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Audit the starting of a guest using TPM passthrough

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When a VM with a TPM passthrough device is started, the audit daemon
logs the following type of message:

type=VIRT_RESOURCE msg=audit(1365170222.460:3378): pid=16382 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:virtd_t:s0-s0:c0.c1023 msg='virt=kvm resrc=dev reason=start vm="TPM-PT" uuid=a4d7cd22-da89-3094-6212-079a48a309a1 device="/dev/tpm0" exe="/usr/sbin/libvirtd" hostname=? addr=? terminal=? res=success'

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
Tested-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
This commit is contained in:
Stefan Berger 2013-04-12 16:55:46 -04:00 committed by Stefan Berger
parent 2a40a09220
commit 2c9a063973
1 changed files with 55 additions and 0 deletions
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55
src/conf/domain_audit.c
View File

@ -523,6 +523,58 @@ cleanup:
}
/**
* virDomainAuditTPM:
* @vm: domain making a change in pass-through host device
* @tpm: TPM device being attached or removed
* @reason: one of "start", "attach", or "detach"
* @success: true if the device passthrough operation succeeded
*
* Log an audit message about an attempted device passthrough change.
*/
static void
virDomainAuditTPM(virDomainObjPtr vm, virDomainTPMDefPtr tpm,
const char *reason, bool success)
{
char uuidstr[VIR_UUID_STRING_BUFLEN];
char *vmname;
char *path = NULL;
char *device = NULL;
const char *virt;
virUUIDFormat(vm->def->uuid, uuidstr);
if (!(vmname = virAuditEncode("vm", vm->def->name))) {
VIR_WARN("OOM while encoding audit message");
return;
}
if (!(virt = virDomainVirtTypeToString(vm->def->virtType))) {
VIR_WARN("Unexpected virt type %d while encoding audit message", vm->def->virtType);
virt = "?";
}
switch (tpm->type) {
case VIR_DOMAIN_TPM_TYPE_PASSTHROUGH:
path = tpm->data.passthrough.source.data.file.path;
if (!(device = virAuditEncode("device", VIR_AUDIT_STR(path)))) {
VIR_WARN("OOM while encoding audit message");
goto cleanup;
}
VIR_AUDIT(VIR_AUDIT_RECORD_RESOURCE, success,
"virt=%s resrc=dev reason=%s %s uuid=%s %s",
virt, reason, vmname, uuidstr, device);
break;
default:
break;
}
cleanup:
VIR_FREE(vmname);
VIR_FREE(device);
}
/**
* virDomainAuditCgroup:
* @vm: domain making the cgroups ACL change
@ -761,6 +813,9 @@ virDomainAuditStart(virDomainObjPtr vm, const char *reason, bool success)
if (vm->def->rng)
virDomainAuditRNG(vm, vm->def->rng, NULL, "start", true);
if (vm->def->tpm)
virDomainAuditTPM(vm, vm->def->tpm, "start", true);
virDomainAuditMemory(vm, 0, vm->def->mem.cur_balloon, "start", true);
virDomainAuditVcpu(vm, 0, vm->def->vcpus, "start", true);