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Kees Cook 2623c4fbe2 LSM: Revive CONFIG_DEFAULT_SECURITY_* for "make oldconfig" Commit `70b62c2566` ("LoadPin: Initialize as ordered LSM") removed CONFIG_DEFAULT_SECURITY_{SELINUX,SMACK,TOMOYO,APPARMOR,DAC} from security/Kconfig and changed CONFIG_LSM to provide a fixed ordering as a default value. That commit expected that existing users (upgrading from Linux 5.0 and earlier) will edit CONFIG_LSM value in accordance with their CONFIG_DEFAULT_SECURITY_* choice in their old kernel configs. But since users might forget to edit CONFIG_LSM value, this patch revives the choice (only for providing the default value for CONFIG_LSM) in order to make sure that CONFIG_LSM reflects CONFIG_DEFAULT_SECURITY_* from their old kernel configs. Note that since TOMOYO can be fully stacked against the other legacy major LSMs, when it is selected, it explicitly disables the other LSMs to avoid them also initializing since TOMOYO does not expect this currently. Reported-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reported-by: Randy Dunlap <rdunlap@infradead.org> Fixes: `70b62c2566` ("LoadPin: Initialize as ordered LSM") Co-developed-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: James Morris <james.morris@microsoft.com>		2019-03-29 14:08:49 -07:00
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security	LSM: Revive CONFIG_DEFAULT_SECURITY_* for "make oldconfig"	2019-03-29 14:08:49 -07:00
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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.