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apparmor: let image label setting loop over backing files

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When adding a rule for an image file and that image file has a chain
of backing files then we need to add a rule for each of those files.

To get that iterate over the backing file chain the same way as
dac/selinux already do and add a label for each.

Fixes: https://gitlab.com/libvirt/libvirt/-/issues/118

Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jim Fehlig <jfehlig@suse.com>
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
This commit is contained in:
Christian Ehrhardt 2021-01-13 12:32:18 +01:00
parent d40aa77c8e
commit d51ad0008d
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GPG Key ID: BA3E29338280B242
1 changed files with 27 additions and 12 deletions
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37
src/security/security_apparmor.c
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@ -756,22 +756,13 @@ AppArmorRestoreInputLabel(virSecurityManagerPtr mgr,
/* Called when hotplugging */
static int
AppArmorSetSecurityImageLabel(virSecurityManagerPtr mgr,
AppArmorSetSecurityImageLabelInternal(virSecurityManagerPtr mgr,
virDomainDefPtr def,
virStorageSourcePtr src,
virSecurityDomainImageLabelFlags flags G_GNUC_UNUSED)
virStorageSourcePtr src)
{
virSecurityLabelDefPtr secdef;
g_autofree char *vfioGroupDev = NULL;
const char *path;
secdef = virDomainDefGetSecurityLabelDef(def, SECURITY_APPARMOR_NAME);
if (!secdef || !secdef->relabel)
return 0;
if (!secdef->imagelabel)
return 0;
if (src->type == VIR_STORAGE_TYPE_NVME) {
const virStorageSourceNVMeDef *nvme = src->nvme;
@ -797,6 +788,30 @@ AppArmorSetSecurityImageLabel(virSecurityManagerPtr mgr,
return reload_profile(mgr, def, path, true);
}
static int
AppArmorSetSecurityImageLabel(virSecurityManagerPtr mgr,
virDomainDefPtr def,
virStorageSourcePtr src,
virSecurityDomainImageLabelFlags flags G_GNUC_UNUSED)
{
virSecurityLabelDefPtr secdef;
virStorageSourcePtr n;
secdef = virDomainDefGetSecurityLabelDef(def, SECURITY_APPARMOR_NAME);
if (!secdef || !secdef->relabel)
return 0;
if (!secdef->imagelabel)
return 0;
for (n = src; virStorageSourceIsBacking(n); n = n->backingStore) {
if (AppArmorSetSecurityImageLabelInternal(mgr, def, n) < 0)
return -1;
}
return 0;
}
static int
AppArmorSecurityVerify(virSecurityManagerPtr mgr G_GNUC_UNUSED,
virDomainDefPtr def)