slab_alloc_node mm/slub.c:3206 [inline]
    [<ffffffff81a716d3>] slab_alloc mm/slub.c:3214 [inline]
    [<ffffffff81a716d3>] kmem_cache_alloc_trace+0x163/0x370 mm/slub.c:3231
    [<ffffffff82e8681a>] kmalloc include/linux/slab.h:591 [inline]
    [<ffffffff82e8681a>] kzalloc include/linux/slab.h:721 [inline]
    [<ffffffff82e8681a>] mlxsw_sp_nexthop_obj_group_create drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:4918 [inline]
    [<ffffffff82e8681a>] mlxsw_sp_nexthop_obj_new drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:5054 [inline]
    [<ffffffff82e8681a>] mlxsw_sp_nexthop_obj_event+0x59a/0x2910 drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:5239
    [<ffffffff813ef67d>] notifier_call_chain+0xbd/0x210 kernel/notifier.c:83
    [<ffffffff813f0662>] blocking_notifier_call_chain kernel/notifier.c:318 [inline]
    [<ffffffff813f0662>] blocking_notifier_call_chain+0x72/0xa0 kernel/notifier.c:306
    [<ffffffff8384b9c6>] call_nexthop_notifiers+0x156/0x310 net/ipv4/nexthop.c:244
    [<ffffffff83852bd8>] insert_nexthop net/ipv4/nexthop.c:2336 [inline]
    [<ffffffff83852bd8>] nexthop_add net/ipv4/nexthop.c:2644 [inline]
    [<ffffffff83852bd8>] rtm_new_nexthop+0x14e8/0x4d10 net/ipv4/nexthop.c:2913
    [<ffffffff833e9a78>] rtnetlink_rcv_msg+0x448/0xbf0 net/core/rtnetlink.c:5572
    [<ffffffff83608703>] netlink_rcv_skb+0x173/0x480 net/netlink/af_netlink.c:2504
    [<ffffffff833de032>] rtnetlink_rcv+0x22/0x30 net/core/rtnetlink.c:5590
    [<ffffffff836069de>] netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
    [<ffffffff836069de>] netlink_unicast+0x5ae/0x7f0 net/netlink/af_netlink.c:1340
    [<ffffffff83607501>] netlink_sendmsg+0x8e1/0xe30 net/netlink/af_netlink.c:1929
    [<ffffffff832fde84>] sock_sendmsg_nosec net/socket.c:704 [inline]
    [<ffffffff832fde84>] sock_sendmsg net/socket.c:724 [inline]
    [<ffffffff832fde84>] ____sys_sendmsg+0x874/0x9f0 net/socket.c:2409
    [<ffffffff83304a44>] ___sys_sendmsg+0x104/0x170 net/socket.c:2463
    [<ffffffff83304c01>] __sys_sendmsg+0x111/0x1f0 net/socket.c:2492
    [<ffffffff83304d5d>] __do_sys_sendmsg net/socket.c:2501 [inline]
    [<ffffffff83304d5d>] __se_sys_sendmsg net/socket.c:2499 [inline]
    [<ffffffff83304d5d>] __x64_sys_sendmsg+0x7d/0xc0 net/socket.c:2499

Fixes: 2a014b20 ("mlxsw: spectrum_router: Add support for nexthop objects")
Signed-off-by: NIdo Schimmel <idosch@nvidia.com>
Reviewed-by: NPetr Machata <petrm@nvidia.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Thomas explained in https://lore.kernel.org/r/87mtoeb4hb.ffs@tglx
that our handling of the hrtimer here is wrong: If the timer fires
late (e.g. due to vCPU scheduling, as reported by Dmitry/syzbot)
then it tries to actually rearm the timer at the next deadline,
which might be in the past already:

 1          2          3          N          N+1
 |          |          |   ...    |          |

 ^ intended to fire here (1)
            ^ next deadline here (2)
                                      ^ actually fired here

The next time it fires, it's later, but will still try to schedule
for the next deadline (now 3), etc. until it catches up with N,
but that might take a long time, causing stalls etc.

Now, all of this is simulation, so we just have to fix it, but
note that the behaviour is wrong even per spec, since there's no
value then in sending all those beacons unaligned - they should be
aligned to the TBTT (1, 2, 3, ... in the picture), and if we're a
bit (or a lot) late, then just resume at that point.

Therefore, change the code to use hrtimer_forward_now() which will
ensure that the next firing of the timer would be at N+1 (in the
picture), i.e. the next interval point after the current time.
Suggested-by: NThomas Gleixner <tglx@linutronix.de>
Reported-by: NDmitry Vyukov <dvyukov@google.com>
Reported-by: syzbot+0e964fad69a9c462bc1e@syzkaller.appspotmail.com
Fixes: 01e59e46 ("mac80211_hwsim: hrtimer beacon")
Reviewed-by: NThomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210915112936.544f383472eb.I3f9712009027aa09244b65399bf18bf482a8c4f1@changeidSigned-off-by: NJohannes Berg <johannes.berg@intel.com>

The pointer here points directly into the frame, so the
access is potentially unaligned. Use get_unaligned_le16
to avoid that.

Fixes: 3f52b7e3 ("mac80211: mesh power save basics")
Link: https://lore.kernel.org/r/20210920154009.3110ff75be0c.Ib6a2ff9e9cc9bc6fca50fce631ec1ce725cc926b@changeidSigned-off-by: NJohannes Berg <johannes.berg@intel.com>

Limit max values for vht mcs and nss in ieee80211_parse_tx_radiotap
routine in order to fix the following warning reported by syzbot:

WARNING: CPU: 0 PID: 10717 at include/net/mac80211.h:989 ieee80211_rate_set_vht include/net/mac80211.h:989 [inline]
WARNING: CPU: 0 PID: 10717 at include/net/mac80211.h:989 ieee80211_parse_tx_radiotap+0x101e/0x12d0 net/mac80211/tx.c:2244
Modules linked in:
CPU: 0 PID: 10717 Comm: syz-executor.5 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ieee80211_rate_set_vht include/net/mac80211.h:989 [inline]
RIP: 0010:ieee80211_parse_tx_radiotap+0x101e/0x12d0 net/mac80211/tx.c:2244
RSP: 0018:ffffc9000186f3e8 EFLAGS: 00010216
RAX: 0000000000000618 RBX: ffff88804ef76500 RCX: ffffc900143a5000
RDX: 0000000000040000 RSI: ffffffff888f478e RDI: 0000000000000003
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000100
R10: ffffffff888f46f9 R11: 0000000000000000 R12: 00000000fffffff8
R13: ffff88804ef7653c R14: 0000000000000001 R15: 0000000000000004
FS:  00007fbf5718f700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2de23000 CR3: 000000006a671000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 ieee80211_monitor_select_queue+0xa6/0x250 net/mac80211/iface.c:740
 netdev_core_pick_tx+0x169/0x2e0 net/core/dev.c:4089
 __dev_queue_xmit+0x6f9/0x3710 net/core/dev.c:4165
 __bpf_tx_skb net/core/filter.c:2114 [inline]
 __bpf_redirect_no_mac net/core/filter.c:2139 [inline]
 __bpf_redirect+0x5ba/0xd20 net/core/filter.c:2162
 ____bpf_clone_redirect net/core/filter.c:2429 [inline]
 bpf_clone_redirect+0x2ae/0x420 net/core/filter.c:2401
 bpf_prog_eeb6f53a69e5c6a2+0x59/0x234
 bpf_dispatcher_nop_func include/linux/bpf.h:717 [inline]
 __bpf_prog_run include/linux/filter.h:624 [inline]
 bpf_prog_run include/linux/filter.h:631 [inline]
 bpf_test_run+0x381/0xa30 net/bpf/test_run.c:119
 bpf_prog_test_run_skb+0xb84/0x1ee0 net/bpf/test_run.c:663
 bpf_prog_test_run kernel/bpf/syscall.c:3307 [inline]
 __sys_bpf+0x2137/0x5df0 kernel/bpf/syscall.c:4605
 __do_sys_bpf kernel/bpf/syscall.c:4691 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4689 [inline]
 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4689
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9

Reported-by: syzbot+0196ac871673f0c20f68@syzkaller.appspotmail.com
Fixes: 646e76bb ("mac80211: parse VHT info in injected frames")
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/c26c3f02dcb38ab63b2f2534cb463d95ee81bb13.1632141760.git.lorenzo@kernel.orgSigned-off-by: NJohannes Berg <johannes.berg@intel.com>

WARNING: CPU: 1 PID: 9 at net/mac80211/sta_info.c:554
sta_info_insert_rcu+0x121/0x12a0
Modules linked in:
CPU: 1 PID: 9 Comm: kworker/u8:1 Not tainted 5.14.0-rc7+ #253
Workqueue: phy3 ieee80211_iface_work
RIP: 0010:sta_info_insert_rcu+0x121/0x12a0
...
Call Trace:
 ieee80211_ibss_finish_sta+0xbc/0x170
 ieee80211_ibss_work+0x13f/0x7d0
 ieee80211_iface_work+0x37a/0x500
 process_one_work+0x357/0x850
 worker_thread+0x41/0x4d0

If an Ad-Hoc node receives packets with invalid source MAC address,
it hits a WARN_ON in sta_info_insert_check(), this can spam the log.
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20210827144230.39944-1-yuehaibing@huawei.comSigned-off-by: NJohannes Berg <johannes.berg@intel.com>

In ieee80211_amsdu_aggregate() set a pointer frag_tail point to the
end of skb_shinfo(head)->frag_list, and use it to bind other skb in
the end of this function. But when execute ieee80211_amsdu_aggregate()
->ieee80211_amsdu_realloc_pad()->pskb_expand_head(), the address of
skb_shinfo(head)->frag_list will be changed. However, the
ieee80211_amsdu_aggregate() not update frag_tail after call
pskb_expand_head(). That will cause the second skb can't bind to the
head skb appropriately.So we update the address of frag_tail to fix it.

Fixes: 6e0456b5 ("mac80211: add A-MSDU tx support")
Signed-off-by: NChih-Kang Chang <gary.chang@realtek.com>
Signed-off-by: NZong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: NPing-Ke Shih <pkshih@realtek.com>
Link: https://lore.kernel.org/r/20210830073240.12736-1-pkshih@realtek.com
[reword comment]
Signed-off-by: NJohannes Berg <johannes.berg@intel.com>

This reverts commit d3333223 ("mac80211: do not use low data rates for
data frames with no ack flag").

Returning false early in rate_control_send_low breaks sending broadcast
packets, since rate control will not select a rate for it.

Before re-introducing a fixed version of this patch, we should probably also
make some changes to rate control to be more conservative in selecting rates
for no-ack packets and also prevent using probing rates on them, since we won't
get any feedback.

Fixes: d3333223 ("mac80211: do not use low data rates for data frames with no ack flag")
Signed-off-by: NFelix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20210906083559.9109-1-nbd@nbd.nameSigned-off-by: NJohannes Berg <johannes.berg@intel.com>

Commit f8ade8dd ("xsurf100: drop include of lib8390.c") accidentally
changed init/main.c.  Revert that part.

Fixes: f8ade8dd ("xsurf100: drop include of lib8390.c")
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>