commit 013c66edf207ddb78422b8b636f56c87939c9e34 upstream.

This reverts commit 392bef709659abea614abfe53cf228e7a59876a4.

Per the discussion here:

  https://lkml.kernel.org/r/201906201042.3BF5CD6@keescook

the above referenced commit breaks kernel compilation with old GCC
toolchains as well as current versions of the Gold linker.

Revert it to fix the regression and to keep the ability to compile the
kernel with these tools.

Signed-off-by: Ross Zwisler <zwisler@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Cc: <stable@vger.kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Kees Cook <keescook@chromium.org>
Cc: Johannes Hirte <johannes.hirte@datenkhaos.de>
Cc: Klaus Kusche <klaus.kusche@computerix.info>
Cc: samitolvanen@google.com
Cc: Guenter Roeck <groeck@google.com>
Link: https://lkml.kernel.org/r/20190701155208.211815-1-zwisler@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 993773d11d45c90cb1c6481c2638c3d9f092ea5b upstream.

The index to access the threads tls array is controlled by userspace
via syscall: sys_ptrace(), hence leading to a potential exploitation
of the Spectre variant 1 vulnerability.

The index can be controlled from:
        ptrace -> arch_ptrace -> do_get_thread_area.

Fix this by sanitizing the user supplied index before using it to access
the p->thread.tls_array.

Signed-off-by: Dianzhang Chen <dianzhangchen0@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: bp@alien8.de
Cc: hpa@zytor.com
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/1561524630-3642-1-git-send-email-dianzhangchen0@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 31a2fbb390fee4231281b939e1979e810f945415 upstream.

The index to access the threads ptrace_bps is controlled by userspace via
syscall: sys_ptrace(), hence leading to a potential exploitation of the
Spectre variant 1 vulnerability.

The index can be controlled from:
    ptrace -> arch_ptrace -> ptrace_get_debugreg.

Fix this by sanitizing the user supplied index before using it access
thread->ptrace_bps.

Signed-off-by: Dianzhang Chen <dianzhangchen0@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: bp@alien8.de
Cc: hpa@zytor.com
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/1561476617-3759-1-git-send-email-dianzhangchen0@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Pull MIPS fixes from Paul Burton:
 "A few more MIPS fixes:

   - Fix a silly typo in virt_addr_valid which led to completely bogus
     behavior (that happened to stop tripping up hardened usercopy
     despite being broken).

   - Fix UART parity setup on AR933x systems.

   - A build fix for non-Linux build machines.

   - Have the 'all' make target build DTBs, primarily to fit in with the
     behavior of scripts/package/builddeb.

   - Handle an execution hazard in TLB exceptions that use KScratch
     registers, which could inadvertently clobber the $1 register on
     some generally higher-end out-of-order CPUs.

   - A MAINTAINERS update to fix the path to the NAND driver for Ingenic
     systems"

* tag 'mips_fixes_5.2_2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MAINTAINERS: Correct path to moved files
  MIPS: Add missing EHB in mtc0 -> mfc0 sequence.
  MIPS: have "plain" make calls build dtbs for selected platforms
  MIPS: fix build on non-linux hosts
  MIPS: ath79: fix ar933x uart parity mode
  MIPS: Fix bounds check virt_addr_valid

Pull kvm fixes from Paolo Bonzini:
 "x86 bugfix patches and one compilation fix for ARM"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: arm64/sve: Fix vq_present() macro to yield a bool
  KVM: LAPIC: Fix pending interrupt in IRR blocked by software disable LAPIC
  KVM: nVMX: Change KVM_STATE_NESTED_EVMCS to signal vmcs12 is copied from eVMCS
  KVM: nVMX: Allow restore nested-state to enable eVMCS when vCPU in SMM
  KVM: x86: degrade WARN to pr_warn_ratelimited

The original implementation of vq_present() relied on aggressive
inlining in order for the compiler to know that the code is
correct, due to some const-casting issues.  This was causing sparse
and clang to complain, while GCC compiled cleanly.

Commit 0c529ff789bc addressed this problem, but since vq_present()
is no longer a function, there is now no implicit casting of the
returned value to the return type (bool).

In set_sve_vls(), this uncast bit value is compared against a bool,
and so may spuriously compare as unequal when both are nonzero.  As
a result, KVM may reject valid SVE vector length configurations as
invalid, and vice versa.

Fix it by forcing the returned value to a bool.

Signed-off-by: Zhang Lei <zhang.lei@jp.fujitsu.com>
Fixes: 0c529ff789bc ("KVM: arm64: Implement vq_present() as a macro")
Signed-off-by: Dave Martin <Dave.Martin@arm.com> [commit message rewrite]
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Pull ARM SoC fixes from Olof Johansson:
 "Likely our final small batch of fixes for 5.2:

   - Some fixes for USB on davinci, regressions were due to the recent
     conversion of the OCHI driver to use GPIO regulators

   - A fixup of kconfig dependencies for a TI irq controller

   - A switch of armada-38x to avoid dropped characters on uart, caused
     by switch of base inherited platform description earlier this year"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: davinci: da830-evm: fix GPIO lookup for OHCI
  ARM: davinci: omapl138-hawk: add missing regulator constraints for OHCI
  ARM: davinci: da830-evm: add missing regulator constraints for OHCI
  soc: ti: fix irq-ti-sci link error
  ARM: dts: armada-xp-98dx3236: Switch to armada-38x-uart serial node

Pull tracing fixes from Steven Rostedt:
 "This includes three fixes:

   - Fix a deadlock from a previous fix to keep module loading and
     function tracing text modifications from stepping on each other
     (this has a few patches to help document the issue in comments)

   - Fix a crash when the snapshot buffer gets out of sync with the main
     ring buffer

   - Fix a memory leak when reading the memory logs"

* tag 'trace-v5.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  ftrace/x86: Anotate text_mutex split between ftrace_arch_code_modify_post_process() and ftrace_arch_code_modify_prepare()
  tracing/snapshot: Resize spare buffer if size changed
  tracing: Fix memory leak in tracing_err_log_open()
  ftrace/x86: Add a comment to why we take text_mutex in ftrace_arch_code_modify_prepare()
  ftrace/x86: Remove possible deadlock between register_kprobe() and ftrace_run_update_code()

Pull arm64 fixes from Will Deacon:
 "Fix a build failure with the LLVM linker and a module allocation
  failure when KASLR is active:

   - Fix module allocation when running with KASLR enabled

   - Fix broken build due to bug in LLVM linker (ld.lld)"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64/efi: Mark __efistub_stext_offset as an absolute symbol explicitly
  arm64: kaslr: keep modules inside module region when KASAN is enabled

This set of patches fixes regressions introduced in v5.2 kernel when DA8xx
OHCI driver was converted over to use GPIO regulators.

* tag 'davinci-fixes-for-v5.2-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci:
  ARM: davinci: da830-evm: fix GPIO lookup for OHCI
  ARM: davinci: omapl138-hawk: add missing regulator constraints for OHCI
  ARM: davinci: da830-evm: add missing regulator constraints for OHCI
  + Linux 5.2-rc7

Signed-off-by: Olof Johansson <olof@lixom.net>