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de4b59d652
KASAN instrumentation of lockdep has been disabled, as we don't need KASAN to check the validity of lockdep internal data structures and incur unnecessary performance overhead. However, the lockdep_map pointer passed in externally may not be valid (e.g. use-after-free) and we run the risk of using garbage data resulting in false lockdep reports. Add kasan_check_byte() call in lock_acquire() for non kernel core data object to catch invalid lockdep_map and print out a KASAN report before any lockdep splat, if any. Suggested-by: Marco Elver <elver@google.com> Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Marco Elver <elver@google.com> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com> Link: https://lore.kernel.org/r/20250214195242.2480920-1-longman@redhat.com Link: https://lore.kernel.org/r/20250307232717.1759087-7-boqun.feng@gmail.com |
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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.