linux-kernel - Re: [PATCH 13/38] tomoyo: Implement security hooks for the new mount API [ver #10]

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Message-ID: <b4be11f6-8235-1ee1-9a01-c09eb9b88404@I-love.SAKURA.ne.jp>
Date:   Sat, 28 Jul 2018 11:29:57 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:     David Howells <dhowells@...hat.com>
Cc:     viro@...iv.linux.org.uk, tomoyo-dev-en@...ts.sourceforge.jp,
        linux-security-module@...r.kernel.org,
        torvalds@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 13/38] tomoyo: Implement security hooks for the new mount
 API [ver #10]

On 2018/07/28 2:32, David Howells wrote:
> Implement the security hook to check the creation of a new mountpoint for
> Tomoyo.
> 
> As far as I can tell, Tomoyo doesn't make use of the mount data or parse
> any mount options, so I haven't implemented any of the fs_context hooks for
> it.
> 
> Signed-off-by: David Howells <dhowells@...hat.com>
> cc: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
> cc: tomoyo-dev-en@...ts.sourceforge.jp
> cc: linux-security-module@...r.kernel.org

Would you provide examples of each possible combination as a C program?
For example, if one mount point from multiple sources with different
options are possible, please describe such pattern using syscall so that
LSM modules can run it to see whether they are working as expected.