Pull input fixes from Dmitry Torokhov:
 "Switching a few devices with Synaptics over to SMbus and disabling
  SMbus on a couple devices with Elan touchpads as they need more
  plumbing on PS/2 side"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: synaptics - enable SMBus for HP EliteBook 840 G4
  Input: elantech - disable elan-i2c for P52 and P72
  Input: synaptics - enable RMI on ThinkPad T560
  Input: omap-keypad - fix idle configuration to not block SoC idle states

Pull GPIO fixes from Linus Walleij:
 "Hopefully last round of GPIO fixes.

  The ACPI patch is pretty important for some laptop users, the rest is
  driver-specific for embedded (mostly ARM) systems.

  I took out one ACPI patch that wasn't critical enough because I
  couldn't justify sending it at this point, and that is why the commit
  date is today, but the patches have been in linux-next.

  Sorry for not sending some of them earlier :(

  Notice that we have a co-maintainer for GPIO now, Bartosz Golaszewski,
  and he might jump in and make some pull requests at times when I am
  off.

  Summary:

   - ACPI IRQ request deferral

   - OMAP: revert deferred wakeup quirk

   - MAX7301: fix DMA safe memory handling

   - MVEBU: selective probe failure on missing clk"

* tag 'gpio-v4.20-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: mvebu: only fail on missing clk if pwm is actually to be used
  gpio: max7301: fix driver for use with CONFIG_VMAP_STACK
  gpio: gpio-omap: Revert deferred wakeup quirk handling for regressions
  gpiolib-acpi: Only defer request_irq for GpioInt ACPI event handlers

Pull smb3 fix from Steve French:
 "An important smb3 fix for an regression to some servers introduced by
  compounding optimization to rmdir.

  This fix has been tested by multiple developers (including me) with
  the usual private xfstesting, but also by the new cifs/smb3 "buildbot"
  xfstest VMs (thank you Ronnie and Aurelien for good work on this
  automation). The automated testing has been updated so that it will
  catch problems like this in the future.

  Note that Pavel discovered (very recently) some unrelated but
  extremely important bugs in credit handling (smb3 flow control problem
  that can lead to disconnects/reconnects) when compounding, that I
  would have liked to send in ASAP but the complete testing of those two
  fixes may not be done in time and have to wait for 4.21"

* tag '4.20-rc7-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  smb3: Fix rmdir compounding regression to strict servers

dmesg reports that "Your touchpad (PNP: SYN3052 SYN0100 SYN0002 PNP0f13)
says it can support a different bus."

I've tested the offered psmouse.synaptics_intertouch=1 with 4.18.x and
4.19.x and it seems to work well. No problems seen with suspend/resume.

Also, it appears that RMI/SMBus mode is actually required for 3-4 finger
multitouch gestures to work -- otherwise they are not reported at all.

Information from dmesg in both modes:

  psmouse serio3: synaptics: Touchpad model: 1, fw: 8.2, id: 0x1e2b1,
      caps: 0xf00123/0x840300/0x2e800/0x0, board id: 3139, fw id: 2000742

  psmouse serio3: synaptics: Trying to set up SMBus access
  rmi4_smbus 6-002c: registering SMbus-connected sensor
  rmi4_f01 rmi4-00.fn01: found RMI device,
      manufacturer: Synaptics, product: TM3139-001, fw id: 2000742
Signed-off-by: Mantas Mikulėnas <grawity@gmail.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

The current implementation of elan_i2c is known to not support those
2 laptops.

A proper fix is to tweak both elantech and elan_i2c to transmit the
correct information from PS/2, which would make a bad candidate for
stable.

So to give us some time for fixing the root of the problem, disable
elan_i2c for the devices we know are not behaving properly.

Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1803600
Link: https://bugs.archlinux.org/task/59714
Fixes: df077237 Input: elantech - detect new ICs and setup Host Notify for them

Cc: stable@vger.kernel.org  # v4.18+
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

The gpio IP on Armada 370 at offset 0x18180 has neither a clk nor pwm
registers. So there is no need for a clk as the pwm isn't used anyhow.
So only check for the clk in the presence of the pwm registers. This fixes
a failure to probe the gpio driver for the above mentioned gpio device.

Fixes: 757642f9 ("gpio: mvebu: Add limited PWM support")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

spi_read() and spi_write() require DMA-safe memory. When
CONFIG_VMAP_STACK is selected, those functions cannot be used
with buffers on stack.

This patch replaces calls to spi_read() and spi_write() by
spi_write_then_read() which doesn't require DMA-safe buffers.

Fixes: 0c36ec31 ("gpio: gpio driver for max7301 SPI GPIO expander")
Cc: <stable@vger.kernel.org>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Commit ec0daae6 ("gpio: omap: Add level wakeup handling for omap4
based SoCs") attempted to fix omap4 GPIO wakeup handling as it was
blocking deeper SoC idle states. However this caused a regression for
GPIOs during runtime having over second long latencies for Ethernet
GPIO interrupt as reportedy by Russell King <rmk+kernel@armlinux.org.uk>.

Let's fix this issue by doing a partial revert of the breaking commit.
We still want to keep the quirk handling around as it is also used for
OMAP_GPIO_QUIRK_IDLE_REMOVE_TRIGGER.

The real fix for omap4 GPIO wakeup handling involves fixes for
omap_set_gpio_trigger() and omap_gpio_unmask_irq() and will be posted
separately. And we must keep the wakeup bit enabled during runtime
because of module doing clock autogating with autoidle configured.
Reported-by: Russell King <rmk+kernel@armlinux.org.uk>
Fixes: ec0daae6 ("gpio: omap: Add level wakeup handling for omap4
based SoCs")
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Keerthy <j-keerthy@ti.com>
Cc: Ladislav Michl <ladis@linux-mips.org>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Pull i2c fixes from Wolfram Sang:
 "I2C has a MAINTAINERS update for you, so people will be immediately
  pointed to the right person for this previously orphaned driver.

  And one of Arnd's build warning fixes for a new driver added this
  cycle"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: nvidia-gpu: mark resume function as __maybe_unused
  MAINTAINERS: add entry for i2c-axxia driver

Pull UBI/UBIFS fixes from Richard Weinberger:

 - Kconfig dependency fixes for our new auth feature

 - Fix for selecting the right compressor when creating a fs

 - Bugfix for a bug in UBIFS's O_TMPFILE implementation

 - Refcounting fixes for UBI

* tag 'upstream-4.20-rc7' of git://git.infradead.org/linux-ubifs:
  ubifs: Handle re-linking of inodes correctly while recovery
  ubi: Do not drop UBI device reference before using
  ubi: Put MTD device after it is not used
  ubifs: Fix default compression selection in ubifs
  ubifs: Fix memory leak on error condition
  ubifs: auth: Add CONFIG_KEYS dependency
  ubifs: CONFIG_UBIFS_FS_AUTHENTICATION should depend on UBIFS_FS
  ubifs: replay: Fix high stack usage

Pull m68k fix from Geert Uytterhoeven:
 "Fix memblock-related crashes"

* tag 'm68k-for-v4.20-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  m68k: Fix memblock-related crashes

Merge tag 'kbuild-fixes-v4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fix from Masahiro Yamada:
 "Fix false positive warning/error about missing library for objtool"

* tag 'kbuild-fixes-v4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: fix false positive warning/error about missing libelf

Pull char/misc driver fixes from Greg KH:
 "Here are three tiny last-minute driver fixes for 4.20-rc8 that resolve
  some reported issues, and one MAINTAINERS file update.

  All of them are related to the hyper-v subsystem, it seems people are
  actually testing and using it now, which is nice to see :)

  The fixes are:
   - uio_hv_generic: fix for opening multiple times
   - Remove PCI dependancy on hyperv drivers
   - return proper error code for an unopened channel.

  And Sasha has signed up to help out with the hyperv maintainership.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-4.20-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  Drivers: hv: vmbus: Return -EINVAL for the sys files for unopened channels
  x86, hyperv: remove PCI dependency
  MAINTAINERS: Patch monkey for the Hyper-V code
  uio_hv_generic: set callbacks on open

Pull tty/serial fix from Greg KH:
 "Here is a single fix, a revert, for the 8250 serial driver to resolve
  a reported problem.

  There was some attempted patches to fix the issue, but people are
  arguing about them, so reverting the patch to revert back to the 4.19
  and older behavior is the best thing to do at this late in the release
  cycle.

  The revert has been in linux-next with no reported issues"

* tag 'tty-4.20-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  Revert "serial: 8250: Fix clearing FIFOs in RS485 mode again"

Pull USB fixes and ids from Greg KH:
 "Here are some late xhci fixes for 4.20-rc8 as well as a few new device
  ids for the option usb-serial driver.

  The xhci fixes resolve some many-reported issues and all of these have
  been in linux-next for a while with no reported problems"

* tag 'usb-4.20-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: xhci: fix 'broken_suspend' placement in struct xchi_hcd
  xhci: Don't prevent USB2 bus suspend in state check intended for USB3 only
  USB: serial: option: add Telit LN940 series
  USB: serial: option: add Fibocom NL668 series
  USB: serial: option: add Simcom SIM7500/SIM7600 (MBIM mode)
  USB: serial: option: add GosunCn ZTE WeLink ME3630
  USB: serial: option: add HP lt4132

Pull MMC fixes from Ulf Hansson:
 "MMC core:
   - Restore code to allow BKOPS and CACHE ctrl even if no HPI support
   - Reset HPI enabled state during re-init
   - Use a default minimum timeout when enabling CACHE ctrl

  MMC host:
   - omap_hsmmc: Fix DMA API warning
   - sdhci-tegra: Fix dt parsing of SDMMC pads autocal values
   - Correct register accesses when enabling v4 mode"

* tag 'mmc-v4.20-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: core: Use a minimum 1600ms timeout when enabling CACHE ctrl
  mmc: core: Allow BKOPS and CACHE ctrl even if no HPI support
  mmc: core: Reset HPI enabled state during re-init and in case of errors
  mmc: omap_hsmmc: fix DMA API warning
  mmc: tegra: Fix for SDMMC pads autocal parsing from dt
  mmc: sdhci: Fix sdhci_do_enable_v4_mode

This reverts commit 61c6de66.

The reverted commit added page reference counting to iomap page
structures that are used to track block size < page size state. This
was supposed to align the code with page migration page accounting
assumptions, but what it has done instead is break XFS filesystems.
Every fstests run I've done on sub-page block size XFS filesystems
has since picking up this commit 2 days ago has failed with bad page
state errors such as:

# ./run_check.sh "-m rmapbt=1,reflink=1 -i sparse=1 -b size=1k" "generic/038"
....
SECTION       -- xfs
FSTYP         -- xfs (debug)
PLATFORM      -- Linux/x86_64 test1 4.20.0-rc6-dgc+
MKFS_OPTIONS  -- -f -m rmapbt=1,reflink=1 -i sparse=1 -b size=1k /dev/sdc
MOUNT_OPTIONS -- /dev/sdc /mnt/scratch

generic/038 454s ...
 run fstests generic/038 at 2018-12-20 18:43:05
 XFS (sdc): Unmounting Filesystem
 XFS (sdc): Mounting V5 Filesystem
 XFS (sdc): Ending clean mount
 BUG: Bad page state in process kswapd0  pfn:3a7fa
 page:ffffea0000ccbeb0 count:0 mapcount:0 mapping:ffff88800d9b6360 index:0x1
 flags: 0xfffffc0000000()
 raw: 000fffffc0000000 dead000000000100 dead000000000200 ffff88800d9b6360
 raw: 0000000000000001 0000000000000000 00000000ffffffff
 page dumped because: non-NULL mapping
 CPU: 0 PID: 676 Comm: kswapd0 Not tainted 4.20.0-rc6-dgc+ #915
 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.1-1 04/01/2014
 Call Trace:
  dump_stack+0x67/0x90
  bad_page.cold.116+0x8a/0xbd
  free_pcppages_bulk+0x4bf/0x6a0
  free_unref_page_list+0x10f/0x1f0
  shrink_page_list+0x49d/0xf50
  shrink_inactive_list+0x19d/0x3b0
  shrink_node_memcg.constprop.77+0x398/0x690
  ? shrink_slab.constprop.81+0x278/0x3f0
  shrink_node+0x7a/0x2f0
  kswapd+0x34b/0x6d0
  ? node_reclaim+0x240/0x240
  kthread+0x11f/0x140
  ? __kthread_bind_mask+0x60/0x60
  ret_from_fork+0x24/0x30
 Disabling lock debugging due to kernel taint
....

The failures are from anyway that frees pages and empties the
per-cpu page magazines, so it's not a predictable failure or an easy
to debug failure.

generic/038 is a reliable reproducer of this problem - it has a 9 in
10 failure rate on one of my test machines. Failure on other
machines have been at random points in fstests runs but every run
has ended up tripping this problem. Hence generic/038 was used to
bisect the failure because it was the most reliable failure.

It is too close to the 4.20 release (not to mention holidays) to
try to diagnose, fix and test the underlying cause of the problem,
so reverting the commit is the only option we have right now. The
revert has been tested against a current tot 4.20-rc7+ kernel across
multiple machines running sub-page block size XFs filesystems and
none of the bad page state failures have been seen.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Cc: Piotr Jaroszynski <pjaroszynski@nvidia.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: William Kucharski <william.kucharski@oracle.com>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Cc: Brian Foster <bfoster@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull networking fixes from David Miller:

 1) Off by one in netlink parsing of mac802154_hwsim, from Alexander
    Aring.

 2) nf_tables RCU usage fix from Taehee Yoo.

 3) Flow dissector needs nhoff and thoff clamping, from Stanislav
    Fomichev.

 4) Missing sin6_flowinfo initialization in SCTP, from Xin Long.

 5) Spectrev1 in ipmr and ip6mr, from Gustavo A. R. Silva.

 6) Fix r8169 crash when DEBUG_SHIRQ is enabled, from Heiner Kallweit.

 7) Fix SKB leak in rtlwifi, from Larry Finger.

 8) Fix state pruning in bpf verifier, from Jakub Kicinski.

 9) Don't handle completely duplicate fragments as overlapping, from
    Michal Kubecek.

10) Fix memory corruption with macb and 64-bit DMA, from Anssi Hannula.

11) Fix TCP fallback socket release in smc, from Myungho Jung.

12) gro_cells_destroy needs to napi_disable, from Lorenzo Bianconi.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (130 commits)
  rds: Fix warning.
  neighbor: NTF_PROXY is a valid ndm_flag for a dump request
  net: mvpp2: fix the phylink mode validation
  net/sched: cls_flower: Remove old entries from rhashtable
  net/tls: allocate tls context using GFP_ATOMIC
  iptunnel: make TUNNEL_FLAGS available in uapi
  gro_cell: add napi_disable in gro_cells_destroy
  lan743x: Remove MAC Reset from initialization
  net/mlx5e: Remove the false indication of software timestamping support
  net/mlx5: Typo fix in del_sw_hw_rule
  net/mlx5e: RX, Fix wrong early return in receive queue poll
  ipv6: explicitly initialize udp6_addr in udp_sock_create6()
  bnxt_en: Fix ethtool self-test loopback.
  net/rds: remove user triggered WARN_ON in rds_sendmsg
  net/rds: fix warn in rds_message_alloc_sgs
  ath10k: skip sending quiet mode cmd for WCN3990
  mac80211: free skb fraglist before freeing the skb
  nl80211: fix memory leak if validate_pae_over_nl80211() fails
  net/smc: fix TCP fallback socket release
  vxge: ensure data0 is initialized in when fetching firmware version information
  ...

>> net/rds/send.c:1109:42: warning: Using plain integer as NULL pointer

Fixes: ea010070 ("net/rds: fix warn in rds_message_alloc_sgs")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Pull virtio fix from Michael Tsirkin:
 "A last-minute fix for a test build"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio: fix test build after uio.h change

Pull NFS client bugfixes from Trond Myklebust:

 - Fix TCP socket disconnection races by ensuring we always call
   xprt_disconnect_done() after releasing the socket.

 - Fix a race when clearing both XPRT_CONNECTING and XPRT_LOCKED

 - Remove xprt_connect_status() so it does not mask errors that should
   be handled by call_connect_status()

* tag 'nfs-for-4.20-6' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  SUNRPC: Remove xprt_connect_status()
  SUNRPC: Fix a race with XPRT_CONNECTING
  SUNRPC: Fix disconnection races

Pull kvm fixes from Paolo Bonzini:

 -  One nasty use-after-free bugfix, from this merge window however

 -  A less nasty use-after-free that can only zero some words at the
    beginning of the page, and hence is not really exploitable

 -  A NULL pointer dereference

 -  A dummy implementation of an AMD chicken bit MSR that Windows uses
    for some unknown reason

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  kvm: x86: Add AMD's EX_CFG to the list of ignored MSRs
  KVM: X86: Fix NULL deref in vcpu_scan_ioapic
  KVM: Fix UAF in nested posted interrupt processing
  KVM: fix unregistering coalesced mmio zone from wrong bus

Pull dma-mapping fix from Christoph Hellwig:
 "Fix a regression in dma-direct that didn't take account the magic AMD
  memory encryption mask in the DMA address"

* tag 'dma-mapping-4.20-4' of git://git.infradead.org/users/hch/dma-mapping:
  dma-direct: do not include SME mask in the DMA supported check

When dumping proxy entries the dump request has NTF_PROXY set in
ndm_flags. strict mode checking needs to be updated to allow this
flag.

Fixes: 51183d23 ("net/neighbor: Update neigh_dump_info for strict data checking")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The mvpp2_phylink_validate() sets all modes that are supported by a
given PPv2 port. An mistake made the 10000baseT_Full mode being
advertised in some cases when a port wasn't configured to perform at
10G. This patch fixes this.

Fixes: d97c9f4a ("net: mvpp2: 1000baseX support")
Reported-by: Russell King <linux@armlinux.org.uk>
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

When replacing a rule we add the new rule to the rhashtable
but only remove the old if not in skip_sw.
This commit fix this and remove the old rule anyway.

Fixes: 35cc3cef ("net/sched: cls_flower: Reject duplicated rules also under skip_sw")
Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

create_ctx can be called from atomic context, hence use
GFP_ATOMIC instead of GFP_KERNEL.

[  395.962599] BUG: sleeping function called from invalid context at mm/slab.h:421
[  395.979896] in_atomic(): 1, irqs_disabled(): 0, pid: 16254, name: openssl
[  395.996564] 2 locks held by openssl/16254:
[  396.010492]  #0: 00000000347acb52 (sk_lock-AF_INET){+.+.}, at: do_tcp_setsockopt.isra.44+0x13b/0x9a0
[  396.029838]  #1: 000000006c9552b5 (device_spinlock){+...}, at: tls_init+0x1d/0x280
[  396.047675] CPU: 5 PID: 16254 Comm: openssl Tainted: G           O      4.20.0-rc6+ #25
[  396.066019] Hardware name: Supermicro X10SRA-F/X10SRA-F, BIOS 2.0c 09/25/2017
[  396.083537] Call Trace:
[  396.096265]  dump_stack+0x5e/0x8b
[  396.109876]  ___might_sleep+0x216/0x250
[  396.123940]  kmem_cache_alloc_trace+0x1b0/0x240
[  396.138800]  create_ctx+0x1f/0x60
[  396.152504]  tls_init+0xbd/0x280
[  396.166135]  tcp_set_ulp+0x191/0x2d0
[  396.180035]  ? tcp_set_ulp+0x2c/0x2d0
[  396.193960]  do_tcp_setsockopt.isra.44+0x148/0x9a0
[  396.209013]  __sys_setsockopt+0x7c/0xe0
[  396.223054]  __x64_sys_setsockopt+0x20/0x30
[  396.237378]  do_syscall_64+0x4a/0x180
[  396.251200]  entry_SYSCALL_64_after_hwframe+0x49/0xbe

Fixes: df9d4a17 ("net/tls: sleeping function from invalid context")
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ip l add dev tun type gretap external
ip r a 10.0.0.1 encap ip dst 192.168.152.171 id 1000 dev gretap

For gretap Key example when the command set the id but don't set the
TUNNEL_KEY flags. There is no key field in the send packet

In the lwtunnel situation, some TUNNEL_FLAGS should can be set by
userspace
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add napi_disable routine in gro_cells_destroy since starting from
commit c42858ea ("gro_cells: remove spinlock protecting receive
queues") gro_cell_poll and gro_cells_destroy can run concurrently on
napi_skbs list producing a kernel Oops if the tunnel interface is
removed while gro_cell_poll is running. The following Oops has been
triggered removing a vxlan device while the interface is receiving
traffic

[ 5628.948853] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
[ 5628.949981] PGD 0 P4D 0
[ 5628.950308] Oops: 0002 [#1] SMP PTI
[ 5628.950748] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.20.0-rc6+ #41
[ 5628.952940] RIP: 0010:gro_cell_poll+0x49/0x80
[ 5628.955615] RSP: 0018:ffffc9000004fdd8 EFLAGS: 00010202
[ 5628.956250] RAX: 0000000000000000 RBX: ffffe8ffffc08150 RCX: 0000000000000000
[ 5628.957102] RDX: 0000000000000000 RSI: ffff88802356bf00 RDI: ffffe8ffffc08150
[ 5628.957940] RBP: 0000000000000026 R08: 0000000000000000 R09: 0000000000000000
[ 5628.958803] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000040
[ 5628.959661] R13: ffffe8ffffc08100 R14: 0000000000000000 R15: 0000000000000040
[ 5628.960682] FS:  0000000000000000(0000) GS:ffff88803ea00000(0000) knlGS:0000000000000000
[ 5628.961616] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 5628.962359] CR2: 0000000000000008 CR3: 000000000221c000 CR4: 00000000000006b0
[ 5628.963188] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 5628.964034] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 5628.964871] Call Trace:
[ 5628.965179]  net_rx_action+0xf0/0x380
[ 5628.965637]  __do_softirq+0xc7/0x431
[ 5628.966510]  run_ksoftirqd+0x24/0x30
[ 5628.966957]  smpboot_thread_fn+0xc5/0x160
[ 5628.967436]  kthread+0x113/0x130
[ 5628.968283]  ret_from_fork+0x3a/0x50
[ 5628.968721] Modules linked in:
[ 5628.969099] CR2: 0000000000000008
[ 5628.969510] ---[ end trace 9d9dedc7181661fe ]---
[ 5628.970073] RIP: 0010:gro_cell_poll+0x49/0x80
[ 5628.972965] RSP: 0018:ffffc9000004fdd8 EFLAGS: 00010202
[ 5628.973611] RAX: 0000000000000000 RBX: ffffe8ffffc08150 RCX: 0000000000000000
[ 5628.974504] RDX: 0000000000000000 RSI: ffff88802356bf00 RDI: ffffe8ffffc08150
[ 5628.975462] RBP: 0000000000000026 R08: 0000000000000000 R09: 0000000000000000
[ 5628.976413] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000040
[ 5628.977375] R13: ffffe8ffffc08100 R14: 0000000000000000 R15: 0000000000000040
[ 5628.978296] FS:  0000000000000000(0000) GS:ffff88803ea00000(0000) knlGS:0000000000000000
[ 5628.979327] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 5628.980044] CR2: 0000000000000008 CR3: 000000000221c000 CR4: 00000000000006b0
[ 5628.980929] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 5628.981736] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 5628.982409] Kernel panic - not syncing: Fatal exception in interrupt
[ 5628.983307] Kernel Offset: disabled

Fixes: c42858ea ("gro_cells: remove spinlock protecting receive queues")
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The MAC Reset was noticed to erase important EEPROM settings.
It is also unnecessary since a chip wide reset was done earlier
in initialization, and that reset preserves EEPROM settings.

There for this patch removes the unnecessary MAC specific reset.
Signed-off-by: Bryan Whitehead <Bryan.Whitehead@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fixes: d3849953 ("fs: decouple READ and WRITE from the block layer ops")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

Saeed Mahameed says:

====================
mlx5-fixes-2018-12-19

Some fixes for the mlx5 driver
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

mlx5 driver falsely advertises support of software timestamping.
Fix it by removing the false indication.

Fixes: ef9814de ("net/mlx5e: Add HW timestamping (TS) support")
Signed-off-by: Alaa Hleihel <alaa@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Expression terminated with "," instead of ";", resulted in
set_fte getting bad value for modify_enable_mask field.

Fixes: bd5251db ("net/mlx5_core: Introduce flow steering destination of type counter")
Signed-off-by: Yuval Avnery <yuvalav@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

When the completion queue of the RQ is empty, do not immediately return.
If left-over decompressed CQEs (from the previous cycle) were processed,
need to go to the finalization part of the poll function.

Bug exists only when CQE compression is turned ON.

This solves the following issue:
mlx5_core 0000:82:00.1: mlx5_eq_int:544:(pid 0): CQ error on CQN 0xc08, syndrome 0x1
mlx5_core 0000:82:00.1 p4p2: mlx5e_cq_error_event: cqn=0x000c08 event=0x04

Fixes: 4b7dfc99 ("net/mlx5e: Early-return on empty completion queues")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

syzbot reported the use of uninitialized udp6_addr::sin6_scope_id.
We can just set ::sin6_scope_id to zero, as tunnels are unlikely
to use an IPv6 address that needs a scope id and there is no
interface to bind in this context.

For net-next, it looks different as we have cfg->bind_ifindex there
so we can probably call ipv6_iface_scope_id().

Same for ::sin6_flowinfo, tunnels don't use it.

Fixes: 8024e028 ("udp: Add udp_sock_create for UDP tunnels to open listener socket")
Reported-by: syzbot+c56449ed3652e6720f30@syzkaller.appspotmail.com
Cc: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The current code has 2 problems.  It assumes that the RX ring for
the loopback packet is combined with the TX ring.  This is not
true if the ethtool channels are set to non-combined mode.  The
second problem is that it won't work on 57500 chips without
adjusting the logic to get the proper completion ring (cpr) pointer.
Fix both issues by locating the proper cpr pointer through the RX
ring.

Fixes: e44758b7 ("bnxt_en: Use bnxt_cp_ring_info struct pointer as parameter for RX path.")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Shamir Rabinovitch says:

====================
WARNING in rds_message_alloc_sgs

This patch set fix google syzbot rds bug found in linux-next.
The first patch solve the syzbot issue.
The second patch fix issue mentioned by Leon Romanovsky that
drivers should not call WARN_ON as result from user input.

syzbot bug report can be foud here: https://lkml.org/lkml/2018/10/31/28

v1->v2:
- patch 1: make rds_iov_vector fields name more descriptive (Hakon)
- patch 1: fix potential mem leak in rds_rm_size if krealloc fail
  (Hakon)
v2->v3:
- patch 2: harden rds_sendmsg for invalid number of sgs (Gerd)
v3->v4
- Santosh a.b. on both patches + repost to net-dev
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

per comment from Leon in rdma mailing list
https://lkml.org/lkml/2018/10/31/312 :

Please don't forget to remove user triggered WARN_ON.
https://lwn.net/Articles/769365/
"Greg Kroah-Hartman raised the problem of core kernel API code that will
use WARN_ON_ONCE() to complain about bad usage; that will not generate
the desired result if WARN_ON_ONCE() is configured to crash the machine.
He was told that the code should just call pr_warn() instead, and that
the called function should return an error in such situations. It was
generally agreed that any WARN_ON() or WARN_ON_ONCE() calls that can be
triggered from user space need to be fixed."

in addition harden rds_sendmsg to detect and overcome issues with
invalid sg count and fail the sendmsg.
Suggested-by: Leon Romanovsky <leon@kernel.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: shamir rabinovitch <shamir.rabinovitch@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

redundant copy_from_user in rds_sendmsg system call expose rds
to issue where rds_rdma_extra_size walk the rds iovec and and
calculate the number pf pages (sgs) it need to add to the tail of
rds message and later rds_cmsg_rdma_args copy the rds iovec again
and re calculate the same number and get different result causing
WARN_ON in rds_message_alloc_sgs.

fix this by doing the copy_from_user only once per rds_sendmsg
system call.

When issue occur the below dump is seen:

WARNING: CPU: 0 PID: 19789 at net/rds/message.c:316 rds_message_alloc_sgs+0x10c/0x160 net/rds/message.c:316
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 19789 Comm: syz-executor827 Not tainted 4.19.0-next-20181030+ #101
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+0x244/0x39d lib/dump_stack.c:113
 panic+0x2ad/0x55c kernel/panic.c:188
 __warn.cold.8+0x20/0x45 kernel/panic.c:540
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969
RIP: 0010:rds_message_alloc_sgs+0x10c/0x160 net/rds/message.c:316
Code: c0 74 04 3c 03 7e 6c 44 01 ab 78 01 00 00 e8 2b 9e 35 fa 4c 89 e0 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 14 9e 35 fa <0f> 0b 31 ff 44 89 ee e8 18 9f 35 fa 45 85 ed 75 1b e8 fe 9d 35 fa
RSP: 0018:ffff8801c51b7460 EFLAGS: 00010293
RAX: ffff8801bc412080 RBX: ffff8801d7bf4040 RCX: ffffffff8749c9e6
RDX: 0000000000000000 RSI: ffffffff8749ca5c RDI: 0000000000000004
RBP: ffff8801c51b7490 R08: ffff8801bc412080 R09: ffffed003b5c5b67
R10: ffffed003b5c5b67 R11: ffff8801dae2db3b R12: 0000000000000000
R13: 000000000007165c R14: 000000000007165c R15: 0000000000000005
 rds_cmsg_rdma_args+0x82d/0x1510 net/rds/rdma.c:623
 rds_cmsg_send net/rds/send.c:971 [inline]
 rds_sendmsg+0x19a2/0x3180 net/rds/send.c:1273
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:632
 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2117
 __sys_sendmsg+0x11d/0x280 net/socket.c:2155
 __do_sys_sendmsg net/socket.c:2164 [inline]
 __se_sys_sendmsg net/socket.c:2162 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x44a859
Code: e8 dc e6 ff ff 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 6b cb fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f1d4710ada8 EFLAGS: 00000297 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 000000000044a859
RDX: 0000000000000000 RSI: 0000000020001600 RDI: 0000000000000003
RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000297 R12: 00000000006dcc2c
R13: 646e732f7665642f R14: 00007f1d4710b9c0 R15: 00000000006dcd2c
Kernel Offset: disabled
Rebooting in 86400 seconds..

Reported-by: syzbot+26de17458aeda9d305d8@syzkaller.appspotmail.com
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: shamir rabinovitch <shamir.rabinovitch@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>