docker/bsc1073877-0001-apparmor-clobber-docker-default-profile-on-start.patch

From a67925f5d977db2b5a1b0162149cbd0de2b20598 Mon Sep 17 00:00:00 2001
From: Aleksa Sarai <asarai@suse.de>
Date: Fri, 29 Jun 2018 17:59:30 +1000
Subject: [PATCH] apparmor: clobber docker-default profile on start

In the process of making docker-default reloading far less expensive,
567ef8e7858c ("daemon: switch to 'ensure' workflow for AppArmor
profiles") mistakenly made the initial profile load at dockerd start-up
lazy. As a result, if you have a running Docker daemon and upgrade it to
a new one with an updated AppArmor profile the new profile will not take
effect (because the old one is still loaded). The fix for this is quite
trivial, and just requires us to clobber the profile on start-up.

Fixes: 567ef8e7858c ("daemon: switch to 'ensure' workflow for AppArmor profiles")
SUSE-Bugs: bsc#1099277
Signed-off-by: Aleksa Sarai <asarai@suse.de>
---
 components/engine/daemon/apparmor_default.go       | 14 ++++++++++----
 .../engine/daemon/apparmor_default_unsupported.go  |  4 ++++
 components/engine/daemon/daemon.go                 |  5 +++--
 3 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/components/engine/daemon/apparmor_default.go b/components/engine/daemon/apparmor_default.go
index 461f5c7f96b2..8f21c5c0c566 100644
--- a/components/engine/daemon/apparmor_default.go
+++ b/components/engine/daemon/apparmor_default.go
@@ -14,6 +14,15 @@ const (
 	defaultApparmorProfile = "docker-default"
 )
 
+func clobberDefaultAppArmorProfile() error {
+	if apparmor.IsEnabled() {
+		if err := aaprofile.InstallDefault(defaultApparmorProfile); err != nil {
+			return fmt.Errorf("AppArmor enabled on system but the %s profile could not be loaded: %s", defaultApparmorProfile, err)
+		}
+	}
+	return nil
+}
+
 func ensureDefaultAppArmorProfile() error {
 	if apparmor.IsEnabled() {
 		loaded, err := aaprofile.IsLoaded(defaultApparmorProfile)
@@ -27,10 +36,7 @@ func ensureDefaultAppArmorProfile() error {
 		}
 
 		// Load the profile.
-		if err := aaprofile.InstallDefault(defaultApparmorProfile); err != nil {
-			return fmt.Errorf("AppArmor enabled on system but the %s profile could not be loaded: %s", defaultApparmorProfile, err)
-		}
+		return clobberDefaultAppArmorProfile()
 	}
-
 	return nil
 }
diff --git a/components/engine/daemon/apparmor_default_unsupported.go b/components/engine/daemon/apparmor_default_unsupported.go
index 51f9c526b350..97d7758442ee 100644
--- a/components/engine/daemon/apparmor_default_unsupported.go
+++ b/components/engine/daemon/apparmor_default_unsupported.go
@@ -2,6 +2,10 @@
 
 package daemon // import "github.com/docker/docker/daemon"
 
+func clobberDefaultAppArmorProfile() error {
+	return nil
+}
+
 func ensureDefaultAppArmorProfile() error {
 	return nil
 }
diff --git a/components/engine/daemon/daemon.go b/components/engine/daemon/daemon.go
index f049b0d2a41f..7bd89e76b32f 100644
--- a/components/engine/daemon/daemon.go
+++ b/components/engine/daemon/daemon.go
@@ -807,8 +807,9 @@ func NewDaemon(ctx context.Context, config *config.Config, pluginStore *plugin.S
 		logrus.Warnf("Failed to configure golang's threads limit: %v", err)
 	}
 
-	// ensureDefaultAppArmorProfile does nothing if apparmor is disabled
-	if err := ensureDefaultAppArmorProfile(); err != nil {
+	// Make sure we clobber any pre-existing docker-default profile to ensure
+	// that upgrades to the profile actually work smoothly.
+	if err := clobberDefaultAppArmorProfile(); err != nil {
 		logrus.Errorf(err.Error())
 	}
 
-- 
2.22.0