Older SMCR implementations had no link failover support and used one
link only. Because the handshake protocol requires to try the
establishment of a second link the old code sent a fake add_link message
and declined any server response afterwards.
The current code supports multiple links and inspects the received fake
add_link message more closely. To tolerate the fake add_link messages
smc_llc_is_local_add_link() needs an improved check of the message to
be able to separate between locally enqueued and fake add_link messages.
And smc_llc_cli_add_link() needs to check if the provided qp_mtu size is
invalid and reject the add_link request in that case.

Fixes: c48254fa ("net/smc: move add link processing for new device into llc layer")
Reviewed-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

If tg3_reset_task() fails, the device state is left in an inconsistent
state with IFF_RUNNING still set but NAPI state not enabled.  A
subsequent operation, such as ifdown or AER error can cause it to
soft lock up when it tries to disable NAPI state.

Fix it by bringing down the device to !IFF_RUNNING state when
tg3_reset_task() fails.  tg3_reset_task() running from workqueue
will now call tg3_close() when the reset fails.  We need to
modify tg3_reset_task_cancel() slightly to avoid tg3_close()
calling cancel_work_sync() to cancel tg3_reset_task().  Otherwise
cancel_work_sync() will wait forever for tg3_reset_task() to
finish.
Reported-by: David Christensen <drc@linux.vnet.ibm.com>
Reported-by: Baptiste Covolato <baptiste@arista.com>
Fixes: db219973 ("tg3: Schedule at most one tg3_reset_task run")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In the "single port" example code for configuring a DSA switch without
tagging support from userspace the command to bring up the "lan2" link
was typo'd.
Signed-off-by: Paul Barker <pbarker@konsulko.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fix the registers being written to as the values were being over written
when writing the same registers.

Fixes: caabee5b ("net: phy: dp83867: support Wake on LAN")
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fix an issue where the driver wrongly detected ipv6 neighbour updates
from the NFP as corrupt. Add a reserved field on the kernel side so
it is similar to the ipv4 version of the struct and has space for the
extra bytes from the card.

Fixes: 9ea9bfa1 ("nfp: flower: support ipv6 tunnel keep-alive messages from fw")
Signed-off-by: Louis Peens <louis.peens@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

syzbot is reporting hung task at nbd_ioctl() [1], for there are two
problems regarding TIPC's connectionless socket's shutdown() operation.

----------
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <linux/nbd.h>
#include <unistd.h>

int main(int argc, char *argv[])
{
        const int fd = open("/dev/nbd0", 3);
        alarm(5);
        ioctl(fd, NBD_SET_SOCK, socket(PF_TIPC, SOCK_DGRAM, 0));
        ioctl(fd, NBD_DO_IT, 0); /* To be interrupted by SIGALRM. */
        return 0;
}
----------

One problem is that wait_for_completion() from flush_workqueue() from
nbd_start_device_ioctl() from nbd_ioctl() cannot be completed when
nbd_start_device_ioctl() received a signal at wait_event_interruptible(),
for tipc_shutdown() from kernel_sock_shutdown(SHUT_RDWR) from
nbd_mark_nsock_dead() from sock_shutdown() from nbd_start_device_ioctl()
is failing to wake up a WQ thread sleeping at wait_woken() from
tipc_wait_for_rcvmsg() from sock_recvmsg() from sock_xmit() from
nbd_read_stat() from recv_work() scheduled by nbd_start_device() from
nbd_start_device_ioctl(). Fix this problem by always invoking
sk->sk_state_change() (like inet_shutdown() does) when tipc_shutdown() is
called.

The other problem is that tipc_wait_for_rcvmsg() cannot return when
tipc_shutdown() is called, for tipc_shutdown() sets sk->sk_shutdown to
SEND_SHUTDOWN (despite "how" is SHUT_RDWR) while tipc_wait_for_rcvmsg()
needs sk->sk_shutdown set to RCV_SHUTDOWN or SHUTDOWN_MASK. Fix this
problem by setting sk->sk_shutdown to SHUTDOWN_MASK (like inet_shutdown()
does) when the socket is connectionless.

[1] https://syzkaller.appspot.com/bug?id=3fe51d307c1f0a845485cf1798aa059d12bf18b2Reported-by: syzbot <syzbot+e36f41d207137b5d12f7@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>

Cited commit added the possible value of '2', but it cannot be set. Fix
it by adjusting the maximum value to '2'. This is consistent with the
corresponding IPv4 sysctl.

Before:

# sysctl -w net.ipv6.fib_multipath_hash_policy=2
sysctl: setting key "net.ipv6.fib_multipath_hash_policy": Invalid argument
net.ipv6.fib_multipath_hash_policy = 2
# sysctl net.ipv6.fib_multipath_hash_policy
net.ipv6.fib_multipath_hash_policy = 0

After:

# sysctl -w net.ipv6.fib_multipath_hash_policy=2
net.ipv6.fib_multipath_hash_policy = 2
# sysctl net.ipv6.fib_multipath_hash_policy
net.ipv6.fib_multipath_hash_policy = 2

Fixes: d8f74f09 ("ipv6: Support multipath hashing on inner IP pkts")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Stephen Suryaputra <ssuryaextr@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Change the default value of hard_header_len in hdlc.c from 16 to 0.

Currently there are 6 HDLC protocol drivers, among them:

hdlc_raw_eth, hdlc_cisco, hdlc_ppp, hdlc_x25 set hard_header_len when
attaching the protocol, overriding the default. So this patch does not
affect them.

hdlc_raw and hdlc_fr don't set hard_header_len when attaching the
protocol. So this patch will change the hard_header_len of the HDLC
device for them from 16 to 0.

This is the correct change because both hdlc_raw and hdlc_fr don't have
header_ops, and the code in net/packet/af_packet.c expects the value of
hard_header_len to be consistent with header_ops.

In net/packet/af_packet.c, in the packet_snd function,
for AF_PACKET/DGRAM sockets it would reserve a headroom of
hard_header_len and call dev_hard_header to fill in that headroom,
and for AF_PACKET/RAW sockets, it does not reserve the headroom and
does not call dev_hard_header, but checks if the user has provided a
header of length hard_header_len (in function dev_validate_header).

Cc: Krzysztof Halasa <khc@pm.waw.pl>
Cc: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

We recently added some calls to clk_disable_unprepare() but we missed
the last error path if register_netdev() fails.

I made a couple cleanups so we avoid mistakes like this in the future.
First I reversed the "if (!ret)" condition and pulled the code in one
indent level.  Also, the "port->netdev = NULL;" is not required because
"port" isn't used again outside this function so I deleted that line.

Fixes: 4d5ae32f ("net: ethernet: Add a driver for Gemini gigabit ethernet")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

VALIDATE_MASK(eth_mask->h_source) is checked twice in a row in
bcmgenet_validate_flow(). Add VALIDATE_MASK(eth_mask->h_dest)
instead.

Fixes: 3e370952 ("net: bcmgenet: add support for ethtool rxnfc flows")
Signed-off-by: Denis Efremov <efremov@linux.com>
Acked-by: Doug Berger <opendmb@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add support for a new port mode that is a backplane connection without
support for auto negotiation.
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Keenetic Plus DSL is a xDSL modem that uses dm9620 as its USB interface.
Signed-off-by: Kamil Lorenc <kamil@re-ws.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

"enable" should be "disable" when the function name is
vhost_disable_notify(), which does the disabling work.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

On machines with much memory (> 2 TByte) and log_mtts_per_seg == 0, a
max_order of 31 will be passed to mlx_buddy_init(), which results in
s = BITS_TO_LONGS(1 << 31) becoming a negative value, leading to
kvmalloc_array() failure when it is converted to size_t.

  mlx4_core 0000:b1:00.0: Failed to initialize memory region table, aborting
  mlx4_core: probe of 0000:b1:00.0 failed with error -12

Fix this issue by changing the left shifting operand from a signed literal to
an unsigned one.

Fixes: 225c7b1f ("IB/mlx4: Add a driver Mellanox ConnectX InfiniBand adapters")
Signed-off-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Error on calling kthread_create_on_node prints wrong function name,
kernel_thread.

Fixes: 94dcf29a ("kthread: use kthread_create_on_node()")
Signed-off-by: Leesoo Ahn <dev@ooseel.net>
Acked-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

In RMII link mode it's required to set bit 15 IFCTL_A in MAC_SL MAC_CONTROL
register to enable support for 100Mbit link speed.

Fixes: 93a76530 ("net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

When multiple adapters are present in the system, pci hot-removing second
adapter leads to the following warning as both the adapters registered
thermal zone device with same thermal zone name/type.
Therefore, use unique thermal zone name during thermal zone device
initialization. Also mark thermal zone dev NULL once unregistered.

[  414.370143] ------------[ cut here ]------------
[  414.370944] sysfs group 'power' not found for kobject 'hwmon0'
[  414.371747] WARNING: CPU: 9 PID: 2661 at fs/sysfs/group.c:281
 sysfs_remove_group+0x76/0x80
[  414.382550] CPU: 9 PID: 2661 Comm: bash Not tainted 5.8.0-rc6+ #33
[  414.383593] Hardware name: Supermicro X10SRA-F/X10SRA-F, BIOS 2.0a 06/23/2016
[  414.384669] RIP: 0010:sysfs_remove_group+0x76/0x80
[  414.385738] Code: 48 89 df 5b 5d 41 5c e9 d8 b5 ff ff 48 89 df e8 60 b0 ff ff
 eb cb 49 8b 14 24 48 8b 75 00 48 c7 c7 90 ae 13 bb e8 6a 27 d0 ff <0f> 0b 5b 5d
 41 5c c3 0f 1f 00 0f 1f 44 00 00 48 85 f6 74 31 41 54
[  414.388404] RSP: 0018:ffffa22bc080fcb0 EFLAGS: 00010286
[  414.389638] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  414.390829] RDX: 0000000000000001 RSI: ffff8ee2de3e9510 RDI: ffff8ee2de3e9510
[  414.392064] RBP: ffffffffbaef2ee0 R08: 0000000000000000 R09: 0000000000000000
[  414.393224] R10: 0000000000000000 R11: 000000002b30006c R12: ffff8ee260720008
[  414.394388] R13: ffff8ee25e0a40e8 R14: ffffa22bc080ff08 R15: ffff8ee2c3be5020
[  414.395661] FS:  00007fd2a7171740(0000) GS:ffff8ee2de200000(0000)
 knlGS:0000000000000000
[  414.396825] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  414.398011] CR2: 00007f178ffe5020 CR3: 000000084c5cc003 CR4: 00000000003606e0
[  414.399172] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  414.400352] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  414.401473] Call Trace:
[  414.402685]  device_del+0x89/0x400
[  414.403819]  device_unregister+0x16/0x60
[  414.405024]  hwmon_device_unregister+0x44/0xa0
[  414.406112]  thermal_remove_hwmon_sysfs+0x196/0x200
[  414.407256]  thermal_zone_device_unregister+0x1b5/0x1f0
[  414.408415]  cxgb4_thermal_remove+0x3c/0x4f [cxgb4]
[  414.409668]  remove_one+0x212/0x290 [cxgb4]
[  414.410875]  pci_device_remove+0x36/0xb0
[  414.412004]  device_release_driver_internal+0xe2/0x1c0
[  414.413276]  pci_stop_bus_device+0x64/0x90
[  414.414433]  pci_stop_and_remove_bus_device_locked+0x16/0x30
[  414.415609]  remove_store+0x75/0x90
[  414.416790]  kernfs_fop_write+0x114/0x1b0
[  414.417930]  vfs_write+0xcf/0x210
[  414.419059]  ksys_write+0xa7/0xe0
[  414.420120]  do_syscall_64+0x4c/0xa0
[  414.421278]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  414.422335] RIP: 0033:0x7fd2a686afd0
[  414.423396] Code: Bad RIP value.
[  414.424549] RSP: 002b:00007fffc1446148 EFLAGS: 00000246 ORIG_RAX:
 0000000000000001
[  414.425638] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fd2a686afd0
[  414.426830] RDX: 0000000000000002 RSI: 00007fd2a7196000 RDI: 0000000000000001
[  414.427927] RBP: 00007fd2a7196000 R08: 000000000000000a R09: 00007fd2a7171740
[  414.428923] R10: 00007fd2a7171740 R11: 0000000000000246 R12: 00007fd2a6b43400
[  414.430082] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000000
[  414.431027] irq event stamp: 76300
[  414.435678] ---[ end trace 13865acb4d5ab00f ]---

Fixes: b1871915 ("cxgb4: Add thermal zone support")
Signed-off-by: Potnuri Bharat Teja <bharat@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This driver didn't set hard_header_len. This patch sets hard_header_len
for it according to its header_ops->create function.

This driver's header_ops->create function (cisco_hard_header) creates
a header of (struct hdlc_header), so hard_header_len should be set to
sizeof(struct hdlc_header).

Cc: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Acked-by: Krzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

Take the tx accounting out of the work_done calculation to
prevent a possible duplicate napi_schedule call when under
high Tx stress but low Rx traffic.

Fixes: b14e4e95 ("ionic: tx separate servicing")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains Netfilter fixes for net:

1) Do not delete clash entries on reply, let them expire instead,
   from Florian Westphal.

2) Do not report EAGAIN to nfnetlink, otherwise this enters a busy loop.
   Update nfnetlink_unicast() to translate EAGAIN to ENOBUFS.

3) Remove repeated words in code comments, from Randy Dunlap.

4) Several patches for the flowtable selftests, from Fabian Frederick.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

The 'this_cpu_ptr()' is used to obtain the AEAD key' TFM on the current
CPU for encryption, however the execution can be preemptible since it's
actually user-space context, so the 'using smp_processor_id() in
preemptible' has been observed.

We fix the issue by using the 'get/put_cpu_ptr()' API which consists of
a 'preempt_disable()' instead.

Fixes: fc1b6d6d ("tipc: introduce TIPC encryption & authentication")
Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

Its possible that we have more than one packet with the same ct tuple
simultaneously, e.g. when an application emits n packets on same UDP
socket from multiple threads.

NAT rules might be applied to those packets. With the right set of rules,
n packets will be mapped to m destinations, where at least two packets end
up with the same destination.

When this happens, the existing clash resolution may merge the skb that
is processed after the first has been received with the identical tuple
already in hash table.

However, its possible that this identical tuple is a NAT_CLASH tuple.
In that case the second skb will be sent, but no reply can be received
since the reply that is processed first removes the NAT_CLASH tuple.

Do not auto-delete, this gives a 1 second window for replies to be passed
back to originator.

Packets that are coming later (udp stream case) will not be affected:
they match the original ct entry, not a NAT_CLASH one.

Also prevent NAT_CLASH entries from getting offloaded.

Fixes: 6a757c07 ("netfilter: conntrack: allow insertion of clashing entries")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Daniel Borkmann says:

====================
pull-request: bpf 2020-08-28

The following pull-request contains BPF updates for your *net* tree.

We've added 4 non-merge commits during the last 4 day(s) which contain
a total of 4 files changed, 7 insertions(+), 4 deletions(-).

The main changes are:

1) Fix out of bounds access for BPF_OBJ_GET_INFO_BY_FD retrieval, from Yonghong Song.

2) Fix wrong __user annotation in bpf_stats sysctl handler, from Tobias Klauser.

3) Few fixes for BPF selftest scripting in test_{progs,maps}, from Jesper Dangaard Brouer.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Avoid bad command arguments.
Based on tools/power/cpupower/bench/cpufreq-bench_plot.sh
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Fix some shellcheck SC2181 warnings:
"Check exit code directly with e.g. 'if mycmd;', not indirectly with
$?." as suggested by Stefano Brivio.
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

'who' variable was not used in make_file()
Problem found using Shellcheck
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

exit script with comments when parameters are wrong during address
addition. No need for a message when trying to change MTU with lower
values: output is self-explanatory.
Use short testing sequence to avoid shellcheck warnings
(suggested by Stefano Brivio).
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

nft_flowtable.sh is made for bash not sh.
Also give values which not return "RTNETLINK answers: Invalid argument"
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Frontend callback reports EAGAIN to nfnetlink to retry a command, this
is used to signal that module autoloading is required. Unfortunately,
nlmsg_unicast() reports EAGAIN in case the receiver socket buffer gets
full, so it enters a busy-loop.

This patch updates nfnetlink_unicast() to turn EAGAIN into ENOBUFS and
to use nlmsg_unicast(). Remove the flags field in nfnetlink_unicast()
since this is always MSG_DONTWAIT in the existing code which is exactly
what nlmsg_unicast() passes to netlink_unicast() as parameter.

Fixes: 96518518 ("netfilter: add nftables")
Reported-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Drop duplicated words in net/netfilter/ and net/ipv4/netfilter/.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

When ->init() fails, ->destroy() is called to clean up.
So it is unnecessary to clean up in red_init(), and it
would cause some refcount underflow.

Fixes: aee9caa0 ("net: sched: sch_red: Add qevents "early_drop" and "mark"")
Reported-and-tested-by: syzbot+b33c1cb0a30ebdc8a5f9@syzkaller.appspotmail.com
Reported-and-tested-by: syzbot+e5ea5f8a3ecfd4427a1c@syzkaller.appspotmail.com
Cc: Petr Machata <petrm@mellanox.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Remove 1000baseT_Half to advertise correct hardware capability in
phylink_validate() callback function.

Fixes: 38f790a8 ("net: dsa: mt7530: Add support for port 5")
Signed-off-by: Landen Chao <landen.chao@mediatek.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The data races were reported by KCSAN:
BUG: KCSAN: data-race in netlink_recvmsg / skb_queue_tail

write (marked) to 0xffff8c0986e5a8c8 of 8 bytes by interrupt on cpu 3:
 skb_queue_tail+0xcc/0x120
 __netlink_sendskb+0x55/0x80
 netlink_broadcast_filtered+0x465/0x7e0
 nlmsg_notify+0x8f/0x120
 rtnl_notify+0x8e/0xb0
 __neigh_notify+0xf2/0x120
 neigh_update+0x927/0xde0
 arp_process+0x8a3/0xf50
 arp_rcv+0x27c/0x3b0
 __netif_receive_skb_core+0x181c/0x1840
 __netif_receive_skb+0x38/0xf0
 netif_receive_skb_internal+0x77/0x1c0
 napi_gro_receive+0x1bd/0x1f0
 e1000_clean_rx_irq+0x538/0xb20 [e1000]
 e1000_clean+0x5e4/0x1340 [e1000]
 net_rx_action+0x310/0x9d0
 __do_softirq+0xe8/0x308
 irq_exit+0x109/0x110
 do_IRQ+0x7f/0xe0
 ret_from_intr+0x0/0x1d
 0xffffffffffffffff

read to 0xffff8c0986e5a8c8 of 8 bytes by task 1463 on cpu 0:
 netlink_recvmsg+0x40b/0x820
 sock_recvmsg+0xc9/0xd0
 ___sys_recvmsg+0x1a4/0x3b0
 __sys_recvmsg+0x86/0x120
 __x64_sys_recvmsg+0x52/0x70
 do_syscall_64+0xb5/0x360
 entry_SYSCALL_64_after_hwframe+0x65/0xca
 0xffffffffffffffff

Since the write is under sk_receive_queue->lock but the read
is done as lockless. so fix it by using skb_queue_empty_lockless()
instead of skb_queue_empty() for the read in netlink_rcv_wake()
Signed-off-by: zhudi <zhudi21@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'mac80211-for-davem-2020-08-28' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
We have:
 * fixes for AQL (airtime queue limits)
 * reduce packet loss detection false positives
 * a small channel number fix for the 6 GHz band
 * a fix for 80+80/160 MHz negotiation
 * an nl80211 attribute (NL80211_ATTR_HE_6GHZ_CAPABILITY) fix
 * add a missing sanity check for the regulatory code
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

When stdout output from the selftests tool 'test_maps' gets redirected
into e.g file or pipe, then the output lines increase a lot (from 21
to 33949 lines).  This is caused by the printf that happens before the
fork() call, and there are user-space buffered printf data that seems
to be duplicated into the forked process.

To fix this fflush() stdout before the fork loop in __run_parallel().

Fixes: 1a97cf1f ("selftests/bpf: speedup test_maps")
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/159842985651.1050885.2154399297503372406.stgit@firesoul

Fix a memory leak in rxkad_verify_response() whereby the response buffer
doesn't get freed if we fail to allocate a ticket buffer.

Fixes: ef68622d ("rxrpc: Handle temporary errors better in rxkad security")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

David Howells says:

====================
rxrpc, afs: Fix probing issues

Here are some fixes for rxrpc and afs to fix issues in the RTT measuring in
rxrpc and thence the Volume Location server probing in afs:

 (1) Move the serial number of a received ACK into a local variable to
     simplify the next patch.

 (2) Fix the loss of RTT samples due to extra interposed ACKs causing
     baseline information to be discarded too early.  This is a particular
     problem for afs when it sends a single very short call to probe a
     server it hasn't talked to recently.

 (3) Fix rxrpc_kernel_get_srtt() to indicate whether it actually has seen
     any valid samples or not.

 (4) Remove a field that's set/woken, but never read/waited on.

 (5) Expose the RTT and other probe information through procfs to make
     debugging of this stuff easier.

 (6) Fix VL rotation in afs to only use summary information from VL probing
     and not the probe running state (which gets clobbered when next a
     probe is issued).

 (7) Fix VL rotation to actually return the error aggregated from the probe
     errors.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch fixes a bunch of issues in cpsw_ndo_vlan_rx_kill_vid()

 - pm_runtime_get_sync() returns non zero value. This results in
   non zero value return to caller which will be interpreted as error.
   So overwrite ret with zero.
 - If VID matches with port VLAN VID, then set error code.
 - Currently when VLAN interface is deleted, all of the VLAN mc addresses
   are removed from ALE table, however the return values from ale function
   calls are not checked. These functions can return error code -ENOENT.
   But that shouldn't happen in a normal case. So add error print to
   catch the situations so that these can be investigated and addressed.
   return zero in these cases as these are not real error case, but only
   serve to catch ALE table update related issues and help address the
   same in the driver.

Fixes: ed3525ed ("net: ethernet: ti: introduce cpsw switchdev based driver part 1 - dual-emac")
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fix some comments, including wrong function name, duplicated word and so
on.
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The buffer size is 2 Bytes and we expect to receive the same amount of
data. But sometimes we receive less data and run into uninit-was-stored
issue upon read. Hence modify the error check on the return value to match
with the buffer size as a prevention.

Reported-and-tested by: syzbot+a7e220df5a81d1ab400e@syzkaller.appspotmail.com
Signed-off-by: Himadri Pandya <himadrispandya@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>