[libvirt] [PATCH 06/12] security: selinux: Take parent security label into account

Peter Krempa posted 12 patches 8 years, 3 months ago
[libvirt] [PATCH 06/12] security: selinux: Take parent security label into account
Posted by Peter Krempa 8 years, 3 months ago
Until now we ignored user-provided backing chains and while detecting
the code inherited labels of the parent device. With user provided
chains we should keep this functionality, so label of the parent image
in the backing chain will be applied if an image-specific label is not
present.
---
 src/security/security_selinux.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/security/security_selinux.c b/src/security/security_selinux.c
index 66b3bbf1c..ed1828a12 100644
--- a/src/security/security_selinux.c
+++ b/src/security/security_selinux.c
@@ -1597,6 +1597,7 @@ virSecuritySELinuxSetImageLabelInternal(virSecurityManagerPtr mgr,
     virSecuritySELinuxDataPtr data = virSecurityManagerGetPrivateData(mgr);
     virSecurityLabelDefPtr secdef;
     virSecurityDeviceLabelDefPtr disk_seclabel;
+    virSecurityDeviceLabelDefPtr parent_seclabel = NULL;
     int ret;

     if (!src->path || !virStorageSourceIsLocalStorage(src))
@@ -1608,12 +1609,20 @@ virSecuritySELinuxSetImageLabelInternal(virSecurityManagerPtr mgr,

     disk_seclabel = virStorageSourceGetSecurityLabelDef(src,
                                                         SECURITY_SELINUX_NAME);
+    if (parent)
+        parent_seclabel = virStorageSourceGetSecurityLabelDef(parent,
+                                                              SECURITY_SELINUX_NAME);

-    if (disk_seclabel && !disk_seclabel->relabel)
-        return 0;
+    if (disk_seclabel && (!disk_seclabel->relabel || disk_seclabel->label)) {
+        if (!disk_seclabel->relabel)
+            return 0;

-    if (disk_seclabel && disk_seclabel->relabel && disk_seclabel->label) {
         ret = virSecuritySELinuxSetFilecon(mgr, src->path, disk_seclabel->label);
+    } else if (parent_seclabel && (!parent_seclabel->relabel || parent_seclabel->label)) {
+        if (!parent_seclabel->relabel)
+            return 0;
+
+        ret = virSecuritySELinuxSetFilecon(mgr, src->path, parent_seclabel->label);
     } else if (!parent || parent == src) {
         if (src->shared) {
             ret = virSecuritySELinuxSetFileconOptional(mgr,
-- 
2.14.1

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Re: [libvirt] [PATCH 06/12] security: selinux: Take parent security label into account
Posted by John Ferlan 8 years, 3 months ago

On 10/20/2017 09:47 AM, Peter Krempa wrote:
> Until now we ignored user-provided backing chains and while detecting
> the code inherited labels of the parent device. With user provided
> chains we should keep this functionality, so label of the parent image
> in the backing chain will be applied if an image-specific label is not
> present.
> ---
>  src/security/security_selinux.c | 15 ++++++++++++---
>  1 file changed, 12 insertions(+), 3 deletions(-)
> 

Reviewed-by: John Ferlan <jferlan@redhat.com>

John

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