[sashal-stable:pending-5.10 418/427] net/ipv4/inet_connection_sock.c:1105:21: warning: assignment to 'struct sock *' from 'int' makes pointer from integer without a cast

[sashal-stable:pending-5.10 418/427] net/ipv4/inet_connection_sock.c:1105:21: warning: assignment to 'struct sock *' from 'int' makes pointer from integer without a cast

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git pending-5.10
head:   f414af0d5334f8d1a8cff50f50e6fb3921d490c4
commit: 7c133f1460cf14b5461dd14ea7ea8da69f1d9254 [418/427] tcp: Migrate TCP_ESTABLISHED/TCP_SYN_RECV sockets in accept queues.
config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20230724/202307240703.3PnrASdZ-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230724/202307240703.3PnrASdZ-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/202307240703.3PnrASdZ-lkp@intel.com/

All warnings (new ones prefixed by >>):

   net/ipv4/inet_connection_sock.c: In function 'inet_csk_listen_stop':
   net/ipv4/inet_connection_sock.c:1105:23: error: implicit declaration of function 'reuseport_migrate_sock'; did you mean 'reuseport_select_sock'? [-Werror=implicit-function-declaration]
    1105 |                 nsk = reuseport_migrate_sock(sk, child, NULL);
         |                       ^~~~~~~~~~~~~~~~~~~~~~
         |                       reuseport_select_sock
>> net/ipv4/inet_connection_sock.c:1105:21: warning: assignment to 'struct sock *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
    1105 |                 nsk = reuseport_migrate_sock(sk, child, NULL);
         |                     ^
   cc1: some warnings being treated as errors


vim +1105 net/ipv4/inet_connection_sock.c

  1077	
  1078	/*
  1079	 *	This routine closes sockets which have been at least partially
  1080	 *	opened, but not yet accepted.
  1081	 */
  1082	void inet_csk_listen_stop(struct sock *sk)
  1083	{
  1084		struct inet_connection_sock *icsk = inet_csk(sk);
  1085		struct request_sock_queue *queue = &icsk->icsk_accept_queue;
  1086		struct request_sock *next, *req;
  1087	
  1088		/* Following specs, it would be better either to send FIN
  1089		 * (and enter FIN-WAIT-1, it is normal close)
  1090		 * or to send active reset (abort).
  1091		 * Certainly, it is pretty dangerous while synflood, but it is
  1092		 * bad justification for our negligence 8)
  1093		 * To be honest, we are not able to make either
  1094		 * of the variants now.			--ANK
  1095		 */
  1096		while ((req = reqsk_queue_remove(queue, sk)) != NULL) {
  1097			struct sock *child = req->sk, *nsk;
  1098			struct request_sock *nreq;
  1099	
  1100			local_bh_disable();
  1101			bh_lock_sock(child);
  1102			WARN_ON(sock_owned_by_user(child));
  1103			sock_hold(child);
  1104	
> 1105			nsk = reuseport_migrate_sock(sk, child, NULL);
  1106			if (nsk) {
  1107				nreq = inet_reqsk_clone(req, nsk);
  1108				if (nreq) {
  1109					refcount_set(&nreq->rsk_refcnt, 1);
  1110	
  1111					if (inet_csk_reqsk_queue_add(nsk, nreq, child)) {
  1112						reqsk_migrate_reset(req);
  1113					} else {
  1114						reqsk_migrate_reset(nreq);
  1115						__reqsk_free(nreq);
  1116					}
  1117	
  1118					/* inet_csk_reqsk_queue_add() has already
  1119					 * called inet_child_forget() on failure case.
  1120					 */
  1121					goto skip_child_forget;
  1122				}
  1123			}
  1124	
  1125			inet_child_forget(sk, req, child);
  1126	skip_child_forget:
  1127			reqsk_put(req);
  1128			bh_unlock_sock(child);
  1129			local_bh_enable();
  1130			sock_put(child);
  1131	
  1132			cond_resched();
  1133		}
  1134		if (queue->fastopenq.rskq_rst_head) {
  1135			/* Free all the reqs queued in rskq_rst_head. */
  1136			spin_lock_bh(&queue->fastopenq.lock);
  1137			req = queue->fastopenq.rskq_rst_head;
  1138			queue->fastopenq.rskq_rst_head = NULL;
  1139			spin_unlock_bh(&queue->fastopenq.lock);
  1140			while (req != NULL) {
  1141				next = req->dl_next;
  1142				reqsk_put(req);
  1143				req = next;
  1144			}
  1145		}
  1146		WARN_ON_ONCE(sk->sk_ack_backlog);
  1147	}
  1148	EXPORT_SYMBOL_GPL(inet_csk_listen_stop);
  1149	

-- 
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https://github.com/intel/lkp-tests/wiki