1756ddea69
The worst case compression size used by pstore gives an upper bound for how much the data might inadvertently *grow* due to encapsulation overhead if the input is not compressible at all. Given that pstore records have individual 'compressed' flags, we can simply store the uncompressed data if compressing it would end up using more space, making the worst case identical to the uncompressed case. This means we can just drop all the elaborate logic that reasons about upper bounds for each individual compression algorithm, and just store the uncompressed data directly if compression fails for any reason. Co-developed-by: Kees Cook <keescook@chromium.org> Tested-by: "Guilherme G. Piccoli" <gpiccoli@igalia.com> # Steam Deck Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Eric Biggers <ebiggers@google.com> Link: https://lore.kernel.org/r/20230712162332.2670437-2-ardb@kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> |
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| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.