[libvirt] [PATCH] bridge: check for invalid MAC in networkGetDHCPLeases

[Ján Tomko]

Instead of comparing garbage strings against real MAC addresses,
introduce an error mesage for unparsable ones:

$ virsh net-dhcp-leases default  --mac t12
error: Failed to get leases info for default
error: invalid MAC address: t12

https://bugzilla.redhat.com/show_bug.cgi?id=1261432
---
 src/network/bridge_driver.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c
index a0f6494..362e294 100644
--- a/src/network/bridge_driver.c
+++ b/src/network/bridge_driver.c
@@ -3648,9 +3648,16 @@ networkGetDHCPLeases(virNetworkPtr network,
     virNetworkDHCPLeasePtr lease = NULL;
     virNetworkDHCPLeasePtr *leases_ret = NULL;
     virNetworkObjPtr obj;
+    virMacAddr mac_addr;
 
     virCheckFlags(0, -1);
 
+    /* only to check if the MAC is valid */
+    if (mac && virMacAddrParse(mac, &mac_addr) < 0) {
+        virReportError(VIR_ERR_INVALID_MAC, "%s", mac);
+        return -1;
+    }
+
     if (!(obj = networkObjFromNetwork(network)))
         return -1;
 
-- 
2.4.6