Fix returned error when deleting non-existant address

PiperOrigin-RevId: 340149214

pkg/sentry/socket/netlink/route/protocol.go

@@ -487,7 +487,7 @@ func (p *Protocol) delAddr(ctx context.Context, msg *netlink.Message, ms *netlin
 				Addr:      value,
 			})
 			if err != nil {
-				return syserr.ErrInvalidArgument
+				return syserr.ErrBadLocalAddress
 			}
 		case linux.IFA_ADDRESS:
 		default:

test/syscalls/linux/socket_netlink_route.cc

@@ -536,7 +536,7 @@ TEST(NetlinkRouteTest, AddAndRemoveAddr) {
         // Second delete should fail, as address no longer exists.
         EXPECT_THAT(LinkDelLocalAddr(loopback_link.index, AF_INET,
                                      /*prefixlen=*/24, &addr, sizeof(addr)),
-                    PosixErrorIs(EINVAL, ::testing::_));
+                    PosixErrorIs(EADDRNOTAVAIL, ::testing::_));
       });
 
   // Replace an existing address should succeed.