IF YOU WOULD LIKE TO GET AN ACCOUNT, please write an
email to Administrator. User accounts are meant only to access repo
and report issues and/or generate pull requests.
This is a purpose-specific Git hosting for
BaseALT
projects. Thank you for your understanding!
Только зарегистрированные пользователи имеют доступ к сервису!
Для получения аккаунта, обратитесь к администратору.
using the respective functionality from the RTC library
-----BEGIN PGP SIGNATURE-----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=9t5p
-----END PGP SIGNATURE-----
Merge tag 'x86_timers_for_v6.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 RTC cleanups from Borislav Petkov:
- Cleanup x86/rtc.c and delete duplicated functionality in favor of
using the respective functionality from the RTC library
* tag 'x86_timers_for_v6.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/rtc: Rename mach_set_rtc_mmss() to mach_set_cmos_time()
x86/rtc: Rewrite & simplify mach_get_cmos_time() by deleting duplicated functionality
is running as a guest on the ACRN hypervisor
-----BEGIN PGP SIGNATURE-----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=Ds89
-----END PGP SIGNATURE-----
Merge tag 'x86_platform_for_v6.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 platform update from Borislav Petkov:
"A single x86/platform improvement when the kernel is running as an
ACRN guest:
- Get TSC and CPU frequency from CPUID leaf 0x40000010 when the
kernel is running as a guest on the ACRN hypervisor"
* tag 'x86_platform_for_v6.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/acrn: Set up timekeeping
- Improve error decoding speed of the Intel drivers by avoiding the ACPI facilities
but doing decoding in the driver itself
- Other misc improvements to the Intel drivers
- The usual cleanups and fixlets all over EDAC land
-----BEGIN PGP SIGNATURE-----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=Gh9S
-----END PGP SIGNATURE-----
Merge tag 'edac_updates_for_v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras
Pull EDAC updates from Borislav Petkov:
- Add support for Skylake-S CPUs to ie31200_edac
- Improve error decoding speed of the Intel drivers by avoiding the
ACPI facilities but doing decoding in the driver itself
- Other misc improvements to the Intel drivers
- The usual cleanups and fixlets all over EDAC land
* tag 'edac_updates_for_v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
EDAC/i7300: Correct the i7300_exit() function name in comment
x86/sb_edac: Add row column translation for Broadwell
EDAC/i10nm: Print an extra register set of retry_rd_err_log
EDAC/i10nm: Retrieve and print retry_rd_err_log registers for HBM
EDAC/skx_common: Add ChipSelect ADXL component
EDAC/ppc_4xx: Reorder symbols to get rid of a few forward declarations
EDAC: Remove obsolete declarations in edac_module.h
EDAC/i10nm: Add driver decoder for Ice Lake and Tremont CPUs
EDAC/skx_common: Make output format similar
EDAC/skx_common: Use driver decoder first
EDAC/mc: Drop duplicated dimm->nr_pages debug printout
EDAC/mc: Replace spaces with tabs in memtype flags definition
EDAC/wq: Remove unneeded flush_workqueue()
EDAC/ie31200: Add Skylake-S support
Various fixes across several hardening areas:
- loadpin: Fix verity target enforcement (Matthias Kaehlcke).
- zero-call-used-regs: Add missing clobbers in paravirt (Bill Wendling).
- CFI: clean up sparc function pointer type mismatches (Bart Van Assche).
- Clang: Adjust compiler flag detection for various Clang changes (Sami
Tolvanen, Kees Cook).
- fortify: Fix warnings in arch-specific code in sh, ARM, and xen.
Improvements to existing features:
- testing: improve overflow KUnit test, introduce fortify KUnit test,
add more coverage to LKDTM tests (Bart Van Assche, Kees Cook).
- overflow: Relax overflow type checking for wider utility.
New features:
- string: Introduce strtomem() and strtomem_pad() to fill a gap in
strncpy() replacement needs.
- um: Enable FORTIFY_SOURCE support.
- fortify: Enable run-time struct member memcpy() overflow warning.
-----BEGIN PGP SIGNATURE-----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=HZ6+
-----END PGP SIGNATURE-----
Merge tag 'hardening-v6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull kernel hardening updates from Kees Cook:
"Most of the collected changes here are fixes across the tree for
various hardening features (details noted below).
The most notable new feature here is the addition of the memcpy()
overflow warning (under CONFIG_FORTIFY_SOURCE), which is the next step
on the path to killing the common class of "trivially detectable"
buffer overflow conditions (i.e. on arrays with sizes known at compile
time) that have resulted in many exploitable vulnerabilities over the
years (e.g. BleedingTooth).
This feature is expected to still have some undiscovered false
positives. It's been in -next for a full development cycle and all the
reported false positives have been fixed in their respective trees.
All the known-bad code patterns we could find with Coccinelle are also
either fixed in their respective trees or in flight.
The commit message in commit 54d9469bc515 ("fortify: Add run-time WARN
for cross-field memcpy()") for the feature has extensive details, but
I'll repeat here that this is a warning _only_, and is not intended to
actually block overflows (yet). The many patches fixing array sizes
and struct members have been landing for several years now, and we're
finally able to turn this on to find any remaining stragglers.
Summary:
Various fixes across several hardening areas:
- loadpin: Fix verity target enforcement (Matthias Kaehlcke).
- zero-call-used-regs: Add missing clobbers in paravirt (Bill
Wendling).
- CFI: clean up sparc function pointer type mismatches (Bart Van
Assche).
- Clang: Adjust compiler flag detection for various Clang changes
(Sami Tolvanen, Kees Cook).
- fortify: Fix warnings in arch-specific code in sh, ARM, and xen.
Improvements to existing features:
- testing: improve overflow KUnit test, introduce fortify KUnit test,
add more coverage to LKDTM tests (Bart Van Assche, Kees Cook).
- overflow: Relax overflow type checking for wider utility.
New features:
- string: Introduce strtomem() and strtomem_pad() to fill a gap in
strncpy() replacement needs.
- um: Enable FORTIFY_SOURCE support.
- fortify: Enable run-time struct member memcpy() overflow warning"
* tag 'hardening-v6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (27 commits)
Makefile.extrawarn: Move -Wcast-function-type-strict to W=1
hardening: Remove Clang's enable flag for -ftrivial-auto-var-init=zero
sparc: Unbreak the build
x86/paravirt: add extra clobbers with ZERO_CALL_USED_REGS enabled
x86/paravirt: clean up typos and grammaros
fortify: Convert to struct vs member helpers
fortify: Explicitly check bounds are compile-time constants
x86/entry: Work around Clang __bdos() bug
ARM: decompressor: Include .data.rel.ro.local
fortify: Adjust KUnit test for modular build
sh: machvec: Use char[] for section boundaries
kunit/memcpy: Avoid pathological compile-time string size
lib: Improve the is_signed_type() kunit test
LoadPin: Require file with verity root digests to have a header
dm: verity-loadpin: Only trust verity targets with enforcement
LoadPin: Fix Kconfig doc about format of file with verity digests
um: Enable FORTIFY_SOURCE
lkdtm: Update tests for memcpy() run-time warnings
fortify: Add run-time WARN for cross-field memcpy()
fortify: Use SIZE_MAX instead of (size_t)-1
...
This replaces the prior support for Clang's standard Control Flow
Integrity (CFI) instrumentation, which has required a lot of special
conditions (e.g. LTO) and work-arounds. The current implementation
("Kernel CFI") is specific to C, directly designed for the Linux kernel,
and takes advantage of architectural features like x86's IBT. This
series retains arm64 support and adds x86 support. Additional "generic"
architectural support is expected soon:
https://github.com/samitolvanen/llvm-project/commits/kcfi_generic
- treewide: Remove old CFI support details
- arm64: Replace Clang CFI support with Clang KCFI support
- x86: Introduce Clang KCFI support
-----BEGIN PGP SIGNATURE-----
iQJKBAABCgA0FiEEpcP2jyKd1g9yPm4TiXL039xtwCYFAmM4aAUWHGtlZXNjb29r
QGNocm9taXVtLm9yZwAKCRCJcvTf3G3AJkgWD/4mUgb7xewNIG/+fuipGd620Iao
K0T8q4BNxLNRltOxNc3Q0WMDCggX0qJGCeds7EdFQJQOGxWcbifM8MAS4idAGM0G
fc3Gxl1imC/oF6goCAbQgndA6jYFIWXGsv8LsRjAXRidWLFr3GFAqVqYJyokSySr
8zMQsEDuF4I1gQnOhEWdtPZbV3MQ4ZjfFzpv+33agbq6Gb72vKvDh3G6g2VXlxjt
1qnMtS+eEpbBU65cJkOi4MSLgymWbnIAeTMb0dbsV4kJ08YoTl8uz1B+weeH6GgT
WP73ZJ4nqh1kkkT9EqS9oKozNB9fObhvCokEuAjuQ7i1eCEZsbShvRc0iL7OKTGG
UfuTJa5qQ4h7Z0JS35FCSJETa+fcG0lTyEd133nLXLMZP9K2antf+A6O//fd0J1V
Jg4VN7DQmZ+UNGOzRkL6dTtQUy4PkxhniIloaClfSYXxhNirA+v//sHTnTK3z2Bl
6qceYqmFmns2Laual7+lvnZgt6egMBcmAL/MOdbU74+KIR9Xw76wxQjifktHX+WF
FEUQkUJDB5XcUyKlbvHoqobRMxvEZ8RIlC5DIkgFiPRE3TI0MqfzNSFnQ/6+lFNg
Y0AS9HYJmcj8sVzAJ7ji24WPFCXzsbFn6baJa9usDNbWyQZokYeiv7ZPNPHPDVrv
YEBP6aYko0lVSUS9qw==
=Li4D
-----END PGP SIGNATURE-----
Merge tag 'kcfi-v6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull kcfi updates from Kees Cook:
"This replaces the prior support for Clang's standard Control Flow
Integrity (CFI) instrumentation, which has required a lot of special
conditions (e.g. LTO) and work-arounds.
The new implementation ("Kernel CFI") is specific to C, directly
designed for the Linux kernel, and takes advantage of architectural
features like x86's IBT. This series retains arm64 support and adds
x86 support.
GCC support is expected in the future[1], and additional "generic"
architectural support is expected soon[2].
Summary:
- treewide: Remove old CFI support details
- arm64: Replace Clang CFI support with Clang KCFI support
- x86: Introduce Clang KCFI support"
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107048 [1]
Link: https://github.com/samitolvanen/llvm-project/commits/kcfi_generic [2]
* tag 'kcfi-v6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (22 commits)
x86: Add support for CONFIG_CFI_CLANG
x86/purgatory: Disable CFI
x86: Add types to indirectly called assembly functions
x86/tools/relocs: Ignore __kcfi_typeid_ relocations
kallsyms: Drop CONFIG_CFI_CLANG workarounds
objtool: Disable CFI warnings
objtool: Preserve special st_shndx indexes in elf_update_symbol
treewide: Drop __cficanonical
treewide: Drop WARN_ON_FUNCTION_MISMATCH
treewide: Drop function_nocfi
init: Drop __nocfi from __init
arm64: Drop unneeded __nocfi attributes
arm64: Add CFI error handling
arm64: Add types to indirect called assembly functions
psci: Fix the function type for psci_initcall_t
lkdtm: Emit an indirect call for CFI tests
cfi: Add type helper macros
cfi: Switch to -fsanitize=kcfi
cfi: Drop __CFI_ADDRESSABLE
cfi: Remove CONFIG_CFI_CLANG_SHADOW
...
The initial support of Rust-for-Linux comes in roughly 4 areas:
- Kernel internals (kallsyms expansion for Rust symbols, %pA format)
- Kbuild infrastructure (Rust build rules and support scripts)
- Rust crates and bindings for initial minimum viable build
- Rust kernel documentation and samples
Rust support has been in linux-next for a year and a half now, and the
short log doesn't do justice to the number of people who have contributed
both to the Linux kernel side but also to the upstream Rust side to
support the kernel's needs. Thanks to these 173 people, and many more,
who have been involved in all kinds of ways:
Miguel Ojeda, Wedson Almeida Filho, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Andreas Hindborg, Adam Bratschi-Kaye, Benno Lossin,
Maciej Falkowski, Finn Behrens, Sven Van Asbroeck, Asahi Lina, FUJITA
Tomonori, John Baublitz, Wei Liu, Geoffrey Thomas, Philip Herron,
Arthur Cohen, David Faust, Antoni Boucher, Philip Li, Yujie Liu,
Jonathan Corbet, Greg Kroah-Hartman, Paul E. McKenney, Josh Triplett,
Kent Overstreet, David Gow, Alice Ryhl, Robin Randhawa, Kees Cook,
Nick Desaulniers, Matthew Wilcox, Linus Walleij, Joe Perches, Michael
Ellerman, Petr Mladek, Masahiro Yamada, Arnaldo Carvalho de Melo,
Andrii Nakryiko, Konstantin Shelekhin, Rasmus Villemoes, Konstantin
Ryabitsev, Stephen Rothwell, Andy Shevchenko, Sergey Senozhatsky, John
Paul Adrian Glaubitz, David Laight, Nathan Chancellor, Jonathan
Cameron, Daniel Latypov, Shuah Khan, Brendan Higgins, Julia Lawall,
Laurent Pinchart, Geert Uytterhoeven, Akira Yokosawa, Pavel Machek,
David S. Miller, John Hawley, James Bottomley, Arnd Bergmann,
Christian Brauner, Dan Robertson, Nicholas Piggin, Zhouyi Zhou, Elena
Zannoni, Jose E. Marchesi, Leon Romanovsky, Will Deacon, Richard
Weinberger, Randy Dunlap, Paolo Bonzini, Roland Dreier, Mark Brown,
Sasha Levin, Ted Ts'o, Steven Rostedt, Jarkko Sakkinen, Michal
Kubecek, Marco Elver, Al Viro, Keith Busch, Johannes Berg, Jan Kara,
David Sterba, Connor Kuehl, Andy Lutomirski, Andrew Lunn, Alexandre
Belloni, Peter Zijlstra, Russell King, Eric W. Biederman, Willy
Tarreau, Christoph Hellwig, Emilio Cobos Álvarez, Christian Poveda,
Mark Rousskov, John Ericson, TennyZhuang, Xuanwo, Daniel Paoliello,
Manish Goregaokar, comex, Josh Stone, Stephan Sokolow, Philipp Krones,
Guillaume Gomez, Joshua Nelson, Mats Larsen, Marc Poulhiès, Samantha
Miller, Esteban Blanc, Martin Schmidt, Martin Rodriguez Reboredo,
Daniel Xu, Viresh Kumar, Bartosz Golaszewski, Vegard Nossum, Milan
Landaverde, Dariusz Sosnowski, Yuki Okushi, Matthew Bakhtiari, Wu
XiangCheng, Tiago Lam, Boris-Chengbiao Zhou, Sumera Priyadarsini,
Viktor Garske, Niklas Mohrin, Nándor István Krácser, Morgan Bartlett,
Miguel Cano, Léo Lanteri Thauvin, Julian Merkle, Andreas Reindl,
Jiapeng Chong, Fox Chen, Douglas Su, Antonio Terceiro, SeongJae Park,
Sergio González Collado, Ngo Iok Ui (Wu Yu Wei), Joshua Abraham,
Milan, Daniel Kolsoi, ahomescu, Manas, Luis Gerhorst, Li Hongyu,
Philipp Gesang, Russell Currey, Jalil David Salamé Messina, Jon Olson,
Raghvender, Angelos, Kaviraj Kanagaraj, Paul Römer, Sladyn Nunes,
Mauro Baladés, Hsiang-Cheng Yang, Abhik Jain, Hongyu Li, Sean Nash,
Yuheng Su, Peng Hao, Anhad Singh, Roel Kluin, Sara Saa, Geert
Stappers, Garrett LeSage, IFo Hancroft, and Linus Torvalds.
-----BEGIN PGP SIGNATURE-----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=zz09
-----END PGP SIGNATURE-----
Merge tag 'rust-v6.1-rc1' of https://github.com/Rust-for-Linux/linux
Pull Rust introductory support from Kees Cook:
"The tree has a recent base, but has fundamentally been in linux-next
for a year and a half[1]. It's been updated based on feedback from the
Kernel Maintainer's Summit, and to gain recent Reviewed-by: tags.
Miguel is the primary maintainer, with me helping where needed/wanted.
Our plan is for the tree to switch to the standard non-rebasing
practice once this initial infrastructure series lands.
The contents are the absolute minimum to get Rust code building in the
kernel, with many more interfaces[2] (and drivers - NVMe[3], 9p[4], M1
GPU[5]) on the way.
The initial support of Rust-for-Linux comes in roughly 4 areas:
- Kernel internals (kallsyms expansion for Rust symbols, %pA format)
- Kbuild infrastructure (Rust build rules and support scripts)
- Rust crates and bindings for initial minimum viable build
- Rust kernel documentation and samples
Rust support has been in linux-next for a year and a half now, and the
short log doesn't do justice to the number of people who have
contributed both to the Linux kernel side but also to the upstream
Rust side to support the kernel's needs. Thanks to these 173 people,
and many more, who have been involved in all kinds of ways:
Miguel Ojeda, Wedson Almeida Filho, Alex Gaynor, Boqun Feng, Gary Guo,
Björn Roy Baron, Andreas Hindborg, Adam Bratschi-Kaye, Benno Lossin,
Maciej Falkowski, Finn Behrens, Sven Van Asbroeck, Asahi Lina, FUJITA
Tomonori, John Baublitz, Wei Liu, Geoffrey Thomas, Philip Herron,
Arthur Cohen, David Faust, Antoni Boucher, Philip Li, Yujie Liu,
Jonathan Corbet, Greg Kroah-Hartman, Paul E. McKenney, Josh Triplett,
Kent Overstreet, David Gow, Alice Ryhl, Robin Randhawa, Kees Cook,
Nick Desaulniers, Matthew Wilcox, Linus Walleij, Joe Perches, Michael
Ellerman, Petr Mladek, Masahiro Yamada, Arnaldo Carvalho de Melo,
Andrii Nakryiko, Konstantin Shelekhin, Rasmus Villemoes, Konstantin
Ryabitsev, Stephen Rothwell, Andy Shevchenko, Sergey Senozhatsky, John
Paul Adrian Glaubitz, David Laight, Nathan Chancellor, Jonathan
Cameron, Daniel Latypov, Shuah Khan, Brendan Higgins, Julia Lawall,
Laurent Pinchart, Geert Uytterhoeven, Akira Yokosawa, Pavel Machek,
David S. Miller, John Hawley, James Bottomley, Arnd Bergmann,
Christian Brauner, Dan Robertson, Nicholas Piggin, Zhouyi Zhou, Elena
Zannoni, Jose E. Marchesi, Leon Romanovsky, Will Deacon, Richard
Weinberger, Randy Dunlap, Paolo Bonzini, Roland Dreier, Mark Brown,
Sasha Levin, Ted Ts'o, Steven Rostedt, Jarkko Sakkinen, Michal
Kubecek, Marco Elver, Al Viro, Keith Busch, Johannes Berg, Jan Kara,
David Sterba, Connor Kuehl, Andy Lutomirski, Andrew Lunn, Alexandre
Belloni, Peter Zijlstra, Russell King, Eric W. Biederman, Willy
Tarreau, Christoph Hellwig, Emilio Cobos Álvarez, Christian Poveda,
Mark Rousskov, John Ericson, TennyZhuang, Xuanwo, Daniel Paoliello,
Manish Goregaokar, comex, Josh Stone, Stephan Sokolow, Philipp Krones,
Guillaume Gomez, Joshua Nelson, Mats Larsen, Marc Poulhiès, Samantha
Miller, Esteban Blanc, Martin Schmidt, Martin Rodriguez Reboredo,
Daniel Xu, Viresh Kumar, Bartosz Golaszewski, Vegard Nossum, Milan
Landaverde, Dariusz Sosnowski, Yuki Okushi, Matthew Bakhtiari, Wu
XiangCheng, Tiago Lam, Boris-Chengbiao Zhou, Sumera Priyadarsini,
Viktor Garske, Niklas Mohrin, Nándor István Krácser, Morgan Bartlett,
Miguel Cano, Léo Lanteri Thauvin, Julian Merkle, Andreas Reindl,
Jiapeng Chong, Fox Chen, Douglas Su, Antonio Terceiro, SeongJae Park,
Sergio González Collado, Ngo Iok Ui (Wu Yu Wei), Joshua Abraham,
Milan, Daniel Kolsoi, ahomescu, Manas, Luis Gerhorst, Li Hongyu,
Philipp Gesang, Russell Currey, Jalil David Salamé Messina, Jon Olson,
Raghvender, Angelos, Kaviraj Kanagaraj, Paul Römer, Sladyn Nunes,
Mauro Baladés, Hsiang-Cheng Yang, Abhik Jain, Hongyu Li, Sean Nash,
Yuheng Su, Peng Hao, Anhad Singh, Roel Kluin, Sara Saa, Geert
Stappers, Garrett LeSage, IFo Hancroft, and Linus Torvalds"
Link: https://lwn.net/Articles/849849/ [1]
Link: https://github.com/Rust-for-Linux/linux/commits/rust [2]
Link: d88c3744d6 [3]
Link: 9367032607 [4]
Link: https://github.com/AsahiLinux/linux/commits/gpu/rust-wip [5]
* tag 'rust-v6.1-rc1' of https://github.com/Rust-for-Linux/linux: (27 commits)
MAINTAINERS: Rust
samples: add first Rust examples
x86: enable initial Rust support
docs: add Rust documentation
Kbuild: add Rust support
rust: add `.rustfmt.toml`
scripts: add `is_rust_module.sh`
scripts: add `rust_is_available.sh`
scripts: add `generate_rust_target.rs`
scripts: add `generate_rust_analyzer.py`
scripts: decode_stacktrace: demangle Rust symbols
scripts: checkpatch: enable language-independent checks for Rust
scripts: checkpatch: diagnose uses of `%pA` in the C side as errors
vsprintf: add new `%pA` format specifier
rust: export generated symbols
rust: add `kernel` crate
rust: add `bindings` crate
rust: add `macros` crate
rust: add `compiler_builtins` crate
rust: adapt `alloc` crate to the kernel
...
cause segfaults when lscpu accesses their representation in sysfs
- Fix for a race in the alternatives batch patching machinery when
kprobes are set
-----BEGIN PGP SIGNATURE-----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=MiiB
-----END PGP SIGNATURE-----
Merge tag 'x86_urgent_for_v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov:
- Add the respective UP last level cache mask accessors in order not to
cause segfaults when lscpu accesses their representation in sysfs
- Fix for a race in the alternatives batch patching machinery when
kprobes are set
* tag 'x86_urgent_for_v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cacheinfo: Add a cpu_llc_shared_mask() UP variant
x86/alternative: Fix race in try_get_desc()
* Skip tests that require EPT when it is not available
* Do not hang when a test fails with an empty stack trace
* avoid spurious failure when running access_tracking_perf_test in a KVM guest
* work around GCC's tendency to optimize loops into mem*() functions, which
breaks because the guest code in selftests cannot call into PLTs
* fix -Warray-bounds error in fix_hypercall_test
-----BEGIN PGP SIGNATURE-----
iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmM2x0MUHHBib256aW5p
QHJlZGhhdC5jb20ACgkQv/vSX3jHroMLBggAmQpzSTuUq8Vn4fbXg8NpxofzZVzo
hWagwlm29Ac7jfoSa4lOX4nbkyb5CjEL1O2qSd1/lJuZndMxQhmLe3Bnzu2Mzqp0
7WFXr0lAiOeH4hw8NE9Kx4x/vJ8nev4gsOlWNh7rr1RlP3vgHTtyYN/J7UoNnvTl
fcbD1Bi/A+2RnzMQ6cHms8lqsAfts/OZIMTCUf0TW2EhLmrN5CLwQkRNNh1Ql8gX
/ZvLs6C/FEkgok6Wfc6mMrIY+Wlu7en6/pHAjeORAoieGC2CYh0Od3ETzpe7Qx+L
L/W3BiOYlvQBqEQmgzd6bpVNDlqhn0GGczY5rkB54Es7jfxUjLU2myqw+g==
=bb0j
-----END PGP SIGNATURE-----
Merge tag 'for-linus-6.0' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"A small fix to the reported set of supported CPUID bits, and selftests
fixes:
- Skip tests that require EPT when it is not available
- Do not hang when a test fails with an empty stack trace
- avoid spurious failure when running access_tracking_perf_test in a
KVM guest
- work around GCC's tendency to optimize loops into mem*() functions,
which breaks because the guest code in selftests cannot call into
PLTs
- fix -Warray-bounds error in fix_hypercall_test"
* tag 'for-linus-6.0' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: selftests: Compare insn opcodes directly in fix_hypercall_test
KVM: selftests: Implement memcmp(), memcpy(), and memset() for guest use
KVM: x86: Hide IA32_PLATFORM_DCA_CAP[31:0] from the guest
KVM: selftests: Gracefully handle empty stack traces
KVM: selftests: replace assertion with warning in access_tracking_perf_test
KVM: selftests: Skip tests that require EPT when it is not available
The only thing reported by CPUID.9 is the value of
IA32_PLATFORM_DCA_CAP[31:0] in EAX. This MSR doesn't even exist in the
guest, since CPUID.1:ECX.DCA[bit 18] is clear in the guest.
Clear CPUID.9 in KVM_GET_SUPPORTED_CPUID.
Fixes: 24c82e576b78 ("KVM: Sanitize cpuid")
Signed-off-by: Jim Mattson <jmattson@google.com>
Message-Id: <20220922231854.249383-1-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
On a CONFIG_SMP=n kernel, the LLC shared mask is 0, which prevents
__cache_amd_cpumap_setup() from doing the L3 masks setup, and more
specifically from setting up the shared_cpu_map and shared_cpu_list
files in sysfs, leading to lscpu from util-linux getting confused and
segfaulting.
Add a cpu_llc_shared_mask() UP variant which returns a mask with a
single bit set, i.e., for CPU0.
Fixes: 2b83809a5e6d ("x86/cpu/amd: Derive L3 shared_cpu_map from cpu_llc_shared_mask")
Reported-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/1660148115-302-1-git-send-email-ssengar@linux.microsoft.com
Note that only x86_64 is covered and not all features nor mitigations
are handled, but it is enough as a starting point and showcases
the basics needed to add Rust support for a new architecture.
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Co-developed-by: Alex Gaynor <alex.gaynor@gmail.com>
Signed-off-by: Alex Gaynor <alex.gaynor@gmail.com>
Co-developed-by: Wedson Almeida Filho <wedsonaf@google.com>
Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com>
Co-developed-by: David Gow <davidgow@google.com>
Signed-off-by: David Gow <davidgow@google.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
I encountered some occasional crashes of poke_int3_handler() when
kprobes are set, while accessing desc->vec.
The text poke mechanism claims to have an RCU-like behavior, but it
does not appear that there is any quiescent state to ensure that
nobody holds reference to desc. As a result, the following race
appears to be possible, which can lead to memory corruption.
CPU0 CPU1
---- ----
text_poke_bp_batch()
-> smp_store_release(&bp_desc, &desc)
[ notice that desc is on
the stack ]
poke_int3_handler()
[ int3 might be kprobe's
so sync events are do not
help ]
-> try_get_desc(descp=&bp_desc)
desc = __READ_ONCE(bp_desc)
if (!desc) [false, success]
WRITE_ONCE(bp_desc, NULL);
atomic_dec_and_test(&desc.refs)
[ success, desc space on the stack
is being reused and might have
non-zero value. ]
arch_atomic_inc_not_zero(&desc->refs)
[ might succeed since desc points to
stack memory that was freed and might
be reused. ]
Fix this issue with small backportable patch. Instead of trying to
make RCU-like behavior for bp_desc, just eliminate the unnecessary
level of indirection of bp_desc, and hold the whole descriptor as a
global. Anyhow, there is only a single descriptor at any given
moment.
Fixes: 1f676247f36a4 ("x86/alternatives: Implement a better poke_int3_handler() completion scheme")
Signed-off-by: Nadav Amit <namit@vmware.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@kernel.org
Link: https://lkml.kernel.org/r/20220920224743.3089-1-namit@vmware.com
cpu idle hardware workaround.
* A new Intel model number. Folks like these upstream as soon as
possible so that each developer doing feature development doesn't
need to carry their own #define.
* SGX fixes for a userspace crash and a rare kernel warning
-----BEGIN PGP SIGNATURE-----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=ULl1
-----END PGP SIGNATURE-----
Merge tag 'x86_urgent_for_v6.0-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Dave Hansen:
- A performance fix for recent large AMD systems that avoids an ancient
cpu idle hardware workaround
- A new Intel model number. Folks like these upstream as soon as
possible so that each developer doing feature development doesn't
need to carry their own #define
- SGX fixes for a userspace crash and a rare kernel warning
* tag 'x86_urgent_for_v6.0-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
ACPI: processor idle: Practically limit "Dummy wait" workaround to old Intel systems
x86/sgx: Handle VA page allocation failure for EAUG on PF.
x86/sgx: Do not fail on incomplete sanitization on premature stop of ksgxd
x86/cpu: Add CPU model numbers for Meteor Lake
cycle, 18 are for earlier issues, and are cc:stable.
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCYzH+NgAKCRDdBJ7gKXxA
ju4AAQDrFWErVp+ra5P66SSbiFmm8NAW1awt4nHwAPcihNf3yQD/eQcB3w2q0Dm1
9HjsyEVkTYIeaJSAbCraDnMwUdWTIgY=
=p5+0
-----END PGP SIGNATURE-----
Merge tag 'mm-hotfixes-stable-2022-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull last (?) hotfixes from Andrew Morton:
"26 hotfixes.
8 are for issues which were introduced during this -rc cycle, 18 are
for earlier issues, and are cc:stable"
* tag 'mm-hotfixes-stable-2022-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (26 commits)
x86/uaccess: avoid check_object_size() in copy_from_user_nmi()
mm/page_isolation: fix isolate_single_pageblock() isolation behavior
mm,hwpoison: check mm when killing accessing process
mm/hugetlb: correct demote page offset logic
mm: prevent page_frag_alloc() from corrupting the memory
mm: bring back update_mmu_cache() to finish_fault()
frontswap: don't call ->init if no ops are registered
mm/huge_memory: use pfn_to_online_page() in split_huge_pages_all()
mm: fix madivse_pageout mishandling on non-LRU page
powerpc/64s/radix: don't need to broadcast IPI for radix pmd collapse flush
mm: gup: fix the fast GUP race against THP collapse
mm: fix dereferencing possible ERR_PTR
vmscan: check folio_test_private(), not folio_get_private()
mm: fix VM_BUG_ON in __delete_from_swap_cache()
tools: fix compilation after gfp_types.h split
mm/damon/dbgfs: fix memory leak when using debugfs_lookup()
mm/migrate_device.c: copy pte dirty bit to page
mm/migrate_device.c: add missing flush_cache_page()
mm/migrate_device.c: flush TLB while holding PTL
x86/mm: disable instrumentations of mm/pgprot.c
...
The check_object_size() helper under CONFIG_HARDENED_USERCOPY is designed
to skip any checks where the length is known at compile time as a
reasonable heuristic to avoid "likely known-good" cases. However, it can
only do this when the copy_*_user() helpers are, themselves, inline too.
Using find_vmap_area() requires taking a spinlock. The
check_object_size() helper can call find_vmap_area() when the destination
is in vmap memory. If show_regs() is called in interrupt context, it will
attempt a call to copy_from_user_nmi(), which may call check_object_size()
and then find_vmap_area(). If something in normal context happens to be
in the middle of calling find_vmap_area() (with the spinlock held), the
interrupt handler will hang forever.
The copy_from_user_nmi() call is actually being called with a fixed-size
length, so check_object_size() should never have been called in the first
place. Given the narrow constraints, just replace the
__copy_from_user_inatomic() call with an open-coded version that calls
only into the sanitizers and not check_object_size(), followed by a call
to raw_copy_from_user().
[akpm@linux-foundation.org: no instrument_copy_from_user() in my tree...]
Link: https://lkml.kernel.org/r/20220919201648.2250764-1-keescook@chromium.org
Link: https://lore.kernel.org/all/CAOUHufaPshtKrTWOz7T7QFYUNVGFm0JBjvM700Nhf9qEL9b3EQ@mail.gmail.com
Fixes: 0aef499f3172 ("mm/usercopy: Detect vmalloc overruns")
Signed-off-by: Kees Cook <keescook@chromium.org>
Reported-by: Yu Zhao <yuzhao@google.com>
Reported-by: Florian Lehner <dev@der-flo.net>
Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Florian Lehner <dev@der-flo.net>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Clang produces a false positive when building with CONFIG_FORTIFY_SOURCE=y
and CONFIG_UBSAN_BOUNDS=y when operating on an array with a dynamic
offset. Work around this by using a direct assignment of an empty
instance. Avoids this warning:
../include/linux/fortify-string.h:309:4: warning: call to __write_overflow_field declared with 'warn
ing' attribute: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Wat
tribute-warning]
__write_overflow_field(p_size_field, size);
^
which was isolated to the memset() call in xen_load_idt().
Note that this looks very much like another bug that was worked around:
https://github.com/ClangBuiltLinux/linux/issues/1592
Cc: Juergen Gross <jgross@suse.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: x86@kernel.org
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: xen-devel@lists.xenproject.org
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/lkml/41527d69-e8ab-3f86-ff37-6b298c01d5bc@oracle.com
Signed-off-by: Kees Cook <keescook@chromium.org>
With CONFIG_CFI_CLANG, assembly functions indirectly called
from C code must be annotated with type identifiers to pass CFI
checking. Define the __CFI_TYPE helper macro to match the compiler
generated function preamble, and ensure SYM_TYPED_FUNC_START also
emits ENDBR with IBT.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Kees Cook <keescook@chromium.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220908215504.3686827-21-samitolvanen@google.com
The compiler generates __kcfi_typeid_ symbols for annotating assembly
functions with type information. These are constants that can be
referenced in assembly code and are resolved by the linker. Ignore
them in relocs.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Kees Cook <keescook@chromium.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220908215504.3686827-20-samitolvanen@google.com
In preparation for removing CC_FLAGS_CFI from CC_FLAGS_LTO, explicitly
filter out CC_FLAGS_CFI in all the makefiles where we currently filter
out CC_FLAGS_LTO.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Kees Cook <keescook@chromium.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220908215504.3686827-2-samitolvanen@google.com
* Fix for kmemleak with pKVM
s390:
* Fixes for VFIO with zPCI
* smatch fix
x86:
* Ensure XSAVE-capable hosts always allow FP and SSE state to be saved
and restored via KVM_{GET,SET}_XSAVE
* Fix broken max_mmu_rmap_size stat
* Fix compile error with old glibc that doesn't have gettid()
-----BEGIN PGP SIGNATURE-----
iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmMtvg4UHHBib256aW5p
QHJlZGhhdC5jb20ACgkQv/vSX3jHroNy2Af/VybWK2uAbaMkV6irQ1YTJIrRPco1
C+JQdiQklYbjzThfPWNF/MiH+VTObloR1KqztOeQbfcrgwzygO68D3bs0wkAukLA
mtdcMjdsqNx8r9u533i6S8Dpo0RkHKl+I8+3mHdPHTzlrbCuYJFFFxFNLhE+xbrK
DP2Gl/xXIGYwOv2nfHA/xxI7TRICv4IxmzQazxlmC27n6BLNSr8qp6jI9lXJQfJ8
XJh3SbmRux3/cs2oEqONg8DySJh631kI1jGGOmL3qk07ZR7A5KZ+lju0xM7vQIEq
aR25YNYZux+BPIY/WxT1R0j6pwinBmFp8OoQYCs8DaQ65fdE5gegtJRpow==
=VADm
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"As everyone back came back from conferences, here are the pending
patches for Linux 6.0.
ARM:
- Fix for kmemleak with pKVM
s390:
- Fixes for VFIO with zPCI
- smatch fix
x86:
- Ensure XSAVE-capable hosts always allow FP and SSE state to be
saved and restored via KVM_{GET,SET}_XSAVE
- Fix broken max_mmu_rmap_size stat
- Fix compile error with old glibc that doesn't have gettid()"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: x86: Inject #UD on emulated XSETBV if XSAVES isn't enabled
KVM: x86: Always enable legacy FP/SSE in allowed user XFEATURES
KVM: x86: Reinstate kvm_vcpu_arch.guest_supported_xcr0
KVM: x86/mmu: add missing update to max_mmu_rmap_size
selftests: kvm: Fix a compile error in selftests/kvm/rseq_test.c
KVM: s390: pci: register pci hooks without interpretation
KVM: s390: pci: fix GAIT physical vs virtual pointers usage
KVM: s390: Pass initialized arg even if unused
KVM: s390: pci: fix plain integer as NULL pointer warnings
KVM: arm64: Use kmemleak_free_part_phys() to unregister hyp_mem_base
Fix for a code analyser warning
-----BEGIN PGP SIGNATURE-----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=Z7gl
-----END PGP SIGNATURE-----
Merge tag 'kvm-s390-master-6.0-2' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD
More pci fixes
Fix for a code analyser warning
Inject #UD when emulating XSETBV if CR4.OSXSAVE is not set. This also
covers the "XSAVE not supported" check, as setting CR4.OSXSAVE=1 #GPs if
XSAVE is not supported (and userspace gets to keep the pieces if it
forces incoherent vCPU state).
Add a comment to kvm_emulate_xsetbv() to call out that the CPU checks
CR4.OSXSAVE before checking for intercepts. AMD'S APM implies that #UD
has priority (says that intercepts are checked before #GP exceptions),
while Intel's SDM says nothing about interception priority. However,
testing on hardware shows that both AMD and Intel CPUs prioritize the #UD
over interception.
Fixes: 02d4160fbd76 ("x86: KVM: add xsetbv to the emulator")
Cc: stable@vger.kernel.org
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220824033057.3576315-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Allow FP and SSE state to be saved and restored via KVM_{G,SET}_XSAVE on
XSAVE-capable hosts even if their bits are not exposed to the guest via
XCR0.
Failing to allow FP+SSE first showed up as a QEMU live migration failure,
where migrating a VM from a pre-XSAVE host, e.g. Nehalem, to an XSAVE
host failed due to KVM rejecting KVM_SET_XSAVE. However, the bug also
causes problems even when migrating between XSAVE-capable hosts as
KVM_GET_SAVE won't set any bits in user_xfeatures if XSAVE isn't exposed
to the guest, i.e. KVM will fail to actually migrate FP+SSE.
Because KVM_{G,S}ET_XSAVE are designed to allowing migrating between
hosts with and without XSAVE, KVM_GET_XSAVE on a non-XSAVE (by way of
fpu_copy_guest_fpstate_to_uabi()) always sets the FP+SSE bits in the
header so that KVM_SET_XSAVE will work even if the new host supports
XSAVE.
Fixes: ad856280ddea ("x86/kvm/fpu: Limit guest user_xfeatures to supported bits of XCR0")
bz: https://bugzilla.redhat.com/show_bug.cgi?id=2079311
Cc: stable@vger.kernel.org
Cc: Leonardo Bras <leobras@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
[sean: add comment, massage changelog]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220824033057.3576315-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reinstate the per-vCPU guest_supported_xcr0 by partially reverting
commit 988896bb6182; the implicit assessment that guest_supported_xcr0 is
always the same as guest_fpu.fpstate->user_xfeatures was incorrect.
kvm_vcpu_after_set_cpuid() isn't the only place that sets user_xfeatures,
as user_xfeatures is set to fpu_user_cfg.default_features when guest_fpu
is allocated via fpu_alloc_guest_fpstate() => __fpstate_reset().
guest_supported_xcr0 on the other hand is zero-allocated. If userspace
never invokes KVM_SET_CPUID2, supported XCR0 will be '0', whereas the
allowed user XFEATURES will be non-zero.
Practically speaking, the edge case likely doesn't matter as no sane
userspace will live migrate a VM without ever doing KVM_SET_CPUID2. The
primary motivation is to prepare for KVM intentionally and explicitly
setting bits in user_xfeatures that are not set in guest_supported_xcr0.
Because KVM_{G,S}ET_XSAVE can be used to svae/restore FP+SSE state even
if the host doesn't support XSAVE, KVM needs to set the FP+SSE bits in
user_xfeatures even if they're not allowed in XCR0, e.g. because XCR0
isn't exposed to the guest. At that point, the simplest fix is to track
the two things separately (allowed save/restore vs. allowed XCR0).
Fixes: 988896bb6182 ("x86/kvm/fpu: Remove kvm_vcpu_arch.guest_supported_xcr0")
Cc: stable@vger.kernel.org
Cc: Leonardo Bras <leobras@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220824033057.3576315-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The update to statistic max_mmu_rmap_size is unintentionally removed by
commit 4293ddb788c1 ("KVM: x86/mmu: Remove redundant spte present check
in mmu_set_spte"). Add missing update to it or max_mmu_rmap_size will
always be nonsensical 0.
Fixes: 4293ddb788c1 ("KVM: x86/mmu: Remove redundant spte present check in mmu_set_spte")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Message-Id: <20220907080657.42898-1-linmiaohe@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Since binutils 2.39, ld will print a warning if any stack section is
executable, which is the default for stack sections on files without a
.note.GNU-stack section.
This was fixed for x86 in commit ffcf9c5700e4 ("x86: link vdso and boot with -z noexecstack --no-warn-rwx-segments"),
but remained broken for UML, resulting in several warnings:
/usr/bin/ld: warning: arch/x86/um/vdso/vdso.o: missing .note.GNU-stack section implies executable stack
/usr/bin/ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
/usr/bin/ld: warning: .tmp_vmlinux.kallsyms1 has a LOAD segment with RWX permissions
/usr/bin/ld: warning: .tmp_vmlinux.kallsyms1.o: missing .note.GNU-stack section implies executable stack
/usr/bin/ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
/usr/bin/ld: warning: .tmp_vmlinux.kallsyms2 has a LOAD segment with RWX permissions
/usr/bin/ld: warning: .tmp_vmlinux.kallsyms2.o: missing .note.GNU-stack section implies executable stack
/usr/bin/ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
/usr/bin/ld: warning: vmlinux has a LOAD segment with RWX permissions
Link both the VDSO and vmlinux with -z noexecstack, fixing the warnings
about .note.GNU-stack sections. In addition, pass --no-warn-rwx-segments
to dodge the remaining warnings about LOAD segments with RWX permissions
in the kallsyms objects. (Note that this flag is apparently not
available on lld, so hide it behind a test for BFD, which is what the
x86 patch does.)
Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ffcf9c5700e49c0aee42dcba9a12ba21338e8136
Link: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=ba951afb99912da01a6e8434126b8fac7aa75107
Signed-off-by: David Gow <davidgow@google.com>
Reviewed-by: Lukas Straub <lukasstraub2@web.de>
Tested-by: Lukas Straub <lukasstraub2@web.de>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: Richard Weinberger <richard@nod.at>
arch.tls_array is statically allocated so checking for NULL doesn't
make sense. This causes the compiler warning below.
Remove the checks to silence these warnings.
../arch/x86/um/tls_32.c: In function 'get_free_idx':
../arch/x86/um/tls_32.c:68:13: warning: the comparison will always evaluate as 'true' for the address of 'tls_array' will never be NULL [-Waddress]
68 | if (!t->arch.tls_array)
| ^
In file included from ../arch/x86/um/asm/processor.h:10,
from ../include/linux/rcupdate.h:30,
from ../include/linux/rculist.h:11,
from ../include/linux/pid.h:5,
from ../include/linux/sched.h:14,
from ../arch/x86/um/tls_32.c:7:
../arch/x86/um/asm/processor_32.h:22:31: note: 'tls_array' declared here
22 | struct uml_tls_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
| ^~~~~~~~~
../arch/x86/um/tls_32.c: In function 'get_tls_entry':
../arch/x86/um/tls_32.c:243:13: warning: the comparison will always evaluate as 'true' for the address of 'tls_array' will never be NULL [-Waddress]
243 | if (!t->arch.tls_array)
| ^
../arch/x86/um/asm/processor_32.h:22:31: note: 'tls_array' declared here
22 | struct uml_tls_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
| ^~~~~~~~~
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: Richard Weinberger <richard@nod.at>
Like in f4f03f299a56ce4d73c5431e0327b3b6cb55ebb9
"um: Cleanup syscall_handler_t definition/cast, fix warning",
remove the cast to to fix the compiler warning.
Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: Richard Weinberger <richard@nod.at>
Commit 4867fbbdd6b3 ("x86/mm: move protection_map[] inside the platform")
moved accesses to protection_map[] from mem_encrypt_amd.c to pgprot.c. As
a result, the accesses are now targets of KASAN (and other
instrumentations), leading to the crash during the boot process.
Disable the instrumentations for pgprot.c like commit 67bb8e999e0a
("x86/mm: Disable various instrumentations of mm/mem_encrypt.c and
mm/tlb.c").
Before this patch, my AMD machine cannot boot since v6.0-rc1 with KASAN
enabled, without anything printed. After the change, it successfully
boots up.
Fixes: 4867fbbdd6b3 ("x86/mm: move protection_map[] inside the platform")
Link: https://lkml.kernel.org/r/20220824084726.2174758-1-naohiro.aota@wdc.com
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Just one fixup patch, reworking the softirq_on_own_stack logic for
preempt-rt kernels as discussed in
https://lore.kernel.org/all/CAHk-=wgZSD3W2y6yczad2Am=EfHYyiPzTn3CfXxrriJf9i5W5w@mail.gmail.com/
-----BEGIN PGP SIGNATURE-----
iQIzBAABCgAdFiEEo6/YBQwIrVS28WGKmmx57+YAGNkFAmMZ/FUACgkQmmx57+YA
GNl4DBAAutecM/RGJnK//0+NEcCsuHoIWusifeEIhR8yNFxm1UOiwBNYV4M/73UA
x2lLGQCu4ze1zSU3BXX1Ug3MfpmrBOhlsW2+x7j0b3tG9vXpvojitTsCPo6lgNDu
nUx58rtN0wfZgwT7c4DaueEL1aIZ1yUOgCE+SCGw3subgpZeoaYUi3sbZxI2K+T8
MnzcVVpmccMaxLh0xwCn6u4csYrarj0XodY11a8+DAN9Afek9nEq4UNhIewjvQw0
2OTbGuxIBZoXNmWdjcDBO97eUtq0oJcRIgPkRi0xlas2hzRJMwO6liqsA34r4r7r
Irxyyw4//jlCtJOKwrv+rSxR6ULvGw2+UBk/Q/nYeN9hL2qKnwJIa8hryj+cQ/os
KWclMGEYtKvOzciMIvViXAOY4sa7jZO1Q9rntyUIVkNiqQqLDRxocW+GjsqG5KZI
bl+akScQhX3a7bEZePO0EJqfitjaxk5JtxF3KcV5apKaWto+EwOpvRf6eUVT97/n
Zpoy2dBygOtWiMJR7o143xeOQlhutDCOh6VeDfJiUA57ekABRY/8+R+ZltkmDP84
4iCCtE4oWuMXz390ybBHxKcNjiknLUMvDUNq5wfjsyJ8ftBRF+1+vKR+BdLqsx8O
d5/FjRXC5MWaW4GLO89l+MZh+BrOkobdq333VxIStpS9Jd0pUa4=
=0A1T
-----END PGP SIGNATURE-----
Merge tag 'asm-generic-fixes-6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull SOFTIRQ_ON_OWN_STACK rework from Arnd Bergmann:
"Just one fixup patch, reworking the softirq_on_own_stack logic for
preempt-rt kernels as discussed in
https://lore.kernel.org/all/CAHk-=wgZSD3W2y6yczad2Am=EfHYyiPzTn3CfXxrriJf9i5W5w@mail.gmail.com/"
* tag 'asm-generic-fixes-6.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
asm-generic: Conditionally enable do_softirq_own_stack() via Kconfig.
VM_FAULT_NOPAGE is expected behaviour for -EBUSY failure path, when
augmenting a page, as this means that the reclaimer thread has been
triggered, and the intention is just to round-trip in ring-3, and
retry with a new page fault.
Fixes: 5a90d2c3f5ef ("x86/sgx: Support adding of pages to an initialized enclave")
Signed-off-by: Haitao Huang <haitao.huang@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Vijay Dhanraj <vijay.dhanraj@intel.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20220906000221.34286-3-jarkko@kernel.org
Unsanitized pages trigger WARN_ON() unconditionally, which can panic the
whole computer, if /proc/sys/kernel/panic_on_warn is set.
In sgx_init(), if misc_register() fails or misc_register() succeeds but
neither sgx_drv_init() nor sgx_vepc_init() succeeds, then ksgxd will be
prematurely stopped. This may leave unsanitized pages, which will result a
false warning.
Refine __sgx_sanitize_pages() to return:
1. Zero when the sanitization process is complete or ksgxd has been
requested to stop.
2. The number of unsanitized pages otherwise.
Fixes: 51ab30eb2ad4 ("x86/sgx: Replace section->init_laundry_list with sgx_dirty_page_list")
Reported-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/linux-sgx/20220825051827.246698-1-jarkko@kernel.org/T/#u
Link: https://lkml.kernel.org/r/20220906000221.34286-2-jarkko@kernel.org
Current i10nm_edac only supports firmware decoder (ACPI DSM methods).
MCA bank registers of Ice Lake or Tremont CPUs contain the information
to decode DDR memory errors. To get better decoding performance, add
the driver decoder (decoding DDR memory errors via extracting error
information from MCA bank registers) for Ice Lake and Tremont CPUs.
Co-developed-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Youquan Song <youquan.song@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/all/20220901194310.115427-1-tony.luck@intel.com/
Remove the CONFIG_PREEMPT_RT symbol from the ifdef around
do_softirq_own_stack() and move it to Kconfig instead.
Enable softirq stacks based on SOFTIRQ_ON_OWN_STACK which depends on
HAVE_SOFTIRQ_ON_OWN_STACK and its default value is set to !PREEMPT_RT.
This ensures that softirq stacks are not used on PREEMPT_RT and avoids
a 'select' statement on an option which has a 'depends' statement.
Link: https://lore.kernel.org/YvN5E%2FPrHfUhggr7@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
An invalid argument to KVM_SET_MP_STATE has no effect other than making the
vCPU fail to run at the next KVM_RUN. Since it is extremely unlikely that
any userspace is relying on it, fail with -EINVAL just like for other
architectures.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
When a guest PEBS counter is cross-mapped by a host counter, software
will remove the corresponding bit in the arr[global_ctrl].guest and
expect hardware to perform a change of state "from enable to disable"
via the msr_slot[] switch during the vmx transaction.
The real world is that if user adjust the counter overflow value small
enough, it still opens a tiny race window for the previously PEBS-enabled
counter to write cross-mapped PEBS records into the guest's PEBS buffer,
when arr[global_ctrl].guest has been prioritised (switch_msr_special stuff)
to switch into the enabled state, while the arr[pebs_enable].guest has not.
Close this window by clearing invalid bits in the arr[global_ctrl].guest.
Cc: linux-perf-users@vger.kernel.org
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sean Christopherson <seanjc@google.com>
Fixes: 854250329c02 ("KVM: x86/pmu: Disable guest PEBS temporarily in two rare situations")
Signed-off-by: Like Xu <likexu@tencent.com>
Message-Id: <20220831033524.58561-1-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
When allocating memory for mci_ctl2_banks fails, KVM doesn't release
mce_banks leading to memoryleak. Fix this issue by calling kfree()
for it when kcalloc() fails.
Fixes: 281b52780b57 ("KVM: x86: Add emulation for MSR_IA32_MCx_CTL2 MSRs.")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Message-Id: <20220901122300.22298-1-linmiaohe@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM should not claim to virtualize unknown IA32_ARCH_CAPABILITIES
bits. When kvm_get_arch_capabilities() was originally written, there
were only a few bits defined in this MSR, and KVM could virtualize all
of them. However, over the years, several bits have been defined that
KVM cannot just blindly pass through to the guest without additional
work (such as virtualizing an MSR promised by the
IA32_ARCH_CAPABILITES feature bit).
Define a mask of supported IA32_ARCH_CAPABILITIES bits, and mask off
any other bits that are set in the hardware MSR.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Fixes: 5b76a3cff011 ("KVM: VMX: Tell the nested hypervisor to skip L1D flush on vmentry")
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Vipin Sharma <vipinsh@google.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-Id: <20220830174947.2182144-1-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
When a guest PEBS counter is cross-mapped by a host counter, software
will remove the corresponding bit in the arr[global_ctrl].guest and
expect hardware to perform a change of state "from enable to disable"
via the msr_slot[] switch during the vmx transaction.
The real world is that if user adjust the counter overflow value small
enough, it still opens a tiny race window for the previously PEBS-enabled
counter to write cross-mapped PEBS records into the guest's PEBS buffer,
when arr[global_ctrl].guest has been prioritised (switch_msr_special stuff)
to switch into the enabled state, while the arr[pebs_enable].guest has not.
Close this window by clearing invalid bits in the arr[global_ctrl].guest.
Fixes: 854250329c02 ("KVM: x86/pmu: Disable guest PEBS temporarily in two rare situations")
Signed-off-by: Like Xu <likexu@tencent.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220831033524.58561-1-likexu@tencent.com
For some Alder Lake N machine, the below unchecked MSR access error may be
triggered.
[ 0.088017] rcu: Hierarchical SRCU implementation.
[ 0.088017] unchecked MSR access error: WRMSR to 0x38f (tried to write
0x0001000f0000003f) at rIP: 0xffffffffb5684de8 (native_write_msr+0x8/0x30)
[ 0.088017] Call Trace:
[ 0.088017] <TASK>
[ 0.088017] __intel_pmu_enable_all.constprop.46+0x4a/0xa0
The Alder Lake N only has e-cores. The X86_FEATURE_HYBRID_CPU flag is
not set. The perf cannot retrieve the correct CPU type via
get_this_hybrid_cpu_type(). The model specific get_hybrid_cpu_type() is
hardcode to p-core. The wrong CPU type is given to the PMU of the
Alder Lake N.
Since Alder Lake N isn't in fact a hybrid CPU, remove ALDERLAKE_N from
the rest of {ALDER,RAPTOP}LAKE and create a non-hybrid PMU setup.
The differences between Gracemont and the previous Tremont are,
- Number of GP counters
- Load and store latency Events
- PEBS event_constraints
- Instruction Latency support
- Data source encoding
- Memory access latency encoding
Fixes: c2a960f7c574 ("perf/x86: Add new Alder Lake and Raptor Lake support")
Reported-by: Jianfeng Gao <jianfeng.gao@intel.com>
Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220831142702.153110-1-kan.liang@linux.intel.com
- Fix PAT on Xen, which caused i915 driver failures
- Fix compat INT 80 entry crash on Xen PV guests
- Fix 'MMIO Stale Data' mitigation status reporting on older Intel CPUs
- Fix RSB stuffing regressions
- Fix ORC unwinding on ftrace trampolines
- Add Intel Raptor Lake CPU model number
- Fix (work around) a SEV-SNP bootloader bug providing bogus values in
boot_params->cc_blob_address, by ignoring the value on !SEV-SNP bootups.
- Fix SEV-SNP early boot failure
- Fix the objtool list of noreturn functions and annotate snp_abort(),
which bug confused objtool on gcc-12.
- Fix the documentation for retbleed
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=ZpCJ
-----END PGP SIGNATURE-----
Merge tag 'x86-urgent-2022-08-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull misc x86 fixes from Ingo Molnar:
- Fix PAT on Xen, which caused i915 driver failures
- Fix compat INT 80 entry crash on Xen PV guests
- Fix 'MMIO Stale Data' mitigation status reporting on older Intel CPUs
- Fix RSB stuffing regressions
- Fix ORC unwinding on ftrace trampolines
- Add Intel Raptor Lake CPU model number
- Fix (work around) a SEV-SNP bootloader bug providing bogus values in
boot_params->cc_blob_address, by ignoring the value on !SEV-SNP
bootups.
- Fix SEV-SNP early boot failure
- Fix the objtool list of noreturn functions and annotate snp_abort(),
which bug confused objtool on gcc-12.
- Fix the documentation for retbleed
* tag 'x86-urgent-2022-08-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
Documentation/ABI: Mention retbleed vulnerability info file for sysfs
x86/sev: Mark snp_abort() noreturn
x86/sev: Don't use cc_platform_has() for early SEV-SNP calls
x86/boot: Don't propagate uninitialized boot_params->cc_blob_address
x86/cpu: Add new Raptor Lake CPU model number
x86/unwind/orc: Unwind ftrace trampolines with correct ORC entry
x86/nospec: Fix i386 RSB stuffing
x86/nospec: Unwreck the RSB stuffing
x86/bugs: Add "unknown" reporting for MMIO Stale Data
x86/entry: Fix entry_INT80_compat for Xen PV guests
x86/PAT: Have pat_enabled() properly reflect state when running on Xen
PEBS constraints fix on Alder Lake CPUs and an Intel uncore PMU fix.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=I/UD
-----END PGP SIGNATURE-----
Merge tag 'perf-urgent-2022-08-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 perf fixes from Ingo Molnar:
"Misc fixes: an Arch-LBR fix, a PEBS enumeration fix, an Intel DS fix,
PEBS constraints fix on Alder Lake CPUs and an Intel uncore PMU fix"
* tag 'perf-urgent-2022-08-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel/uncore: Fix broken read_counter() for SNB IMC PMU
perf/x86/intel: Fix pebs event constraints for ADL
perf/x86/intel/ds: Fix precise store latency handling
perf/x86/core: Set pebs_capable and PMU_FL_PEBS_ALL for the Baseline
perf/x86/lbr: Enable the branch type for the Arch LBR by default
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQRTLbB6QfY48x44uB6AXGG7T9hjvgUCYwnVogAKCRCAXGG7T9hj
vkvCAP97gXbhilg8GkmhSgwsn8XAnR3PFWonR+PA/NBQwsrx4AD/by18f7ICyOCl
/r2PHDjYSiyMjwBSjrdm5Uo/kNBaqAM=
=cIk8
-----END PGP SIGNATURE-----
Merge tag 'for-linus-6.0-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
- two minor cleanups
- a fix of the xen/privcmd driver avoiding a possible NULL dereference
in an error case
* tag 'for-linus-6.0-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/privcmd: fix error exit of privcmd_ioctl_dm_op()
xen: move from strlcpy with unused retval to strscpy
xen: x86: remove setting the obsolete config XEN_MAX_DOMAIN_MEMORY
