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qemuDomainBuildNamespace: Populate SEV from daemon's namespace

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As mentioned in one of previous commits, populating domain's
namespace from pre-exec() hook is dangerous. This commit moves
population of the namespace with domain SEV into daemon's
namespace.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Michal Privoznik 2020-07-21 14:51:13 +02:00
parent 6483b1e32b
commit 40592f168f
1 changed files with 6 additions and 11 deletions
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17
src/qemu/qemu_namespace.c
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@ -421,7 +421,7 @@ qemuDomainCreateDeviceRecursive(const char *device,
}
static int
static int G_GNUC_UNUSED
qemuDomainCreateDevice(const char *device,
const struct qemuDomainCreateDeviceData *data,
bool allow_noent)
@ -836,7 +836,7 @@ qemuDomainSetupLoader(virDomainObjPtr vm,
static int
qemuDomainSetupLaunchSecurity(virDomainObjPtr vm,
const struct qemuDomainCreateDeviceData *data)
char ***paths)
{
virDomainSEVDefPtr sev = vm->def->sev;
@ -845,7 +845,7 @@ qemuDomainSetupLaunchSecurity(virDomainObjPtr vm,
VIR_DEBUG("Setting up launch security");
if (qemuDomainCreateDevice(QEMU_DEV_SEV, data, false) < 0)
if (virStringListAdd(paths, QEMU_DEV_SEV) < 0)
return -1;
VIR_DEBUG("Set up launch security");
@ -894,6 +894,9 @@ qemuDomainBuildNamespace(virQEMUDriverConfigPtr cfg,
if (qemuDomainSetupLoader(vm, &paths) < 0)
return -1;
if (qemuDomainSetupLaunchSecurity(vm, &paths) < 0)
return -1;
if (qemuNamespaceMknodPaths(vm, (const char **) paths) < 0)
return -1;
@ -906,7 +909,6 @@ qemuDomainUnshareNamespace(virQEMUDriverConfigPtr cfg,
virSecurityManagerPtr mgr,
virDomainObjPtr vm)
{
struct qemuDomainCreateDeviceData data;
const char *devPath = NULL;
char **devMountsPath = NULL, **devMountsSavePath = NULL;
size_t ndevMountsPath = 0, i;
@ -935,19 +937,12 @@ qemuDomainUnshareNamespace(virQEMUDriverConfigPtr cfg,
goto cleanup;
}
data.path = devPath;
data.devMountsPath = devMountsPath;
data.ndevMountsPath = ndevMountsPath;
if (virProcessSetupPrivateMountNS() < 0)
goto cleanup;
if (qemuDomainSetupDev(mgr, vm, devPath) < 0)
goto cleanup;
if (qemuDomainSetupLaunchSecurity(vm, &data) < 0)
goto cleanup;
/* Save some mount points because we want to share them with the host */
for (i = 0; i < ndevMountsPath; i++) {
struct stat sb;