Currently objtool only collects information about relocations with
addends. In recordmcount, which we are about to merge into objtool,
some supported architectures do not use rela relocations.
Signed-off-by: Matt Helsley <mhelsley@vmware.com>
Reviewed-by: Julien Thierry <jthierry@redhat.com>
Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>

Before supporting additional relocation types rename the relevant
types and functions from "rela" to "reloc". This work be done with
the following regex:

  sed -e 's/struct rela/struct reloc/g' \
      -e 's/\([_\*]\)rela\(s\{0,1\}\)/\1reloc\2/g' \
      -e 's/tmprela\(s\{0,1\}\)/tmpreloc\1/g' \
      -e 's/relasec/relocsec/g' \
      -e 's/rela_list/reloc_list/g' \
      -e 's/rela_hash/reloc_hash/g' \
      -e 's/add_rela/add_reloc/g' \
      -e 's/rela->/reloc->/g' \
      -e '/rela[,\.]/{ s/\([^\.>]\)rela\([\.,]\)/\1reloc\2/g ; }' \
      -e 's/rela =/reloc =/g' \
      -e 's/relas =/relocs =/g' \
      -e 's/relas\[/relocs[/g' \
      -e 's/relaname =/relocname =/g' \
      -e 's/= rela\;/= reloc\;/g' \
      -e 's/= relas\;/= relocs\;/g' \
      -e 's/= relaname\;/= relocname\;/g' \
      -e 's/, rela)/, reloc)/g' \
      -e 's/\([ @]\)rela\([ "]\)/\1reloc\2/g' \
      -e 's/ rela$/ reloc/g' \
      -e 's/, relaname/, relocname/g' \
      -e 's/sec->rela/sec->reloc/g' \
      -e 's/(\(!\{0,1\}\)rela/(\1reloc/g' \
      -i \
      arch.h \
      arch/x86/decode.c  \
      check.c \
      check.h \
      elf.c \
      elf.h \
      orc_gen.c \
      special.c

Notable exceptions which complicate the regex include gelf_*
library calls and standard/expected section names which still use
"rela" because they encode the type of relocation expected. Also, keep
"rela" in the struct because it encodes a specific type of relocation
we currently expect.

It will eventually turn into a member of an anonymous union when a
susequent patch adds implicit addend, or "rel", relocation support.
Signed-off-by: Matt Helsley <mhelsley@vmware.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>

ELF doesn't require .rela section names to match the base section. Use
the section index in sh_info to find the section instead of looking it
up by name.

LLD, for example, generates a .rela section that doesn't match the base
section name when we merge sections in a linker script for a binary
compiled with -ffunction-sections.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Reviewed-by: Kees Cook <keescook@chromium.org>

If a .cold function is examined prior to it's parent, the link
to the parent/child function can be overwritten when the parent
is examined. Only update pfunc and cfunc if they were previously
nil to prevent this from happening.

This fixes an issue seen when compiling with -ffunction-sections.
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>

Objtool currently only compiles for x86 architectures. This is
fine as it presently does not support tooling for other
architectures. However, we would like to be able to convert other
kernel tools to run as objtool sub commands because they too
process ELF object files. This will allow us to convert tools
such as recordmcount to use objtool's ELF code.

Since much of recordmcount's ELF code is copy-paste code to/from
a variety of other kernel tools (look at modpost for example) this
means that if we can convert recordmcount we can convert more.

We define weak definitions for subcommand entry functions and other weak
definitions for shared functions critical to building existing
subcommands. These return 127 when the command is missing which signify
tools that do not exist on all architectures.  In this case the "check"
and "orc" tools do not exist on all architectures so we only add them
for x86. Future changes adding support for "check", to arm64 for
example, can then modify the SUBCMD_CHECK variable when building for
arm64.

Objtool is not currently wired in to KConfig to be built for other
architectures because it's not needed for those architectures and
there are no commands it supports other than those for x86. As more
command support is enabled on various architectures the necessary
KConfig changes can be made (e.g. adding "STACK_VALIDATION") to
trigger building objtool.

[ jpoimboe: remove aliases, add __weak macro, add error messages ]

Cc: Julien Thierry <jthierry@redhat.com>
Signed-off-by: Matt Helsley <mhelsley@vmware.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>

The objtool_file structure describes the files objtool works on,
is used by the check subcommand, and the check.h header is included
by the orc subcommands so it's presently used by all subcommands.

Since the structure will be useful in all subcommands besides check,
and some subcommands may not want to include check.h to get the
definition, split the structure out into a new header meant for use
by all objtool subcommands.
Signed-off-by: Matt Helsley <mhelsley@vmware.com>
Reviewed-by: Julien Thierry <jthierry@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>

When the user requests help it's not an error so do not exit with
a non-zero exit code. This is not especially useful for a user but
any script that might wish to check that objtool --help is at least
available can't rely on the exit code to crudely check that, for
example, building an objtool executable succeeds.
Signed-off-by: Matt Helsley <mhelsley@vmware.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>

check_kcov_mode() is called by write_comp_data() and
__sanitizer_cov_trace_pc(), which are already on the uaccess safe list.
It's notrace and doesn't call out to anything else, so add it to the
list too.

This fixes the following warnings:

  kernel/kcov.o: warning: objtool: __sanitizer_cov_trace_pc()+0x15: call to check_kcov_mode() with UACCESS enabled
  kernel/kcov.o: warning: objtool: write_comp_data()+0x1b: call to check_kcov_mode() with UACCESS enabled
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>

Enable objtool coverage for the sample ftrace modules by adding ELF
annotations to the asm trampoline functions.

  samples/ftrace/ftrace-direct.o: warning: objtool: .text+0x0: unreachable instruction
  samples/ftrace/ftrace-direct-modify.o: warning: objtool: .text+0x0: unreachable instruction
  samples/ftrace/ftrace-direct-too.o: warning: objtool: .text+0x0: unreachable instruction
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>

Resolve structural conflict between:

  59566b0b: ("x86/ftrace: Have ftrace trampolines turn read-only at the end of system boot up")

which introduced a new reference to 'ftrace_epilogue', and:

  0298739b: ("x86,ftrace: Fix ftrace_regs_caller() unwind")

Which renamed it to 'ftrace_caller_end'. Rename the new usage site in the merge commit.
Signed-off-by: Ingo Molnar <mingo@kernel.org>

Pull IPMI update from Corey Minyard:
 "Convert i2c_new_device() to i2c_new_client_device()

  Wolfram Sang has asked to have this included in 5.7 so the deprecated
  API can be removed next release. There should be no functional
  difference.

  I think that entire this section of code can be removed; it is
  leftover from other things that have since changed, but this is the
  safer thing to do for now. The full removal can happen next release"

* tag 'for-linus-5.7-2' of git://github.com/cminyard/linux-ipmi:
  char: ipmi: convert to use i2c_new_client_device()

Pull clk fixes from Stephen Boyd:
 "Some more clk driver fixes and one core framework fix:

   - A handful of TI driver fixes for bad of_node_put() and incorrect
     parent names

   - Rockchip rk3228 aclk_gpu* creation was interfering with lima GPU
     work so we use a composite clk now

   - Resuming from suspend on Tegra Jetson TK1 was broken because an
     audio PLL calculated an incorrect rate

   - A fix for devicetree probing on IM-PD1 by actually specifying a clk
     name which is required to pass clk registration

   - Avoid list corruption if registration fails for a critical clk"

* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
  clk: ti: clkctrl: convert subclocks to use proper names also
  clk: ti: am33xx: fix RTC clock parent
  clk: ti: clkctrl: Fix Bad of_node_put within clkctrl_get_name
  clk: tegra: Fix initial rate for pll_a on Tegra124
  clk: impd1: Look up clock-output-names
  clk: Unlink clock if failed to prepare or enable
  clk: rockchip: fix incorrect configuration of rk3228 aclk_gpu* clocks

Pull USB fixes from Greg KH:
 "Here are a number of USB fixes for 5.7-rc6

  The "largest" in here is a bunch of raw-gadget fixes and api changes
  as the driver just showed up in -rc1 and work has been done to fix up
  some uapi issues found with the original submission, before it shows
  up in a -final release.

  Other than that, a bunch of other small USB gadget fixes, xhci fixes,
  some quirks, andother tiny fixes for reported issues.

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

* tag 'usb-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (26 commits)
  USB: gadget: fix illegal array access in binding with UDC
  usb: core: hub: limit HUB_QUIRK_DISABLE_AUTOSUSPEND to USB5534B
  USB: usbfs: fix mmap dma mismatch
  usb: host: xhci-plat: keep runtime active when removing host
  usb: xhci: Fix NULL pointer dereference when enqueuing trbs from urb sg list
  usb: cdns3: gadget: make a bunch of functions static
  usb: mtu3: constify struct debugfs_reg32
  usb: gadget: udc: atmel: Make some symbols static
  usb: raw-gadget: fix null-ptr-deref when reenabling endpoints
  usb: raw-gadget: documentation updates
  usb: raw-gadget: support stalling/halting/wedging endpoints
  usb: raw-gadget: fix gadget endpoint selection
  usb: raw-gadget: improve uapi headers comments
  usb: typec: mux: intel: Fix DP_HPD_LVL bit field
  usb: raw-gadget: fix return value of ep read ioctls
  usb: dwc3: select USB_ROLE_SWITCH
  usb: gadget: legacy: fix error return code in gncm_bind()
  usb: gadget: legacy: fix error return code in cdc_bind()
  usb: gadget: legacy: fix redundant initialization warnings
  usb: gadget: tegra-xudc: Fix idle suspend/resume
  ...

Pull execve fix from Eric Biederman:
 "While working on my exec cleanups I found a bug in exec that I
  introduced by accident a couple of years ago. I apparently missed the
  fact that bprm->file can change.

  Now I have a very personal motive to clean up exec and make it more
  approachable.

  The change is just moving woud_dump to where it acts on the final
  bprm->file not the initial bprm->file. I have been careful and tested
  and verify this fix works"

* 'exec-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  exec: Move would_dump into flush_old_exec

Pull x86 stack unwinding fix from Thomas Gleixner:
 "A single bugfix for the ORC unwinder to ensure that the error flag
  which tells the unwinding code whether a stack trace can be trusted or
  not is always set correctly.

  This was messed up by a couple of changes in the recent past"

* tag 'objtool-urgent-2020-05-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/unwind/orc: Fix error handling in __unwind_start()

Pull x86 fix from Borislav Petkov:
 "A single fix for early boot crashes of kernels built with gcc10 and
  stack protector enabled"

* tag 'x86_urgent_for_v5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Fix early boot crash on gcc-10, third try

I goofed when I added mm->user_ns support to would_dump.  I missed the
fact that in the case of binfmt_loader, binfmt_em86, binfmt_misc, and
binfmt_script bprm->file is reassigned.  Which made the move of
would_dump from setup_new_exec to __do_execve_file before exec_binprm
incorrect as it can result in would_dump running on the script instead
of the interpreter of the script.

The net result is that the code stopped making unreadable interpreters
undumpable.  Which allows them to be ptraced and written to disk
without special permissions.  Oops.

The move was necessary because the call in set_new_exec was after
bprm->mm was no longer valid.

To correct this mistake move the misplaced would_dump from
__do_execve_file into flos_old_exec, before exec_mmap is called.

I tested and confirmed that without this fix I can attach with gdb to
a script with an unreadable interpreter, and with this fix I can not.

Cc: stable@vger.kernel.org
Fixes: f84df2a6 ("exec: Ensure mm->user_ns contains the execed files")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

Pull cifs fixes from Steve French:
 "Three small cifs/smb3 fixes, one for stable"

* tag '5.7-rc5-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: fix leaked reference on requeued write
  cifs: Fix null pointer check in cifs_read
  CIFS: Spelling s/EACCESS/EACCES/

Pull kvm fixes from Paolo Bonzini:
 "A new testcase for guest debugging (gdbstub) that exposed a bunch of
  bugs, mostly for AMD processors. And a few other x86 fixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: Fix off-by-one error in kvm_vcpu_ioctl_x86_setup_mce
  KVM: x86: Fix pkru save/restore when guest CR4.PKE=0, move it to x86.c
  KVM: SVM: Disable AVIC before setting V_IRQ
  KVM: Introduce kvm_make_all_cpus_request_except()
  KVM: VMX: pass correct DR6 for GD userspace exit
  KVM: x86, SVM: isolate vcpu->arch.dr6 from vmcb->save.dr6
  KVM: SVM: keep DR6 synchronized with vcpu->arch.dr6
  KVM: nSVM: trap #DB and #BP to userspace if guest debugging is on
  KVM: selftests: Add KVM_SET_GUEST_DEBUG test
  KVM: X86: Fix single-step with KVM_SET_GUEST_DEBUG
  KVM: X86: Set RTM for DB_VECTOR too for KVM_EXIT_DEBUG
  KVM: x86: fix DR6 delivery for various cases of #DB injection
  KVM: X86: Declare KVM_CAP_SET_GUEST_DEBUG properly

Pull powerpc fixes from Michael Ellerman:

 - A fix for unrecoverable SLB faults in the interrupt exit path,
   introduced by the recent rewrite of interrupt exit in C.

 - Four fixes for our KUAP (Kernel Userspace Access Prevention) support
   on 64-bit. These are all fairly minor with the exception of the
   change to evaluate the get/put_user() arguments before we enable user
   access, which reduces the amount of code we run with user access
   enabled.

 - A fix for our secure boot IMA rules, if enforcement of module
   signatures is enabled at runtime rather than build time.

 - A fix to our 32-bit VDSO clock_getres() which wasn't falling back to
   the syscall for unknown clocks.

 - A build fix for CONFIG_PPC_KUAP_DEBUG on 32-bit BookS, and another
   for 40x.

Thanks to: Christophe Leroy, Hugh Dickins, Nicholas Piggin, Aurelien
Jarno, Mimi Zohar, Nayna Jain.

* tag 'powerpc-5.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/40x: Make more space for system call exception
  powerpc/vdso32: Fallback on getres syscall when clock is unknown
  powerpc/32s: Fix build failure with CONFIG_PPC_KUAP_DEBUG
  powerpc/ima: Fix secure boot rules in ima arch policy
  powerpc/64s/kuap: Restore AMR in fast_interrupt_return
  powerpc/64s/kuap: Restore AMR in system reset exception
  powerpc/64/kuap: Move kuap checks out of MSR[RI]=0 regions of exit code
  powerpc/64s: Fix unrecoverable SLB crashes due to preemption check
  powerpc/uaccess: Evaluate macro arguments once, before user access is allowed

Pull csky updates from Guo Ren:

 - fix for copy_from/to_user (a hard-to-find bug, thx Viro)

 - fix for calltrace panic without FRAME_POINT

 - two fixes for perf

 - two build fixes

 - four fixes for non-fatal bugs (msa, rm dis_irq, cleanup psr,
   gdbmacros.txt)

* tag 'csky-for-linus-5.7-rc6' of git://github.com/c-sky/csky-linux:
  csky: Fixup raw_copy_from_user()
  csky: Fixup gdbmacros.txt with name sp in thread_struct
  csky: Fixup remove unnecessary save/restore PSR code
  csky: Fixup remove duplicate irq_disable
  csky: Fixup calltrace panic
  csky: Fixup perf callchain unwind
  csky: Fixup msa highest 3 bits mask
  csky: Fixup perf probe -x hungup
  csky: Fixup compile error for abiv1 entry.S
  csky/ftrace: Fixup error when disable CONFIG_DYNAMIC_FTRACE

Pull ARM SoC/dt fixes from Arnd Bergmann:
 "This round of fixes is almost exclusively device tree changes, with
  trivial defconfig fixes and one compiler warning fix added in.

  A number of patches are to fix dtc warnings, in particular on Amlogic,
  i.MX and Rockchips.

  Other notable changes include:

  Renesas:
   - Fix a wrong clock configuration on R-Mobile A1
   - Fix IOMMU support on R-Car V3H

  Allwinner
   - Multiple audio fixes

  Qualcomm
   - Use a safe CPU voltage on MSM8996
   - Fixes to match a late audio driver change

  Rockchip:
   - Some fixes for the newly added Pinebook Pro

  NXP i.MX:
   - Fix I2C1 pinctrl configuration for i.MX27 phytec-phycard board
   - Fix imx6dl-yapp4-ursa board Ethernet connection

  OMAP:
   - A regression fix for non-existing can device on am534x-idk
   - Fix flakey wlan on droid4 where some devices would not connect at
     all because of internal pull being used with an external pull
   - Fix occasional missed wake-up events on droid4 modem uart"

* tag 'arm-soc-fixes-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (51 commits)
  ARM: dts: iwg20d-q7-dbcm-ca: Remove unneeded properties in hdmi@39
  ARM: dts: renesas: Make hdmi encoder nodes compliant with DT bindings
  arm64: dts: renesas: Make hdmi encoder nodes compliant with DT bindings
  arm64: defconfig: add MEDIA_PLATFORM_SUPPORT
  arm64: defconfig: ARCH_R8A7795: follow changed config symbol name
  arm64: defconfig: add DRM_DISPLAY_CONNECTOR
  arm64: defconfig: DRM_DUMB_VGA_DAC: follow changed config symbol name
  ARM: oxnas: make ox820_boot_secondary static
  ARM: dts: r8a7740: Add missing extal2 to CPG node
  ARM: dts: omap4-droid4: Fix occasional lost wakeirq for uart1
  ARM: dts: omap4-droid4: Fix flakey wlan by disabling internal pull for gpio
  arm64: dts: allwinner: a64: Remove unused SPDIF sound card
  arm64: dts: allwinner: a64: pinetab: Fix cpvdd supply name
  arm64: dts: meson-g12: remove spurious blank line
  arm64: dts: meson-g12b-khadas-vim3: add missing frddr_a status property
  arm64: dts: meson-g12-common: fix dwc2 clock names
  arm64: dts: meson-g12b-ugoos-am6: fix usb vbus-supply
  arm64: dts: freescale: imx8mp: update input_val for AUDIOMIX_BIT_STREAM
  ARM: dts: r7s9210: Remove bogus clock-names from OSTM nodes
  ARM: dts: rockchip: fix pinctrl sub nodename for spi in rk322x.dtsi
  ...

Pull block fix from Jens Axboe:
 "Just a single NVMe pull in here, with a single fix for a missing DMA
  read memory barrier for completions"

* tag 'block-5.7-2020-05-16' of git://git.kernel.dk/linux-block:
  nvme-pci: dma read memory barrier for completions

Pull pin control fixes from Linus Walleij:
 "A bunch of pin control fixes, some a bit overly ripe, sorry about
  that. We have important systems like Intel laptops and Qualcomm mobile
  chips covered.

   - Pad lock register on Intel Sunrisepoint had the wrong offset

   - Fix pin config setting for the Baytrail GPIO chip

   - Fix a compilation warning in the Mediatek driver

   - Fix a function group name in the Actions driver

   - Fix a behaviour bug in the edge polarity code in the Qualcomm
     driver

   - Add a missing spinlock in the Intel Cherryview driver

   - Add affinity callbacks to the Qualcomm MSMGPIO chip"

* tag 'pinctrl-v5.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl: qcom: Add affinity callbacks to msmgpio IRQ chip
  pinctrl: cherryview: Add missing spinlock usage in chv_gpio_irq_handler
  pinctrl: qcom: fix wrong write in update_dual_edge
  pinctrl: actions: fix function group name for i2c0_group
  pinctrl: mediatek: remove shadow variable declaration
  pinctrl: baytrail: Enable pin configuration setting for GPIO chip
  pinctrl: sunrisepoint: Fix PAD lock register offset for SPT-H

Pull io_uring fixes from Jens Axboe:
 "Two small fixes that should go into this release:

   - Check and handle zero length splice (Pavel)

   - Fix a regression in this merge window for fixed files used with
     polled block IO"

* tag 'io_uring-5.7-2020-05-15' of git://git.kernel.dk/linux-block:
  io_uring: polled fixed file must go through free iteration
  io_uring: fix zero len do_splice()

Pull NVMe fix from Christoph.

* 'nvme-5.7' of git://git.infradead.org/nvme:
  nvme-pci: dma read memory barrier for completions

Merge tag 'renesas-fixes-for-v5.7-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel into arm/fixes

Renesas fixes for v5.7 (take two)

  - Fix a wrong clock configuration on R-Mobile A1,
  - Minor fixes that are fast-tracked to avoid introducing regressions
    during conversion of DT bindings to json-schema.

* tag 'renesas-fixes-for-v5.7-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel:
  ARM: dts: iwg20d-q7-dbcm-ca: Remove unneeded properties in hdmi@39
  ARM: dts: renesas: Make hdmi encoder nodes compliant with DT bindings
  arm64: dts: renesas: Make hdmi encoder nodes compliant with DT bindings
  ARM: dts: r8a7740: Add missing extal2 to CPG node

Link: https://lore.kernel.org/r/20200515125043.22811-1-geert+renesas@glider.beSigned-off-by: Arnd Bergmann <arnd@arndb.de>

Merge tag 'sunxi-fixes-for-5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux into arm/fixes

Two fixes for the Allwinner SoCs, one to remove some inexistant sound card on
the A64, and one to fix the audio codec regulator on the pinetab.

* tag 'sunxi-fixes-for-5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux:
  arm64: dts: allwinner: a64: Remove unused SPDIF sound card
  arm64: dts: allwinner: a64: pinetab: Fix cpvdd supply name

Link: https://lore.kernel.org/r/f7a98a47-316d-4b1a-b5a5-0e1e330d5f52.lettre@localhostSigned-off-by: Arnd Bergmann <arnd@arndb.de>

Pull NFS client bugfixes from Trond Myklebust:
 "Highlights include:

  Stable fixes:
   - nfs: fix NULL deference in nfs4_get_valid_delegation

  Bugfixes:
   - Fix corruption of the return value in cachefiles_read_or_alloc_pages()
   - Fix several fscache cookie issues
   - Fix a fscache queuing race that can trigger a BUG_ON
   - NFS: Fix two use-after-free regressions due to the RPC_TASK_CRED_NOREF flag
   - SUNRPC: Fix a use-after-free regression in rpc_free_client_work()
   - SUNRPC: Fix a race when tearing down the rpc client debugfs directory
   - SUNRPC: Signalled ASYNC tasks need to exit
   - NFSv3: fix rpc receive buffer size for MOUNT call"

* tag 'nfs-for-5.7-5' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFSv3: fix rpc receive buffer size for MOUNT call
  SUNRPC: 'Directory with parent 'rpc_clnt' already present!'
  NFS/pnfs: Don't use RPC_TASK_CRED_NOREF with pnfs
  NFS: Don't use RPC_TASK_CRED_NOREF with delegreturn
  SUNRPC: Signalled ASYNC tasks need to exit
  nfs: fix NULL deference in nfs4_get_valid_delegation
  SUNRPC: fix use-after-free in rpc_free_client_work()
  cachefiles: Fix race between read_waiter and read_copier involving op->to_do
  NFSv4: Fix fscache cookie aux_data to ensure change_attr is included
  NFS: Fix fscache super_cookie allocation
  NFS: Fix fscache super_cookie index_key from changing after umount
  cachefiles: Fix corruption of the return value in cachefiles_read_or_alloc_pages()

Pull networking fixes from David Miller:

 1) Fix sk_psock reference count leak on receive, from Xiyu Yang.

 2) CONFIG_HNS should be invisible, from Geert Uytterhoeven.

 3) Don't allow locking route MTUs in ipv6, RFCs actually forbid this,
    from Maciej Żenczykowski.

 4) ipv4 route redirect backoff wasn't actually enforced, from Paolo
    Abeni.

 5) Fix netprio cgroup v2 leak, from Zefan Li.

 6) Fix infinite loop on rmmod in conntrack, from Florian Westphal.

 7) Fix tcp SO_RCVLOWAT hangs, from Eric Dumazet.

 8) Various bpf probe handling fixes, from Daniel Borkmann.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (68 commits)
  selftests: mptcp: pm: rm the right tmp file
  dpaa2-eth: properly handle buffer size restrictions
  bpf: Restrict bpf_trace_printk()'s %s usage and add %pks, %pus specifier
  bpf: Add bpf_probe_read_{user, kernel}_str() to do_refine_retval_range
  bpf: Restrict bpf_probe_read{, str}() only to archs where they work
  MAINTAINERS: Mark networking drivers as Maintained.
  ipmr: Add lockdep expression to ipmr_for_each_table macro
  ipmr: Fix RCU list debugging warning
  drivers: net: hamradio: Fix suspicious RCU usage warning in bpqether.c
  net: phy: broadcom: fix BCM54XX_SHD_SCR3_TRDDAPD value for BCM54810
  tcp: fix error recovery in tcp_zerocopy_receive()
  MAINTAINERS: Add Jakub to networking drivers.
  MAINTAINERS: another add of Karsten Graul for S390 networking
  drivers: ipa: fix typos for ipa_smp2p structure doc
  pppoe: only process PADT targeted at local interfaces
  selftests/bpf: Enforce returning 0 for fentry/fexit programs
  bpf: Enforce returning 0 for fentry/fexit progs
  net: stmmac: fix num_por initialization
  security: Fix the default value of secid_to_secctx hook
  libbpf: Fix register naming in PT_REGS s390 macros
  ...

Pull rdma fixes from Jason Gunthorpe:
 "A few minor bug fixes for user visible defects, and one regression:

   - Various bugs from static checkers and syzkaller

   - Add missing error checking in mlx4

   - Prevent RTNL lock recursion in i40iw

   - Fix segfault in cxgb4 in peer abort cases

   - Fix a regression added in 5.7 where the IB_EVENT_DEVICE_FATAL could
     be lost, and wasn't delivered to all the FDs"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/uverbs: Move IB_EVENT_DEVICE_FATAL to destroy_uobj
  RDMA/uverbs: Do not discard the IB_EVENT_DEVICE_FATAL event
  RDMA/iw_cxgb4: Fix incorrect function parameters
  RDMA/core: Fix double put of resource
  IB/core: Fix potential NULL pointer dereference in pkey cache
  IB/hfi1: Fix another case where pq is left on waitlist
  IB/i40iw: Remove bogus call to netdev_master_upper_dev_get()
  IB/mlx4: Test return value of calls to ib_get_cached_pkey
  RDMA/rxe: Always return ERR_PTR from rxe_create_mmap_info()
  i40iw: Fix error handling in i40iw_manage_arp_cache()

Merge tag 'linux-kselftest-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest fixes from Shuah Khan:

 - lkdtm runner fixes to prevent dmesg clearing and shellcheck errors

 - ftrace test handling when test module doesn't exist

 - nsfs test fix to replace zero-length array with flexible-array

 - dmabuf-heaps test fix to return clear error value

* tag 'linux-kselftest-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/lkdtm: Use grep -E instead of egrep
  selftests/lkdtm: Don't clear dmesg when running tests
  selftests/ftrace: mark irqsoff_tracer.tc test as unresolved if the test module does not exist
  tools/testing: Replace zero-length array with flexible-array
  kselftests: dmabuf-heaps: Fix confused return value on expected error testing

Pull RISC-V fixes from Palmer Dabbelt:
 "A handful of build fixes, all found by Huawei's autobuilder.

  None of these patches should have any functional impact on kernels
  that build, and they're mostly related to various features
  intermingling with !MMU.

  While some of these might be better hoisted to generic code, it seems
  better to have the simple fixes in the meanwhile.

  As far as I know these are the only outstanding patches for 5.7"

* tag 'riscv-for-linus-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: mmiowb: Fix implicit declaration of function 'smp_processor_id'
  riscv: pgtable: Fix __kernel_map_pages build error if NOMMU
  riscv: Make SYS_SUPPORTS_HUGETLBFS depends on MMU
  riscv: Disable ARCH_HAS_DEBUG_VIRTUAL if NOMMU
  riscv: Add pgprot_writecombine/device and PAGE_SHARED defination if NOMMU
  riscv: stacktrace: Fix undefined reference to `walk_stackframe'
  riscv: Fix unmet direct dependencies built based on SOC_VIRT
  riscv: perf: RISCV_BASE_PMU should be independent
  riscv: perf_event: Make some funciton static

Pull arm64 fix from Catalin Marinas:
 "Fix flush_icache_range() second argument in machine_kexec() to be an
  address rather than size"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: fix the flush_icache_range arguments in machine_kexec

Alexei Starovoitov says:

====================
pull-request: bpf 2020-05-15

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

We've added 9 non-merge commits during the last 2 day(s) which contain
a total of 14 files changed, 137 insertions(+), 43 deletions(-).

The main changes are:

1) Fix secid_to_secctx LSM hook default value, from Anders.

2) Fix bug in mmap of bpf array, from Andrii.

3) Restrict bpf_probe_read to archs where they work, from Daniel.

4) Enforce returning 0 for fentry/fexit progs, from Yonghong.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Bank_num is a one-based count of banks, not a zero-based index. It
overflows the allocated space only when strictly greater than
KVM_MAX_MCE_BANKS.

Fixes: a9e38c3e ("KVM: x86: Catch potential overrun in MCE setup")
Signed-off-by: Jue Wang <juew@google.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Peter Shier <pshier@google.com>
Message-Id: <20200511225616.19557-1-jmattson@google.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

This topic branch will be included in both kvm/master and kvm/next
(for 5.8) in order to simplify testing of kvm/next.

"$err" is a variable pointing to a temp file. "$out" is not: only used
as a local variable in "check()" and representing the output of a
command line.

Fixes: eedbc685 (selftests: add PM netlink functional tests)
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

Depending on the WRIOP version, the buffer size on the RX path must by a
multiple of 64 or 256. Handle this restriction properly by aligning down
the buffer size to the necessary value. Also, use the new buffer size
dynamically computed instead of the compile time one.

Fixes: 27c87486 ("dpaa2-eth: Use a single page per Rx buffer")
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>