Merge pull request #126 from thaJeztah/18.09_backport_mask_asound

[18.09 backport] Masked /proc/asound
Upstream-commit: 82a4418f57d5aa0d58c8bba630d701a918094c3b
Component: engine

components/engine/oci/defaults.go

@@ -114,6 +114,7 @@ func DefaultLinuxSpec() specs.Spec {
 
 	s.Linux = &specs.Linux{
 		MaskedPaths: []string{
+			"/proc/asound",
 			"/proc/acpi",
 			"/proc/kcore",
 			"/proc/keys",
@@ -125,7 +126,6 @@ func DefaultLinuxSpec() specs.Spec {
 			"/sys/firmware",
 		},
 		ReadonlyPaths: []string{
-			"/proc/asound",
 			"/proc/bus",
 			"/proc/fs",
 			"/proc/irq",