Pull parisc fix from Helge Deller:
"Fix a kernel panic at boot time for some HP-PARISC machines"
* 'parisc-5.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Fix kernel panic in mem_init()
Including:
- Two compile test fixes for issues introduced during the
5.7-rc1 merge window.
- A fix for a reference count leak in an error path of
iommu_group_alloc().
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Merge tag 'iommu-fixes-v5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu fixes from Joerg Roedel:
- Two build fixes for issues introduced during the merge window
- A fix for a reference count leak in an error path of
iommu_group_alloc()
* tag 'iommu-fixes-v5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu: Fix reference count leak in iommu_group_alloc.
x86: Hide the archdata.iommu field behind generic IOMMU_API
ia64: Hide the archdata.iommu field behind generic IOMMU_API
The Debian kernel v5.6 triggers this kernel panic:
Kernel panic - not syncing: Bad Address (null pointer deref?)
Bad Address (null pointer deref?): Code=26 (Data memory access rights trap) at addr 0000000000000000
CPU: 0 PID: 0 Comm: swapper Not tainted 5.6.0-2-parisc64 #1 Debian 5.6.14-1
IAOQ[0]: mem_init+0xb0/0x150
IAOQ[1]: mem_init+0xb4/0x150
RP(r2): start_kernel+0x6c8/0x1190
Backtrace:
[<0000000040101ab4>] start_kernel+0x6c8/0x1190
[<0000000040108574>] start_parisc+0x158/0x1b8
on a HP-PARISC rp3440 machine with this memory layout:
Memory Ranges:
0) Start 0x0000000000000000 End 0x000000003fffffff Size 1024 MB
1) Start 0x0000004040000000 End 0x00000040ffdfffff Size 3070 MB
Fix the crash by avoiding virt_to_page() and similar functions in
mem_init() until the memory zones have been fully set up.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v5.0+
Put the rseq_syscall check point at the prologue of the syscall
will break the a0 ... a7. This will casue system call bug when
DEBUG_RSEQ is enabled.
So move it to the epilogue of syscall, but before syscall_trace.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
There is no fixup or feature in the patch, we only cleanup with:
- Remove unnecessary reg used (r11, r12), just use r9 & r10 &
syscallid regs as temp useage.
- Add _TIF_SYSCALL_WORK and _TIF_WORK_MASK to gather macros.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Current implementation could destory a4 & a5 when strace, so we need to get them
from pt_regs by SAVE_ALL.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
There is a generic, kernel wide configuration symbol for enabling the
IOMMU specific bits: CONFIG_IOMMU_API. Implementations (including
INTEL_IOMMU and AMD_IOMMU driver) select it so use it here as well.
This makes the conditional archdata.iommu field consistent with other
platforms and also fixes any compile test builds of other IOMMU drivers,
when INTEL_IOMMU or AMD_IOMMU are not selected).
For the case when INTEL_IOMMU/AMD_IOMMU and COMPILE_TEST are not
selected, this should create functionally equivalent code/choice. With
COMPILE_TEST this field could appear if other IOMMU drivers are chosen
but neither INTEL_IOMMU nor AMD_IOMMU are not.
Reported-by: kbuild test robot <lkp@intel.com>
Fixes: e93a1695d7fb ("iommu: Enable compile testing for some of drivers")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20200518120855.27822-2-krzk@kernel.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
There is a generic, kernel wide configuration symbol for enabling the
IOMMU specific bits: CONFIG_IOMMU_API. Implementations (including
INTEL_IOMMU driver) select it so use it here as well.
This makes the conditional archdata.iommu field consistent with other
platforms and also fixes any compile test builds of other IOMMU drivers,
when INTEL_IOMMU is not selected).
For the case when INTEL_IOMMU and COMPILE_TEST are not selected, this
should create functionally equivalent code/choice. With COMPILE_TEST
this field could appear if other IOMMU drivers are chosen but
INTEL_IOMMU not.
Reported-by: kbuild test robot <lkp@intel.com>
Fixes: e93a1695d7fb ("iommu: Enable compile testing for some of drivers")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200518120855.27822-1-krzk@kernel.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
- correct value of decompressor tag size in header
- fix DACR value when we have nested exceptions
- fix a missing newline on a kernel message
- fix mask for ptrace thumb breakpoint hook
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
- correct value of decompressor tag size in header
- fix DACR value when we have nested exceptions
- fix a missing newline on a kernel message
- fix mask for ptrace thumb breakpoint hook
* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: 8977/1: ptrace: Fix mask for thumb breakpoint hook
ARM: 8973/1: Add missing newline terminator to kernel message
ARM: uaccess: fix DACR mismatch with nested exceptions
ARM: uaccess: integrate uaccess_save and uaccess_restore
ARM: uaccess: consolidate uaccess asm to asm/uaccess-asm.h
ARM: 8970/1: decompressor: increase tag size
- Don't return a garbage screen info when EFI framebuffer is not available
- Make the early EFI console work proper with wider fonts instead of drawing
garbage
- Prevent a memory buffer leak in allocate_e820()
- Print the firmware error record proper so it can be decoded by users
- Fix a symbol clash in the host tool build which only happens with newer
compilers.
- Add a missing check for the event log version of TPM which caused boot
fails on several Dell systems due to an attempt to decode SHA-1 format
with the crypto agile algorithm
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Merge tag 'efi-urgent-2020-05-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fixes from Thomas Gleixner:
"A set of EFI fixes:
- Don't return a garbage screen info when EFI framebuffer is not
available
- Make the early EFI console work properly with wider fonts instead
of drawing garbage
- Prevent a memory buffer leak in allocate_e820()
- Print the firmware error record properly so it can be decoded by
users
- Fix a symbol clash in the host tool build which only happens with
newer compilers.
- Add a missing check for the event log version of TPM which caused
boot failures on several Dell systems due to an attempt to decode
SHA-1 format with the crypto agile algorithm"
* tag 'efi-urgent-2020-05-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
tpm: check event log version before reading final events
efi: Pull up arch-specific prototype efi_systab_show_arch()
x86/boot: Mark global variables as static
efi: cper: Add support for printing Firmware Error Record Reference
efi/libstub/x86: Avoid EFI map buffer alloc in allocate_e820()
efi/earlycon: Fix early printk for wider fonts
efi/libstub: Avoid returning uninitialized data from setup_graphics()
- Unbreak stack dumps for inactive tasks by interpreting the special
first frame left by __switch_to_asm() correctly. The recent change not
to skip the first frame so ORC and frame unwinder behave in the same
way caused all entries to be unreliable, i.e. prepended with '?'.
- Use cpumask_available() instead of an implicit NULL check of a
cpumask_var_t in mmio trace to prevent a Clang build warning
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Merge tag 'x86-urgent-2020-05-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"Two fixes for x86:
- Unbreak stack dumps for inactive tasks by interpreting the special
first frame left by __switch_to_asm() correctly.
The recent change not to skip the first frame so ORC and frame
unwinder behave in the same way caused all entries to be
unreliable, i.e. prepended with '?'.
- Use cpumask_available() instead of an implicit NULL check of a
cpumask_var_t in mmio trace to prevent a Clang build warning"
* tag 'x86-urgent-2020-05-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/unwind/orc: Fix unwind_get_return_address_ptr() for inactive tasks
x86/mmiotrace: Use cpumask_available() for cpumask_var_t variables
The srmmu_nocache_init() uses __nocache_fix() macro to add an offset to
page table entry to access srmmu_nocache_pool.
But since sparc32 has only three actual page table levels, pgd, p4d and
pud are essentially the same thing and pgd_offset() and p4d_offset() are
no-ops, the __nocache_fix() should be done only at PUD level.
Remove __nocache_fix() for p4d_offset() and pud_offset() and keep it
only for PUD and lower levels.
Fixes: c2bc26f7ca1f ("sparc32: use PUD rather than PGD to get PMD in srmmu_nocache_init()")
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Anatoly Pugachev <matorola@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Merge misc fixes from Andrew Morton:
"11 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
MAINTAINERS: add files related to kdump
z3fold: fix use-after-free when freeing handles
sparc32: use PUD rather than PGD to get PMD in srmmu_nocache_init()
MAINTAINERS: update email address for Naoya Horiguchi
sh: include linux/time_types.h for sockios
kasan: disable branch tracing for core runtime
selftests/vm/write_to_hugetlbfs.c: fix unused variable warning
selftests/vm/.gitignore: add mremap_dontunmap
rapidio: fix an error in get_user_pages_fast() error handling
x86: bitops: fix build regression
device-dax: don't leak kernel memory to user space after unloading kmem
- Add missing R_390_JMP_SLOT relocation type in KASLR code.
- Fix set_huge_pte_at for empty ptes issue which has been uncovered with
arch page table helper tests.
- Correct initrd location for kdump kernel.
- Fix s390_mmio_read/write with MIO in PCI code.
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Merge tag 's390-5.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Vasily Gorbik:
- Add missing R_390_JMP_SLOT relocation type in KASLR code.
- Fix set_huge_pte_at for empty ptes issue which has been uncovered
with arch page table helper tests.
- Correct initrd location for kdump kernel.
- Fix s390_mmio_read/write with MIO in PCI code.
* tag 's390-5.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/kaslr: add support for R_390_JMP_SLOT relocation type
s390/mm: fix set_huge_pte_at() for empty ptes
s390/kexec_file: fix initrd location for kdump kernel
s390/pci: Fix s390_mmio_read/write with MIO
The kbuild test robot reported the following warning:
arch/sparc/mm/srmmu.c: In function 'srmmu_nocache_init': arch/sparc/mm/srmmu.c:300:9: error: variable 'pud' set but not used [-Werror=unused-but-set-variable]
300 | pud_t *pud;
This warning is caused by misprint in the page table traversal in
srmmu_nocache_init() function which accessed a PMD entry using PGD
rather than PUD.
Since sparc32 has only 3 page table levels, the PGD and PUD are
essentially the same and usage of __nocache_fix() removed the type
checking.
Use PUD for the consistency and to silence the compiler warning.
Fixes: 7235db268a2777bc38 ("sparc32: use pgtable-nopud instead of 4level-fixup")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Anatoly Pugachev <matorola@gmail.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20200520132005.GM1059226@linux.ibm.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Using the socket ioctls on arch/sh (and only there) causes build time
problems when __kernel_old_timeval/__kernel_old_timespec are not already
visible to the compiler.
Add an explict include line for the header that defines these
structures.
Fixes: 8c709f9a0693 ("y2038: sh: remove timeval/timespec usage from headers")
Fixes: 0768e17073dc ("net: socket: implement 64-bit timestamps")
Reported-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20200519131327.1836482-1-arnd@arndb.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This is easily reproducible via CC=clang + CONFIG_STAGING=y +
CONFIG_VT6656=m.
It turns out that if your config tickles __builtin_constant_p via
differences in choices to inline or not, these statements produce
invalid assembly:
$ cat foo.c
long a(long b, long c) {
asm("orb %1, %0" : "+q"(c): "r"(b));
return c;
}
$ gcc foo.c
foo.c: Assembler messages:
foo.c:2: Error: `%rax' not allowed with `orb'
Use the `%b` "x86 Operand Modifier" to instead force register allocation
to select a lower-8-bit GPR operand.
The "q" constraint only has meaning on -m32 otherwise is treated as
"r". Not all GPRs have low-8-bit aliases for -m32.
Fixes: 1651e700664b4 ("x86: Fix bitops.h warning with a moved cast")
Reported-by: kernelci.org bot <bot@kernelci.org>
Suggested-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Suggested-by: Brian Gerst <brgerst@gmail.com>
Suggested-by: H. Peter Anvin <hpa@zytor.com>
Suggested-by: Ilie Halip <ilie.halip@gmail.com>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Tested-by: Nathan Chancellor <natechancellor@gmail.com> [build, clang-11]
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-By: Brian Gerst <brgerst@gmail.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Marco Elver <elver@google.com>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Daniel Axtens <dja@axtens.net>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20200508183230.229464-1-ndesaulniers@google.com
Link: https://github.com/ClangBuiltLinux/linux/issues/961
Link: https://lore.kernel.org/lkml/20200504193524.GA221287@google.com/
Link: https://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html#x86Operandmodifiers
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This tag contains two fixes:
* Another !MMU build fix that was a straggler from last week.
* A fix to use the "register" keyword for the GP global register variable.
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Merge tag 'riscv-for-linus-5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
"Two fixes:
- Another !MMU build fix that was a straggler from last week
- A fix to use the "register" keyword for the GP global register
variable"
* tag 'riscv-for-linus-5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
RISC-V: gp_in_global needs register keyword
riscv: Fix print_vm_layout build error if NOMMU
- fix EFI framebuffer earlycon for wide fonts
- avoid filling screen_info with garbage if the EFI framebuffer is not
available
- fix a potential host tool build error due to a symbol clash on x86
- work around a EFI firmware bug regarding the binary format of the TPM
final events table
- fix a missing memory free by reworking the E820 table sizing routine to
not do the allocation in the first place
- add CPER parsing for firmware errors
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Merge tag 'efi-fixes-for-v5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi into efi/urgent
Pull EFI fixes from Ard Biesheuvel:
"- fix EFI framebuffer earlycon for wide fonts
- avoid filling screen_info with garbage if the EFI framebuffer is not
available
- fix a potential host tool build error due to a symbol clash on x86
- work around a EFI firmware bug regarding the binary format of the TPM
final events table
- fix a missing memory free by reworking the E820 table sizing routine to
not do the allocation in the first place
- add CPER parsing for firmware errors"
Normally, show_trace_log_lvl() scans the stack, looking for text
addresses to print. In parallel, it unwinds the stack with
unwind_next_frame(). If the stack address matches the pointer returned
by unwind_get_return_address_ptr() for the current frame, the text
address is printed normally without a question mark. Otherwise it's
considered a breadcrumb (potentially from a previous call path) and it's
printed with a question mark to indicate that the address is unreliable
and typically can be ignored.
Since the following commit:
f1d9a2abff66 ("x86/unwind/orc: Don't skip the first frame for inactive tasks")
... for inactive tasks, show_trace_log_lvl() prints *only* unreliable
addresses (prepended with '?').
That happens because, for the first frame of an inactive task,
unwind_get_return_address_ptr() returns the wrong return address
pointer: one word *below* the task stack pointer. show_trace_log_lvl()
starts scanning at the stack pointer itself, so it never finds the first
'reliable' address, causing only guesses to being printed.
The first frame of an inactive task isn't a normal stack frame. It's
actually just an instance of 'struct inactive_task_frame' which is left
behind by __switch_to_asm(). Now that this inactive frame is actually
exposed to callers, fix unwind_get_return_address_ptr() to interpret it
properly.
Fixes: f1d9a2abff66 ("x86/unwind/orc: Don't skip the first frame for inactive tasks")
Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200522135435.vbxs7umku5pyrdbk@treble
- Annotate variable assignment in get_user() with the type to avoid
sparse warnings.
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- Bring the PTRACE_SYSEMU semantics in line with the man page.
- Annotate variable assignment in get_user() with the type to avoid
sparse warnings.
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Add get_user() type annotation on the !access_ok() path
arm64: Fix PTRACE_SYSEMU semantics
Sparse reports "Using plain integer as NULL pointer" when the arm64
__get_user_error() assigns 0 to a pointer type. Use proper type
annotation.
Signed-of-by: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: kbuild test robot <lkp@intel.com>
Link: http://lkml.kernel.org/r/20200522142321.GP23230@ZenIV.linux.org.uk
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
A revert of a recent change to the PTE bits for 32-bit BookS, which broke swap.
And a "fix" to disable STRICT_KERNEL_RWX for 64-bit in Kconfig, as it's causing
crashes for some people.
Thanks to:
Christophe Leroy, Rui Salvaterra.
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Merge tag 'powerpc-5.7-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- a revert of a recent change to the PTE bits for 32-bit BookS, which
broke swap.
- a "fix" to disable STRICT_KERNEL_RWX for 64-bit in Kconfig, as it's
causing crashes for some people.
Thanks to Christophe Leroy and Rui Salvaterra.
* tag 'powerpc-5.7-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/64s: Disable STRICT_KERNEL_RWX
Revert "powerpc/32s: reorder Linux PTE bits to better match Hash PTE bits."
The Intel kernel build robot recently pointed out that I missed the
register keyword on this one when I refactored the code to remove local
register variables (which aren't supported by LLVM). GCC's manual
indicates that global register variables must have the register keyword,
As far as I can tell lacking the register keyword causes GCC to ignore
the __asm__ and treat this as a regular variable, but I'm not sure how
that didn't show up as some sort of failure.
Fixes: 52e7c52d2ded ("RISC-V: Stop relying on GCC's register allocator's hueristics")
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Several strange crashes have been eventually traced back to
STRICT_KERNEL_RWX and its interaction with code patching.
Various paths in our ftrace, kprobes and other patching code need to
be hardened against patching failures, otherwise we can end up running
with partially/incorrectly patched ftrace paths, kprobes or jump
labels, which can then cause strange crashes.
Although fixes for those are in development, they're not -rc material.
There also seem to be problems with the underlying strict RWX logic,
which needs further debugging.
So for now disable STRICT_KERNEL_RWX on 64-bit to prevent people from
enabling the option and tripping over the bugs.
Fixes: 1e0fc9d1eb2b ("powerpc/Kconfig: Enable STRICT_KERNEL_RWX for some configs")
Cc: stable@vger.kernel.org # v4.13+
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200520133605.972649-1-mpe@ellerman.id.au
arch/riscv/mm/init.c: In function ‘print_vm_layout’:
arch/riscv/mm/init.c:68:37: error: ‘FIXADDR_START’ undeclared (first use in this function);
arch/riscv/mm/init.c:69:20: error: ‘FIXADDR_TOP’ undeclared
arch/riscv/mm/init.c:70:37: error: ‘PCI_IO_START’ undeclared
arch/riscv/mm/init.c:71:20: error: ‘PCI_IO_END’ undeclared
arch/riscv/mm/init.c:72:38: error: ‘VMEMMAP_START’ undeclared
arch/riscv/mm/init.c:73:20: error: ‘VMEMMAP_END’ undeclared (first use in this function);
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
- Two missing includes which cause build issues on recent systems
- Correctly set TRANS_GRE_LEN in our vector network driver
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Merge tag 'for-linus-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml
Pull UML fixes from Richard Weinberger:
- Two missing includes which caused build issues on recent systems
- Correctly set TRANS_GRE_LEN in our vector network driver
* tag 'for-linus-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
um: Fix typo in vector driver transport option definition
um: syscall.c: include <asm/unistd.h>
um: Fix xor.h include
This reverts commit 697ece78f8f749aeea40f2711389901f0974017a.
The implementation of SWAP on powerpc requires page protection
bits to not be one of the least significant PTE bits.
Until the SWAP implementation is changed and this requirement voids,
we have to keep at least _PAGE_RW outside of the 3 last bits.
For now, revert to previous PTE bits order. A further rework
may come later.
Fixes: 697ece78f8f7 ("powerpc/32s: reorder Linux PTE bits to better match Hash PTE bits.")
Reported-by: Rui Salvaterra <rsalvaterra@gmail.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/b34706f8de87f84d135abb5f3ede6b6f16fb1f41.1589969799.git.christophe.leroy@csgroup.eu
Quoth the man page:
```
If the tracee was restarted by PTRACE_SYSCALL or PTRACE_SYSEMU, the
tracee enters syscall-enter-stop just prior to entering any system
call (which will not be executed if the restart was using
PTRACE_SYSEMU, regardless of any change made to registers at this
point or how the tracee is restarted after this stop).
```
The parenthetical comment is currently true on x86 and powerpc,
but not currently true on arm64. arm64 re-checks the _TIF_SYSCALL_EMU
flag after the syscall entry ptrace stop. However, at this point,
it reflects which method was used to re-start the syscall
at the entry stop, rather than the method that was used to reach it.
Fix that by recording the original flag before performing the ptrace
stop, bringing the behavior in line with documentation and x86/powerpc.
Fixes: f086f67485c5 ("arm64: ptrace: add support for syscall emulation")
Cc: <stable@vger.kernel.org> # 5.3.x-
Signed-off-by: Keno Fischer <keno@juliacomputing.com>
Acked-by: Will Deacon <will@kernel.org>
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: Bin Lu <Bin.Lu@arm.com>
[catalin.marinas@arm.com: moved 'flags' bit masking]
[catalin.marinas@arm.com: changed 'flags' type to unsigned long]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
With certain kernel configurations, the R_390_JMP_SLOT relocation type
might be generated, which is not expected by the KASLR relocation code,
and the kernel stops with the message "Unknown relocation type".
This was found with a zfcpdump kernel config, where CONFIG_MODULES=n
and CONFIG_VFIO=n. In that case, symbol_get() is used on undefined
__weak symbols in virt/kvm/vfio.c, which results in the generation
of R_390_JMP_SLOT relocation types.
Fix this by handling R_390_JMP_SLOT similar to R_390_GLOB_DAT.
Fixes: 805bc0bc238f ("s390/kernel: build a relocatable kernel")
Cc: <stable@vger.kernel.org> # v5.2+
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
On s390, the layout of normal and large ptes (i.e. pmds/puds) differs.
Therefore, set_huge_pte_at() does a conversion from a normal pte to
the corresponding large pmd/pud. So, when converting an empty pte, this
should result in an empty pmd/pud, which would return true for
pmd/pud_none().
However, after conversion we also mark the pmd/pud as large, and
therefore present. For empty ptes, this will result in an empty pmd/pud
that is also marked as large, and pmd/pud_none() would not return true.
There is currently no issue with this behaviour, as set_huge_pte_at()
does not seem to be called for empty ptes. It would be valid though, so
let's fix this by not marking empty ptes as large in set_huge_pte_at().
This was found by testing a patch from from Anshuman Khandual, which is
currently discussed on LKML ("mm/debug: Add more arch page table helper
tests").
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
- Recent DSP code regressing ARC700 platforms
- Thinkos in ICCM/DCCM size checks
- USB regression
- other small fixes here and there
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Merge tag 'arc-5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Pull ARC fixes from Vineet Gupta:
- fix recent DSP code regression on ARC700 platforms
- fix thinkos in ICCM/DCCM size checks
- USB regression fix
- other small fixes here and there
* tag 'arc-5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
ARC: show_regs: avoid extra line of output
ARC: guard dsp early init against non ARCv2
ARC: [plat-eznps]: Restrict to CONFIG_ISA_ARCOMPACT
ARC: entry: comment
arc: remove #ifndef CONFIG_AS_CFI_SIGNAL_FRAME
arc: ptrace: hard-code "arc" instead of UTS_MACHINE
ARC: [plat-hsdk]: fix USB regression
ARC: Fix ICCM & DCCM runtime size checks
When building with Clang + -Wtautological-compare and
CONFIG_CPUMASK_OFFSTACK unset:
arch/x86/mm/mmio-mod.c:375:6: warning: comparison of array 'downed_cpus'
equal to a null pointer is always false [-Wtautological-pointer-compare]
if (downed_cpus == NULL &&
^~~~~~~~~~~ ~~~~
arch/x86/mm/mmio-mod.c:405:6: warning: comparison of array 'downed_cpus'
equal to a null pointer is always false [-Wtautological-pointer-compare]
if (downed_cpus == NULL || cpumask_weight(downed_cpus) == 0)
^~~~~~~~~~~ ~~~~
2 warnings generated.
Commit
f7e30f01a9e2 ("cpumask: Add helper cpumask_available()")
added cpumask_available() to fix warnings of this nature. Use that here
so that clang does not warn regardless of CONFIG_CPUMASK_OFFSTACK's
value.
Reported-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: https://github.com/ClangBuiltLinux/linux/issues/982
Link: https://lkml.kernel.org/r/20200408205323.44490-1-natechancellor@gmail.com
call_undef_hook() in traps.c applies the same instr_mask for both 16-bit
and 32-bit thumb instructions. If instr_mask then is only 16 bits wide
(0xffff as opposed to 0xffffffff), the first half-word of 32-bit thumb
instructions will be masked out. This makes the function match 32-bit
thumb instructions where the second half-word is equal to instr_val,
regardless of the first half-word.
The result in this case is that all undefined 32-bit thumb instructions
with the second half-word equal to 0xde01 (udf #1) work as breakpoints
and will raise a SIGTRAP instead of a SIGILL, instead of just the one
intended 16-bit instruction. An example of such an instruction is
0xeaa0de01, which is unallocated according to Arm ARM and should raise a
SIGILL, but instead raises a SIGTRAP.
This patch fixes the issue by setting all the bits in instr_mask, which
will still match the intended 16-bit thumb instruction (where the
upper half is always 0), but not any 32-bit thumb instructions.
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Fredrik Strupe <fredrik@strupe.net>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
tells the unwinding code whether a stack trace can be trusted or not is
always set correctly. This was messed up by a couple of changes in the
recent past.
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Merge tag 'objtool-urgent-2020-05-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 stack unwinding fix from Thomas Gleixner:
"A single bugfix for the ORC unwinder to ensure that the error flag
which tells the unwinding code whether a stack trace can be trusted or
not is always set correctly.
This was messed up by a couple of changes in the recent past"
* tag 'objtool-urgent-2020-05-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/unwind/orc: Fix error handling in __unwind_start()
stack protector enabled.
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Merge tag 'x86_urgent_for_v5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fix from Borislav Petkov:
"A single fix for early boot crashes of kernels built with gcc10 and
stack protector enabled"
* tag 'x86_urgent_for_v5.7-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: Fix early boot crash on gcc-10, third try
bugs, mostly for AMD processors. And a few other x86 fixes.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"A new testcase for guest debugging (gdbstub) that exposed a bunch of
bugs, mostly for AMD processors. And a few other x86 fixes"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: x86: Fix off-by-one error in kvm_vcpu_ioctl_x86_setup_mce
KVM: x86: Fix pkru save/restore when guest CR4.PKE=0, move it to x86.c
KVM: SVM: Disable AVIC before setting V_IRQ
KVM: Introduce kvm_make_all_cpus_request_except()
KVM: VMX: pass correct DR6 for GD userspace exit
KVM: x86, SVM: isolate vcpu->arch.dr6 from vmcb->save.dr6
KVM: SVM: keep DR6 synchronized with vcpu->arch.dr6
KVM: nSVM: trap #DB and #BP to userspace if guest debugging is on
KVM: selftests: Add KVM_SET_GUEST_DEBUG test
KVM: X86: Fix single-step with KVM_SET_GUEST_DEBUG
KVM: X86: Set RTM for DB_VECTOR too for KVM_EXIT_DEBUG
KVM: x86: fix DR6 delivery for various cases of #DB injection
KVM: X86: Declare KVM_CAP_SET_GUEST_DEBUG properly
A fix for unrecoverable SLB faults in the interrupt exit path, introduced by the
recent rewrite of interrupt exit in C.
Four fixes for our KUAP (Kernel Userspace Access Prevention) support on 64-bit.
These are all fairly minor with the exception of the change to evaluate the
get/put_user() arguments before we enable user access, which reduces the amount
of code we run with user access enabled.
A fix for our secure boot IMA rules, if enforcement of module signatures is
enabled at runtime rather than build time.
A fix to our 32-bit VDSO clock_getres() which wasn't falling back to the syscall
for unknown clocks.
A build fix for CONFIG_PPC_KUAP_DEBUG on 32-bit BookS, and another for 40x.
Thanks to:
Christophe Leroy, Hugh Dickins, Nicholas Piggin, Aurelien Jarno, Mimi Zohar,
Nayna Jain.
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Merge tag 'powerpc-5.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- A fix for unrecoverable SLB faults in the interrupt exit path,
introduced by the recent rewrite of interrupt exit in C.
- Four fixes for our KUAP (Kernel Userspace Access Prevention) support
on 64-bit. These are all fairly minor with the exception of the
change to evaluate the get/put_user() arguments before we enable user
access, which reduces the amount of code we run with user access
enabled.
- A fix for our secure boot IMA rules, if enforcement of module
signatures is enabled at runtime rather than build time.
- A fix to our 32-bit VDSO clock_getres() which wasn't falling back to
the syscall for unknown clocks.
- A build fix for CONFIG_PPC_KUAP_DEBUG on 32-bit BookS, and another
for 40x.
Thanks to: Christophe Leroy, Hugh Dickins, Nicholas Piggin, Aurelien
Jarno, Mimi Zohar, Nayna Jain.
* tag 'powerpc-5.7-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/40x: Make more space for system call exception
powerpc/vdso32: Fallback on getres syscall when clock is unknown
powerpc/32s: Fix build failure with CONFIG_PPC_KUAP_DEBUG
powerpc/ima: Fix secure boot rules in ima arch policy
powerpc/64s/kuap: Restore AMR in fast_interrupt_return
powerpc/64s/kuap: Restore AMR in system reset exception
powerpc/64/kuap: Move kuap checks out of MSR[RI]=0 regions of exit code
powerpc/64s: Fix unrecoverable SLB crashes due to preemption check
powerpc/uaccess: Evaluate macro arguments once, before user access is allowed
This round of fixes is almost exclusively device tree changes,
with trivial defconfig fixes and one compiler warning fix
added in.
A number of patches are to fix dtc warnings, in particular on
Amlogic, i.MX and Rockchips.
Other notable changes include:
Renesas:
- Fix a wrong clock configuration on R-Mobile A1,
- Fix IOMMU support on R-Car V3H
Allwinner
- Multiple audio fixes
Qualcomm
- Use a safe CPU voltage on MSM8996
- Fixes to match a late audio driver change
Rockchip:
- Some fixes for the newly added Pinebook Pro
NXP i.MX:
- Fix I2C1 pinctrl configuration for i.MX27 phytec-phycard board.
- Fix imx6dl-yapp4-ursa board Ethernet connection.
OMAP:
- A regression fix for non-existing can device on am534x-idk
- Fix flakey wlan on droid4 where some devices would not connect
at all because of internal pull being used with an external pull
- Fix occasional missed wake-up events on droid4 modem uart
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'arm-soc-fixes-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC/dt fixes from Arnd Bergmann:
"This round of fixes is almost exclusively device tree changes, with
trivial defconfig fixes and one compiler warning fix added in.
A number of patches are to fix dtc warnings, in particular on Amlogic,
i.MX and Rockchips.
Other notable changes include:
Renesas:
- Fix a wrong clock configuration on R-Mobile A1
- Fix IOMMU support on R-Car V3H
Allwinner
- Multiple audio fixes
Qualcomm
- Use a safe CPU voltage on MSM8996
- Fixes to match a late audio driver change
Rockchip:
- Some fixes for the newly added Pinebook Pro
NXP i.MX:
- Fix I2C1 pinctrl configuration for i.MX27 phytec-phycard board
- Fix imx6dl-yapp4-ursa board Ethernet connection
OMAP:
- A regression fix for non-existing can device on am534x-idk
- Fix flakey wlan on droid4 where some devices would not connect at
all because of internal pull being used with an external pull
- Fix occasional missed wake-up events on droid4 modem uart"
* tag 'arm-soc-fixes-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (51 commits)
ARM: dts: iwg20d-q7-dbcm-ca: Remove unneeded properties in hdmi@39
ARM: dts: renesas: Make hdmi encoder nodes compliant with DT bindings
arm64: dts: renesas: Make hdmi encoder nodes compliant with DT bindings
arm64: defconfig: add MEDIA_PLATFORM_SUPPORT
arm64: defconfig: ARCH_R8A7795: follow changed config symbol name
arm64: defconfig: add DRM_DISPLAY_CONNECTOR
arm64: defconfig: DRM_DUMB_VGA_DAC: follow changed config symbol name
ARM: oxnas: make ox820_boot_secondary static
ARM: dts: r8a7740: Add missing extal2 to CPG node
ARM: dts: omap4-droid4: Fix occasional lost wakeirq for uart1
ARM: dts: omap4-droid4: Fix flakey wlan by disabling internal pull for gpio
arm64: dts: allwinner: a64: Remove unused SPDIF sound card
arm64: dts: allwinner: a64: pinetab: Fix cpvdd supply name
arm64: dts: meson-g12: remove spurious blank line
arm64: dts: meson-g12b-khadas-vim3: add missing frddr_a status property
arm64: dts: meson-g12-common: fix dwc2 clock names
arm64: dts: meson-g12b-ugoos-am6: fix usb vbus-supply
arm64: dts: freescale: imx8mp: update input_val for AUDIOMIX_BIT_STREAM
ARM: dts: r7s9210: Remove bogus clock-names from OSTM nodes
ARM: dts: rockchip: fix pinctrl sub nodename for spi in rk322x.dtsi
...
- Fix a wrong clock configuration on R-Mobile A1,
- Minor fixes that are fast-tracked to avoid introducing regressions
during conversion of DT bindings to json-schema.
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Merge tag 'renesas-fixes-for-v5.7-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel into arm/fixes
Renesas fixes for v5.7 (take two)
- Fix a wrong clock configuration on R-Mobile A1,
- Minor fixes that are fast-tracked to avoid introducing regressions
during conversion of DT bindings to json-schema.
* tag 'renesas-fixes-for-v5.7-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-devel:
ARM: dts: iwg20d-q7-dbcm-ca: Remove unneeded properties in hdmi@39
ARM: dts: renesas: Make hdmi encoder nodes compliant with DT bindings
arm64: dts: renesas: Make hdmi encoder nodes compliant with DT bindings
ARM: dts: r8a7740: Add missing extal2 to CPG node
Link: https://lore.kernel.org/r/20200515125043.22811-1-geert+renesas@glider.be
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
the A64, and one to fix the audio codec regulator on the pinetab.
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Merge tag 'sunxi-fixes-for-5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux into arm/fixes
Two fixes for the Allwinner SoCs, one to remove some inexistant sound card on
the A64, and one to fix the audio codec regulator on the pinetab.
* tag 'sunxi-fixes-for-5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux:
arm64: dts: allwinner: a64: Remove unused SPDIF sound card
arm64: dts: allwinner: a64: pinetab: Fix cpvdd supply name
Link: https://lore.kernel.org/r/f7a98a47-316d-4b1a-b5a5-0e1e330d5f52.lettre@localhost
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Pull networking fixes from David Miller:
1) Fix sk_psock reference count leak on receive, from Xiyu Yang.
2) CONFIG_HNS should be invisible, from Geert Uytterhoeven.
3) Don't allow locking route MTUs in ipv6, RFCs actually forbid this,
from Maciej Żenczykowski.
4) ipv4 route redirect backoff wasn't actually enforced, from Paolo
Abeni.
5) Fix netprio cgroup v2 leak, from Zefan Li.
6) Fix infinite loop on rmmod in conntrack, from Florian Westphal.
7) Fix tcp SO_RCVLOWAT hangs, from Eric Dumazet.
8) Various bpf probe handling fixes, from Daniel Borkmann.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (68 commits)
selftests: mptcp: pm: rm the right tmp file
dpaa2-eth: properly handle buffer size restrictions
bpf: Restrict bpf_trace_printk()'s %s usage and add %pks, %pus specifier
bpf: Add bpf_probe_read_{user, kernel}_str() to do_refine_retval_range
bpf: Restrict bpf_probe_read{, str}() only to archs where they work
MAINTAINERS: Mark networking drivers as Maintained.
ipmr: Add lockdep expression to ipmr_for_each_table macro
ipmr: Fix RCU list debugging warning
drivers: net: hamradio: Fix suspicious RCU usage warning in bpqether.c
net: phy: broadcom: fix BCM54XX_SHD_SCR3_TRDDAPD value for BCM54810
tcp: fix error recovery in tcp_zerocopy_receive()
MAINTAINERS: Add Jakub to networking drivers.
MAINTAINERS: another add of Karsten Graul for S390 networking
drivers: ipa: fix typos for ipa_smp2p structure doc
pppoe: only process PADT targeted at local interfaces
selftests/bpf: Enforce returning 0 for fentry/fexit programs
bpf: Enforce returning 0 for fentry/fexit progs
net: stmmac: fix num_por initialization
security: Fix the default value of secid_to_secctx hook
libbpf: Fix register naming in PT_REGS s390 macros
...
This consists of a handful of build fixes, all found by Huawei's autobuilder.
None of these patches should have any functional impact on kernels that build,
and they're mostly related to various features intermingling with !MMU. While
some of these might be better hoisted to generic code, it seems better to have
the simple fixes in the meanwhile.
As far as I know these are the only outstanding patches for 5.7.
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Merge tag 'riscv-for-linus-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
"A handful of build fixes, all found by Huawei's autobuilder.
None of these patches should have any functional impact on kernels
that build, and they're mostly related to various features
intermingling with !MMU.
While some of these might be better hoisted to generic code, it seems
better to have the simple fixes in the meanwhile.
As far as I know these are the only outstanding patches for 5.7"
* tag 'riscv-for-linus-5.7-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: mmiowb: Fix implicit declaration of function 'smp_processor_id'
riscv: pgtable: Fix __kernel_map_pages build error if NOMMU
riscv: Make SYS_SUPPORTS_HUGETLBFS depends on MMU
riscv: Disable ARCH_HAS_DEBUG_VIRTUAL if NOMMU
riscv: Add pgprot_writecombine/device and PAGE_SHARED defination if NOMMU
riscv: stacktrace: Fix undefined reference to `walk_stackframe'
riscv: Fix unmet direct dependencies built based on SOC_VIRT
riscv: perf: RISCV_BASE_PMU should be independent
riscv: perf_event: Make some funciton static
address rather than size.
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fix from Catalin Marinas:
"Fix flush_icache_range() second argument in machine_kexec() to be an
address rather than size"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: fix the flush_icache_range arguments in machine_kexec
Bank_num is a one-based count of banks, not a zero-based index. It
overflows the allocated space only when strictly greater than
KVM_MAX_MCE_BANKS.
Fixes: a9e38c3e01ad ("KVM: x86: Catch potential overrun in MCE setup")
Signed-off-by: Jue Wang <juew@google.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Peter Shier <pshier@google.com>
Message-Id: <20200511225616.19557-1-jmattson@google.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
