Commit Graph

141284 Commits

Author SHA1 Message Date
Linus Torvalds
f6f3732162 Revert "mm: replace p??_write with pte_access_permitted in fault + gup paths"
This reverts commits 5c9d2d5c26, c7da82b894, and e7fe7b5cae.

We'll probably need to revisit this, but basically we should not
complicate the get_user_pages_fast() case, and checking the actual page
table protection key bits will require more care anyway, since the
protection keys depend on the exact state of the VM in question.

Particularly when doing a "remote" page lookup (ie in somebody elses VM,
not your own), you need to be much more careful than this was.  Dave
Hansen says:

 "So, the underlying bug here is that we now a get_user_pages_remote()
  and then go ahead and do the p*_access_permitted() checks against the
  current PKRU. This was introduced recently with the addition of the
  new p??_access_permitted() calls.

  We have checks in the VMA path for the "remote" gups and we avoid
  consulting PKRU for them. This got missed in the pkeys selftests
  because I did a ptrace read, but not a *write*. I also didn't
  explicitly test it against something where a COW needed to be done"

It's also not entirely clear that it makes sense to check the protection
key bits at this level at all.  But one possible eventual solution is to
make the get_user_pages_fast() case just abort if it sees protection key
bits set, which makes us fall back to the regular get_user_pages() case,
which then has a vma and can do the check there if we want to.

We'll see.

Somewhat related to this all: what we _do_ want to do some day is to
check the PAGE_USER bit - it should obviously always be set for user
pages, but it would be a good check to have back.  Because we have no
generic way to test for it, we lost it as part of moving over from the
architecture-specific x86 GUP implementation to the generic one in
commit e585513b76 ("x86/mm/gup: Switch GUP to the generic
get_user_page_fast() implementation").

Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: "Jérôme Glisse" <jglisse@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-12-15 18:53:22 -08:00
Linus Torvalds
7a3c296ae0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Clamp timeouts to INT_MAX in conntrack, from Jay Elliot.

 2) Fix broken UAPI for BPF_PROG_TYPE_PERF_EVENT, from Hendrik
    Brueckner.

 3) Fix locking in ieee80211_sta_tear_down_BA_sessions, from Johannes
    Berg.

 4) Add missing barriers to ptr_ring, from Michael S. Tsirkin.

 5) Don't advertise gigabit in sh_eth when not available, from Thomas
    Petazzoni.

 6) Check network namespace when delivering to netlink taps, from Kevin
    Cernekee.

 7) Kill a race in raw_sendmsg(), from Mohamed Ghannam.

 8) Use correct address in TCP md5 lookups when replying to an incoming
    segment, from Christoph Paasch.

 9) Add schedule points to BPF map alloc/free, from Eric Dumazet.

10) Don't allow silly mtu values to be used in ipv4/ipv6 multicast, also
    from Eric Dumazet.

11) Fix SKB leak in tipc, from Jon Maloy.

12) Disable MAC learning on OVS ports of mlxsw, from Yuval Mintz.

13) SKB leak fix in skB_complete_tx_timestamp(), from Willem de Bruijn.

14) Add some new qmi_wwan device IDs, from Daniele Palmas.

15) Fix static key imbalance in ingress qdisc, from Jiri Pirko.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (76 commits)
  net: qcom/emac: Reduce timeout for mdio read/write
  net: sched: fix static key imbalance in case of ingress/clsact_init error
  net: sched: fix clsact init error path
  ip_gre: fix wrong return value of erspan_rcv
  net: usb: qmi_wwan: add Telit ME910 PID 0x1101 support
  pkt_sched: Remove TC_RED_OFFLOADED from uapi
  net: sched: Move to new offload indication in RED
  net: sched: Add TCA_HW_OFFLOAD
  net: aquantia: Increment driver version
  net: aquantia: Fix typo in ethtool statistics names
  net: aquantia: Update hw counters on hw init
  net: aquantia: Improve link state and statistics check interval callback
  net: aquantia: Fill in multicast counter in ndev stats from hardware
  net: aquantia: Fill ndev stat couters from hardware
  net: aquantia: Extend stat counters to 64bit values
  net: aquantia: Fix hardware DMA stream overload on large MRRS
  net: aquantia: Fix actual speed capabilities reporting
  sock: free skb in skb_complete_tx_timestamp on error
  s390/qeth: update takeover IPs after configuration change
  s390/qeth: lock IP table while applying takeover changes
  ...
2017-12-15 13:08:37 -08:00
Linus Torvalds
06f976ecc7 arm64 fixes:
- Fix FPSIMD context switch regression introduced in -rc2
 
 - Fix ABI break with SVE CPUID register reporting
 
 - Fix use of uninitialised variable
 
 - Fixes to hardware access/dirty management and sanity checking
 
 - CPU erratum workaround for Falkor CPUs
 
 - Fix reporting of writeable+executable mappings
 
 - Fix signal reporting for RAS errors
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "There are some significant fixes in here for FP state corruption,
  hardware access/dirty PTE corruption and an erratum workaround for the
  Falkor CPU.

  I'm hoping that things finally settle down now, but never say never...

  Summary:

   - Fix FPSIMD context switch regression introduced in -rc2

   - Fix ABI break with SVE CPUID register reporting

   - Fix use of uninitialised variable

   - Fixes to hardware access/dirty management and sanity checking

   - CPU erratum workaround for Falkor CPUs

   - Fix reporting of writeable+executable mappings

   - Fix signal reporting for RAS errors"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: fpsimd: Fix copying of FP state from signal frame into task struct
  arm64/sve: Report SVE to userspace via CPUID only if supported
  arm64: fix CONFIG_DEBUG_WX address reporting
  arm64: fault: avoid send SIGBUS two times
  arm64: hw_breakpoint: Use linux/uaccess.h instead of asm/uaccess.h
  arm64: Add software workaround for Falkor erratum 1041
  arm64: Define cputype macros for Falkor CPU
  arm64: mm: Fix false positives in set_pte_at access/dirty race detection
  arm64: mm: Fix pte_mkclean, pte_mkdirty semantics
  arm64: Initialise high_memory global variable earlier
2017-12-15 12:44:49 -08:00
Linus Torvalds
e53000b1ed Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
 "Misc fixes:

   - fix the s2ram regression related to confusion around segment
     register restoration, plus related cleanups that make the code more
     robust

   - a guess-unwinder Kconfig dependency fix

   - an isoimage build target fix for certain tool chain combinations

   - instruction decoder opcode map fixes+updates, and the syncing of
     the kernel decoder headers to the objtool headers

   - a kmmio tracing fix

   - two 5-level paging related fixes

   - a topology enumeration fix on certain SMP systems"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  objtool: Resync objtool's instruction decoder source code copy with the kernel's latest version
  x86/decoder: Fix and update the opcodes map
  x86/power: Make restore_processor_context() sane
  x86/power/32: Move SYSENTER MSR restoration to fix_processor_context()
  x86/power/64: Use struct desc_ptr for the IDT in struct saved_context
  x86/unwinder/guess: Prevent using CONFIG_UNWINDER_GUESS=y with CONFIG_STACKDEPOT=y
  x86/build: Don't verify mtools configuration file for isoimage
  x86/mm/kmmio: Fix mmiotrace for page unaligned addresses
  x86/boot/compressed/64: Print error if 5-level paging is not supported
  x86/boot/compressed/64: Detect and handle 5-level paging at boot-time
  x86/smpboot: Do not use smp_num_siblings in __max_logical_packages calculation
2017-12-15 12:14:33 -08:00
Linus Torvalds
bde6b37e49 xen: fixes for 4.15-rc4
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Merge tag 'for-linus-4.15-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:
 "Two minor fixes for running as Xen dom0:

   - when built as 32 bit kernel on large machines the Xen LAPIC
     emulation should report a rather modern LAPIC in order to support
     enough APIC-Ids

   - The Xen LAPIC emulation is needed for dom0 only, so build it only
     for kernels supporting to run as Xen dom0"

* tag 'for-linus-4.15-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: XEN_ACPI_PROCESSOR is Dom0-only
  x86/Xen: don't report ancient LAPIC version
2017-12-15 11:32:09 -08:00
Will Deacon
a454483137 arm64: fpsimd: Fix copying of FP state from signal frame into task struct
Commit 9de52a755c ("arm64: fpsimd: Fix failure to restore FPSIMD
state after signals") fixed an issue reported in our FPSIMD signal
restore code but inadvertently introduced another issue which tends to
manifest as random SEGVs in userspace.

The problem is that when we copy the struct fpsimd_state from the kernel
stack (populated from the signal frame) into the struct held in the
current thread_struct, we blindly copy uninitialised stack into the
"cpu" field, which means that context-switching of the FP registers is
no longer reliable.

This patch fixes the problem by copying only the user_fpsimd member of
struct fpsimd_state. We should really rework the function prototypes
to take struct user_fpsimd_state * instead, but let's just get this
fixed for now.

Cc: Dave Martin <Dave.Martin@arm.com>
Fixes: 9de52a755c ("arm64: fpsimd: Fix failure to restore FPSIMD state after signals")
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-15 16:12:35 +00:00
Randy Dunlap
f5b5fab178 x86/decoder: Fix and update the opcodes map
Update x86-opcode-map.txt based on the October 2017 Intel SDM publication.
Fix INVPID to INVVPID.
Add UD0 and UD1 instruction opcodes.

Also sync the objtool and perf tooling copies of this file.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <masami.hiramatsu@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/aac062d7-c0f6-96e3-5c92-ed299e2bd3da@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-15 13:45:20 +01:00
Andy Lutomirski
7ee18d6779 x86/power: Make restore_processor_context() sane
My previous attempt to fix a couple of bugs in __restore_processor_context():

  5b06bbcfc2 ("x86/power: Fix some ordering bugs in __restore_processor_context()")

... introduced yet another bug, breaking suspend-resume.

Rather than trying to come up with a minimal fix, let's try to clean it up
for real.  This patch fixes quite a few things:

 - The old code saved a nonsensical subset of segment registers.
   The only registers that need to be saved are those that contain
   userspace state or those that can't be trivially restored without
   percpu access working.  (On x86_32, we can restore percpu access
   by writing __KERNEL_PERCPU to %fs.  On x86_64, it's easier to
   save and restore the kernel's GSBASE.)  With this patch, we
   restore hardcoded values to the kernel state where applicable and
   explicitly restore the user state after fixing all the descriptor
   tables.

 - We used to use an unholy mix of inline asm and C helpers for
   segment register access.  Let's get rid of the inline asm.

This fixes the reported s2ram hangs and make the code all around
more logical.

Analyzed-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reported-by: Pavel Machek <pavel@ucw.cz>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Tested-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Zhang Rui <rui.zhang@intel.com>
Fixes: 5b06bbcfc2 ("x86/power: Fix some ordering bugs in __restore_processor_context()")
Link: http://lkml.kernel.org/r/398ee68e5c0f766425a7b746becfc810840770ff.1513286253.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-15 12:21:38 +01:00
Andy Lutomirski
896c80bef4 x86/power/32: Move SYSENTER MSR restoration to fix_processor_context()
x86_64 restores system call MSRs in fix_processor_context(), and
x86_32 restored them along with segment registers.  The 64-bit
variant makes more sense, so move the 32-bit code to match the
64-bit code.

No side effects are expected to runtime behavior.

Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Zhang Rui <rui.zhang@intel.com>
Link: http://lkml.kernel.org/r/65158f8d7ee64dd6bbc6c1c83b3b34aaa854e3ae.1513286253.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-15 12:18:29 +01:00
Andy Lutomirski
090edbe23f x86/power/64: Use struct desc_ptr for the IDT in struct saved_context
x86_64's saved_context nonsensically used separate idt_limit and
idt_base fields and then cast &idt_limit to struct desc_ptr *.

This was correct (with -fno-strict-aliasing), but it's confusing,
served no purpose, and required #ifdeffery. Simplify this by
using struct desc_ptr directly.

No change in functionality.

Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Zhang Rui <rui.zhang@intel.com>
Link: http://lkml.kernel.org/r/967909ce38d341b01d45eff53e278e2728a3a93a.1513286253.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-15 12:18:29 +01:00
Linus Torvalds
c4f988ee51 pci-v4.15-fixes-1
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Merge tag 'pci-v4.15-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:

 - add a pci_get_domain_bus_and_slot() stub for the CONFIG_PCI=n case to
   avoid build breakage in the v4.16 merge window if a
   pci_get_bus_and_slot() -> pci_get_domain_bus_and_slot() patch gets
   merged before the PCI tree (Randy Dunlap)

 - fix an AMD boot regression in the 64bit BAR support added in v4.15
   (Christian König)

 - fix an R-Car use-after-free that causes a crash if no PCIe card is
   present (Geert Uytterhoeven)

* tag 'pci-v4.15-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: rcar: Fix use-after-free in probe error path
  x86/PCI: Only enable a 64bit BAR on single-socket AMD Family 15h
  x86/PCI: Fix infinite loop in search for 64bit BAR placement
  PCI: Add pci_get_domain_bus_and_slot() stub
2017-12-14 17:02:39 -08:00
Thiago Rafael Becker
bdcf0a423e kernel: make groups_sort calling a responsibility group_info allocators
In testing, we found that nfsd threads may call set_groups in parallel
for the same entry cached in auth.unix.gid, racing in the call of
groups_sort, corrupting the groups for that entry and leading to
permission denials for the client.

This patch:
 - Make groups_sort globally visible.
 - Move the call to groups_sort to the modifiers of group_info
 - Remove the call to groups_sort from set_groups

Link: http://lkml.kernel.org/r/20171211151420.18655-1-thiago.becker@gmail.com
Signed-off-by: Thiago Rafael Becker <thiago.becker@gmail.com>
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
Reviewed-by: NeilBrown <neilb@suse.com>
Acked-by: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-12-14 16:00:49 -08:00
Dave Martin
3fab39997a arm64/sve: Report SVE to userspace via CPUID only if supported
Currently, the SVE field in ID_AA64PFR0_EL1 is visible
unconditionally to userspace via the CPU ID register emulation,
irrespective of the kernel config.  This means that if a kernel
configured with CONFIG_ARM64_SVE=n is run on SVE-capable hardware,
userspace will see SVE reported as present in the ID regs even
though the kernel forbids execution of SVE instructions.

This patch makes the exposure of the SVE field in ID_AA64PFR0_EL1
conditional on CONFIG_ARM64_SVE=y.

Since future architecture features are likely to encounter a
similar requirement, this patch adds a suitable helper macros for
use when declaring config-conditional ID register fields.

Fixes: 43994d824e ("arm64/sve: Detect SVE and activate runtime support")
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Cc: Suzuki Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-14 15:14:30 +00:00
Mark Rutland
1d08a044cf arm64: fix CONFIG_DEBUG_WX address reporting
In ptdump_check_wx(), we pass walk_pgd() a start address of 0 (rather
than VA_START) for the init_mm. This means that any reported W&X
addresses are offset by VA_START, which is clearly wrong and can make
them appear like userspace addresses.

Fix this by telling the ptdump code that we're walking init_mm starting
at VA_START. We don't need to update the addr_markers, since these are
still valid bounds regardless.

Cc: <stable@vger.kernel.org>
Fixes: 1404d6f13e ("arm64: dump: Add checking for writable and exectuable pages")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Laura Abbott <labbott@redhat.com>
Reported-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-14 10:18:23 +00:00
Linus Torvalds
4e746cf4f7 RISC-V Fixes for 4.15-rc4
This pull request contains three small fixes that I'm hoping to get into
 4.15-rc4:
 
 * A fix to a typo in sys_riscv_flush_icache.  This only effects error
   handling, but I think it's a small and obvious enough change that it's
   sane outside the merge window.
 * The addition of smp_mb__after_spinlock(), which was recently removed
   due to an incorrect comment.  This is largly a comment change (as
   there's a big one now), and while it's necessary for complience with
   the RISC-V memory model the lack of this fence shouldn't manifest as a
   bug on current implementations.  Nonetheless, it still seems saner to
   have the fence in 4.15.
 * The removal of some of the HVC_RISCV_SBI driver that snuck into the
   arch port.  This is compile-time dead code in 4.15 (as the driver
   isn't in yet), and during the review process we found a better way to
   implement early printk on RISC-V.  While this change doesn't do
   anything, it will make staging our HVC driver easier: without this
   change the HVC driver we hope to upstream won't build on 4.15 (because
   the 4.15 arch code would reference a function that no longer exists).
 
 Additionally, I'm instituting a bit of a process change so I don't
 submit things too quickly again:
 
 * All the patches I submit during an RC will be from the week before, so
   everyone has gotten a chance to see them and they've made it through
   our autobuilders and integration trees.
 * I'll cherry-pick (single patches) or merge (if it's a patch set) on
   top of the new RC on Monday morning.
 * I'll sign the tag on Monday morning, to let the autobuilders pick up
   exactly what I'm submitting.
 * Assuming nothing goes wrong, I'll mail the pull request out on
   Wednesday.  If something goes wrong, I'll wait at least a day after
   re-spinning the tag to let the autobuilders pick things up.
 
 Hopefully this will avoid any headaches in the future, barring any
 emergency fixes.
 
 I don't think this is the last patch set we'll want for 4.15: I think
 I'll want to remove some of the first-level irqchip driver that snuck in
 as well, which will look a lot like the HVC patch here.  This is pending
 some asm-generic cleanup I'm doing that I haven't quite gotten clean
 enough to send out yet, though, but hopefully it'll be ready by next
 week (and still OK for that late).
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Merge tag 'riscv-for-linus-4.15-rc4-riscv_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/linux

Pull RISC-V fixes from Palmer Dabbelt:
 "This contains three small fixes:

   - A fix to a typo in sys_riscv_flush_icache. This only effects error
     handling, but I think it's a small and obvious enough change that
     it's sane outside the merge window.

   - The addition of smp_mb__after_spinlock(), which was recently
     removed due to an incorrect comment. This is largly a comment
     change (as there's a big one now), and while it's necessary for
     complience with the RISC-V memory model the lack of this fence
     shouldn't manifest as a bug on current implementations.
     Nonetheless, it still seems saner to have the fence in 4.15.

   - The removal of some of the HVC_RISCV_SBI driver that snuck into the
     arch port. This is compile-time dead code in 4.15 (as the driver
     isn't in yet), and during the review process we found a better way
     to implement early printk on RISC-V. While this change doesn't do
     anything, it will make staging our HVC driver easier: without this
     change the HVC driver we hope to upstream won't build on 4.15
     (because the 4.15 arch code would reference a function that no
     longer exists).

  I don't think this is the last patch set we'll want for 4.15: I think
  I'll want to remove some of the first-level irqchip driver that snuck
  in as well, which will look a lot like the HVC patch here. This is
  pending some asm-generic cleanup I'm doing that I haven't quite gotten
  clean enough to send out yet, though, but hopefully it'll be ready by
  next week (and still OK for that late)"

 * tag 'riscv-for-linus-4.15-rc4-riscv_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/linux:
  RISC-V: Remove unused CONFIG_HVC_RISCV_SBI code
  RISC-V: Resurrect smp_mb__after_spinlock()
  RISC-V: Logical vs Bitwise typo
2017-12-13 20:13:05 -08:00
David S. Miller
8c8f67a46f Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Daniel Borkmann says:

====================
pull-request: bpf 2017-12-13

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

The main changes are:

1) Addition of explicit scheduling points to map alloc/free
   in order to avoid having to hold the CPU for too long,
   from Eric.

2) Fixing of a corruption in overlapping perf_event_output
   calls from different BPF prog types on the same CPU out
   of different contexts, from Daniel.

3) Fallout fixes for recent correction of broken uapi for
   BPF_PROG_TYPE_PERF_EVENT. um had a missing asm header
   that needed to be pulled in from asm-generic and for
   BPF selftests the asm-generic include did not work,
   so similar asm include scheme was adapted for that
   problematic header that perf is having with other
   header files under tools, from Daniel.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-12-13 17:30:04 -05:00
Russell King
cd8165c3d5 ARM: dts: vf610-zii-dev: use XAUI for DSA link ports
Use XAUI rather than XGMII for DSA link ports, as this is the interface
mode that the switches actually use. XAUI is the 4 lane bus with clock
per direction, whereas XGMII is a 32 bit bus with clock.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-12-13 14:59:15 -05:00
Dongjiu Geng
faa75e147b arm64: fault: avoid send SIGBUS two times
do_sea() calls arm64_notify_die() which will always signal
user-space. It also returns whether APEI claimed the external
abort as a RAS notification. If it returns failure do_mem_abort()
will signal user-space too.

do_mem_abort() wants to know if we handled the error, we always
call arm64_notify_die() so can always return success.

Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
Reviewed-by: James Morse <james.morse@arm.com>
Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-13 09:58:13 +00:00
Daniel Borkmann
a23f06f06d bpf: fix build issues on um due to mising bpf_perf_event.h
Since c895f6f703 ("bpf: correct broken uapi for
BPF_PROG_TYPE_PERF_EVENT program type") um (uml) won't build
on i386 or x86_64:

  [...]
    CC      init/main.o
  In file included from ../include/linux/perf_event.h:18:0,
                   from ../include/linux/trace_events.h:10,
                   from ../include/trace/syscall.h:7,
                   from ../include/linux/syscalls.h:82,
                   from ../init/main.c:20:
  ../include/uapi/linux/bpf_perf_event.h:11:32: fatal error:
  asm/bpf_perf_event.h: No such file or directory #include
  <asm/bpf_perf_event.h>
  [...]

Lets add missing bpf_perf_event.h also to um arch. This seems
to be the only one still missing.

Fixes: c895f6f703 ("bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Suggested-by: Richard Weinberger <richard@sigma-star.at>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Richard Weinberger <richard@sigma-star.at>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2017-12-12 09:51:12 -08:00
Jan Beulich
0f3922a9b9 x86/Xen: don't report ancient LAPIC version
Unconditionally reporting a value seen on the P4 or older invokes
functionality like io_apic_get_unique_id() on 32-bit builds, resulting
in a panic() with sufficiently many CPUs and/or IO-APICs. Doing what
that function does would be the hypervisor's responsibility anyway, so
makes no sense to be used when running on Xen. Uniformly report a more
modern version; this shouldn't matter much as both LAPIC and IO-APIC are
being managed entirely / mostly by the hypervisor.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2017-12-12 09:39:17 -05:00
Will Deacon
0e17cada2a arm64: hw_breakpoint: Use linux/uaccess.h instead of asm/uaccess.h
The only inclusion of asm/uaccess.h should be by linux/uaccess.h. All
other headers should use the latter.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-12 11:53:26 +00:00
Shanker Donthineni
932b50c7c1 arm64: Add software workaround for Falkor erratum 1041
The ARM architecture defines the memory locations that are permitted
to be accessed as the result of a speculative instruction fetch from
an exception level for which all stages of translation are disabled.
Specifically, the core is permitted to speculatively fetch from the
4KB region containing the current program counter 4K and next 4K.

When translation is changed from enabled to disabled for the running
exception level (SCTLR_ELn[M] changed from a value of 1 to 0), the
Falkor core may errantly speculatively access memory locations outside
of the 4KB region permitted by the architecture. The errant memory
access may lead to one of the following unexpected behaviors.

1) A System Error Interrupt (SEI) being raised by the Falkor core due
   to the errant memory access attempting to access a region of memory
   that is protected by a slave-side memory protection unit.
2) Unpredictable device behavior due to a speculative read from device
   memory. This behavior may only occur if the instruction cache is
   disabled prior to or coincident with translation being changed from
   enabled to disabled.

The conditions leading to this erratum will not occur when either of the
following occur:
 1) A higher exception level disables translation of a lower exception level
   (e.g. EL2 changing SCTLR_EL1[M] from a value of 1 to 0).
 2) An exception level disabling its stage-1 translation if its stage-2
    translation is enabled (e.g. EL1 changing SCTLR_EL1[M] from a value of 1
    to 0 when HCR_EL2[VM] has a value of 1).

To avoid the errant behavior, software must execute an ISB immediately
prior to executing the MSR that will change SCTLR_ELn[M] from 1 to 0.

Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-12 11:45:19 +00:00
Shanker Donthineni
c622cc013c arm64: Define cputype macros for Falkor CPU
Add cputype definition macros for Qualcomm Datacenter Technologies
Falkor CPU in cputype.h. It's unfortunate that the first revision
of the Falkor CPU used the wrong part number 0x800, got fixed in v2
chip with part number 0xC00, and would be used the same value for
future revisions.

Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-12 11:45:19 +00:00
Will Deacon
86c9e8126e arm64: mm: Fix false positives in set_pte_at access/dirty race detection
Jiankang reports that our race detection in set_pte_at is firing when
copying the page tables in dup_mmap as a result of a fork(). In this
situation, the page table isn't actually live and so there is no way
that we can race with a concurrent update from the hardware page table
walker.

This patch reworks the race detection so that we require either the
mm to match the current active_mm (i.e. currently installed in our TTBR0)
or the mm_users count to be greater than 1, implying that the page table
could be live in another CPU. The mm_users check might still be racy,
but we'll avoid false positives and it's not realistic to validate that
all the necessary locks are held as part of this assertion.

Cc: Yisheng Xie <xieyisheng1@huawei.com>
Reported-by: Jiankang Chen <chenjiankang1@huawei.com>
Tested-by: Jiankang Chen <chenjiankang1@huawei.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-12 11:42:24 +00:00
Linus Torvalds
916b20e02e Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
 "This push fixes the following issues:

   - buffer overread in RSA

   - potential use after free in algif_aead.

   - error path null pointer dereference in af_alg

   - forbid combinations such as hmac(hmac(sha3)) which may crash

   - crash in salsa20 due to incorrect API usage"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: salsa20 - fix blkcipher_walk API usage
  crypto: hmac - require that the underlying hash algorithm is unkeyed
  crypto: af_alg - fix NULL pointer dereference in
  crypto: algif_aead - fix reference counting of null skcipher
  crypto: rsa - fix buffer overread when stripping leading zeroes
2017-12-11 16:32:45 -08:00
Andrey Ryabinin
0a373d4fc2 x86/unwinder/guess: Prevent using CONFIG_UNWINDER_GUESS=y with CONFIG_STACKDEPOT=y
Stackdepot doesn't work well with CONFIG_UNWINDER_GUESS=y.
The 'guess' unwinder generate awfully large and inaccurate stacktraces,
thus stackdepot can't deduplicate stacktraces because they all look like
unique. Eventually stackdepot reaches its capacity limit:

  WARNING: CPU: 0 PID: 545 at lib/stackdepot.c:119 depot_save_stack+0x28e/0x550
  Call Trace:
   ? kasan_kmalloc+0x144/0x160
   ? depot_save_stack+0x1f5/0x550
   ? do_raw_spin_unlock+0xda/0xf0
   ? preempt_count_sub+0x13/0xc0

  <...90 lines...>

   ? do_raw_spin_unlock+0xda/0xf0

Add a STACKDEPOT=n dependency to UNWINDER_GUESS to avoid the problem.

Reported-by: kernel test robot <xiaolong.ye@intel.com>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20171130123554.4330-1-aryabinin@virtuozzo.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-11 19:07:07 +01:00
Changbin Du
f79ce87fa4 x86/build: Don't verify mtools configuration file for isoimage
If mtools.conf is not generated before, 'make isoimage' could complain:

  Kernel: arch/x86/boot/bzImage is ready  (#597)
    GENIMAGE arch/x86/boot/image.iso
   *** Missing file: arch/x86/boot/mtools.conf
  arch/x86/boot/Makefile:144: recipe for target 'isoimage' failed

mtools.conf is not used for isoimage generation, so do not check it.

Signed-off-by: Changbin Du <changbin.du@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 4366d57af1 ("x86/build: Factor out fdimage/isoimage generation commands to standalone script")
Link: http://lkml.kernel.org/r/1512053480-8083-1-git-send-email-changbin.du@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-11 18:55:38 +01:00
Steve Capper
8781bcbc5e arm64: mm: Fix pte_mkclean, pte_mkdirty semantics
On systems with hardware dirty bit management, the ltp madvise09 unit
test fails due to dirty bit information being lost and pages being
incorrectly freed.

This was bisected to:
	arm64: Ignore hardware dirty bit updates in ptep_set_wrprotect()

Reverting this commit leads to a separate problem, that the unit test
retains pages that should have been dropped due to the function
madvise_free_pte_range(.) not cleaning pte's properly.

Currently pte_mkclean only clears the software dirty bit, thus the
following code sequence can appear:

	pte = pte_mkclean(pte);
	if (pte_dirty(pte))
		// this condition can return true with HW DBM!

This patch also adjusts pte_mkclean to set PTE_RDONLY thus effectively
clearing both the SW and HW dirty information.

In order for this to function on systems without HW DBM, we need to
also adjust pte_mkdirty to remove the read only bit from writable pte's
to avoid infinite fault loops.

Cc: <stable@vger.kernel.org>
Fixes: 64c26841b3 ("arm64: Ignore hardware dirty bit updates in ptep_set_wrprotect()")
Reported-by: Bhupinder Thakur <bhupinder.thakur@linaro.org>
Tested-by: Bhupinder Thakur <bhupinder.thakur@linaro.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Steve Capper <steve.capper@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-11 16:13:10 +00:00
Steve Capper
f24e5834a2 arm64: Initialise high_memory global variable earlier
The high_memory global variable is used by
cma_declare_contiguous(.) before it is defined.

We don't notice this as we compute __pa(high_memory - 1), and it looks
like we're processing a VA from the direct linear map.

This problem becomes apparent when we flip the kernel virtual address
space and the linear map is moved to the bottom of the kernel VA space.

This patch moves the initialisation of high_memory before it used.

Cc: <stable@vger.kernel.org>
Fixes: f7426b983a ("mm: cma: adjust address limit to avoid hitting low/high memory boundary")
Signed-off-by: Steve Capper <steve.capper@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-11 16:13:10 +00:00
Palmer Dabbelt
27b0174525
RISC-V: Remove unused CONFIG_HVC_RISCV_SBI code
This is code that probably should never have made it into the kernel in
the first place: it depends on a driver that hadn't been reviewed yet.
During the HVC_SBI_RISCV review process a better way of doing this was
suggested, but that means this code is defunct.  It's compile-time
disabled in 4.15 because the driver isn't in, so I think it's safe to
just remove this for now.

CC: Greg KH <gregkh@linuxfoundation.org>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2017-12-11 07:51:09 -08:00
Palmer Dabbelt
3cfa500808
RISC-V: Resurrect smp_mb__after_spinlock()
I removed this last week because of an incorrect comment:
smp_mb__after_spinlock() is actually still used, and is necessary on
RISC-V.  It's been resurrected, with a comment that describes what it
actually does this time.  Thanks to Andrea for finding the bug!

Fixes: 3343eb6806 ("RISC-V: Remove smb_mb__{before,after}_spinlock()")
CC: Andrea Parri <parri.andrea@gmail.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2017-12-11 07:51:07 -08:00
Dan Carpenter
86ad5c97ce
RISC-V: Logical vs Bitwise typo
In the current code, there is a ! logical NOT where a bitwise ~ NOT was
intended.  It means that we never return -EINVAL.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2017-12-11 07:51:06 -08:00
Karol Herbst
6d60ce384d x86/mm/kmmio: Fix mmiotrace for page unaligned addresses
If something calls ioremap() with an address not aligned to PAGE_SIZE, the
returned address might be not aligned as well. This led to a probe
registered on exactly the returned address, but the entire page was armed
for mmiotracing.

On calling iounmap() the address passed to unregister_kmmio_probe() was
PAGE_SIZE aligned by the caller leading to a complete freeze of the
machine.

We should always page align addresses while (un)registerung mappings,
because the mmiotracer works on top of pages, not mappings. We still keep
track of the probes based on their real addresses and lengths though,
because the mmiotrace still needs to know what are mapped memory regions.

Also move the call to mmiotrace_iounmap() prior page aligning the address,
so that all probes are unregistered properly, otherwise the kernel ends up
failing memory allocations randomly after disabling the mmiotracer.

Tested-by: Lyude <lyude@redhat.com>
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Acked-by: Pekka Paalanen <ppaalanen@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: nouveau@lists.freedesktop.org
Link: http://lkml.kernel.org/r/20171127075139.4928-1-kherbst@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-12-11 15:35:18 +01:00
Linus Torvalds
9c02e0601b ARM: SoC fixes for 4.15-rc
ARM SoC fixes for this merge window:
 
  - A revert of all SCPI changes from the 4.15 merge window. They had
    regressions on the Amlogic platforms, and the submaintainer isn't
    around to fix these bugs due to vacation, etc. So we agreed to revert
    and revisit in next release cycle.
 
  - A series fixing a number of bugs for ARM CCN interconnect, around
    module unload, smp_processor_id() in preemptable context, and fixing
    some memory allocation failure checks.
 
  - A handful of devicetree fixes for different platforms, fixing
    warnings and errors that were previously ignored by the compiler.
 
  - The usual set of mostly minor fixes for different platforms.
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Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:

 - A revert of all SCPI changes from the 4.15 merge window. They had
   regressions on the Amlogic platforms, and the submaintainer isn't
   around to fix these bugs due to vacation, etc. So we agreed to revert
   and revisit in next release cycle.

 - A series fixing a number of bugs for ARM CCN interconnect, around
   module unload, smp_processor_id() in preemptable context, and fixing
   some memory allocation failure checks.

 - A handful of devicetree fixes for different platforms, fixing
   warnings and errors that were previously ignored by the compiler.

 - The usual set of mostly minor fixes for different platforms.

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (42 commits)
  ARM64: dts: meson-gx: fix UART pclk clock name
  ARM: omap2: hide omap3_save_secure_ram on non-OMAP3 builds
  arm: dts: nspire: Add missing #phy-cells to usb-nop-xceiv
  ARM: dts: Fix dm814x missing phy-cells property
  ARM: dts: Fix elm interrupt compiler warning
  bus: arm-ccn: fix module unloading Error: Removing state 147 which has instances left.
  bus: arm-cci: Fix use of smp_processor_id() in preemptible context
  bus: arm-ccn: Fix use of smp_processor_id() in preemptible context
  bus: arm-ccn: Simplify code
  bus: arm-ccn: Check memory allocation failure
  bus: arm-ccn: constify attribute_group structures.
  firmware: arm_scpi: Revert updates made during v4.15 merge window
  arm: dts: marvell: Add missing #phy-cells to usb-nop-xceiv
  arm64: dts: sort vendor subdirectories in Makefile alphabetically
  meson-gx-socinfo: Fix package id parsing
  ARM: meson: fix spelling mistake: "Couln't" -> "Couldn't"
  ARM: dts: meson: fix the memory region of the GPIO interrupt controller
  ARM: dts: meson: correct the sort order for the the gpio_intc node
  MAINTAINERS: exclude other Socionext SoC DT files from ARM/UNIPHIER entry
  arm64: dts: uniphier: remove unnecessary interrupt-parent
  ...
2017-12-10 08:26:59 -08:00
Linus Torvalds
c465fc11e5 KVM fixes for v4.15-rc3
ARM:
  * A number of issues in the vgic discovered using SMATCH
  * A bit one-off calculation in out stage base address mask (32-bit and
    64-bit)
  * Fixes to single-step debugging instructions that trap for other
    reasons such as MMMIO aborts
  * Printing unavailable hyp mode as error
  * Potential spinlock deadlock in the vgic
  * Avoid calling vgic vcpu free more than once
  * Broken bit calculation for big endian systems
 
 s390:
  * SPDX tags
  * Fence storage key accesses from problem state
  * Make sure that irq_state.flags is not used in the future
 
 x86:
  * Intercept port 0x80 accesses to prevent host instability (CVE)
  * Use userspace FPU context for guest FPU (mainly an optimization that
    fixes a double use of kernel FPU)
  * Do not leak one page per module load
  * Flush APIC page address cache from MMU invalidation notifiers
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM fixes from Radim Krčmář:
 "ARM:
   - A number of issues in the vgic discovered using SMATCH
   - A bit one-off calculation in out stage base address mask (32-bit
     and 64-bit)
   - Fixes to single-step debugging instructions that trap for other
     reasons such as MMMIO aborts
   - Printing unavailable hyp mode as error
   - Potential spinlock deadlock in the vgic
   - Avoid calling vgic vcpu free more than once
   - Broken bit calculation for big endian systems

 s390:
   - SPDX tags
   - Fence storage key accesses from problem state
   - Make sure that irq_state.flags is not used in the future

  x86:
   - Intercept port 0x80 accesses to prevent host instability (CVE)
   - Use userspace FPU context for guest FPU (mainly an optimization
     that fixes a double use of kernel FPU)
   - Do not leak one page per module load
   - Flush APIC page address cache from MMU invalidation notifiers"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (28 commits)
  KVM: x86: fix APIC page invalidation
  KVM: s390: Fix skey emulation permission check
  KVM: s390: mark irq_state.flags as non-usable
  KVM: s390: Remove redundant license text
  KVM: s390: add SPDX identifiers to the remaining files
  KVM: VMX: fix page leak in hardware_setup()
  KVM: VMX: remove I/O port 0x80 bypass on Intel hosts
  x86,kvm: remove KVM emulator get_fpu / put_fpu
  x86,kvm: move qemu/guest FPU switching out to vcpu_run
  KVM: arm/arm64: Fix broken GICH_ELRSR big endian conversion
  KVM: arm/arm64: kvm_arch_destroy_vm cleanups
  KVM: arm/arm64: Fix spinlock acquisition in vgic_set_owner
  kvm: arm: don't treat unavailable HYP mode as an error
  KVM: arm/arm64: Avoid attempting to load timer vgic state without a vgic
  kvm: arm64: handle single-step of hyp emulated mmio instructions
  kvm: arm64: handle single-step during SError exceptions
  kvm: arm64: handle single-step of userspace mmio instructions
  kvm: arm64: handle single-stepping trapped instructions
  KVM: arm/arm64: debug: Introduce helper for single-step
  arm: KVM: Fix VTTBR_BADDR_MASK BUG_ON off-by-one
  ...
2017-12-10 08:24:16 -08:00
Olof Johansson
ce39882eb1 Amlogic fixes for v4.15-rc
- GPIO interrupt fixes
 - socinfo fix for GX series
 - fix typo
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Merge tag 'amlogic-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-amlogic into fixes

Amlogic fixes for v4.15-rc
- GPIO interrupt fixes
- socinfo fix for GX series
- fix typo

* tag 'amlogic-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-amlogic:
  ARM64: dts: meson-gx: fix UART pclk clock name
  meson-gx-socinfo: Fix package id parsing
  ARM: meson: fix spelling mistake: "Couln't" -> "Couldn't"
  ARM: dts: meson: fix the memory region of the GPIO interrupt controller
  ARM: dts: meson: correct the sort order for the the gpio_intc node

Signed-off-by: Olof Johansson <olof@lixom.net>
2017-12-09 20:23:29 -08:00
Olof Johansson
69b8df5d6a Two fixes for dts compiler warnings
These recently started showing up with better dtc checks being
 introduced.
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Merge tag 'omap-for-v4.15/fixes-dt-warnings' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes

Two fixes for dts compiler warnings

These recently started showing up with better dtc checks being
introduced.

* tag 'omap-for-v4.15/fixes-dt-warnings' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: dts: Fix dm814x missing phy-cells property
  ARM: dts: Fix elm interrupt compiler warning

Signed-off-by: Olof Johansson <olof@lixom.net>
2017-12-09 20:22:01 -08:00
Michal Hocko
f335195adf kmemcheck: rip it out for real
Commit 4675ff05de ("kmemcheck: rip it out") has removed the code but
for some reason SPDX header stayed in place.  This looks like a rebase
mistake in the mmotm tree or the merge mistake.  Let's drop those
leftovers as well.

Signed-off-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-12-08 13:40:17 -08:00
Linus Torvalds
e9ef1fe312 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) CAN fixes from Martin Kelly (cancel URBs properly in all the CAN usb
    drivers).

 2) Revert returning -EEXIST from __dev_alloc_name() as this propagates
    to userspace and broke some apps. From Johannes Berg.

 3) Fix conn memory leaks and crashes in TIPC, from Jon Malloc and Cong
    Wang.

 4) Gianfar MAC can't do EEE so don't advertise it by default, from
    Claudiu Manoil.

 5) Relax strict netlink attribute validation, but emit a warning. From
    David Ahern.

 6) Fix regression in checksum offload of thunderx driver, from Florian
    Westphal.

 7) Fix UAPI bpf issues on s390, from Hendrik Brueckner.

 8) New card support in iwlwifi, from Ihab Zhaika.

 9) BBR congestion control bug fixes from Neal Cardwell.

10) Fix port stats in nfp driver, from Pieter Jansen van Vuuren.

11) Fix leaks in qualcomm rmnet, from Subash Abhinov Kasiviswanathan.

12) Fix DMA API handling in sh_eth driver, from Thomas Petazzoni.

13) Fix spurious netpoll warnings in bnxt_en, from Calvin Owens.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (67 commits)
  net: mvpp2: fix the RSS table entry offset
  tcp: evaluate packet losses upon RTT change
  tcp: fix off-by-one bug in RACK
  tcp: always evaluate losses in RACK upon undo
  tcp: correctly test congestion state in RACK
  bnxt_en: Fix sources of spurious netpoll warnings
  tcp_bbr: reset long-term bandwidth sampling on loss recovery undo
  tcp_bbr: reset full pipe detection on loss recovery undo
  tcp_bbr: record "full bw reached" decision in new full_bw_reached bit
  sfc: pass valid pointers from efx_enqueue_unwind
  gianfar: Disable EEE autoneg by default
  tcp: invalidate rate samples during SACK reneging
  can: peak/pcie_fd: fix potential bug in restarting tx queue
  can: usb_8dev: cancel urb on -EPIPE and -EPROTO
  can: kvaser_usb: cancel urb on -EPIPE and -EPROTO
  can: esd_usb2: cancel urb on -EPIPE and -EPROTO
  can: ems_usb: cancel urb on -EPIPE and -EPROTO
  can: mcba_usb: cancel urb on -EPROTO
  usbnet: fix alignment for frames with no ethernet header
  tcp: use current time in tcp_rcv_space_adjust()
  ...
2017-12-08 13:32:44 -08:00
Linus Torvalds
d90696ed61 powerpc fixes for 4.15 #4
One notable fix for kexec on Power9, where we were not clearing MMU PID properly
 which sometimes leads to hangs. Finally debugged to a root cause by Nick.
 
 A revert of a patch which tried to rework our panic handling to get more output
 on the console, but inadvertently broke reporting the panic to the hypervisor,
 which apparently people care about.
 
 Then a fix for an oops in the PMU code, and finally some s/%p/%px/ in xmon.
 
 Thanks to:
   David Gibson, Nicholas Piggin, Ravi Bangoria.
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Merge tag 'powerpc-4.15-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:

 "One notable fix for kexec on Power9, where we were not clearing MMU
  PID properly which sometimes leads to hangs. Finally debugged to a
  root cause by Nick.

  A revert of a patch which tried to rework our panic handling to get
  more output on the console, but inadvertently broke reporting the
  panic to the hypervisor, which apparently people care about.

  Then a fix for an oops in the PMU code, and finally some s/%p/%px/ in
  xmon.

  Thanks to: David Gibson, Nicholas Piggin, Ravi Bangoria"

* tag 'powerpc-4.15-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/xmon: Don't print hashed pointers in xmon
  powerpc/64s: Initialize ISAv3 MMU registers before setting partition table
  Revert "powerpc: Do not call ppc_md.panic in fadump panic notifier"
  powerpc/perf: Fix oops when grouping different pmu events
2017-12-08 12:52:09 -08:00
Neil Armstrong
39005e562a ARM64: dts: meson-gx: fix UART pclk clock name
The clock-names for pclk was wrongly set to "core", but the bindings
specifies "pclk".
This was not cathed until the legacy non-documented bindings were removed.

Reported-by: Andreas Färber <afaerber@suse.de>
Fixes: f72d6f6037 ("ARM64: dts: meson-gx: use stable UART bindings with correct gate clock")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
2017-12-08 10:39:11 -08:00
Linus Torvalds
c6b3e9693f Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Martin Schwidefsky:

 - three more patches in regard to the SPDX license tags. The missing
   tags for the files in arch/s390/kvm will be merged via the KVM tree.
   With that all s390 related files should have their SPDX tags.

 - a patch to get rid of 'struct timespec' in the DASD driver.

 - bug fixes

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: fix compat system call table
  s390/mm: fix off-by-one bug in 5-level page table handling
  s390: Remove redudant license text
  s390: add a few more SPDX identifiers
  s390/dasd: prevent prefix I/O error
  s390: always save and restore all registers on context switch
  s390/dasd: remove 'struct timespec' usage
  s390/qdio: restrict target-full handling to IQDIO
  s390/qdio: consider ERROR buffers for inbound-full condition
  s390/virtio: add BSD license to virtio-ccw
2017-12-08 10:10:17 -08:00
Linus Torvalds
6e7e7f4ddc arm64 fixes:
- Fix SW PAN pgd shadowing for kernel threads, EFI and exiting user tasks
 
 - Fix FP register leak when a task_struct is re-allocated
 
 - Fix potential use-after-free in FP state tracking used by KVM
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "Fix some more FP register fallout from the SVE patches and also some
  problems with the PGD tracking in our software PAN emulation code,
  after we received a crash report from a 3.18 kernel running a
  backport.

  Summary:

   - fix SW PAN pgd shadowing for kernel threads, EFI and exiting user
     tasks

   - fix FP register leak when a task_struct is re-allocated

   - fix potential use-after-free in FP state tracking used by KVM"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64/sve: Avoid dereference of dead task_struct in KVM guest entry
  arm64: SW PAN: Update saved ttbr0 value on enter_lazy_tlb
  arm64: SW PAN: Point saved ttbr0 at the zero page when switching to init_mm
  arm64: fpsimd: Abstract out binding of task's fpsimd context to the cpu.
  arm64: fpsimd: Prevent registers leaking from dead tasks
2017-12-08 10:08:23 -08:00
Arnd Bergmann
863204cfda ARM: omap2: hide omap3_save_secure_ram on non-OMAP3 builds
In configurations without CONFIG_OMAP3 but with secure RAM support,
we now run into a link failure:

arch/arm/mach-omap2/omap-secure.o: In function `omap3_save_secure_ram':
omap-secure.c:(.text+0x130): undefined reference to `save_secure_ram_context'

The omap3_save_secure_ram() function is only called from the OMAP34xx
power management code, so we can simply hide that function in the
appropriate #ifdef.

Fixes: d09220a887 ("ARM: OMAP2+: Fix SRAM virt to phys translation for save_secure_ram_context")
Acked-by: Tony Lindgren <tony@atomide.com>
Tested-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2017-12-07 15:52:21 +01:00
Rob Herring
c5bbf358b7 arm: dts: nspire: Add missing #phy-cells to usb-nop-xceiv
"usb-nop-xceiv" is using the phy binding, but is missing #phy-cells
property. This is probably because the binding was the precursor to the phy
binding.

Fixes the following warning in nspire dts files:

Warning (phys_property): Missing property '#phy-cells' in node ...

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2017-12-07 15:52:20 +01:00
Kirill A. Shutemov
6d7e0ba2d2 x86/boot/compressed/64: Print error if 5-level paging is not supported
If the machine does not support the paging mode for which the kernel was
compiled, the boot process cannot continue.

It's not possible to let the kernel detect the mismatch as it does not even
reach the point where cpu features can be evaluted due to a triple fault in
the KASLR setup.

Instead of instantaneous silent reboot, emit an error message which gives
the user the information why the boot fails.

Fixes: 77ef56e4f0 ("x86: Enable 5-level paging support via CONFIG_X86_5LEVEL=y")
Reported-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Borislav Petkov <bp@suse.de>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: stable@vger.kernel.org
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: linux-mm@kvack.org
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lkml.kernel.org/r/20171204124059.63515-3-kirill.shutemov@linux.intel.com
2017-12-07 10:36:26 +01:00
Kirill A. Shutemov
08529078d8 x86/boot/compressed/64: Detect and handle 5-level paging at boot-time
Prerequisite for fixing the current problem of instantaneous reboots when a
5-level paging kernel is booted on 4-level paging hardware.

At the same time this change prepares the decompression code to boot-time
switching between 4- and 5-level paging.

[ tglx: Folded the GCC < 5 fix. ]

Fixes: 77ef56e4f0 ("x86: Enable 5-level paging support via CONFIG_X86_5LEVEL=y")
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: stable@vger.kernel.org
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: linux-mm@kvack.org
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lkml.kernel.org/r/20171204124059.63515-2-kirill.shutemov@linux.intel.com
2017-12-07 10:34:39 +01:00
Prarit Bhargava
947134d9b0 x86/smpboot: Do not use smp_num_siblings in __max_logical_packages calculation
Documentation/x86/topology.txt defines smp_num_siblings as "The number of
threads in a core".  Since commit bbb65d2d36 ("x86: use cpuid vector 0xb
when available for detecting cpu topology") smp_num_siblings is the
maximum number of threads in a core.  If Simultaneous MultiThreading
(SMT) is disabled on a system, smp_num_siblings is 2 and not 1 as
expected.

Use topology_max_smt_threads(), which contains the active numer of threads,
in the __max_logical_packages calculation.

On a single socket, single core, single thread system __max_smt_threads has
not been updated when the __max_logical_packages calculation happens, so its
zero which makes the package estimate fail. Initialize it to one, which is
the minimum number of threads on a core.

[ tglx: Folded the __max_smt_threads fix in ]

Fixes: b4c0a7326f ("x86/smpboot: Fix __max_logical_packages estimate")
Reported-by: Jakub Kicinski <kubakici@wp.pl>
Signed-off-by: Prarit Bhargava <prarit@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Jakub Kicinski <kubakici@wp.pl>
Cc: netdev@vger.kernel.org
Cc: "netdev@vger.kernel.org"
Cc: Clark Williams <williams@redhat.com>
Link: https://lkml.kernel.org/r/20171204164521.17870-1-prarit@redhat.com
2017-12-07 10:28:22 +01:00
Heiko Carstens
e779498df5 s390: fix compat system call table
When wiring up the socket system calls the compat entries were
incorrectly set. Not all of them point to the corresponding compat
wrapper functions, which clear the upper 33 bits of user space
pointers, like it is required.

Fixes: 977108f89c ("s390: wire up separate socketcalls system calls")
Cc: <stable@vger.kernel.org> # v4.3+
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-12-07 07:49:46 +01:00
Linus Torvalds
10f837e52b Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
Pull m68knommu fixes from Greg Ungerer:
 "There are two fixes here. One to add a missing linker section to the
  m68k architecture linker scripts, the other to fix a defconfig build
  problem"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68k/defconfig: fix stmark2 broken local compilation
  m68k: add missing SOFTIRQENTRY_TEXT linker section
2017-12-06 18:16:20 -08:00