linux-kernel - Re: [PATCH 1/2] KEYS: Replace uid/gid/perm permissions checking with an ACL

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Date:   Tue, 9 Jul 2019 18:35:53 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     David Howells <dhowells@...hat.com>, keyrings@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] KEYS: Replace uid/gid/perm permissions checking with
 an ACL

On Tue, Jul 09, 2019 at 06:16:01PM -0700, Eric Biggers wrote:
> On Thu, May 23, 2019 at 04:58:27PM +0100, David Howells wrote:
> > Replace the uid/gid/perm permissions checking on a key with an ACL to allow
> > the SETATTR and SEARCH permissions to be split.  This will also allow a
> > greater range of subjects to represented.
> > 
> 
> This patch broke 'keyctl new_session', and hence broke all the fscrypt tests:
> 
> $ keyctl new_session
> keyctl_session_to_parent: Permission denied
> 
> Output of 'keyctl show' is
> 
> $ keyctl show
> Session Keyring
>  605894913 --alswrv      0     0  keyring: _ses
>  189223103 ----s-rv      0     0   \_ user: invocation_id
> 
> - Eric

... and this also broke loading in-kernel X.509 certificates.  See the other
thread: https://lore.kernel.org/lkml/27671.1562384658@turing-police/T/#u

- Eric