Pull x86 fixes from Ingo Molnar:
 "A handful of fixes: a kexec linking fix, an AMD MWAITX fix, a vmware
  guest support fix when built under Clang, and new CPU model number
  definitions"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/cpu: Add Comet Lake to the Intel CPU models header
  lib/string: Make memzero_explicit() inline instead of external
  x86/cpu/vmware: Use the full form of INL in VMWARE_PORT
  x86/asm: Fix MWAITX C-state hint value

Pull arm64 fixes from Will Deacon:
 "A larger-than-usual batch of arm64 fixes for -rc3.

  The bulk of the fixes are dealing with a bunch of issues with the
  build system from the compat vDSO, which unfortunately led to some
  significant Makefile rework to manage the horrible combinations of
  toolchains that we can end up needing to drive simultaneously.

  We came close to disabling the thing entirely, but Vincenzo was quick
  to spin up some patches and I ended up picking up most of the bits
  that were left [*]. Future work will look at disentangling the header
  files properly.

  Other than that, we have some important fixes all over, including one
  papering over the miscompilation fallout from forcing
  CONFIG_OPTIMIZE_INLINING=y, which I'm still unhappy about. Harumph.

  We've still got a couple of open issues, so I'm expecting to have some
  more fixes later this cycle.

  Summary:

   - Numerous fixes to the compat vDSO build system, especially when
     combining gcc and clang

   - Fix parsing of PAR_EL1 in spurious kernel fault detection

   - Partial workaround for Neoverse-N1 erratum #1542419

   - Fix IRQ priority masking on entry from compat syscalls

   - Fix advertisment of FRINT HWCAP to userspace

   - Attempt to workaround inlining breakage with '__always_inline'

   - Fix accidental freeing of parent SVE state on fork() error path

   - Add some missing NULL pointer checks in instruction emulation init

   - Some formatting and comment fixes"

[*] Will's final fixes were

        Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
        Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>

    but they were already in linux-next by then and he didn't rebase
    just to add those.

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (21 commits)
  arm64: armv8_deprecated: Checking return value for memory allocation
  arm64: Kconfig: Make CONFIG_COMPAT_VDSO a proper Kconfig option
  arm64: vdso32: Rename COMPATCC to CC_COMPAT
  arm64: vdso32: Pass '--target' option to clang via VDSO_CAFLAGS
  arm64: vdso32: Don't use KBUILD_CPPFLAGS unconditionally
  arm64: vdso32: Move definition of COMPATCC into vdso32/Makefile
  arm64: Default to building compat vDSO with clang when CONFIG_CC_IS_CLANG
  lib: vdso: Remove CROSS_COMPILE_COMPAT_VDSO
  arm64: vdso32: Remove jump label config option in Makefile
  arm64: vdso32: Detect binutils support for dmb ishld
  arm64: vdso: Remove stale files from old assembly implementation
  arm64: vdso32: Fix broken compat vDSO build warnings
  arm64: mm: fix spurious fault detection
  arm64: ftrace: Ensure synchronisation in PLT setup for Neoverse-N1 #1542419
  arm64: Fix incorrect irqflag restore for priority masking for compat
  arm64: mm: avoid virt_to_phys(init_mm.pgd)
  arm64: cpufeature: Effectively expose FRINT capability to userspace
  arm64: Mark functions using explicit register variables as '__always_inline'
  docs: arm64: Fix indentation and doc formatting
  arm64/sve: Fix wrong free for task->thread.sve_state
  ...

With the use of the barrier implied by barrier_data(), there is no need
for memzero_explicit() to be extern. Making it inline saves the overhead
of a function call, and allows the code to be reused in arch/*/purgatory
without having to duplicate the implementation.

Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H . Peter Anvin <hpa@zytor.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephan Mueller <smueller@chronox.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-crypto@vger.kernel.org
Cc: linux-s390@vger.kernel.org
Fixes: 906a4bb97f5d ("crypto: sha256 - Use get/put_unaligned_be32 to get input, memzero_explicit")
Link: https://lkml.kernel.org/r/20191007220000.GA408752@rani.riverdale.lan
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arm64 was the last architecture using CROSS_COMPILE_COMPAT_VDSO config
option. With this patch series the dependency in the architecture has
been removed.

Remove CROSS_COMPILE_COMPAT_VDSO from the Unified vDSO library code.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>

Pull networking fixes from David Miller:

 1) Fix ieeeu02154 atusb driver use-after-free, from Johan Hovold.

 2) Need to validate TCA_CBQ_WRROPT netlink attributes, from Eric
    Dumazet.

 3) txq null deref in mac80211, from Miaoqing Pan.

 4) ionic driver needs to select NET_DEVLINK, from Arnd Bergmann.

 5) Need to disable bh during nft_connlimit GC, from Pablo Neira Ayuso.

 6) Avoid division by zero in taprio scheduler, from Vladimir Oltean.

 7) Various xgmac fixes in stmmac driver from Jose Abreu.

 8) Avoid 64-bit division in mlx5 leading to link errors on 32-bit from
    Michal Kubecek.

 9) Fix bad VLAN check in rtl8366 DSA driver, from Linus Walleij.

10) Fix sleep while atomic in sja1105, from Vladimir Oltean.

11) Suspend/resume deadlock in stmmac, from Thierry Reding.

12) Various UDP GSO fixes from Josh Hunt.

13) Fix slab out of bounds access in tcp_zerocopy_receive(), from Eric
    Dumazet.

14) Fix OOPS in __ipv6_ifa_notify(), from David Ahern.

15) Memory leak in NFC's llcp_sock_bind, from Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (72 commits)
  selftests/net: add nettest to .gitignore
  net: qlogic: Fix memory leak in ql_alloc_large_buffers
  nfc: fix memory leak in llcp_sock_bind()
  sch_dsmark: fix potential NULL deref in dsmark_init()
  net: phy: at803x: use operating parameters from PHY-specific status
  net: phy: extract pause mode
  net: phy: extract link partner advertisement reading
  net: phy: fix write to mii-ctrl1000 register
  ipv6: Handle missing host route in __ipv6_ifa_notify
  net: phy: allow for reset line to be tied to a sleepy GPIO controller
  net: ipv4: avoid mixed n_redirects and rate_tokens usage
  r8152: Set macpassthru in reset_resume callback
  cxgb4:Fix out-of-bounds MSI-X info array access
  Revert "ipv6: Handle race in addrconf_dad_work"
  net: make sock_prot_memory_pressure() return "const char *"
  rxrpc: Fix rxrpc_recvmsg tracepoint
  qmi_wwan: add support for Cinterion CLS8 devices
  tcp: fix slab-out-of-bounds in tcp_zerocopy_receive()
  lib: textsearch: fix escapes in example code
  udp: only do GSO if # of segs > 1
  ...

Clang warns:

lib/test_user_copy.c:96:10: warning: using the result of an assignment
as a condition without parentheses [-Wparentheses]
        if (ret |= test(umem_src == NULL, "kmalloc failed"))
            ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/test_user_copy.c:96:10: note: place parentheses around the
assignment to silence this warning
        if (ret |= test(umem_src == NULL, "kmalloc failed"))
                ^
            (                                              )
lib/test_user_copy.c:96:10: note: use '!=' to turn this compound
assignment into an inequality comparison
        if (ret |= test(umem_src == NULL, "kmalloc failed"))
                ^~
                !=

Add the parentheses as it suggests because this is intentional.

Fixes: f5a1a536fa14 ("lib: introduce copy_struct_from_user() helper")
Link: https://github.com/ClangBuiltLinux/linux/issues/731
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Aleksa Sarai <cyphar@cyphar.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/20191003171121.2723619-1-natechancellor@gmail.com
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

This textsearch code example does not need the '\' escapes and they can
be misleading to someone reading the example. Also, gcc and sparse warn
that the "\%d" is an unknown escape sequence.

Fixes: 5968a70d7af5 ("textsearch: fix kernel-doc warnings and add kernel-api section")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

A common pattern for syscall extensions is increasing the size of a
struct passed from userspace, such that the zero-value of the new fields
result in the old kernel behaviour (allowing for a mix of userspace and
kernel vintages to operate on one another in most cases).

While this interface exists for communication in both directions, only
one interface is straightforward to have reasonable semantics for
(userspace passing a struct to the kernel). For kernel returns to
userspace, what the correct semantics are (whether there should be an
error if userspace is unaware of a new extension) is very
syscall-dependent and thus probably cannot be unified between syscalls
(a good example of this problem is [1]).

Previously there was no common lib/ function that implemented
the necessary extension-checking semantics (and different syscalls
implemented them slightly differently or incompletely[2]). Future
patches replace common uses of this pattern to make use of
copy_struct_from_user().

Some in-kernel selftests that insure that the handling of alignment and
various byte patterns are all handled identically to memchr_inv() usage.

[1]: commit 1251201c0d34 ("sched/core: Fix uclamp ABI bug, clean up and
     robustify sched_read_attr() ABI logic and code")

[2]: For instance {sched_setattr,perf_event_open,clone3}(2) all do do
     similar checks to copy_struct_from_user() while rt_sigprocmask(2)
     always rejects differently-sized struct arguments.

Suggested-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/20191001011055.19283-2-cyphar@cyphar.com
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Pull networking fixes from David Miller:

 1) Sanity check URB networking device parameters to avoid divide by
    zero, from Oliver Neukum.

 2) Disable global multicast filter in NCSI, otherwise LLDP and IPV6
    don't work properly. Longer term this needs a better fix tho. From
    Vijay Khemka.

 3) Small fixes to selftests (use ping when ping6 is not present, etc.)
    from David Ahern.

 4) Bring back rt_uses_gateway member of struct rtable, it's semantics
    were not well understood and trying to remove it broke things. From
    David Ahern.

 5) Move usbnet snaity checking, ignore endpoints with invalid
    wMaxPacketSize. From Bjørn Mork.

 6) Missing Kconfig deps for sja1105 driver, from Mao Wenan.

 7) Various small fixes to the mlx5 DR steering code, from Alaa Hleihel,
    Alex Vesker, and Yevgeny Kliteynik

 8) Missing CAP_NET_RAW checks in various places, from Ori Nimron.

 9) Fix crash when removing sch_cbs entry while offloading is enabled,
    from Vinicius Costa Gomes.

10) Signedness bug fixes, generally in looking at the result given by
    of_get_phy_mode() and friends. From Dan Crapenter.

11) Disable preemption around BPF_PROG_RUN() calls, from Eric Dumazet.

12) Don't create VRF ipv6 rules if ipv6 is disabled, from David Ahern.

13) Fix quantization code in tcp_bbr, from Kevin Yang.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (127 commits)
  net: tap: clean up an indentation issue
  nfp: abm: fix memory leak in nfp_abm_u32_knode_replace
  tcp: better handle TCP_USER_TIMEOUT in SYN_SENT state
  sk_buff: drop all skb extensions on free and skb scrubbing
  tcp_bbr: fix quantization code to not raise cwnd if not probing bandwidth
  mlxsw: spectrum_flower: Fail in case user specifies multiple mirror actions
  Documentation: Clarify trap's description
  mlxsw: spectrum: Clear VLAN filters during port initialization
  net: ena: clean up indentation issue
  NFC: st95hf: clean up indentation issue
  net: phy: micrel: add Asym Pause workaround for KSZ9021
  net: socionext: ave: Avoid using netdev_err() before calling register_netdev()
  ptp: correctly disable flags on old ioctls
  lib: dimlib: fix help text typos
  net: dsa: microchip: Always set regmap stride to 1
  nfp: flower: fix memory leak in nfp_flower_spawn_vnic_reprs
  nfp: flower: prevent memory leak in nfp_flower_spawn_phy_reprs
  net/sched: Set default of CONFIG_NET_TC_SKB_EXT to N
  vrf: Do not attempt to create IPv6 mcast rule if IPv6 is disabled
  net: sched: sch_sfb: don't call qdisc_put() while holding tree lock
  ...

Fix help text typos for DIMLIB.

Fixes: 4f75da3666c0 ("linux/dim: Move implementation to .c files")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Uwe Kleine-König <uwe@kleine-koenig.org>
Cc: Tal Gilboa <talgi@mellanox.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: David S. Miller <davem@davemloft.net>