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17bbbefbf6
This patch adds a more convenient method for reading C strings from userspace. Logic is added to NUL-terminate the buffer when necessary so that a &CStr can be returned. Note that we treat attempts to read past `self.length` as a fault, so this returns EFAULT if that limit is exceeded before `buf.len()` is reached. Reviewed-by: Danilo Krummrich <dakr@kernel.org> Signed-off-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Benno Lossin <lossin@kernel.org> Link: https://lore.kernel.org/r/20250616-strncpy-from-user-v5-2-2d3fb0e1f5af@google.com [ Use `from_mut` to clean `clippy::ref_as_ptr` lint. Reworded title. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.