Re: [PATCH 2/2] AppArmor: Fix masking of capabilities in complain mode

Greg KH
2011-06-29T04:27:56Z

On Wed, Jun 29, 2011 at 02:44:34AM +0100, John Johansen wrote:
> AppArmor is masking the capabilities returned by capget against the
> capabilities mask in the profile. This is wrong, in complain mode the
> profile has effectively all capabilities, as the profile restrictions are
> not being enforced, merely tested against to determine if an access is
> known by the profile.
>
> This can result in the wrong behavior of security conscience applications
> like sshd which examine their capability set, and change their behavior
> accordingly. In this case because of the masked capability set being
> returned sshd fails due to DAC checks, even when the profile is in complain
> mode.
>
> Kernels affected: 2.6.36 - 3.0.
>
> Signed-off-by: John Johansen <john.johansen@canonical.com>
> ---

You say that multiple kernels are affected, then why not also include
stable@kernel.org here as well?

confused,

greg k-h