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The new generic LSM hook security_file_post_open() was recently added
to the LSM framework in commit 8f46ff5767 ("security: Introduce
file_post_open hook"). Let's proactively add this generic LSM hook to
the sleepable_lsm_hooks BTF ID set, because I can't see there being
any strong reasons not to, and it's only a matter of time before
someone else comes around and asks for it to be there.
security_file_post_open() is inherently sleepable as it's purposely
situated in the kernel that allows LSMs to directly read out the
contents of the backing file if need be. Additionally, it's called
directly after security_file_open(), and that LSM hook in itself
already exists in the sleepable_lsm_hooks BTF ID set.
Signed-off-by: Matt Bobrowski <mattbobrowski@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20240618192923.379852-1-mattbobrowski@google.com
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.