[PATCH] apparmor: fix qemu_bridge_helper for named profile

[Michal Privoznik]

On 1/30/20 8:21 AM, Christian Ehrhardt wrote:
> Since a3ab6d42 "apparmor: convert libvirtd profile to a named profile"
> the detection of the subelement for qemu_bridge_helper is wrong.
> 
> In combination with the older 123cc3e1 "apparmor: allow
> /usr/lib/qemu/qemu-bridge-helper" it now detects qemu-bridge-helper no
> more with its path, but instead as a proper subelement of the named profile
> like: label=libvirtd//qemu_bridge_helper
> 
> In the same fashion the reverse rule in the qemu_bridge_helper
> sub-profile still uses the path and not the named profile label.
> 
> Triggering denies like:
> apparmor="DENIED" operation="file_inherit"
>    profile="libvirtd//qemu_bridge_helper" pid=5629 comm="qemu-bridge-hel"
>    family="unix" sock_type="stream" protocol=0 requested_mask="send receive"
>    denied_mask="send receive" addr=none peer_addr=none peer="libvirtd"
> 
> This patch fixes the unix socket rules for the communication between
> libvirtd and qemu-bridge-helper to match that.
> 
> Fixes: a3ab6d42d825499af44b8f19f9299e150d9687bc
> Fixes: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1655111
> 
> Signed-off-by: Christian Ehrhardt <christian.ehrhardt at canonical.com>
> ---
>   src/security/apparmor/usr.sbin.libvirtd | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)

Reviewed-by: Michal Privoznik <mprivozn at redhat.com>

Michal