[cilium:pr/wg 5/5] drivers/net/wireguard/socket.c:47:22: sparse: sparse: incorrect type in assignment (different base types)

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/cilium/linux.git pr/wg
head:   9b148f25ed218ffbc73a3cdd9e91598c61082d32
commit: 9b148f25ed218ffbc73a3cdd9e91598c61082d32 [5/5] sport hashing
config: i386-randconfig-062-20241031 (https://download.01.org/0day-ci/archive/20241031/202410312046.GbR2BUGR-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241031/202410312046.GbR2BUGR-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202410312046.GbR2BUGR-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/net/wireguard/socket.c:47:22: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __be16 [usertype] sport @@     got unsigned short [usertype] sport @@
   drivers/net/wireguard/socket.c:47:22: sparse:     expected restricted __be16 [usertype] sport
   drivers/net/wireguard/socket.c:47:22: sparse:     got unsigned short [usertype] sport
   drivers/net/wireguard/socket.c:126:22: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __be16 [usertype] sport @@     got unsigned short [usertype] sport @@
   drivers/net/wireguard/socket.c:126:22: sparse:     expected restricted __be16 [usertype] sport
   drivers/net/wireguard/socket.c:126:22: sparse:     got unsigned short [usertype] sport
--
>> drivers/net/wireguard/send.c:174:31: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned short [usertype] sport @@     got restricted __be16 @@
   drivers/net/wireguard/send.c:174:31: sparse:     expected unsigned short [usertype] sport
   drivers/net/wireguard/send.c:174:31: sparse:     got restricted __be16

vim +47 drivers/net/wireguard/socket.c

    20	
    21	static int send4(struct wg_device *wg, struct sk_buff *skb,
    22			 struct endpoint *endpoint, u8 ds, struct dst_cache *cache)
    23	{
    24		struct flowi4 fl = {
    25			.saddr = endpoint->src4.s_addr,
    26			.daddr = endpoint->addr4.sin_addr.s_addr,
    27			.fl4_dport = endpoint->addr4.sin_port,
    28			.flowi4_mark = wg->fwmark,
    29			.flowi4_proto = IPPROTO_UDP
    30		};
    31		struct rtable *rt = NULL;
    32		struct sock *sock;
    33		int ret = 0;
    34	
    35		skb_mark_not_on_list(skb);
    36		skb->dev = wg->dev;
    37		skb->mark = wg->fwmark;
    38	
    39		rcu_read_lock_bh();
    40		sock = rcu_dereference_bh(wg->sock4);
    41	
    42		if (unlikely(!sock)) {
    43			ret = -ENONET;
    44			goto err;
    45		}
    46	
  > 47		fl.fl4_sport = PACKET_CB(skb)->sport;
    48		if (cache)
    49			rt = dst_cache_get_ip4(cache, &fl.saddr);
    50	
    51		if (!rt) {
    52			security_sk_classify_flow(sock, flowi4_to_flowi_common(&fl));
    53			if (unlikely(!inet_confirm_addr(sock_net(sock), NULL, 0,
    54							fl.saddr, RT_SCOPE_HOST))) {
    55				endpoint->src4.s_addr = 0;
    56				endpoint->src_if4 = 0;
    57				fl.saddr = 0;
    58				if (cache)
    59					dst_cache_reset(cache);
    60			}
    61			rt = ip_route_output_flow(sock_net(sock), &fl, sock);
    62			if (unlikely(endpoint->src_if4 && ((IS_ERR(rt) &&
    63				     PTR_ERR(rt) == -EINVAL) || (!IS_ERR(rt) &&
    64				     rt->dst.dev->ifindex != endpoint->src_if4)))) {
    65				endpoint->src4.s_addr = 0;
    66				endpoint->src_if4 = 0;
    67				fl.saddr = 0;
    68				if (cache)
    69					dst_cache_reset(cache);
    70				if (!IS_ERR(rt))
    71					ip_rt_put(rt);
    72				rt = ip_route_output_flow(sock_net(sock), &fl, sock);
    73			}
    74			if (IS_ERR(rt)) {
    75				ret = PTR_ERR(rt);
    76				net_dbg_ratelimited("%s: No route to %pISpfsc, error %d\n",
    77						    wg->dev->name, &endpoint->addr, ret);
    78				goto err;
    79			}
    80			if (cache)
    81				dst_cache_set_ip4(cache, &rt->dst, fl.saddr);
    82		}
    83	
    84		skb->ignore_df = 1;
    85		udp_tunnel_xmit_skb(rt, sock, skb, fl.saddr, fl.daddr, ds,
    86				    ip4_dst_hoplimit(&rt->dst), 0, fl.fl4_sport,
    87				    fl.fl4_dport, false, false);
    88		goto out;
    89	
    90	err:
    91		kfree_skb(skb);
    92	out:
    93		rcu_read_unlock_bh();
    94		return ret;
    95	}
    96	

-- 
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