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Linux kernel source tree
401af75c49
Kumar Kartikeya Dwivedi says: ==================== This set fixes a bug related to bad var_off being permitted for kfunc call in case of PTR_TO_BTF_ID, consolidates offset checks for all register types allowed as helper or kfunc arguments into a common shared helper, and introduces a couple of other checks to harden the kfunc release logic and prevent future bugs. Some selftests are also included that fail in absence of these fixes, serving as demonstration of the issues being fixed. Changelog: ---------- v3 -> v4: v3: https://lore.kernel.org/bpf/20220304000508.2904128-1-memxor@gmail.com * Update commit message for __diag patch to say clang instead of LLVM (Nathan) * Address nits for check_func_arg_reg_off (Martin) * Add comment for fixed_off_ok case, remove is_kfunc check (Martin) v2 -> v3: v2: https://lore.kernel.org/bpf/20220303045029.2645297-1-memxor@gmail.com * Add my SoB to __diag for clang patch (Nathan) v1 -> v2: v1: https://lore.kernel.org/bpf/20220301065745.1634848-1-memxor@gmail.com * Put reg->off check for release kfunc inside check_func_arg_reg_off, make the check a bit more readable * Squash verifier selftests errstr update into patch 3 for bisect (Alexei) * Include fix from Nathan for clang warning about missing prototypes * Add unified __diag_ingore_all that works for both GCC/LLVM (Alexei) Older discussion: Link: https://lore.kernel.org/bpf/20220219113744.1852259-1-memxor@gmail.com Kumar Kartikeya Dwivedi (7): bpf: Add check_func_arg_reg_off function bpf: Fix PTR_TO_BTF_ID var_off check bpf: Disallow negative offset in check_ptr_off_reg bpf: Harden register offset checks for release helpers and kfuncs compiler_types.h: Add unified __diag_ignore_all for GCC/LLVM bpf: Replace __diag_ignore with unified __diag_ignore_all selftests/bpf: Add tests for kfunc register offset checks ==================== Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
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| fs | ||
| include | ||
| init | ||
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| kernel | ||
| lib | ||
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| net | ||
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| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
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| README | ||
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 Restructured Text 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.