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deprecated.rst: Include details on "no_hash_pointers" 

Linus decided a debug toggle for %p was tolerable, so update the
%p deprecation documentation.

Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20210723200526.3424128-1-keescook@chromium.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Kees Cook 2021-07-23 13:05:26 -07:00 committed by Jonathan Corbet
parent 0a03801ca8
commit 6ab0493dfc
1 changed files with 3 additions and 1 deletions
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Documentation/process/deprecated.rst
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@ -164,7 +164,9 @@ Paraphrasing Linus's current `guidance <https://lore.kernel.org/lkml/CA+55aFwQEd
up to Linus's scrutiny, maybe you can use "%px", along with making sure
you have sensible permissions.
And finally, know that a toggle for "%p" hashing will `not be accepted <https://lore.kernel.org/lkml/CA+55aFwieC1-nAs+NFq9RTwaR8ef9hWa4MjNBWL41F-8wM49eA@mail.gmail.com/>`_.
If you are debugging something where "%p" hashing is causing problems,
you can temporarily boot with the debug flag "`no_hash_pointers
<https://git.kernel.org/linus/5ead723a20e0447bc7db33dc3070b420e5f80aa6>`_".
Variable Length Arrays (VLAs)
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