linux-kernel - Re: [PATCH] kernel/sysctl-test: Unregister sysctl table after test completion

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Message-ID: <ce50a353-e501-4a22-9742-188edfa2a7b2@roeck-us.net>
Date: Thu, 22 May 2025 11:53:15 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Kees Cook <kees@...nel.org>
Cc: Joel Granados <joel.granados@...nel.org>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, Wen Yang <wen.yang@...ux.dev>
Subject: Re: [PATCH] kernel/sysctl-test: Unregister sysctl table after test
 completion

On Wed, May 21, 2025 at 06:32:11PM -0700, Guenter Roeck wrote:
> One of the sysctl tests registers a valid sysctl table. This operation
> is expected to succeed. However, it does not unregister the table after
> executing the test. If the code is built as module and the module is
> unloaded after the test, the next operation trying to access the table
> (such as 'sysctl -a') will trigger a crash.
> 
> Unregister the registered table after test completiion to solve the
> problem.
> 

Never mind, I just learned that a very similar patch has been submitted
last December or so but was rejected, and that the acceptable (?) fix seems
to be stalled.

Sorry for the noise.

Guenter