Re: [PATCH 0/3][v3] add support for never printing hashed addresses

From: Andy Shevchenko
Date: Thu Feb 11 2021 - 05:58:35 EST


On Wed, Feb 10, 2021 at 03:34:50PM -0600, Timur Tabi wrote:
> [The list of email addresses on CC: is getting quite lengthy,
> so I hope I've included everyone.]
>
> Although hashing addresses printed via printk does make the
> kernel more secure, it interferes with debugging, especially
> with some functions like print_hex_dump() which always uses
> hashed addresses.
>
> To avoid having to choose between %p and %px, it's easier to
> add a kernel command line that treats all %p as %px. This
> encourages developers to use %p more without making debugging
> more difficult.
>
> Patches #1 and #2 upgrade the kselftest framework so that
> it can report on tests that were skipped outright. This
> is needed for the test_printf module which will now skip
> %p hashing tests if hashing is disabled.
>
> Patch #2 upgrades the printf library to check the command
> line. It also updates test_printf().

Side note to the future contributions.

> Full series:
>
> Acked-by: Marco Elver <elver@xxxxxxxxxx>

That's what you usually add to each patch in the series individually.
You may use simple oneliner for this, i.e. `git filter-branch --msg-filter ...`

--
With Best Regards,
Andy Shevchenko