Pull m68knommu fix from Greg Ungerer:
"A single change to fix booting on ColdFire platforms that have RAM
starting at a non-0 address"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
m68k: fix early memory reservation for ColdFire MMU systems
for systems with dcache aliasing. Those systems could previously observe
stale data, causing clock_gettime() & gettimeofday() to return incorrect
values.
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Merge tag 'mips_fixes_4.19_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux
Pull MIPS fix from Paul Burton:
"A single fix for v4.19-rc3, resolving a problem with our VDSO data
page for systems with dcache aliasing. Those systems could previously
observe stale data, causing clock_gettime() & gettimeofday() to return
incorrect values"
* tag 'mips_fixes_4.19_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
MIPS: VDSO: Match data page cache colouring when D$ aliases
Here is the nds32 patch set based on 4.19-rc2.
Contained in here are the bug fixes, building error fixes and ftrace support
for nds32.
These are the LTP20170427 testing results.
Total Tests: 1902
Total Skipped Tests: 592
Total Failures: 420
Kernel Version: 4.19.0-rc2-00018-g2c9d30cc16f0-dirty
Machine Architecture: nds32
Signed-off-by: Greentime Hu <greentime@andestech.com>
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Merge tag 'nds32-for-linus-4.19-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/greentime/linux
Pull nds32 updates from Greentime Hu:
"Contained in here are the bug fixes, building error fixes and ftrace
support for nds32"
* tag 'nds32-for-linus-4.19-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/greentime/linux:
nds32: linker script: GCOV kernel may refers data in __exit
nds32: fix build error because of wrong semicolon
nds32: Fix a kernel panic issue because of wrong frame pointer access.
nds32: Only print one page of stack when die to prevent printing too much information.
nds32: Add macro definition for offset of lp register on stack
nds32: Remove the deprecated ABI implementation
nds32/stack: Get real return address by using ftrace_graph_ret_addr
nds32/ftrace: Support dynamic function graph tracer
nds32/ftrace: Support dynamic function tracer
nds32/ftrace: Add RECORD_MCOUNT support
nds32/ftrace: Support static function graph tracer
nds32/ftrace: Support static function tracer
nds32: Extract the checking and getting pointer to a macro
nds32: Clean up the coding style
nds32: Fix get_user/put_user macro expand pointer problem
nds32: Fix empty call trace
nds32: add NULL entry to the end of_device_id array
nds32: fix logic for module
This patch is used to fix nds32 allmodconfig/allyesconfig build error
because GCOV kernel embeds counters in the kernel for each line
and a part of that embed in __exit text. So we need to keep the
EXIT_TEXT and EXIT_DATA if CONFIG_GCOV_KERNEL=y.
Link: https://lkml.org/lkml/2018/9/1/125
Signed-off-by: Greentime Hu <greentime@andestech.com>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
It shall be removed in the define usage. We shall not put a semicolon there.
/kisskb/src/arch/nds32/include/asm/elf.h:126:29: error: expected '}' before ';' token
#define ELF_DATA ELFDATA2LSB;
^
/kisskb/src/fs/proc/kcore.c:318:17: note: in expansion of macro 'ELF_DATA'
[EI_DATA] = ELF_DATA,
^~~~~~~~
/kisskb/src/fs/proc/kcore.c:312:15: note: to match this '{'
.e_ident = {
^
/kisskb/src/scripts/Makefile.build:307: recipe for target 'fs/proc/kcore.o' failed
Signed-off-by: Greentime Hu <greentime@andestech.com>
It may print too much information sometimes if the stack is wrong or
too big. This patch can limit the debug information in a page of stack.
Signed-off-by: Greentime Hu <greentime@andestech.com>
Use macro to replace the magic number.
Signed-off-by: Zong Li <zong@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
We are not using NDS32 ABI 2 for now, just remove the preprocessor
directives __NDS32_ABI_2.
Signed-off-by: Zong Li <zong@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Function graph tracer has modified the return address to
'return_to_handler' on stack, and provide the 'ftrace_graph_ret_addr' to
get the real return address.
Signed-off-by: Zong Li <zong@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
This patch contains the implementation of dynamic function graph tracer.
Signed-off-by: Zong Li <zong@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
This patch contains the implementation of dynamic function tracer.
The mcount call is composed of three instructions, so there are three
nop for enough placeholder.
Signed-off-by: Zong Li <zong@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Recognize NDS32 object files in recordmcount.pl.
Signed-off-by: Zong Li <zong@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
This patch contains implementation of static function graph tracer.
Signed-off-by: Zong Li <zong@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
This patch support the static function tracer. On nds32 ABI, we need to
always push return address to stack for __builtin_return_address can
work correctly, otherwise, it will get the wrong value of $lp at leaf
function.
Signed-off-by: Zong Li <zong@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
1. Adjust indentation.
2. Unify argument name of each macro.
3. Add space after comma in parameters list.
4. Add space after 'if' keyword.
5. Replace space by tab.
6. Change asm volatile to __asm__ __volatile__
Signed-off-by: Zong Li <zong@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
The pointer argument of macro need to be taken out once first, and then
use the new pointer in the macro body.
In kernel/trace/trace.c, get_user(ch, ubuf++) causes the unexpected
increment after expand the macro.
Signed-off-by: Zong Li <zong@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
The compiler predefined macro 'NDS32_ABI_2' had been removed, it should
use the '__NDS32_ABI_2' here.
Signed-off-by: Zong Li <zong@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
Make sure of_device_id tables are NULL terminated.
Found by coccinelle spatch "misc/of_table.cocci"
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
This bug is report by Dan Carpenter. We shall use ~loc_mask instead of
!loc_mask because we need to and(&) the bits of ~loc_mask.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: c9a4a8da6baa ("nds32: Loadable modules")
Signed-off-by: Greentime Hu <greentime@andestech.com>
A few fixes for the fallout of being a little more pedantic about
dma masks.
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Merge tag 'dma-mapping-4.19-2' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping fixes from Christoph Hellwig:
"A few fixes for the fallout of being a little more pedantic about dma
masks"
* tag 'dma-mapping-4.19-2' of git://git.infradead.org/users/hch/dma-mapping:
of/platform: initialise AMBA default DMA masks
sparc: set a default 32-bit dma mask for OF devices
kernel/dma/direct: take DMA offset into account in dma_direct_supported
The bootmem to memblock conversion introduced by the commit 1008a11590b9
("m68k: switch to MEMBLOCK + NO_BOOTMEM") made reservation of kernel code
and data to start from a wrong address.
Fix it.
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Tested-by: Angelo Dureghello <angelo@sysam.it>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
First batch of fixes post-merge window:
- A handful of devicetree changes for i.MX2{3,8} to change over to new
panel bindings. The platforms were moved from legacy framebuffers
to DRM and some development board panels hadn't yet been converted.
- OMAP fixes related to ti-sysc driver conversion fallout, fixing some
register offsets, no_console_suspend fixes, etc.
- Droid4 changes to fix flaky eMMC probing and vibrator DTS mismerge.
- Fixed 0755->0644 permissions on a newly added file.
- Defconfig changes to make ARM Versatile more useful with QEMU
(helps testing).
- Enable defconfig options for new TI SoC platform that was merged this
window (AM6).
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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:
"First batch of fixes post-merge window:
- A handful of devicetree changes for i.MX2{3,8} to change over to
new panel bindings. The platforms were moved from legacy
framebuffers to DRM and some development board panels hadn't yet
been converted.
- OMAP fixes related to ti-sysc driver conversion fallout, fixing
some register offsets, no_console_suspend fixes, etc.
- Droid4 changes to fix flaky eMMC probing and vibrator DTS mismerge.
- Fixed 0755->0644 permissions on a newly added file.
- Defconfig changes to make ARM Versatile more useful with QEMU
(helps testing).
- Enable defconfig options for new TI SoC platform that was merged
this window (AM6)"
* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
arm64: defconfig: Enable TI's AM6 SoC platform
ARM: defconfig: Update the ARM Versatile defconfig
ARM: dts: omap4-droid4: Fix emmc errors seen on some devices
ARM: dts: Fix file permission for am335x-osd3358-sm-red.dts
ARM: imx_v6_v7_defconfig: Select CONFIG_DRM_PANEL_SEIKO_43WVF1G
ARM: mxs_defconfig: Select CONFIG_DRM_PANEL_SEIKO_43WVF1G
ARM: dts: imx23-evk: Convert to the new display bindings
ARM: dts: imx23-evk: Move regulators outside simple-bus
ARM: dts: imx28-evk: Convert to the new display bindings
ARM: dts: imx28-evk: Move regulators outside simple-bus
Revert "ARM: dts: imx7d: Invert legacy PCI irq mapping"
arm: dts: am4372: setup rtc as system-power-controller
ARM: dts: omap4-droid4: fix vibrations on Droid 4
bus: ti-sysc: Fix no_console_suspend handling
bus: ti-sysc: Fix module register ioremap for larger offsets
ARM: OMAP2+: Fix module address for modules using mpu_rt_idx
ARM: OMAP2+: Fix null hwmod for ti-sysc debug
Pull x86 fixes from Thomas Gleixner:
"Speculation:
- Make the microcode check more robust
- Make the L1TF memory limit depend on the internal cache physical
address space and not on the CPUID advertised physical address
space, which might be significantly smaller. This avoids disabling
L1TF on machines which utilize the full physical address space.
- Fix the GDT mapping for EFI calls on 32bit PTI
- Fix the MCE nospec implementation to prevent #GP
Fixes and robustness:
- Use the proper operand order for LSL in the VDSO
- Prevent NMI uaccess race against CR3 switching
- Add a lockdep check to verify that text_mutex is held in
text_poke() functions
- Repair the fallout of giving native_restore_fl() a prototype
- Prevent kernel memory dumps based on usermode RIP
- Wipe KASAN shadow stack before rewinding the stack to prevent false
positives
- Move the AMS GOTO enforcement to the actual build stage to allow
user API header extraction without a compiler
- Fix a section mismatch introduced by the on demand VDSO mapping
change
Miscellaneous:
- Trivial typo, GCC quirk removal and CC_SET/OUT() cleanups"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/pti: Fix section mismatch warning/error
x86/vdso: Fix lsl operand order
x86/mce: Fix set_mce_nospec() to avoid #GP fault
x86/efi: Load fixmap GDT in efi_call_phys_epilog()
x86/nmi: Fix NMI uaccess race against CR3 switching
x86: Allow generating user-space headers without a compiler
x86/dumpstack: Don't dump kernel memory based on usermode RIP
x86/asm: Use CC_SET()/CC_OUT() in __gen_sigismember()
x86/alternatives: Lockdep-enforce text_mutex in text_poke*()
x86/entry/64: Wipe KASAN stack shadow before rewind_stack_do_exit()
x86/irqflags: Mark native_restore_fl extern inline
x86/build: Remove jump label quirk for GCC older than 4.5.2
x86/Kconfig: Fix trivial typo
x86/speculation/l1tf: Increase l1tf memory limit for Nehalem+
x86/spectre: Add missing family 6 check to microcode check
Fix the section mismatch warning in arch/x86/mm/pti.c:
WARNING: vmlinux.o(.text+0x6972a): Section mismatch in reference from the function pti_clone_pgtable() to the function .init.text:pti_user_pagetable_walk_pte()
The function pti_clone_pgtable() references
the function __init pti_user_pagetable_walk_pte().
This is often because pti_clone_pgtable lacks a __init
annotation or the annotation of pti_user_pagetable_walk_pte is wrong.
FATAL: modpost: Section mismatches detected.
Fixes: 85900ea51577 ("x86/pti: Map the vsyscall page if needed")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/43a6d6a3-d69d-5eda-da09-0b1c88215a2a@infradead.org
This keeps the historic default behavior for devices without a DMA mask,
but removes the warning about a lacking DMA mask for doing DMA without
a mask.
Reported-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Guenter Roeck <linux@roeck-us.net>
These are mostly fixes related to using ti-sysc interconnect target module
driver for accessing right register offsets for sgx and cpsw and for
no_console_suspend regression.
There is also a droid4 emmc fix where emmc may not get detected for some
models, and vibrator dts mismerge fix.
And we have a file permission fix for am335x-osd3358-sm-red.dts that
just got added. And we must tag RTC as system-power-controller for
am437x for PMIC to shut down during poweroff.
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Merge tag 'omap-for-v4.19/fixes-v2-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
Fixes for omap variants against v4.19-rc1
These are mostly fixes related to using ti-sysc interconnect target module
driver for accessing right register offsets for sgx and cpsw and for
no_console_suspend regression.
There is also a droid4 emmc fix where emmc may not get detected for some
models, and vibrator dts mismerge fix.
And we have a file permission fix for am335x-osd3358-sm-red.dts that
just got added. And we must tag RTC as system-power-controller for
am437x for PMIC to shut down during poweroff.
* tag 'omap-for-v4.19/fixes-v2-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: dts: omap4-droid4: Fix emmc errors seen on some devices
ARM: dts: Fix file permission for am335x-osd3358-sm-red.dts
arm: dts: am4372: setup rtc as system-power-controller
ARM: dts: omap4-droid4: fix vibrations on Droid 4
bus: ti-sysc: Fix no_console_suspend handling
bus: ti-sysc: Fix module register ioremap for larger offsets
ARM: OMAP2+: Fix module address for modules using mpu_rt_idx
ARM: OMAP2+: Fix null hwmod for ti-sysc debug
Signed-off-by: Olof Johansson <olof@lixom.net>
In the __getcpu function, lsl is using the wrong target and destination
registers. Luckily, the compiler tends to choose %eax for both variables,
so it has been working so far.
Fixes: a582c540ac1b ("x86/vdso: Use RDPID in preference to LSL when available")
Signed-off-by: Samuel Neves <sneves@dei.uc.pt>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180901201452.27828-1-sneves@dei.uc.pt
The trick with flipping bit 63 to avoid loading the address of the 1:1
mapping of the poisoned page while the 1:1 map is updated used to work when
unmapping the page. But it falls down horribly when attempting to directly
set the page as uncacheable.
The problem is that when the cache mode is changed to uncachable, the pages
needs to be flushed from the cache first. But the decoy address is
non-canonical due to bit 63 flipped, and the CLFLUSH instruction throws a
#GP fault.
Add code to change_page_attr_set_clr() to fix the address before calling
flush.
Fixes: 284ce4011ba6 ("x86/memory_failure: Introduce {set, clear}_mce_nospec()")
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Anvin <hpa@zytor.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Link: https://lkml.kernel.org/r/20180831165506.GA9605@agluck-desk
When a system suffers from dcache aliasing a user program may observe
stale VDSO data from an aliased cache line. Notably this can break the
expectation that clock_gettime(CLOCK_MONOTONIC, ...) is, as its name
suggests, monotonic.
In order to ensure that users observe updates to the VDSO data page as
intended, align the user mappings of the VDSO data page such that their
cache colouring matches that of the virtual address range which the
kernel will use to update the data page - typically its unmapped address
within kseg0.
This ensures that we don't introduce aliasing cache lines for the VDSO
data page, and therefore that userland will observe updates without
requiring cache invalidation.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Reported-by: Hauke Mehrtens <hauke@hauke-m.de>
Reported-by: Rene Nielsen <rene.nielsen@microsemi.com>
Reported-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Fixes: ebb5e78cc634 ("MIPS: Initial implementation of a VDSO")
Patchwork: https://patchwork.linux-mips.org/patch/20344/
Tested-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Tested-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org # v4.4+
- Fix typos in SVE documentation
- Fix type-checking and implicit truncation for SMCCC calls
- Force CONFIG_HOLES_IN_ZONE=y so that SLAB doesn't fall over NOMAP regions
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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:
"A few arm64 fixes came in this week, specifically fixing some nasty
truncation of return values from firmware calls and resolving a
VM_BUG_ON due to accessing uninitialised struct pages corresponding to
NOMAP pages.
Summary:
- Fix typos in SVE documentation
- Fix type-checking and implicit truncation for SMCCC calls
- Force CONFIG_HOLES_IN_ZONE=y so that SLAB doesn't fall over NOMAP
regions"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: mm: always enable CONFIG_HOLES_IN_ZONE
arm/arm64: smccc-1.1: Handle function result as parameters
arm/arm64: smccc-1.1: Make return values unsigned long
Documentation/arm64/sve: Couple of improvements and typos
When PTI is enabled on x86-32 the kernel uses the GDT mapped in the fixmap
for the simple reason that this address is also mapped for user-space.
The efi_call_phys_prolog()/efi_call_phys_epilog() wrappers change the GDT
to call EFI runtime services and switch back to the kernel GDT when they
return. But the switch-back uses the writable GDT, not the fixmap GDT.
When that happened and and the CPU returns to user-space it switches to the
user %cr3 and tries to restore user segment registers. This fails because
the writable GDT is not mapped in the user page-table, and without a GDT
the fault handlers also can't be launched. The result is a triple fault and
reboot of the machine.
Fix that by restoring the GDT back to the fixmap GDT which is also mapped
in the user page-table.
Fixes: 7757d607c6b3 x86/pti: ('Allow CONFIG_PAGE_TABLE_ISOLATION for x86_32')
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: hpa@zytor.com
Cc: linux-efi@vger.kernel.org
Link: https://lkml.kernel.org/r/1535702738-10971-1-git-send-email-joro@8bytes.org
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Merge tag 'for-linus-4.19b-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
- minor cleanup avoiding a warning when building with new gcc
- a patch to add a new sysfs node for Xen frontend/backend drivers to
make it easier to obtain the state of a pv device
- two fixes for 32-bit pv-guests to avoid intermediate L1TF vulnerable
PTEs
* tag 'for-linus-4.19b-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
x86/xen: remove redundant variable save_pud
xen: export device state to sysfs
x86/pae: use 64 bit atomic xchg function in native_ptep_get_and_clear
x86/xen: don't write ptes directly in 32-bit PV guests
- Fix wrong date and time on PMU-based Macs.
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Merge tag 'm68k-for-v4.19-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
Pull m68k fix from Geert Uytterhoeven:
"Just a single fix for a bug introduced during the merge window: fix
wrong date and time on PMU-based Macs"
* tag 'm68k-for-v4.19-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
m68k/mac: Use correct PMU response format
A NMI can hit in the middle of context switching or in the middle of
switch_mm_irqs_off(). In either case, CR3 might not match current->mm,
which could cause copy_from_user_nmi() and friends to read the wrong
memory.
Fix it by adding a new nmi_uaccess_okay() helper and checking it in
copy_from_user_nmi() and in __copy_from_user_nmi()'s callers.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Rik van Riel <riel@surriel.com>
Cc: Nadav Amit <nadav.amit@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jann Horn <jannh@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/dd956eba16646fd0b15c3c0741269dfd84452dac.1535557289.git.luto@kernel.org
When bootstrapping an architecture, it's usual to generate the kernel's
user-space headers (make headers_install) before building a compiler. Move
the compiler check (for asm goto support) to the archprepare target so that
it is only done when building code for the target.
Fixes: e501ce957a78 ("x86: Force asm-goto")
Reported-by: Helmut Grohne <helmutg@debian.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180829194317.GA4765@decadent.org.uk
show_opcodes() is used both for dumping kernel instructions and for dumping
user instructions. If userspace causes #PF by jumping to a kernel address,
show_opcodes() can be reached with regs->ip controlled by the user,
pointing to kernel code. Make sure that userspace can't trick us into
dumping kernel memory into dmesg.
Fixes: 7cccf0725cf7 ("x86/dumpstack: Add a show_ip() function")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: security@kernel.org
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180828154901.112726-1-jannh@google.com
Commit 6d526ee26ccd ("arm64: mm: enable CONFIG_HOLES_IN_ZONE for NUMA")
only enabled HOLES_IN_ZONE for NUMA systems because the NUMA code was
choking on the missing zone for nomap pages. This problem doesn't just
apply to NUMA systems.
If the architecture doesn't set HAVE_ARCH_PFN_VALID, pfn_valid() will
return true if the pfn is part of a valid sparsemem section.
When working with multiple pages, the mm code uses pfn_valid_within()
to test each page it uses within the sparsemem section is valid. On
most systems memory comes in MAX_ORDER_NR_PAGES chunks which all
have valid/initialised struct pages. In this case pfn_valid_within()
is optimised out.
Systems where this isn't true (e.g. due to nomap) should set
HOLES_IN_ZONE and provide HAVE_ARCH_PFN_VALID so that mm tests each
page as it works with it.
Currently non-NUMA arm64 systems can't enable HOLES_IN_ZONE, leading to
a VM_BUG_ON():
| page:fffffdff802e1780 is uninitialized and poisoned
| raw: ffffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffff
| raw: ffffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffff
| page dumped because: VM_BUG_ON_PAGE(PagePoisoned(p))
| ------------[ cut here ]------------
| kernel BUG at include/linux/mm.h:978!
| Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
[...]
| CPU: 1 PID: 25236 Comm: dd Not tainted 4.18.0 #7
| Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
| pstate: 40000085 (nZcv daIf -PAN -UAO)
| pc : move_freepages_block+0x144/0x248
| lr : move_freepages_block+0x144/0x248
| sp : fffffe0071177680
[...]
| Process dd (pid: 25236, stack limit = 0x0000000094cc07fb)
| Call trace:
| move_freepages_block+0x144/0x248
| steal_suitable_fallback+0x100/0x16c
| get_page_from_freelist+0x440/0xb20
| __alloc_pages_nodemask+0xe8/0x838
| new_slab+0xd4/0x418
| ___slab_alloc.constprop.27+0x380/0x4a8
| __slab_alloc.isra.21.constprop.26+0x24/0x34
| kmem_cache_alloc+0xa8/0x180
| alloc_buffer_head+0x1c/0x90
| alloc_page_buffers+0x68/0xb0
| create_empty_buffers+0x20/0x1ec
| create_page_buffers+0xb0/0xf0
| __block_write_begin_int+0xc4/0x564
| __block_write_begin+0x10/0x18
| block_write_begin+0x48/0xd0
| blkdev_write_begin+0x28/0x30
| generic_perform_write+0x98/0x16c
| __generic_file_write_iter+0x138/0x168
| blkdev_write_iter+0x80/0xf0
| __vfs_write+0xe4/0x10c
| vfs_write+0xb4/0x168
| ksys_write+0x44/0x88
| sys_write+0xc/0x14
| el0_svc_naked+0x30/0x34
| Code: aa1303e0 90001a01 91296421 94008902 (d4210000)
| ---[ end trace 1601ba47f6e883fe ]---
Remove the NUMA dependency.
Link: https://www.spinics.net/lists/arm-kernel/msg671851.html
Cc: <stable@vger.kernel.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reported-by: Mikulas Patocka <mpatocka@redhat.com>
Reviewed-by: Pavel Tatashin <pavel.tatashin@microsoft.com>
Tested-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Now that the 68k Mac port has adopted the via-pmu driver, it must decode
the PMU response accordingly otherwise the date and time will be wrong.
Fixes: ebd722275f9cfc67 ("macintosh/via-pmu: Replace via-pmu68k driver with via-pmu driver")
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
text_poke() and text_poke_bp() must be called with text_mutex held.
Put proper lockdep anotation in place instead of just mentioning the
requirement in a comment.
Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/nycvar.YFH.7.76.1808280853520.25787@cbobk.fhfr.pm
Reset the KASAN shadow state of the task stack before rewinding RSP.
Without this, a kernel oops will leave parts of the stack poisoned, and
code running under do_exit() can trip over such poisoned regions and cause
nonsensical false-positive KASAN reports about stack-out-of-bounds bugs.
This does not wipe the exception stacks; if an oops happens on an exception
stack, it might result in random KASAN false-positives from other tasks
afterwards. This is probably relatively uninteresting, since if the kernel
oopses on an exception stack, there are most likely bigger things to worry
about. It'd be more interesting if vmapped stacks and KASAN were
compatible, since then handle_stack_overflow() would oops from exception
stack context.
Fixes: 2deb4be28077 ("x86/dumpstack: When OOPSing, rewind the stack before do_exit()")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: kasan-dev@googlegroups.com
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180828184033.93712-1-jannh@google.com
This should have been marked extern inline in order to pick up the out
of line definition in arch/x86/kernel/irqflags.S.
Fixes: 208cbb325589 ("x86/irqflags: Provide a declaration for native_save_fl")
Reported-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180827214011.55428-1-ndesaulniers@google.com
Commit cafa0010cd51 ("Raise the minimum required gcc version to 4.6")
bumped the minimum GCC version to 4.6 for all architectures.
Remove the workaround code.
It was the only user of cc-if-fullversion. Remove the macro as well.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: linux-kbuild@vger.kernel.org
Link: https://lkml.kernel.org/r/1535348714-25457-1-git-send-email-yamada.masahiro@socionext.com
This tag contains a handful of patches that filtered their way in during
the merge window but just didn't make the deadline. It includes:
* Additional documentation in the riscv,cpu-intc device tree binding
that resulted from some feedback I missed in the original patch set.
* A build fix that provides the definition of tlb_flush() before
including tlb.h, which fixes a RISC-V build regression introduced
during this merge window.
* A cosmetic cleanup to sys_riscv_flush_icache().
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Merge tag 'riscv-for-linus-4.19-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux
Pull RISC-V fixes from Palmer Dabbelt:
"RISC-V Fixes and Cleanups for 4.19-rc2
This contains a handful of patches that filtered their way in during
the merge window but just didn't make the deadline. It includes:
- Additional documentation in the riscv,cpu-intc device tree binding
that resulted from some feedback I missed in the original patch
set.
- A build fix that provides the definition of tlb_flush() before
including tlb.h, which fixes a RISC-V build regression introduced
during this merge window.
- A cosmetic cleanup to sys_riscv_flush_icache()"
* tag 'riscv-for-linus-4.19-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux:
RISC-V: Use a less ugly workaround for unused variable warnings
riscv: tlb: Provide definition of tlb_flush() before including tlb.h
dt-bindings: riscv,cpu-intc: Cleanups from a missed review
The newly added code that emits ksymtab entries as pairs of 32-bit
relative references interacts poorly with the way powerpc lays out its
address space: when a module exports a per-CPU variable, the primary
module region covering the ksymtab entry -and thus the 32-bit relative
reference- is too far away from the actual per-CPU variable's base
address (to which the per-CPU offsets are applied to obtain the
respective address of each CPU's copy), resulting in corruption when the
module loader attempts to resolve symbol references of modules that are
loaded on top and link to the exported per-CPU symbol.
So let's disable this feature on powerpc. Even though it implements
CONFIG_RELOCATABLE, it does not implement CONFIG_RANDOMIZE_BASE and so
KASLR kernels (which are the main target of the feature) do not exist on
powerpc anyway.
Reported-by: Andreas Schwab <schwab@linux-m68k.org>
Suggested-by: Nicholas Piggin <nicholas.piggin@gmail.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull crypto fixes from Herbert Xu:
- Check for the right CPU feature bit in sm4-ce on arm64.
- Fix scatterwalk WARN_ON in aes-gcm-ce on arm64.
- Fix unaligned fault in aesni on x86.
- Fix potential NULL pointer dereference on exit in chtls.
- Fix DMA mapping direction for RSA in caam.
- Fix error path return value for xts setkey in caam.
- Fix address endianness when DMA unmapping in caam.
- Fix sleep-in-atomic in vmx.
- Fix command corruption when queue is full in cavium/nitrox.
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: cavium/nitrox - fix for command corruption in queue full case with backlog submissions.
crypto: vmx - Fix sleep-in-atomic bugs
crypto: arm64/aes-gcm-ce - fix scatterwalk API violation
crypto: aesni - Use unaligned loads from gcm_context_data
crypto: chtls - fix null dereference chtls_free_uld()
crypto: arm64/sm4-ce - check for the right CPU feature bit
crypto: caam - fix DMA mapping direction for RSA forms 2 & 3
crypto: caam/qi - fix error path in xts setkey
crypto: caam/jr - fix descriptor DMA unmapping
