security: Do not restore kernel and initrd labels

Kernel/initrd files are essentially read-only shareable images and thus
should be handled in the same way. We already use the appropriate label
for kernel/initrd files when starting a domain, but when a domain gets
destroyed we would remove the labels which would make other running
domains using the same files very unhappy.

https://bugzilla.redhat.com/show_bug.cgi?id=921135Signed-off-by: NJiri Denemark <jdenemar@redhat.com>
(cherry picked from commit 68acc701)

src/security/security_dac.c

@@ -971,14 +971,6 @@ virSecurityDACRestoreSecurityAllLabel(virSecurityManagerPtr mgr,
         virSecurityDACRestoreSecurityFileLabel(def->os.loader->nvram) < 0)
         rc = -1;
 
-    if (def->os.kernel &&
-        virSecurityDACRestoreSecurityFileLabel(def->os.kernel) < 0)
-        rc = -1;
-
-    if (def->os.initrd &&
-        virSecurityDACRestoreSecurityFileLabel(def->os.initrd) < 0)
-        rc = -1;
-
     if (def->os.dtb &&
         virSecurityDACRestoreSecurityFileLabel(def->os.dtb) < 0)
         rc = -1;

src/security/security_selinux.c

@@ -1978,14 +1978,6 @@ virSecuritySELinuxRestoreSecurityAllLabel(virSecurityManagerPtr mgr,
         virSecuritySELinuxRestoreSecurityFileLabel(mgr, def->os.loader->nvram) < 0)
         rc = -1;
 
-    if (def->os.kernel &&
-        virSecuritySELinuxRestoreSecurityFileLabel(mgr, def->os.kernel) < 0)
-        rc = -1;
-
-    if (def->os.initrd &&
-        virSecuritySELinuxRestoreSecurityFileLabel(mgr, def->os.initrd) < 0)
-        rc = -1;
-
     if (def->os.dtb &&
         virSecuritySELinuxRestoreSecurityFileLabel(mgr, def->os.dtb) < 0)
         rc = -1;