Re: [PATCH] apparmor: Add denied capabilities

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On 6/7/21 5:43 PM, Neal Gompa wrote:
On Mon, Jun 7, 2021 at 6:34 PM Jim Fehlig <jfehlig@xxxxxxxx> wrote:

The audit log contains the following denials from libvirtd

apparmor="DENIED" operation="capable" profile="libvirtd" pid=6012 comm="daemon-init" capability=17  capname="sys_rawio"
apparmor="DENIED" operation="capable" profile="libvirtd" pid=6012 comm="rpc-worker" capability=39  capname="bpf"
apparmor="DENIED" operation="capable" profile="libvirtd" pid=6012 comm="rpc-worker" capability=38  capname="perfmon"

Squelch the denials and allow the capabilities in the libvirtd
apparmor profile.

Signed-off-by: Jim Fehlig <jfehlig@xxxxxxxx>
---

I'm not really sure when these denials first started appearing, nor
have I noticed any problems they are causing. Likely I have not exercised
the affected functionality.

  src/security/apparmor/usr.sbin.libvirtd.in | 3 +++
  1 file changed, 3 insertions(+)

diff --git a/src/security/apparmor/usr.sbin.libvirtd.in b/src/security/apparmor/usr.sbin.libvirtd.in
index bf4563e1e8..928782b709 100644
--- a/src/security/apparmor/usr.sbin.libvirtd.in
+++ b/src/security/apparmor/usr.sbin.libvirtd.in
@@ -25,6 +25,9 @@ profile libvirtd @sbindir@/libvirtd flags=(attach_disconnected) {
    capability fsetid,
    capability audit_write,
    capability ipc_lock,
+  capability sys_rawio,
+  capability bpf,
+  capability perfmon,

    # Needed for vfio
    capability sys_resource,
--
2.31.1



The patch LGTM, but the title is confusing. Maybe the following?

"apparmor: Permit new capabilities required by libvirt"

Reading again, I agree it is poorly worded. I used your suggestion, but s/libvirt/libvirtd/.

Regards,
Jim




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