[ Upstream commit 5b4fc3882a649c9411dd0dcad2ddb78e911d340e ]

Right now if we get a corrupted user stack frame we do a
do_exit(SIGILL) which is not helpful.

If under a debugger, this behavior causes the inferior process to
exit.  So the register and other state cannot be examined at the time
of the event.

Instead, conditionally log a rate limited kernel log message and then
force a SIGSEGV.

With bits and ideas borrowed (as usual) from powerpc.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit 2b4792eaa9f553764047d157365ed8b7787751a3 ]

Some drivers reference it via node_distance(), for example the
NVME host driver core.

ERROR: "__node_distance" [drivers/nvme/host/nvme-core.ko] undefined!
make[1]: *** [scripts/Makefile.modpost:92: __modpost] Error 1
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit 71335836 ]

When getting pr_assocstatus and pr_streamstatus by sctp_getsockopt,
it doesn't correctly process the case when policy is set with
SCTP_PR_SCTP_ALL | SCTP_PR_SCTP_MASK. It even causes a
slab-out-of-bounds in sctp_getsockopt_pr_streamstatus().

This patch fixes it by return -EINVAL for this case.

Fixes: 0ac1077e ("sctp: get pr_assoc and pr_stream all status with SCTP_PR_SCTP_ALL")
Reported-by: syzbot+5da0d0a72a9e7d791748@syzkaller.appspotmail.com
Suggested-by: NMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: NXin Long <lucien.xin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit 5ef79151 ]

The mentioned commit needs to be reverted because we cannot pass
string allocated on stack to request_irq(). This function stores
uses this pointer for later use (e.g. /proc/interrupts) so we need
to keep this string persistently.

Fixes: d6d9704a ("be2net: remove desc field from be_eq_obj")
Signed-off-by: NIvan Vecera <ivecera@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit 649f0837 ]

It was reported that WoL from S5 is broken (WoL from S3 works) and the
analysis showed that during system shutdown the network interface was
brought down already when the actual kernel shutdown started.
Therefore netif_running() returned false and as a consequence the PHY
was suspended. Obviously WoL wasn't working then.
To fix this the original patch needs to be effectively reverted.
A side effect is that when normally bringing down the interface and
WoL is enabled the PHY will remain powered on (like it was before the
original patch).

Fixes: fe87bef0 ("r8169: don't check WoL when powering down PHY and interface is down")
Reported-by: NNeil MacLeod <neil@nmacleod.com>
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commti ece23711 ]

Just like with normal GRO processing, we have to initialize
skb->next to NULL when we unlink overflow packets from the
GRO hash lists.

Fixes: d4546c25 ("net: Convert GRO SKB handling to list_head.")
Reported-by: NOleksandr Natalenko <oleksandr@natalenko.name>
Tested-by: NOleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit 7de414a9 ]

Most callers of pskb_trim_rcsum() simply drop the skb when
it fails, however, ip_check_defrag() still continues to pass
the skb up to stack. This is suspicious.

In ip_check_defrag(), after we learn the skb is an IP fragment,
passing the skb to callers makes no sense, because callers expect
fragments are defrag'ed on success. So, dropping the skb when we
can't defrag it is reasonable.

Note, prior to commit 88078d98, this is not a big problem as
checksum will be fixed up anyway. After it, the checksum is not
correct on failure.

Found this during code review.

Fixes: 88078d98 ("net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends")
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: NCong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit a22712a962912faf257e857ab6857f56a93cfb34 ]

After a failed reload, the driver is still registered to devlink, its
devlink instance is still allocated and the 'reload_fail' flag is set.
Then, in the next reload try, the driver's allocated devlink instance will
be freed without unregistering from devlink and its components (e.g,
resources). This scenario can cause a use-after-free if the user tries to
execute command via devlink user-space tool.

Fix by not freeing the devlink instance during reload (failed or not).

Fixes: 24cc68ad ("mlxsw: core: Add support for reload")
Signed-off-by: NShalom Toledo <shalomt@mellanox.com>
Reviewed-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit ad0b9d94 ]

Demands to remove FDB entries should be honored even if the FDB entry in
question was originally learned, and not added by the user. Therefore
ignore the added_by_user datum for SWITCHDEV_FDB_DEL_TO_DEVICE.

Fixes: 816a3bed ("switchdev: Add fdb.added_by_user to switchdev notifications")
Signed-off-by: NPetr Machata <petrm@mellanox.com>
Suggested-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit fb692ec4 ]

The pointer to the link group is unset in the smc connection structure
right before the call to smc_buf_unuse. Provide the lgr pointer to
smc_buf_unuse explicitly.
And move the call to smc_lgr_schedule_free_work to the end of
smc_conn_free.

Fixes: a6920d1d ("net/smc: handle unregistered buffers")
Signed-off-by: NKarsten Graul <kgraul@linux.ibm.com>
Signed-off-by: NUrsula Braun <ubraun@linux.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit 4ed591c8 ]

The intent of ip6_route_check_nh_onlink is to make sure the gateway
given for an onlink route is not actually on a connected route for
a different interface (e.g., 2001:db8:1::/64 is on dev eth1 and then
an onlink route has a via 2001:db8:1::1 dev eth2). If the gateway
lookup hits the default route then it most likely will be a different
interface than the onlink route which is ok.

Update ip6_route_check_nh_onlink to disregard the device mismatch
if the gateway lookup hits the default route. Turns out the existing
onlink tests are passing because there is no default route or it is
an unreachable default, so update the onlink tests to have a default
route other than unreachable.

Fixes: fc1e64e1 ("net/ipv6: Add support for onlink flag")
Signed-off-by: NDavid Ahern <dsahern@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit 46ebe283 ]

When there are both pop and push ethernet header actions among the
actions to be applied to a packet, an unexpected EINVAL (Invalid
argument) error is obtained. This is due to mac_proto not being reset
correctly when those actions are validated.

Reported-at:
https://mail.openvswitch.org/pipermail/ovs-discuss/2018-October/047554.html
Fixes: 91820da6 ("openvswitch: add Ethernet push and pop actions")
Signed-off-by: NJaime Caamaño Ruiz <jcaamano@suse.com>
Tested-by: NGreg Rose <gvrose8192@gmail.com>
Reviewed-by: NGreg Rose <gvrose8192@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit 414dd6fb ]

The attribute IFLA_BOND_AD_ACTOR_SYSTEM is sent to user space having the
length of sizeof(bond->params.ad_actor_system) which is 8 byte. This
patch aligns the length to ETH_ALEN to have the same MAC address exposed
as using sysfs.

Fixes: f87fda00 ("bonding: prevent out of bound accesses")
Signed-off-by: NTobias Jungel <tobias.jungel@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit ff002269 ]

The idx in vhost_vring_ioctl() was controlled by userspace, hence a
potential exploitation of the Spectre variant 1 vulnerability.

Fixing this by sanitizing idx before using it to index d->vqs.

Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: NJason Wang <jasowang@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit da715775 ]

When an FDB entry is configured, the address is validated to have the
length of an Ethernet address, but the device for which the address is
configured can be of any type.

The above can result in the use of uninitialized memory when the address
is later compared against existing addresses since 'dev->addr_len' is
used and it may be greater than ETH_ALEN, as with ip6tnl devices.

Fix this by making sure that FDB entries are only configured for
Ethernet devices.

BUG: KMSAN: uninit-value in memcmp+0x11d/0x180 lib/string.c:863
CPU: 1 PID: 4318 Comm: syz-executor998 Not tainted 4.19.0-rc3+ #49
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
  __dump_stack lib/dump_stack.c:77 [inline]
  dump_stack+0x14b/0x190 lib/dump_stack.c:113
  kmsan_report+0x183/0x2b0 mm/kmsan/kmsan.c:956
  __msan_warning+0x70/0xc0 mm/kmsan/kmsan_instr.c:645
  memcmp+0x11d/0x180 lib/string.c:863
  dev_uc_add_excl+0x165/0x7b0 net/core/dev_addr_lists.c:464
  ndo_dflt_fdb_add net/core/rtnetlink.c:3463 [inline]
  rtnl_fdb_add+0x1081/0x1270 net/core/rtnetlink.c:3558
  rtnetlink_rcv_msg+0xa0b/0x1530 net/core/rtnetlink.c:4715
  netlink_rcv_skb+0x36e/0x5f0 net/netlink/af_netlink.c:2454
  rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:4733
  netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline]
  netlink_unicast+0x1638/0x1720 net/netlink/af_netlink.c:1343
  netlink_sendmsg+0x1205/0x1290 net/netlink/af_netlink.c:1908
  sock_sendmsg_nosec net/socket.c:621 [inline]
  sock_sendmsg net/socket.c:631 [inline]
  ___sys_sendmsg+0xe70/0x1290 net/socket.c:2114
  __sys_sendmsg net/socket.c:2152 [inline]
  __do_sys_sendmsg net/socket.c:2161 [inline]
  __se_sys_sendmsg+0x2a3/0x3d0 net/socket.c:2159
  __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2159
  do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291
  entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x440ee9
Code: e8 cc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 bb 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff6a93b518 EFLAGS: 00000213 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440ee9
RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8
R10: 00000000004002c8 R11: 0000000000000213 R12: 000000000000b4b0
R13: 0000000000401ec0 R14: 0000000000000000 R15: 0000000000000000

Uninit was created at:
  kmsan_save_stack_with_flags mm/kmsan/kmsan.c:256 [inline]
  kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:181
  kmsan_kmalloc+0x98/0x100 mm/kmsan/kmsan_hooks.c:91
  kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan_hooks.c:100
  slab_post_alloc_hook mm/slab.h:446 [inline]
  slab_alloc_node mm/slub.c:2718 [inline]
  __kmalloc_node_track_caller+0x9e7/0x1160 mm/slub.c:4351
  __kmalloc_reserve net/core/skbuff.c:138 [inline]
  __alloc_skb+0x2f5/0x9e0 net/core/skbuff.c:206
  alloc_skb include/linux/skbuff.h:996 [inline]
  netlink_alloc_large_skb net/netlink/af_netlink.c:1189 [inline]
  netlink_sendmsg+0xb49/0x1290 net/netlink/af_netlink.c:1883
  sock_sendmsg_nosec net/socket.c:621 [inline]
  sock_sendmsg net/socket.c:631 [inline]
  ___sys_sendmsg+0xe70/0x1290 net/socket.c:2114
  __sys_sendmsg net/socket.c:2152 [inline]
  __do_sys_sendmsg net/socket.c:2161 [inline]
  __se_sys_sendmsg+0x2a3/0x3d0 net/socket.c:2159
  __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2159
  do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291
  entry_SYSCALL_64_after_hwframe+0x63/0xe7

v2:
* Make error message more specific (David)

Fixes: 090096bf ("net: generic fdb support for drivers without ndo_fdb_<op>")
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Reported-and-tested-by: syzbot+3a288d5f5530b901310e@syzkaller.appspotmail.com
Reported-and-tested-by: syzbot+d53ab4e92a1db04110ff@syzkaller.appspotmail.com
Cc: Vlad Yasevich <vyasevich@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Reviewed-by: NDavid Ahern <dsahern@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit 89ab066d ]

This reverts commit dd979b4d.

This broke tcp_poll for SMC fallback: An AF_SMC socket establishes an
internal TCP socket for the initial handshake with the remote peer.
Whenever the SMC connection can not be established this TCP socket is
used as a fallback. All socket operations on the SMC socket are then
forwarded to the TCP socket. In case of poll, the file->private_data
pointer references the SMC socket because the TCP socket has no file
assigned. This causes tcp_poll to wait on the wrong socket.
Signed-off-by: NKarsten Graul <kgraul@linux.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit db4f1be3ca9b0ef7330763d07bf4ace83ad6f913 ]

Current handling of CHECKSUM_COMPLETE packets by the UDP stack is
incorrect for any packet that has an incorrect checksum value.

udp4/6_csum_init() will both make a call to
__skb_checksum_validate_complete() to initialize/validate the csum
field when receiving a CHECKSUM_COMPLETE packet. When this packet
fails validation, skb->csum will be overwritten with the pseudoheader
checksum so the packet can be fully validated by software, but the
skb->ip_summed value will be left as CHECKSUM_COMPLETE so that way
the stack can later warn the user about their hardware spewing bad
checksums. Unfortunately, leaving the SKB in this state can cause
problems later on in the checksum calculation.

Since the the packet is still marked as CHECKSUM_COMPLETE,
udp_csum_pull_header() will SUBTRACT the checksum of the UDP header
from skb->csum instead of adding it, leaving us with a garbage value
in that field. Once we try to copy the packet to userspace in the
udp4/6_recvmsg(), we'll make a call to skb_copy_and_csum_datagram_msg()
to checksum the packet data and add it in the garbage skb->csum value
to perform our final validation check.

Since the value we're validating is not the proper checksum, it's possible
that the folded value could come out to 0, causing us not to drop the
packet. Instead, we believe that the packet was checksummed incorrectly
by hardware since skb->ip_summed is still CHECKSUM_COMPLETE, and we attempt
to warn the user with netdev_rx_csum_fault(skb->dev);

Unfortunately, since this is the UDP path, skb->dev has been overwritten
by skb->dev_scratch and is no longer a valid pointer, so we end up
reading invalid memory.

This patch addresses this problem in two ways:
	1) Do not use the dev pointer when calling netdev_rx_csum_fault()
	   from skb_copy_and_csum_datagram_msg(). Since this gets called
	   from the UDP path where skb->dev has been overwritten, we have
	   no way of knowing if the pointer is still valid. Also for the
	   sake of consistency with the other uses of
	   netdev_rx_csum_fault(), don't attempt to call it if the
	   packet was checksummed by software.

	2) Add better CHECKSUM_COMPLETE handling to udp4/6_csum_init().
	   If we receive a packet that's CHECKSUM_COMPLETE that fails
	   verification (i.e. skb->csum_valid == 0), check who performed
	   the calculation. It's possible that the checksum was done in
	   software by the network stack earlier (such as Netfilter's
	   CONNTRACK module), and if that says the checksum is bad,
	   we can drop the packet immediately instead of waiting until
	   we try and copy it to userspace. Otherwise, we need to
	   mark the SKB as CHECKSUM_NONE, since the skb->csum field
	   no longer contains the full packet checksum after the
	   call to __skb_checksum_validate_complete().

Fixes: e6afc8ac ("udp: remove headers from UDP packets before queueing")
Fixes: c84d9490 ("udp: copy skb->truesize in the first cache line")
Cc: Sam Kumar <samanthakumar@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: NSean Tranchetti <stranche@codeaurora.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit 30549aab146ccb1275230c3b4b4bc6b4181fd54e ]

When building stmmac, it is only possible to select CONFIG_DWMAC_GENERIC,
or any of the glue drivers, when CONFIG_STMMAC_PLATFORM is set.
The only exception is CONFIG_STMMAC_PCI.

When calling of_mdiobus_register(), it will call our ->reset()
callback, which is set to stmmac_mdio_reset().

Most of the code in stmmac_mdio_reset() is protected by a
"#if defined(CONFIG_STMMAC_PLATFORM)", which will evaluate
to false when CONFIG_STMMAC_PLATFORM=m.

Because of this, the phy reset gpio will only be pulled when
stmmac is built as built-in, but not when built as modules.

Fix this by using "#if IS_ENABLED()" instead of "#if defined()".
Signed-off-by: NNiklas Cassel <niklas.cassel@linaro.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit 38b4f18d56372e1e21771ab7b0357b853330186c ]

gred_change_table_def() takes a pointer to TCA_GRED_DPS attribute,
and expects it will be able to interpret its contents as
struct tc_gred_sopt.  Pass the correct gred attribute, instead of
TCA_OPTIONS.

This bug meant the table definition could never be changed after
Qdisc was initialized (unless whatever TCA_OPTIONS contained both
passed netlink validation and was a valid struct tc_gred_sopt...).

Old behaviour:
$ ip link add type dummy
$ tc qdisc replace dev dummy0 parent root handle 7: \
     gred setup vqs 4 default 0
$ tc qdisc replace dev dummy0 parent root handle 7: \
     gred setup vqs 4 default 0
RTNETLINK answers: Invalid argument

Now:
$ ip link add type dummy
$ tc qdisc replace dev dummy0 parent root handle 7: \
     gred setup vqs 4 default 0
$ tc qdisc replace dev dummy0 parent root handle 7: \
     gred setup vqs 4 default 0
$ tc qdisc replace dev dummy0 parent root handle 7: \
     gred setup vqs 4 default 0

Fixes: f62d6b93 ("[PKT_SCHED]: GRED: Use central VQ change procedure")
Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit d48051c5b8376038c2b287c3b1bd55b8d391d567 ]

As shown by Dmitris, we need to use csum_block_add() instead of csum_add()
when adding the FCS contribution to skb csum.

Before 4.18 (more exactly commit 88078d98 "net: pskb_trim_rcsum()
and CHECKSUM_COMPLETE are friends"), the whole skb csum was thrown away,
so RXFCS changes were ignored.

Then before commit d55bef50 ("net: fix pskb_trim_rcsum_slow() with
odd trim offset") both mlx5 and pskb_trim_rcsum_slow() bugs were canceling
each other.

Now we fixed pskb_trim_rcsum_slow() we need to fix mlx5.

Note that this patch also rewrites mlx5e_get_fcs() to :

- Use skb_header_pointer() instead of reinventing it.
- Use __get_unaligned_cpu32() to avoid possible non aligned accesses
  as Dmitris pointed out.

Fixes: 902a5459 ("net/mlx5e: When RXFCS is set, add FCS data into checksum calculation")
Reported-by: NPaweł Staszewski <pstaszewski@itcare.pl>
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Eran Ben Elisha <eranbe@mellanox.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Dimitris Michailidis <dmichail@google.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Paweł Staszewski <pstaszewski@itcare.pl>
Reviewed-by: NEran Ben Elisha <eranbe@mellanox.com>
Tested-By: NMaria Pasechnik <mariap@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit ee1abcf689353f36d9322231b4320926096bdee0 ]

Commit a61bbcf2 ("[NET]: Store skb->timestamp as offset to a base
timestamp") introduces a neighbour control buffer and zeroes it out in
ndisc_rcv(), as ndisc_recv_ns() uses it.

Commit f2776ff0 ("[IPV6]: Fix address/interface handling in UDP and
DCCP, according to the scoping architecture.") introduces the usage of the
IPv6 control buffer in protocol error handlers (e.g. inet6_iif() in
present-day __udp6_lib_err()).

Now, with commit b94f1c09 ("ipv6: Use icmpv6_notify() to propagate
redirect, instead of rt6_redirect()."), we call protocol error handlers
from ndisc_redirect_rcv(), after the control buffer is already stolen and
some parts are already zeroed out. This implies that inet6_iif() on this
path will always return zero.

This gives unexpected results on UDP socket lookup in __udp6_lib_err(), as
we might actually need to match sockets for a given interface.

Instead of always claiming the control buffer in ndisc_rcv(), do that only
when needed.

Fixes: b94f1c09 ("ipv6: Use icmpv6_notify() to propagate redirect, instead of rt6_redirect().")
Signed-off-by: NStefano Brivio <sbrivio@redhat.com>
Reviewed-by: NSabrina Dubroca <sd@queasysnail.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit 5a2de63fd1a59c30c02526d427bc014b98adf508 ]

Based on RFC 4541, 2.1.1.  IGMP Forwarding Rules

  The switch supporting IGMP snooping must maintain a list of
  multicast routers and the ports on which they are attached.  This
  list can be constructed in any combination of the following ways:

  a) This list should be built by the snooping switch sending
     Multicast Router Solicitation messages as described in IGMP
     Multicast Router Discovery [MRDISC].  It may also snoop
     Multicast Router Advertisement messages sent by and to other
     nodes.

  b) The arrival port for IGMP Queries (sent by multicast routers)
     where the source address is not 0.0.0.0.

We should not add the port to router list when receives query with source
0.0.0.0.
Reported-by: NYing Xu <yinxu@redhat.com>
Signed-off-by: NHangbin Liu <liuhangbin@gmail.com>
Acked-by: NNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Acked-by: NRoopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

As I introduced these files, I'm willing to be the maintainer of them as
well.
Acked-by: NChris Mason <clm@fb.com>
Acked-by: NOlof Johansson <olof@lixom.net>
Acked-by: NSteven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: NTheodore Ts'o <tytso@mit.edu>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The contact point for the kernel's Code of Conduct should now be the
Code of Conduct Committee, not the full TAB.  Change the email address
in the file to properly reflect this.
Acked-by: NChris Mason <clm@fb.com>
Acked-by: NOlof Johansson <olof@lixom.net>
Acked-by: NTheodore Ts'o <tytso@mit.edu>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

There was a blank <URL> reference for how to find the Code of Conduct
Committee.  Fix that up by pointing it to the correct kernel.org website
page location.
Acked-by: NChris Mason <clm@fb.com>
Acked-by: NOlof Johansson <olof@lixom.net>
Acked-by: NTheodore Ts'o <tytso@mit.edu>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Create a link between the Code of Conduct and the Code of Conduct
Interpretation so that people can see that they are related.
Acked-by: NChris Mason <clm@fb.com>
Acked-by: NOlof Johansson <olof@lixom.net>
Acked-by: NTheodore Ts'o <tytso@mit.edu>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

We use the term "TAB" before defining it later in the document.  Fix
that up by defining it at the first location.
Reported-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NChris Mason <clm@fb.com>
Acked-by: NOlof Johansson <olof@lixom.net>
Acked-by: NTheodore Ts'o <tytso@mit.edu>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Code of Conduct Interpretation: Add document explaining how the Code of Conduct is to be interpreted

The Contributor Covenant Code of Conduct is a general document meant to
provide a set of rules for almost any open source community.  Every
open-source community is unique and the Linux kernel is no exception.
Because of this, this document describes how we in the Linux kernel
community will interpret it.  We also do not expect this interpretation
to be static over time, and will adjust it as needed.

This document was created with the input and feedback of the TAB as well
as many current kernel maintainers.
Co-Developed-by: NThomas Gleixner <tglx@linutronix.de>
Co-Developed-by: NOlof Johansson <olof@lixom.net>
Acked-by: NAlex Deucher <alexander.deucher@amd.com>
Acked-by: NAlexei Starovoitov <ast@kernel.org>
Acked-by: NAmir Goldstein <amir73il@gmail.com>
Acked-by: NAndrew Morton <akpm@linux-foundation.org>
Acked-by: NAndy Lutomirski <luto@kernel.org>
Acked-by: NAnna-Maria Gleixner <anna-maria@linutronix.de>
Acked-by: NArd Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NBoris Brezillon <boris.brezillon@bootlin.com>
Acked-by: NBorislav Petkov <bp@kernel.org>
Acked-by: NChris Mason <clm@fb.com>
Acked-by: NChristian Lütke-Stetzkamp <christian@lkamp.de>
Acked-by: NColin Ian King <colin.king@canonical.com>
Acked-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NDan Williams <dan.j.williams@intel.com>
Acked-by: NDaniel Borkmann <daniel@iogearbox.net>
Acked-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: NDave Airlie <airlied@redhat.com>
Acked-by: NDave Hansen <dave.hansen@linux.intel.com>
Acked-by: NDavid Ahern <dsa@cumulusnetworks.com>
Acked-by: NDavid Sterba <kdave@kernel.org>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: NDominik Brodowski <linux@dominikbrodowski.de>
Acked-by: NEric Dumazet <eric.dumazet@gmail.com>
Acked-by: NFelipe Balbi <balbi@kernel.org>
Acked-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Acked-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NGregory CLEMENT <gregory.clement@bootlin.com>
Acked-by: NGuenter Roeck <linux@roeck-us.net>
Acked-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: NHans Verkuil <hverkuil@xs4all.nl>
Acked-by: NHans de Goede <j.w.r.degoede@gmail.com>
Acked-by: NHarry Wentland <harry.wentland@amd.com>
Acked-by: NHeiko Stuebner <heiko@sntech.de>
Acked-by: NIngo Molnar <mingo@kernel.org>
Acked-by: NJaegeuk Kim <jaegeuk@kernel.org>
Acked-by: NJames Smart <james.smart@broadcom.com>
Acked-by: NJames Smart <jsmart2021@gmail.com>
Acked-by: NJan Kara <jack@ucw.cz>
Acked-by: NJani Nikula <jani.nikula@intel.com>
Acked-by: NJason A. Donenfeld <Jason@zx2c4.com>
Acked-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: NJens Axboe <axboe@kernel.dk>
Acked-by: NJessica Yu <jeyu@kernel.org>
Acked-by: NJia-Ju Bai <baijiaju1990@gmail.com>
Acked-by: NJiri Kosina <jikos@kernel.org>
Acked-by: NJiri Olsa <jolsa@redhat.com>
Acked-by: NJoerg Roedel <joro@8bytes.org>
Acked-by: NJohan Hovold <johan@kernel.org>
Acked-by: NJohannes Thumshirn <jth@kernel.org>
Acked-by: NJonathan Corbet <corbet@lwn.net>
Acked-by: NJulia Lawall <julia.lawall@lip6.fr>
Acked-by: NKees Cook <keescook@chromium.org>
Acked-by: NKirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NLina Iyer <ilina@codeaurora.org>
Acked-by: NLinus Torvalds <torvalds@linux-foundation.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Acked-by: NMark Brown <broonie@kernel.org>
Acked-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: NMasami Hiramatsu <mhiramat@kernel.org>
Acked-by: NMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: NMatias Bjørling <mb@lightnvm.io>
Acked-by: NMauro Carvalho Chehab <mchehab@kernel.org>
Acked-by: NMaxime Ripard <maxime.ripard@bootlin.com>
Acked-by: NMichael Ellerman <mpe@ellerman.id.au>
Acked-by: NMike Rapoport <rppt@linux.ibm.com>
Acked-by: NMimi Zohar <zohar@linux.ibm.com>
Acked-by: NMiquel Raynal <miquel.raynal@bootlin.com>
Acked-by: NMishi Choudhary <mishi@linux.com>
Acked-by: NNikolay Borisov <n.borisov.lkml@gmail.com>
Acked-by: NOded Gabbay <oded.gabbay@gmail.com>
Acked-by: NPalmer Dabbelt <palmer@dabbelt.com>
Acked-by: NPaul E. McKenney <paulmck@linux.ibm.com>
Acked-by: NPeter Zijlstra <peterz@infradead.org>
Acked-by: NRafael J. Wysocki <rafael@kernel.org>
Acked-by: NRichard Weinberger <richard@nod.at>
Acked-by: NRik van Riel <riel@surriel.com>
Acked-by: NRob Clark <robdclark@gmail.com>
Acked-by: NRob Herring <robh@kernel.org>
Acked-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: NSean Paul <sean@poorly.run>
Acked-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: NSebastian Reichel <sre@kernel.org>
Acked-by: NSergio Paracuellos <sergio.paracuellos@gmail.com>
Acked-by: NShawn Guo <shawnguo@kernel.org>
Acked-by: NShuah Khan <shuah@kernel.org>
Acked-by: NSimon Horman <horms@verge.net.au>
Acked-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: NStephen Hemminger <stephen@networkplumber.org>
Acked-by: NTakashi Iwai <tiwai@kernel.org>
Acked-by: NTejun Heo <tj@kernel.org>
Acked-by: NTheodore Ts'o <tytso@mit.edu>
Acked-by: NThierry Reding <thierry.reding@gmail.com>
Acked-by: NTodd Poynor <toddpoynor@google.com>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Acked-by: NWei Yongjun <weiyongjun1@huawei.com>
Acked-by: NYueHaibing <yuehaibing@huawei.com>
Reviewed-by: NSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

As it was originally worded, this paragraph requires maintainers to
enforce the code of conduct, or face potential repercussions.  It sends
the wrong message, when really we just want maintainers to be part of
the solution and not violate the code of conduct themselves.

Removing it doesn't limit our ability to enforce the code of conduct,
and we can still encourage maintainers to help maintain high standards
for the level of discourse in their subsystem.
Signed-off-by: NChris Mason <clm@fb.com>
Acked-by: NAlex Deucher <alexander.deucher@amd.com>
Acked-by: NAmir Goldstein <amir73il@gmail.com>
Acked-by: NAndrew Morton <akpm@linux-foundation.org>
Acked-by: NAnna-Maria Gleixner <anna-maria@linutronix.de>
Acked-by: NArd Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NBoris Brezillon <boris.brezillon@bootlin.com>
Acked-by: NBorislav Petkov <bp@kernel.org>
Acked-by: NChristian Lütke-Stetzkamp <christian@lkamp.de>
Acked-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NColin Ian King <colin.king@canonical.com>
Acked-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NDan Williams <dan.j.williams@intel.com>
Acked-by: NDaniel Borkmann <daniel@iogearbox.net>
Acked-by: NDave Airlie <airlied@redhat.com>
Acked-by: NDave Hansen <dave.hansen@linux.intel.com>
Acked-by: NDavid Ahern <dsa@cumulusnetworks.com>
Acked-by: NDavid Sterba <kdave@kernel.org>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: NDominik Brodowski <linux@dominikbrodowski.de>
Acked-by: NEric Dumazet <eric.dumazet@gmail.com>
Acked-by: NFelipe Balbi <balbi@kernel.org>
Acked-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Acked-by: NFlorian Westphal <fw@strlen.de>
Acked-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NGregory CLEMENT <gregory.clement@bootlin.com>
Acked-by: NGuenter Roeck <linux@roeck-us.net>
Acked-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: NHans Verkuil <hverkuil@xs4all.nl>
Acked-by: NHans de Goede <j.w.r.degoede@gmail.com>
Acked-by: NHarry Wentland <harry.wentland@amd.com>
Acked-by: NHeiko Stuebner <heiko@sntech.de>
Acked-by: NIngo Molnar <mingo@kernel.org>
Acked-by: NJaegeuk Kim <jaegeuk@kernel.org>
Acked-by: NJames Smart <james.smart@broadcom.com>
Acked-by: NJames Smart <jsmart2021@gmail.com>
Acked-by: NJan Kara <jack@ucw.cz>
Acked-by: NJason A. Donenfeld <Jason@zx2c4.com>
Acked-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: NJens Axboe <axboe@kernel.dk>
Acked-by: NJessica Yu <jeyu@kernel.org>
Acked-by: NJia-Ju Bai <baijiaju1990@gmail.com>
Acked-by: NJiri Kosina <jikos@kernel.org>
Acked-by: NJiri Olsa <jolsa@redhat.com>
Acked-by: NJoerg Roedel <joro@8bytes.org>
Acked-by: NJohan Hovold <johan@kernel.org>
Acked-by: NJohannes Thumshirn <jth@kernel.org>
Acked-by: NJonathan Corbet <corbet@lwn.net>
Acked-by: NJulia Lawall <julia.lawall@lip6.fr>
Acked-by: NKees Cook <keescook@chromium.org>
Acked-by: NKirill Tkhai <ktkhai@virtuozzo.com>
Acked-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NLina Iyer <ilina@codeaurora.org>
Acked-by: NLinus Torvalds <torvalds@linux-foundation.org>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Acked-by: NMark Brown <broonie@kernel.org>
Acked-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: NMasami Hiramatsu <mhiramat@kernel.org>
Acked-by: NMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: NMatias Bjørling <mb@lightnvm.io>
Acked-by: NMaxime Ripard <maxime.ripard@bootlin.com>
Acked-by: NMichael Ellerman <mpe@ellerman.id.au>
Acked-by: NMike Rapoport <rppt@linux.ibm.com>
Acked-by: NMimi Zohar <zohar@linux.ibm.com>
Acked-by: NMiquel Raynal <miquel.raynal@bootlin.com>
Acked-by: NNikolay Borisov <n.borisov.lkml@gmail.com>
Acked-by: NOded Gabbay <oded.gabbay@gmail.com>
Acked-by: NOlof Johansson <olof@lixom.net>
Acked-by: NPalmer Dabbelt <palmer@dabbelt.com>
Acked-by: NPaul E. McKenney <paulmck@linux.ibm.com>
Acked-by: NPeter Zijlstra <peterz@infradead.org>
Acked-by: NRafael J. Wysocki <rafael@kernel.org>
Acked-by: NRichard Weinberger <richard@nod.at>
Acked-by: NRik van Riel <riel@surriel.com>
Acked-by: NRob Clark <robdclark@gmail.com>
Acked-by: NRob Herring <robh@kernel.org>
Acked-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: NSebastian Reichel <sre@kernel.org>
Acked-by: NSergio Paracuellos <sergio.paracuellos@gmail.com>
Acked-by: NShawn Guo <shawnguo@kernel.org>
Acked-by: NShuah Khan <shuah@kernel.org>
Acked-by: NSimon Horman <horms@verge.net.au>
Acked-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: NStephen Hemminger <stephen@networkplumber.org>
Acked-by: NTakashi Iwai <tiwai@kernel.org>
Acked-by: NTejun Heo <tj@kernel.org>
Acked-by: NTheodore Ts'o <tytso@mit.edu>
Acked-by: NThierry Reding <thierry.reding@gmail.com>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NTim Bird <tim.bird@sony.com>
Acked-by: NTodd Poynor <toddpoynor@google.com>
Acked-by: NTrond Myklebust <trond.myklebust@hammerspace.com>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Acked-by: NWei Yongjun <weiyongjun1@huawei.com>
Acked-by: NYueHaibing <yuehaibing@huawei.com>
Reviewed-by: NMauro Carvalho Chehab <mchehab@kernel.org>
Reviewed-by: NSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Wolfram writes:
  "i2c for 4.19

   Another driver bugfix and MAINTAINERS addition from I2C."

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: rcar: cleanup DMA for all kinds of failure
  MAINTAINERS: Add entry for Broadcom STB I2C controller

David writes:
  "Networking:

   A few straggler bug fixes:

   1) Fix indexing of multi-pass dumps of ipv6 addresses, from David
      Ahern.

   2) Revert RCU locking change for bonding netpoll, causes worse
      problems than it solves.

   3) pskb_trim_rcsum_slow() doesn't handle odd trim offsets, resulting
      in erroneous bad hw checksum triggers with CHECKSUM_COMPLETE
      devices.  From Dimitris Michailidis.

   4) a revert to some neighbour code changes that adjust notifications
      in a way that confuses some apps."

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  Revert "neighbour: force neigh_invalidate when NUD_FAILED update is from admin"
  net/ipv6: Fix index counter for unicast addresses in in6_dump_addrs
  net: fix pskb_trim_rcsum_slow() with odd trim offset
  Revert "bond: take rcu lock in netpoll_send_skb_on_dev"

This reverts commit 8e326289.

This patch results in unnecessary netlink notification when one
tries to delete a neigh entry already in NUD_FAILED state. Found
this with a buggy app that tries to delete a NUD_FAILED entry
repeatedly. While the notification issue can be fixed with more
checks, adding more complexity here seems unnecessary. Also,
recent tests with other changes in the neighbour code have
shown that the INCOMPLETE and PROBE checks are good enough for
the original issue.
Signed-off-by: NRoopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The loop wants to skip previously dumped addresses, so loops until
current index >= saved index. If the message fills it wants to save
the index for the next address to dump - ie., the one that did not
fit in the current message.

Currently, it is incrementing the index counter before comparing to the
saved index, and then the saved index is off by 1 - it assumes the
current address is going to fit in the message.

Change the index handling to increment only after a succesful dump.

Fixes: 502a2ffd ("ipv6: convert idev_list to list macros")
Signed-off-by: NDavid Ahern <dsahern@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

DMA needs to be cleaned up not only on timeout, but on all errors where
it has been setup before.

Fixes: 73e8b052 ("i2c: rcar: add DMA support")
Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Add an entry for the Broadcom STB I2C controller in the MAINTAINERS file.
Signed-off-by: NKamal Dasu <kdasu.kdev@gmail.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
[wsa: fixed sorting and a whitespace error]
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

Ingo writes:
  "x86 fixes:

   It's 4 misc fixes, 3 build warning fixes and 3 comment fixes.

   In hindsight I'd have left out the 3 comment fixes to make the pull
   request look less scary at such a late point in the cycle. :-/"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/swiotlb: Enable swiotlb for > 4GiG RAM on 32-bit kernels
  x86/fpu: Fix i486 + no387 boot crash by only saving FPU registers on context switch if there is an FPU
  x86/fpu: Remove second definition of fpu in __fpu__restore_sig()
  x86/entry/64: Further improve paranoid_entry comments
  x86/entry/32: Clear the CS high bits
  x86/boot: Add -Wno-pointer-sign to KBUILD_CFLAGS
  x86/time: Correct the attribute on jiffies' definition
  x86/entry: Add some paranoid entry/exit CR3 handling comments
  x86/percpu: Fix this_cpu_read()
  x86/tsc: Force inlining of cyc2ns bits

Ingo writes:
  "scheduler fixes:

   Two fixes: a CFS-throttling bug fix, and an interactivity fix."

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Fix the min_vruntime update logic in dequeue_entity()
  sched/fair: Fix throttle_list starvation with low CFS quota

Ingo writes:
  "perf fixes:

   Misc perf tooling fixes."

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf tools: Stop fallbacking to kallsyms for vdso symbols lookup
  perf tools: Pass build flags to traceevent build
  perf report: Don't crash on invalid inline debug information
  perf cpu_map: Align cpu map synthesized events properly.
  perf tools: Fix tracing_path_mount proper path
  perf tools: Fix use of alternatives to find JDIR
  perf evsel: Store ids for events with their own cpus perf_event__synthesize_event_update_cpus
  perf vendor events intel: Fix wrong filter_band* values for uncore events
  Revert "perf tools: Fix PMU term format max value calculation"
  tools headers uapi: Sync kvm.h copy
  tools arch uapi: Sync the x86 kvm.h copy

We've been getting checksum errors involving small UDP packets, usually
59B packets with 1 extra non-zero padding byte. netdev_rx_csum_fault()
has been complaining that HW is providing bad checksums. Turns out the
problem is in pskb_trim_rcsum_slow(), introduced in commit 88078d98
("net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends").

The source of the problem is that when the bytes we are trimming start
at an odd address, as in the case of the 1 padding byte above,
skb_checksum() returns a byte-swapped value. We cannot just combine this
with skb->csum using csum_sub(). We need to use csum_block_sub() here
that takes into account the parity of the start address and handles the
swapping.

Matches existing code in __skb_postpull_rcsum() and esp_remove_trailer().

Fixes: 88078d98 ("net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends")
Signed-off-by: NDimitris Michailidis <dmichail@google.com>
Reviewed-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>