config: add validation for IPv4NativeRoutingCIDR

Make sure the provided range is actually a v4 CIDR. Signed-off-by: Gilberto Bertin <gilberto@isovalent.com>
cilium · Jun 28, 2021 · dd69fd6 · dd69fd6
1 parent a66b2f2
commit dd69fd6
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/pkg/option/config.go b/pkg/option/config.go
@@ -2523,8 +2523,16 @@ func (c *DaemonConfig) Populate() {
 
 	if nativeRoutingCIDR != "" {
 		c.ipv4NativeRoutingCIDR = cidr.MustParseCIDR(nativeRoutingCIDR)
+
+		if len(c.ipv4NativeRoutingCIDR.IP) != net.IPv4len {
+			log.Fatalf("%s must be an IPv4 CIDR", NativeRoutingCIDR)
+		}
 	} else if ipv4NativeRoutingCIDR != "" {
 		c.ipv4NativeRoutingCIDR = cidr.MustParseCIDR(ipv4NativeRoutingCIDR)
+
+		if len(c.ipv4NativeRoutingCIDR.IP) != net.IPv4len {
+			log.Fatalf("%s must be an IPv4 CIDR", IPv4NativeRoutingCIDR)
+		}
 	}
 
 	if err := c.calculateBPFMapSizes(); err != nil {