linux-kernel - [PATCH 0/1] cred: copy_process() should clear child->replacement_session

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Message-ID: <20120409190323.GA14712@redhat.com>
Date:	Mon, 9 Apr 2012 21:03:23 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	David Howells <dhowells@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: [PATCH 0/1] cred: copy_process() should clear
	child->replacement_session_keyring

Hello.

Looks trivial, but I do not know how to test and I don't understand
this code. David, please review ;)

Note: initially this was 1/2. The usage of >replacement_session_keyring
is racy, although the problem is minor. I think that instead of fixing
a lot of key_replace_session_keyring's callers in arch/ we can add the
simple abstraction layer and kill ->replacement_session_keyring. I'll
try to send the patches tomorrow.

Btw. exit_creds() does validate_creds(cred) right before put_cred(cred),
without alter_cred_subscribers() in between this looks unneeded?

Oleg.

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