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2b1fd82cba
Emil Tsalapatis says: ==================== bpf/arena: Add kfunc for reserving arena memory Add a new kfunc for BPF arenas that reserves a region of the mapping to prevent it from being mapped. These regions serve as guards against out-of-bounds accesses and are useful for debugging arena-related code. >From v3 (20250709015712.97099-1-emil@etsalapatis.com) ------------------------------------------------------ - Added Acked-by tags by Yonghong. - Replace hardcoded error numbers in selftests (Yonghong). - Fixed selftest for partially freeing a reserved region (Yonghong). >From v2 (20250702003351.197234-1-emil@etsalapatis.com) ------------------------------------------------------ - Removed -EALREADY and replaced with -EINVAL to bring error handling in line with the rest of the BPF code (Alexei). >From v1 (20250620031118.245601-1-emil@etsalapatis.com) ------------------------------------------------------ - Removed the additional guard range tree. Adjusted tests accordingly. Reserved regions now behave like allocated regions, and can be unreserved using bpf_arena_free_pages(). They can also be allocated from userspace through minor faults. It is up to the user to prevent erroneous frees and/or use the BPF_F_SEGV_ON_FAULT flag to catch stray userspace accesses (Alexei). - Changed terminology from guard pages to reserved pages (Alexei, Kartikeya). Signed-off-by: Emil Tsalapatis <emil@etsalapatis.com> ==================== Link: https://patch.msgid.link/20250709191312.29840-1-emil@etsalapatis.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
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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.