Commit Graph

1123455 Commits

Author SHA1 Message Date
Daniel Xu
e4b69cb9a9 scripts: add is_rust_module.sh
This script is used to detect whether a kernel module is written
in Rust.

It will later be used to disable BTF generation on Rust modules as
BTF does not yet support Rust.

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>
Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
Co-developed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 09:02:06 +02:00
Miguel Ojeda
78521f3399 scripts: add rust_is_available.sh
This script tests whether the Rust toolchain requirements are in place
to enable Rust support. It uses `min-tool-version.sh` to fetch
the version numbers.

The build system will call it to set `CONFIG_RUST_IS_AVAILABLE` in
a later patch.

It also has an option (`-v`) to explain what is missing, which is
useful to set up the development environment. This is used via
the `make rustavailable` target added in a later patch.

Reviewed-by: Kees Cook <keescook@chromium.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: Finn Behrens <me@kloenk.de>
Signed-off-by: Finn Behrens <me@kloenk.de>
Co-developed-by: Miguel Cano <macanroj@gmail.com>
Signed-off-by: Miguel Cano <macanroj@gmail.com>
Co-developed-by: Tiago Lam <tiagolam@gmail.com>
Signed-off-by: Tiago Lam <tiagolam@gmail.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 09:02:06 +02:00
Miguel Ojeda
9a8ff24ce5 scripts: add generate_rust_target.rs
This script takes care of generating the custom target specification
file for `rustc`, based on the kernel configuration.

It also serves as an example of a Rust host program.

A dummy architecture is kept in this patch so that a later patch
adds x86 support on top with as few changes as possible.

Reviewed-by: Kees Cook <keescook@chromium.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>
2022-09-28 09:02:06 +02:00
Miguel Ojeda
8c4555ccc5 scripts: add generate_rust_analyzer.py
The `generate_rust_analyzer.py` script generates the configuration
file (`rust-project.json`) for rust-analyzer.

rust-analyzer is a modular compiler frontend for the Rust language.
It provides an LSP server which can be used in editors such as
VS Code, Emacs or Vim.

Reviewed-by: Kees Cook <keescook@chromium.org>
Co-developed-by: Alex Gaynor <alex.gaynor@gmail.com>
Signed-off-by: Alex Gaynor <alex.gaynor@gmail.com>
Co-developed-by: Finn Behrens <me@kloenk.de>
Signed-off-by: Finn Behrens <me@kloenk.de>
Co-developed-by: Wedson Almeida Filho <wedsonaf@google.com>
Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com>
Co-developed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Gary Guo <gary@garyguo.net>
Co-developed-by: Boris-Chengbiao Zhou <bobo1239@web.de>
Signed-off-by: Boris-Chengbiao Zhou <bobo1239@web.de>
Co-developed-by: Björn Roy Baron <bjorn3_gh@protonmail.com>
Signed-off-by: Björn Roy Baron <bjorn3_gh@protonmail.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 09:02:06 +02:00
Miguel Ojeda
99115db4ec scripts: decode_stacktrace: demangle Rust symbols
Recent versions of both Binutils (`c++filt`) and LLVM (`llvm-cxxfilt`)
provide Rust v0 mangling support.

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>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 09:01:40 +02:00
Miguel Ojeda
d1d84b5f73 scripts: checkpatch: enable language-independent checks for Rust
Include Rust in the "source code files" category, so that
the language-independent tests are checked for Rust too,
and teach `checkpatch` about the comment style for Rust files.

This enables the malformed SPDX check, the misplaced SPDX license
tag check, the long line checks, the lines without a newline check
and the embedded filename check.

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>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 09:01:15 +02:00
Miguel Ojeda
de48fa1a01 scripts: checkpatch: diagnose uses of %pA in the C side as errors
The `%pA` format specifier is only intended to be used from Rust.

`checkpatch.pl` already gives a warning for invalid specificers:

    WARNING: Invalid vsprintf pointer extension '%pA'

This makes it an error and introduces an explanatory message:

    ERROR: Invalid vsprintf pointer extension '%pA' - '%pA' is only intended to be used from Rust code

Suggested-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: Joe Perches <joe@perches.com>
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 09:00:58 +02:00
Gary Guo
787983da77 vsprintf: add new %pA format specifier
This patch adds a format specifier `%pA` to `vsprintf` which formats
a pointer as `core::fmt::Arguments`. Doing so allows us to directly
format to the internal buffer of `printf`, so we do not have to use
a temporary buffer on the stack to pre-assemble the message on
the Rust side.

This specifier is intended only to be used from Rust and not for C, so
`checkpatch.pl` is intentionally unchanged to catch any misuse.

Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Petr Mladek <pmladek@suse.com>
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>
Signed-off-by: Gary Guo <gary@garyguo.net>
Co-developed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 09:00:20 +02:00
Miguel Ojeda
8fcbf02492 rust: export generated symbols
All symbols are reexported reusing the `EXPORT_SYMBOL_GPL` macro
from C. The lists of symbols are generated on the fly.

There are three main sets of symbols to distinguish:

  - The ones from the `core` and `alloc` crates (from the Rust
    standard library). The code is licensed as Apache/MIT.

  - The ones from our abstractions in the `kernel` crate.

  - The helpers (already exported since they are not generated).

We export everything as GPL. This ensures we do not mistakenly
expose GPL kernel symbols/features as non-GPL, even indirectly.

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: Björn Roy Baron <bjorn3_gh@protonmail.com>
Signed-off-by: Björn Roy Baron <bjorn3_gh@protonmail.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 08:59:52 +02:00
Wedson Almeida Filho
247b365dc8 rust: add kernel crate
The `kernel` crate currently includes all the abstractions that wrap
kernel features written in C.

These abstractions call the C side of the kernel via the generated
bindings with the `bindgen` tool. Modules developed in Rust should
never call the bindings themselves.

In the future, as the abstractions grow in number, we may need
to split this crate into several, possibly following a similar
subdivision in subsystems as the kernel itself and/or moving
the code to the actual subsystems.

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: Geoffrey Thomas <geofft@ldpreload.com>
Signed-off-by: Geoffrey Thomas <geofft@ldpreload.com>
Co-developed-by: Finn Behrens <me@kloenk.de>
Signed-off-by: Finn Behrens <me@kloenk.de>
Co-developed-by: Adam Bratschi-Kaye <ark.email@gmail.com>
Signed-off-by: Adam Bratschi-Kaye <ark.email@gmail.com>
Co-developed-by: Sven Van Asbroeck <thesven73@gmail.com>
Signed-off-by: Sven Van Asbroeck <thesven73@gmail.com>
Co-developed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Gary Guo <gary@garyguo.net>
Co-developed-by: Boris-Chengbiao Zhou <bobo1239@web.de>
Signed-off-by: Boris-Chengbiao Zhou <bobo1239@web.de>
Co-developed-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Co-developed-by: Fox Chen <foxhlchen@gmail.com>
Signed-off-by: Fox Chen <foxhlchen@gmail.com>
Co-developed-by: Viktor Garske <viktor@v-gar.de>
Signed-off-by: Viktor Garske <viktor@v-gar.de>
Co-developed-by: Dariusz Sosnowski <dsosnowski@dsosnowski.pl>
Signed-off-by: Dariusz Sosnowski <dsosnowski@dsosnowski.pl>
Co-developed-by: Léo Lanteri Thauvin <leseulartichaut@gmail.com>
Signed-off-by: Léo Lanteri Thauvin <leseulartichaut@gmail.com>
Co-developed-by: Niklas Mohrin <dev@niklasmohrin.de>
Signed-off-by: Niklas Mohrin <dev@niklasmohrin.de>
Co-developed-by: Milan Landaverde <milan@mdaverde.com>
Signed-off-by: Milan Landaverde <milan@mdaverde.com>
Co-developed-by: Morgan Bartlett <mjmouse9999@gmail.com>
Signed-off-by: Morgan Bartlett <mjmouse9999@gmail.com>
Co-developed-by: Maciej Falkowski <m.falkowski@samsung.com>
Signed-off-by: Maciej Falkowski <m.falkowski@samsung.com>
Co-developed-by: Nándor István Krácser <bonifaido@gmail.com>
Signed-off-by: Nándor István Krácser <bonifaido@gmail.com>
Co-developed-by: David Gow <davidgow@google.com>
Signed-off-by: David Gow <davidgow@google.com>
Co-developed-by: John Baublitz <john.m.baublitz@gmail.com>
Signed-off-by: John Baublitz <john.m.baublitz@gmail.com>
Co-developed-by: Björn Roy Baron <bjorn3_gh@protonmail.com>
Signed-off-by: Björn Roy Baron <bjorn3_gh@protonmail.com>
Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com>
Co-developed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 08:58:24 +02:00
Miguel Ojeda
8326ac05ee rust: add bindings crate
This crate contains the bindings to the C side of the kernel.

Calling C (in general, FFI) is assumed to be unsafe in Rust
and, in many cases, this is accurate. For instance, virtually
all C functions that take a pointer are unsafe since, typically,
it will be dereferenced at some point (and in most cases there
is no way for the callee to check its validity beforehand).

Since one of the goals of using Rust in the kernel is precisely
to avoid unsafe code in "leaf" kernel modules (e.g. drivers),
these bindings should not be used directly by them.

Instead, these bindings need to be wrapped into safe abstractions.
These abstractions provide a safe API that kernel modules can use.
In this way, unsafe code in kernel modules is minimized.

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: Finn Behrens <me@kloenk.de>
Signed-off-by: Finn Behrens <me@kloenk.de>
Co-developed-by: Wedson Almeida Filho <wedsonaf@google.com>
Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com>
Co-developed-by: Sven Van Asbroeck <thesven73@gmail.com>
Signed-off-by: Sven Van Asbroeck <thesven73@gmail.com>
Co-developed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Gary Guo <gary@garyguo.net>
Co-developed-by: Maciej Falkowski <m.falkowski@samsung.com>
Signed-off-by: Maciej Falkowski <m.falkowski@samsung.com>
Co-developed-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Co-developed-by: Björn Roy Baron <bjorn3_gh@protonmail.com>
Signed-off-by: Björn Roy Baron <bjorn3_gh@protonmail.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 08:58:00 +02:00
Miguel Ojeda
1fbde52bde rust: add macros crate
This crate contains all the procedural macros ("proc macros")
shared by all the kernel.

Procedural macros allow to create syntax extensions. They run at
compile-time and can consume as well as produce Rust syntax.

For instance, the `module!` macro that is used by Rust modules
is implemented here. It allows to easily declare the equivalent
information to the `MODULE_*` macros in C modules, e.g.:

    module! {
        type: RustMinimal,
        name: b"rust_minimal",
        author: b"Rust for Linux Contributors",
        description: b"Rust minimal sample",
        license: b"GPL",
    }

Co-developed-by: Alex Gaynor <alex.gaynor@gmail.com>
Signed-off-by: Alex Gaynor <alex.gaynor@gmail.com>
Co-developed-by: Finn Behrens <me@kloenk.de>
Signed-off-by: Finn Behrens <me@kloenk.de>
Co-developed-by: Adam Bratschi-Kaye <ark.email@gmail.com>
Signed-off-by: Adam Bratschi-Kaye <ark.email@gmail.com>
Co-developed-by: Wedson Almeida Filho <wedsonaf@google.com>
Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com>
Co-developed-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Co-developed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Gary Guo <gary@garyguo.net>
Co-developed-by: Matthew Bakhtiari <dev@mtbk.me>
Signed-off-by: Matthew Bakhtiari <dev@mtbk.me>
Co-developed-by: Björn Roy Baron <bjorn3_gh@protonmail.com>
Signed-off-by: Björn Roy Baron <bjorn3_gh@protonmail.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 08:58:00 +02:00
Miguel Ojeda
db958dcf88 rust: add compiler_builtins crate
Rust provides `compiler_builtins` as a port of LLVM's `compiler-rt`.
Since we do not need the vast majority of them, we avoid the
dependency by providing our own crate.

Reviewed-by: Kees Cook <keescook@chromium.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: Sven Van Asbroeck <thesven73@gmail.com>
Signed-off-by: Sven Van Asbroeck <thesven73@gmail.com>
Co-developed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 08:58:00 +02:00
Miguel Ojeda
057b8d2571 rust: adapt alloc crate to the kernel
This customizes the subset of the Rust standard library `alloc` that
was just imported as-is, mainly by:

  - Adding SPDX license identifiers.

  - Skipping modules (e.g. `rc` and `sync`) via new `cfg`s.

  - Adding fallible (`try_*`) versions of existing infallible methods
    (i.e. returning a `Result` instead of panicking).

    Since the standard library requires stable/unstable attributes,
    these additions are annotated with:

        #[stable(feature = "kernel", since = "1.0.0")]

    Using "kernel" as the feature allows to have the additions
    clearly marked. The "1.0.0" version is just a placeholder.

    (At the moment, only one is needed, but in the future more
    fallible methods will be added).

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: Gary Guo <gary@garyguo.net>
Signed-off-by: Gary Guo <gary@garyguo.net>
Co-developed-by: Matthew Bakhtiari <dev@mtbk.me>
Signed-off-by: Matthew Bakhtiari <dev@mtbk.me>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 08:57:01 +02:00
Miguel Ojeda
753dece88d rust: import upstream alloc crate
This is a subset of the Rust standard library `alloc` crate,
version 1.62.0, licensed under "Apache-2.0 OR MIT", from:

    https://github.com/rust-lang/rust/tree/1.62.0/library/alloc/src

The files are copied as-is, with no modifications whatsoever
(not even adding the SPDX identifiers).

For copyright details, please see:

    https://github.com/rust-lang/rust/blob/1.62.0/COPYRIGHT

The next patch modifies these files as needed for use within
the kernel. This patch split allows reviewers to double-check
the import and to clearly see the differences introduced.

Vendoring `alloc`, at least for the moment, allows us to have fallible
allocations support (i.e. the `try_*` versions of methods which return
a `Result` instead of panicking) early on. It also gives a bit more
freedom to experiment with new interfaces and to iterate quickly.

Eventually, the goal is to have everything the kernel needs in
upstream `alloc` and drop it from the kernel tree.

For a summary of work on `alloc` happening upstream, please see:

    https://github.com/Rust-for-Linux/linux/issues/408

The following script may be used to verify the contents:

    for path in $(cd rust/alloc/ && find . -type f -name '*.rs'); do
        curl --silent --show-error --location \
            https://github.com/rust-lang/rust/raw/1.62.0/library/alloc/src/$path \
            | diff --unified rust/alloc/$path - && echo $path: OK
    done

Reviewed-by: Kees Cook <keescook@chromium.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>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 08:57:01 +02:00
Miguel Ojeda
12f577216a rust: add C helpers
Introduces the source file that will contain forwarders to C macros
and inlined functions.

Initially this only contains a single helper, but will gain more as
more functionality is added to the `kernel` crate in the future.

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: Geoffrey Thomas <geofft@ldpreload.com>
Signed-off-by: Geoffrey Thomas <geofft@ldpreload.com>
Co-developed-by: Wedson Almeida Filho <wedsonaf@google.com>
Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com>
Co-developed-by: Sven Van Asbroeck <thesven73@gmail.com>
Signed-off-by: Sven Van Asbroeck <thesven73@gmail.com>
Co-developed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Gary Guo <gary@garyguo.net>
Co-developed-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Co-developed-by: Maciej Falkowski <m.falkowski@samsung.com>
Signed-off-by: Maciej Falkowski <m.falkowski@samsung.com>
Co-developed-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 08:56:43 +02:00
Miguel Ojeda
b8a94bfb33 kallsyms: increase maximum kernel symbol length to 512
Rust symbols can become quite long due to namespacing introduced
by modules, types, traits, generics, etc. For instance,
the following code:

    pub mod my_module {
        pub struct MyType;
        pub struct MyGenericType<T>(T);

        pub trait MyTrait {
            fn my_method() -> u32;
        }

        impl MyTrait for MyGenericType<MyType> {
            fn my_method() -> u32 {
                42
            }
        }
    }

generates a symbol of length 96 when using the upcoming v0 mangling scheme:

    _RNvXNtCshGpAVYOtgW1_7example9my_moduleINtB2_13MyGenericTypeNtB2_6MyTypeENtB2_7MyTrait9my_method

At the moment, Rust symbols may reach up to 300 in length.
Setting 512 as the maximum seems like a reasonable choice to
keep some headroom.

Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Petr Mladek <pmladek@suse.com>
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: Gary Guo <gary@garyguo.net>
Signed-off-by: Gary Guo <gary@garyguo.net>
Co-developed-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 08:56:25 +02:00
Miguel Ojeda
73bbb94466 kallsyms: support "big" kernel symbols
Rust symbols can become quite long due to namespacing introduced
by modules, types, traits, generics, etc.

Increasing to 255 is not enough in some cases, therefore
introduce longer lengths to the symbol table.

In order to avoid increasing all lengths to 2 bytes (since most
of them are small, including many Rust ones), use ULEB128 to
keep smaller symbols in 1 byte, with the rest in 2 bytes.

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: Gary Guo <gary@garyguo.net>
Signed-off-by: Gary Guo <gary@garyguo.net>
Co-developed-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Co-developed-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 08:56:08 +02:00
Miguel Ojeda
6e8c5bbd5e kallsyms: add static relationship between KSYM_NAME_LEN{,_BUFFER}
This adds a static assert to ensure `KSYM_NAME_LEN_BUFFER`
gets updated when `KSYM_NAME_LEN` changes.

The relationship used is one that keeps the new size (512+1)
close to the original buffer size (500).

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Co-developed-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 08:55:08 +02:00
Boqun Feng
b471927ebf kallsyms: avoid hardcoding buffer size
This introduces `KSYM_NAME_LEN_BUFFER` in place of the previously
hardcoded size of the input buffer.

It will also make it easier to update the size in a single place
in a later patch.

Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Co-developed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 08:54:39 +02:00
Boqun Feng
b66c874fdb kallsyms: use ARRAY_SIZE instead of hardcoded size
This removes one place where the `500` constant is hardcoded.

Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Geert Stappers <stappers@stappers.nl>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Co-developed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-09-28 08:54:17 +02:00
Linus Torvalds
f76349cf41 Linux 6.0-rc7 2022-09-25 14:01:02 -07:00
Linus Torvalds
5e049663f6 Ext4 regression and bug fixes:
- Performance regression fix from 5.18 on a Rasberry Pi
 
 - Fix extent parsing bug which triggers a BUG_ON when a (corrupted)
   extent tree has has a non-root node when zero entries.
 
 - Fix a livelock where in the right (wrong) circumstances a large
   number of nfsd threads can try to write to a nearly full file
   system, and retry for hours(!)
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Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "Regression and bug fixes:

   - Performance regression fix from 5.18 on a Rasberry Pi

   - Fix extent parsing bug which triggers a BUG_ON when a (corrupted)
     extent tree has has a non-root node when zero entries.

   - Fix a livelock where in the right (wrong) circumstances a large
     number of nfsd threads can try to write to a nearly full file
     system, and retry for hours(!)"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: limit the number of retries after discarding preallocations blocks
  ext4: fix bug in extents parsing when eh_entries == 0 and eh_depth > 0
  ext4: use buckets for cr 1 block scan instead of rbtree
  ext4: use locality group preallocation for small closed files
  ext4: make directory inode spreading reflect flexbg size
  ext4: avoid unnecessary spreading of allocations among groups
  ext4: make mballoc try target group first even with mb_optimize_scan
2022-09-25 09:03:31 -07:00
Linus Torvalds
4207d59567 dax-and-nvdimm-fixes-v6.0-final
- Fix a infinite loop bug in fsdax
 
 - Fix memory-type detection for devdax (EINJ regression)
 
 - Small cleanups
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Merge tag 'dax-and-nvdimm-fixes-v6.0-final' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull NVDIMM and DAX fixes from Dan Williams:
 "A recently discovered one-line fix for devdax that further addresses a
  v5.5 regression, and (a bit embarrassing) a small batch of fixes that
  have been sitting in my fixes tree for weeks.

  The older fixes have soaked in linux-next during that time and address
  an fsdax infinite loop and some other minor fixups.

   - Fix a infinite loop bug in fsdax

   - Fix memory-type detection for devdax (EINJ regression)

   - Small cleanups"

* tag 'dax-and-nvdimm-fixes-v6.0-final' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  devdax: Fix soft-reservation memory description
  fsdax: Fix infinite loop in dax_iomap_rw()
  nvdimm/namespace: drop nested variable in create_namespace_pmem()
  ndtest: Cleanup all of blk namespace specific code
  pmem: fix a name collision
2022-09-25 08:53:52 -07:00
Linus Torvalds
f0cc7c0008 I2C driver bugfixes for mlxbf and imx, a few documentation fixes after
the rework this cycle, and one hardening for the i2c-mux core
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Merge tag 'i2c-for-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "I2C driver bugfixes for mlxbf and imx, a few documentation fixes after
  the rework this cycle, and one hardening for the i2c-mux core"

* tag 'i2c-for-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: mux: harden i2c_mux_alloc() against integer overflows
  i2c: mlxbf: Fix frequency calculation
  i2c: mlxbf: prevent stack overflow in mlxbf_i2c_smbus_start_transaction()
  i2c: mlxbf: incorrect base address passed during io write
  Documentation: i2c: fix references to other documents
  MAINTAINERS: remove Nehal Shah from AMD MP2 I2C DRIVER
  i2c: imx: If pm_runtime_get_sync() returned 1 device access is possible
2022-09-25 08:44:46 -07:00
Dan Williams
b3bbcc5d1d Merge branch 'for-6.0/dax' into libnvdimm-fixes
Pick up another "Soft Reservation" fix for v6.0-final on top of some
straggling nvdimm fixes that missed v5.19.
2022-09-24 18:14:12 -07:00
Dan Williams
67feaba413 devdax: Fix soft-reservation memory description
The "hmem" platform-devices that are created to represent the
platform-advertised "Soft Reserved" memory ranges end up inserting a
resource that causes the iomem_resource tree to look like this:

340000000-43fffffff : hmem.0
  340000000-43fffffff : Soft Reserved
    340000000-43fffffff : dax0.0

This is because insert_resource() reparents ranges when they completely
intersect an existing range.

This matters because code that uses region_intersects() to scan for a
given IORES_DESC will only check that top-level 'hmem.0' resource and
not the 'Soft Reserved' descendant.

So, to support EINJ (via einj_error_inject()) to inject errors into
memory hosted by a dax-device, be sure to describe the memory as
IORES_DESC_SOFT_RESERVED. This is a follow-on to:

commit b13a3e5fd4 ("ACPI: APEI: Fix _EINJ vs EFI_MEMORY_SP")

...that fixed EINJ support for "Soft Reserved" ranges in the first
instance.

Fixes: 262b45ae3a ("x86/efi: EFI soft reservation to E820 enumeration")
Reported-by: Ricardo Sandoval Torres <ricardo.sandoval.torres@intel.com>
Tested-by: Ricardo Sandoval Torres <ricardo.sandoval.torres@intel.com>
Cc: <stable@vger.kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Omar Avelar <omar.avelar@intel.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Mark Gross <markgross@kernel.org>
Link: https://lore.kernel.org/r/166397075670.389916.7435722208896316387.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2022-09-24 18:05:53 -07:00
Linus Torvalds
105a36f369 Kbuild fixes for v6.0 (3rd)
- Fix build error for the combination of CONFIG_SYSTEM_TRUSTED_KEYRING=y
    and CONFIG_X509_CERTIFICATE_PARSER=m
 
  - Fix CONFIG_DEBUG_INFO_SPLIT to generate debug info for GCC 11+ and Clang 12+
 
  - Revive debug info for assembly files
 
  - Remove unused code
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Merge tag 'kbuild-fixes-v6.0-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Fix build error for the combination of SYSTEM_TRUSTED_KEYRING=y and
   X509_CERTIFICATE_PARSER=m

 - Fix DEBUG_INFO_SPLIT to generate debug info for GCC 11+ and Clang 12+

 - Revive debug info for assembly files

 - Remove unused code

* tag 'kbuild-fixes-v6.0-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  Makefile.debug: re-enable debug info for .S files
  Makefile.debug: set -g unconditional on CONFIG_DEBUG_INFO_SPLIT
  certs: make system keyring depend on built-in x509 parser
  Kconfig: remove unused function 'menu_get_root_menu'
  scripts/clang-tools: remove unused module
2022-09-24 17:41:17 -07:00
Linus Torvalds
23b99237f8 s390 updates for v6.0-rc7
- Fix potential hangs in VFIO AP driver.
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Merge tag 's390-6.0-5' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fix from Vasily Gorbik:

 - Fix potential hangs in VFIO AP driver

* tag 's390-6.0-5' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/vfio-ap: bypass unnecessary processing of AP resources
2022-09-24 17:35:42 -07:00
Linus Torvalds
42f9508b3b Power management fixes for 6.0-rc7
- Fix uninitialized variable usage in dev_pm_opp_config_clks_simple()
    (Christophe JAILLET).
 
  - Add missing OPP DT properties (Rob Herring).
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Merge tag 'pm-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix an uninitialized variable usage in the operating performance
  points code and add missing DT bindings for it.

  Specifics:

   - Fix uninitialized variable usage in dev_pm_opp_config_clks_simple()
     (Christophe JAILLET)

   - Add missing OPP DT properties (Rob Herring)"

* tag 'pm-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  dt-bindings: opp: Add missing (unevaluated|additional)Properties on child nodes
  OPP: Fix an un-initialized variable usage
2022-09-24 08:53:57 -07:00
Linus Torvalds
1a61b82856 Char/Misc driver fixes for 6.0-rc7
Here are 3 tiny driver fixes for 6.0-rc7.  They include:
 	- phy driver reset bugfix
 	- fpga memleak bugfix
 	- counter irq config bugfix
 
 The first 2 have been in linux-next for a while, the last one has only
 been added to my tree in the past few days, but was in linux-next under
 a different commit id.  I couldn't pull directly from the counter tree
 due to some gpg key propagation issue, so I took the commit directly
 from email instead.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are three tiny driver fixes for 6.0-rc7.  They include:

   - phy driver reset bugfix

   - fpga memleak bugfix

   - counter irq config bugfix

  The first two have been in linux-next for a while, the last one has
  only been added to my tree in the past few days, but was in linux-next
  under a different commit id. I couldn't pull directly from the counter
  tree due to some gpg key propagation issue, so I took the commit
  directly from email instead"

* tag 'char-misc-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  counter: 104-quad-8: Fix skipped IRQ lines during events configuration
  fpga: m10bmc-sec: Fix possible memory leak of flash_buf
  phy: marvell: phy-mvebu-a3700-comphy: Remove broken reset support
2022-09-24 08:46:07 -07:00
Linus Torvalds
7e2cd21e02 TTY/Serial driver fixes for 6.0-rc7
Here are some small, and late, serial driver fixes for 6.0-rc7 to
 resolve some reported problems.
 
 Included in here are:
 	- tegra icount accounting fixes, including a framework function
 	  that other drivers will be converted over to using in 6.1-rc1.
 	- fsl_lpuart reset bugfix
 	- 8250 omap 485 bugfix
 	- sifive serial clock bugfix
 
 The last 3 patches have not shown up in linux-next due to them being
 added to my tree only 2 days ago, but they are tiny and self-contained
 and the developers say they resolve issues that they have with 6.0-rc.
 The other 3 have been in linux-next for a while with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver fixes from Greg KH:
 "Here are some small, and late, serial driver fixes for 6.0-rc7 to
  resolve some reported problems.

  Included in here are:

   - tegra icount accounting fixes, including a framework function that
     other drivers will be converted over to using in 6.1-rc1.

   - fsl_lpuart reset bugfix

   - 8250 omap 485 bugfix

   - sifive serial clock bugfix

  The last three patches have not shown up in linux-next due to them
  being added to my tree only 2 days ago, but they are tiny and
  self-contained and the developers say they resolve issues that they
  have with 6.0-rc. The other three have been in linux-next for a while
  with no reported issues"

* tag 'tty-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: sifive: enable clocks for UART when probed
  serial: 8250: omap: Use serial8250_em485_supported
  serial: fsl_lpuart: Reset prior to registration
  serial: tegra-tcu: Use uart_xmit_advance(), fixes icount.tx accounting
  serial: tegra: Use uart_xmit_advance(), fixes icount.tx accounting
  serial: Create uart_xmit_advance()
2022-09-24 08:42:55 -07:00
Linus Torvalds
1772094f12 Cgroup fixes for v6.0-rc6
* Add Waiman Long as a cpuset maintainer.
 
 * cgroup_get_from_id() could be fed a kernfs ID which doesn't point to a
   cgroup directory but a knob file and then crash. Error out if the lookup
   kernfs_node isn't a directory.
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Merge tag 'cgroup-for-6.0-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:

 - Add Waiman Long as a cpuset maintainer

 - cgroup_get_from_id() could be fed a kernfs ID which doesn't point to
   a cgroup directory but a knob file and then crash. Error out if the
   lookup kernfs_node isn't a directory.

* tag 'cgroup-for-6.0-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: cgroup_get_from_id() must check the looked-up kn is a directory
  cpuset: Add Waiman Long as a cpuset maintainer
2022-09-24 08:36:10 -07:00
Linus Torvalds
aae8dda519 Workqueue fixes for v6.0-rc6
Just one patch to improve flush lockdep coverage.
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Merge tag 'wq-for-6.0-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

Pull workqueue fix from Tejun Heo:
 "Just one patch to improve flush lockdep coverage"

* tag 'wq-for-6.0-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: don't skip lockdep work dependency in cancel_work_sync()
2022-09-24 08:32:59 -07:00
Linus Torvalds
3db61221f4 io_uring-6.0-2022-09-23
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Merge tag 'io_uring-6.0-2022-09-23' of git://git.kernel.dk/linux

Pull io_uring fix from Jens Axboe:
 "Just a single fix for an issue with un-reaped IOPOLL requests on ring
  exit"

* tag 'io_uring-6.0-2022-09-23' of git://git.kernel.dk/linux:
  io_uring: ensure that cached task references are always put on exit
2022-09-24 08:27:08 -07:00
Linus Torvalds
0be27f7be2 block-6.0-2022-09-22
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Merge tag 'block-6.0-2022-09-22' of git://git.kernel.dk/linux

Pull block fixes from Jens Axboe:
 "Fix a regression that's been plaguing us by reverting the offending
  commit, as attempts to both reproduce the issue and fix it in a saner
  fashion have failed.

  Fix for a potential oops condition in the s390 dasd block driver"

* tag 'block-6.0-2022-09-22' of git://git.kernel.dk/linux:
  Revert "block: freeze the queue earlier in del_gendisk"
  s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup
2022-09-24 08:22:53 -07:00
Nick Desaulniers
32ef9e5054 Makefile.debug: re-enable debug info for .S files
Alexey reported that the fraction of unknown filename instances in
kallsyms grew from ~0.3% to ~10% recently; Bill and Greg tracked it down
to assembler defined symbols, which regressed as a result of:

commit b8a9092330 ("Kbuild: do not emit debug info for assembly with LLVM_IAS=1")

In that commit, I allude to restoring debug info for assembler defined
symbols in a follow up patch, but it seems I forgot to do so in

commit a66049e2cf ("Kbuild: make DWARF version a choice")

Link: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=31bf18645d98b4d3d7357353be840e320649a67d
Fixes: b8a9092330 ("Kbuild: do not emit debug info for assembly with LLVM_IAS=1")
Reported-by: Alexey Alexandrov <aalexand@google.com>
Reported-by: Bill Wendling <morbo@google.com>
Reported-by: Greg Thelen <gthelen@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Suggested-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-24 11:19:19 +09:00
Nick Desaulniers
61f2b7c749 Makefile.debug: set -g unconditional on CONFIG_DEBUG_INFO_SPLIT
Dmitrii, Fangrui, and Mashahiro note:

  Before GCC 11 and Clang 12 -gsplit-dwarf implicitly uses -g2.

Fix CONFIG_DEBUG_INFO_SPLIT for gcc-11+ & clang-12+ which now need -g
specified in order for -gsplit-dwarf to work at all.

-gsplit-dwarf has been mutually exclusive with -g since support for
CONFIG_DEBUG_INFO_SPLIT was introduced in
commit 866ced950b ("kbuild: Support split debug info v4")
I don't think it ever needed to be.

Link: https://lore.kernel.org/lkml/20220815013317.26121-1-dmitrii.bundin.a@gmail.com/
Link: https://lore.kernel.org/lkml/CAK7LNARPAmsJD5XKAw7m_X2g7Fi-CAAsWDQiP7+ANBjkg7R7ng@mail.gmail.com/
Link: https://reviews.llvm.org/D80391
Cc: Andi Kleen <ak@linux.intel.com>
Reported-by: Dmitrii Bundin <dmitrii.bundin.a@gmail.com>
Reported-by: Fangrui Song <maskray@google.com>
Reported-by: Masahiro Yamada <masahiroy@kernel.org>
Suggested-by: Dmitrii Bundin <dmitrii.bundin.a@gmail.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-24 11:12:54 +09:00
Jens Axboe
e775f93f2a io_uring: ensure that cached task references are always put on exit
io_uring caches task references to avoid doing atomics for each of them
per request. If a request is put from the same task that allocated it,
then we can maintain a per-ctx cache of them. This obviously relies
on io_uring always pruning caches in a reliable way, and there's
currently a case off io_uring fd release where we can miss that.

One example is a ring setup with IOPOLL, which relies on the task
polling for completions, which will free them. However, if such a task
submits a request and then exits or closes the ring without reaping
the completion, then ring release will reap and put. If release happens
from that very same task, the completed request task refs will get
put back into the cache pool. This is problematic, as we're now beyond
the point of pruning caches.

Manually drop these caches after doing an IOPOLL reap. This releases
references from the current task, which is enough. If another task
happens to be doing the release, then the caching will not be
triggered and there's no issue.

Cc: stable@vger.kernel.org
Fixes: e98e49b2bb ("io_uring: extend task put optimisations")
Reported-by: Homin Rhee <hominlab@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2022-09-23 18:51:08 -06:00
Linus Torvalds
a63f2e7cb1 arm64 fixes for -rc7
- Fix false positive "sleeping while atomic" warning resulting from
   the kPTI rework taking a mutex too early.
 
 - Fix possible overflow in AMU frequency calculation
 
 - Fix incorrect shift in CMN PMU driver which causes problems with
   newer versions of the IP
 
 - Reduce alignment of the CFI jump table to avoid huge kernel images
   and link errors with !4KiB page size configurations
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "These are all very simple and self-contained, although the CFI
  jump-table fix touches the generic linker script as that's where the
  problematic macro lives.

   - Fix false positive "sleeping while atomic" warning resulting from
     the kPTI rework taking a mutex too early.

   - Fix possible overflow in AMU frequency calculation

   - Fix incorrect shift in CMN PMU driver which causes problems with
     newer versions of the IP

   - Reduce alignment of the CFI jump table to avoid huge kernel images
     and link errors with !4KiB page size configurations"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  vmlinux.lds.h: CFI: Reduce alignment of jump-table to function alignment
  perf/arm-cmn: Add more bits to child node address offset field
  arm64: topology: fix possible overflow in amu_fie_setup()
  arm64: mm: don't acquire mutex when rewriting swapper
2022-09-23 15:28:51 -07:00
Masahiro Yamada
2154aca214 certs: make system keyring depend on built-in x509 parser
Commit e90886291c ("certs: make system keyring depend on x509 parser")
is not the right fix because x509_load_certificate_list() can be modular.

The combination of CONFIG_SYSTEM_TRUSTED_KEYRING=y and
CONFIG_X509_CERTIFICATE_PARSER=m still results in the following error:

    LD      .tmp_vmlinux.kallsyms1
  ld: certs/system_keyring.o: in function `load_system_certificate_list':
  system_keyring.c:(.init.text+0x8c): undefined reference to `x509_load_certificate_list'
  make: *** [Makefile:1169: vmlinux] Error 1

Fixes: e90886291c ("certs: make system keyring depend on x509 parser")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Adam Borowski <kilobyte@angband.pl>
2022-09-24 04:31:18 +09:00
Zeng Heng
03764b30a4 Kconfig: remove unused function 'menu_get_root_menu'
There is nowhere calling `menu_get_root_menu` function,
so remove it.

Signed-off-by: Zeng Heng <zengheng4@huawei.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-24 04:30:30 +09:00
yangxingwu
237fe72749 scripts/clang-tools: remove unused module
Remove unused imported 'os' module.

Signed-off-by: yangxingwu <xingwu.yang@gmail.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2022-09-24 04:30:06 +09:00
Ming Lei
df02452f3d cgroup: cgroup_get_from_id() must check the looked-up kn is a directory
cgroup has to be one kernfs dir, otherwise kernel panic is caused,
especially cgroup id is provide from userspace.

Reported-by: Marco Patalano <mpatalan@redhat.com>
Fixes: 6b658c4863 ("scsi: cgroup: Add cgroup_get_from_id()")
Cc: Muneendra <muneendra.kumar@broadcom.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Acked-by: Mukesh Ojha <quic_mojha@quicinc.com>
Cc: stable@vger.kernel.org # v5.14+
Signed-off-by: Tejun Heo <tj@kernel.org>
2022-09-23 07:18:45 -10:00
Linus Torvalds
1707c39ae3 Driver core fixes for 6.0-rc7
Here are two tiny driver core fixes for 6.0-rc7 that resolve some
 oft-reported problems.
 
 The first is a revert of the "fw_devlink.strict=1" default option that
 we keep trying to enable, but we keep finding platforms that this just
 breaks everything on.  So again, we need it reverted and hopefully it
 can be worked on in future releases.
 
 The second is a sysfs file-size bugfix that resolves an issue that many
 people are starting to hit as the fix it is fixing also was backported
 to stable kernels.  The util-linux developers are starting to get
 bugreports about sysfs files that contain no data because of this
 problem, and this fix which has been in linux-next in the bitfield tree
 for a long time, resolves it.  I'm submitting it here as it needs to be
 merged for 6.0-final, not for 6.1-rc1.
 
 Both of these have been in linux-next with no reported issues, only
 reports were that these fixed problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core fixes from Greg KH:
 "Here are two tiny driver core fixes for 6.0-rc7 that resolve some
  oft-reported problems.

  The first is a revert of the "fw_devlink.strict=1" default option that
  we keep trying to enable, but we keep finding platforms that this just
  breaks everything on. So again, we need it reverted and hopefully it
  can be worked on in future releases.

  The second is a sysfs file-size bugfix that resolves an issue that
  many people are starting to hit as the fix it is fixing also was
  backported to stable kernels. The util-linux developers are starting
  to get bugreports about sysfs files that contain no data because of
  this problem, and this fix which has been in linux-next in the
  bitfield tree for a long time, resolves it. I'm submitting it here as
  it needs to be merged for 6.0-final, not for 6.1-rc1.

  Both of these have been in linux-next with no reported issues, only
  reports were that these fixed problems"

* tag 'driver-core-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  drivers/base: Fix unsigned comparison to -1 in CPUMAP_FILE_MAX_BYTES
  Revert "driver core: Set fw_devlink.strict=1 by default"
2022-09-23 09:12:18 -07:00
Linus Torvalds
33a4e37ebc USB / Thunderbolt driver fixes and ids for 6.0-rc7
Here are a few small USB and Thunderbolt driver fixes and new device ids
 for 6.0-rc7.
 
 They contain:
 	- new usb-serial driver ids
 	- documentation build warning fix in USB hub code
 	- flexcop-usb long-posted bugfix (the v4l maintainer for this is
 	  MIA so I have finally picked this up as it is a fix for a
 	  reported problem.)
 	- dwc3 64bit DMA bugfix
 	- new thunderbolt device ids
 	- typec build error fix
 
 All of these have been in linux-next with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB / Thunderbolt driver fixes and ids from Greg KH:
 "Here are a few small USB and Thunderbolt driver fixes and new device
  ids for 6.0-rc7.

  They contain:

   - new usb-serial driver ids

   - documentation build warning fix in USB hub code

   - flexcop-usb long-posted bugfix (the v4l maintainer for this is MIA
     so I have finally picked this up as it is a fix for a reported
     problem.)

   - dwc3 64bit DMA bugfix

   - new thunderbolt device ids

   - typec build error fix

  All of these have been in linux-next with no reported issues"

* tag 'usb-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: typec: anx7411: Fix build error without CONFIG_POWER_SUPPLY
  media: flexcop-usb: fix endpoint type check
  USB: serial: option: add Quectel RM520N
  USB: serial: option: add Quectel BG95 0x0203 composition
  thunderbolt: Add support for Intel Maple Ridge single port controller
  usb: dwc3: core: leave default DMA if the controller does not support 64-bit DMA
  USB: core: Fix RST error in hub.c
2022-09-23 09:07:08 -07:00
Linus Torvalds
9395cd7cef Landlock fix for v6.0-rc7
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Merge tag 'landlock-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux

Pull landlock fix from Mickaël Salaün:
 "Fix out-of-tree builds for Landlock tests"

* tag 'landlock-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux:
  selftests/landlock: Fix out-of-tree builds
2022-09-23 08:59:16 -07:00
Linus Torvalds
a7b7751aeb RISC-V Fixes for 6.0-rc7
* A handful of build fixes for the T-Head errata, including some
   functional issues the compilers found.
 * A fix for a nasty sigreturn bug.
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Merge tag 'riscv-for-linus-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V fixes from Palmer Dabbelt:

 - A handful of build fixes for the T-Head errata, including some
   functional issues the compilers found

 - A fix for a nasty sigreturn bug

* tag 'riscv-for-linus-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  RISC-V: Avoid coupling the T-Head CMOs and Zicbom
  riscv: fix a nasty sigreturn bug...
  riscv: make t-head erratas depend on MMU
  riscv: fix RISCV_ISA_SVPBMT kconfig dependency warning
  RISC-V: Clean up the Zicbom block size probing
2022-09-23 08:51:05 -07:00
Linus Torvalds
317fab7ec5 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()
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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
2022-09-23 08:42:30 -07:00
Linus Torvalds
526e826285 xen: branch for v6.0-rc7
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Merge tag 'for-linus-6.0-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fix from Juergen Gross:
 "A single fix for an issue in the xenbus driver (initialization of
  multi-page rings for Xen PV devices)"

* tag 'for-linus-6.0-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/xenbus: fix xenbus_setup_ring()
2022-09-23 08:31:24 -07:00