Merge branch 'inet6_destroy_sock-calls-remove'

davem330 · davem330 · commit 04d63e62efa4 · 2022-10-24T09:40:39.000+01:00
Kuniyuki Iwashima says: ==================== inet6: Remove inet6_destroy_sock() calls. This is a follow-up series for commit d38afee ("tcp/udp: Call inet6_destroy_sock() in IPv6 sk->sk_destruct()."). This series cleans up unnecessary inet6_destory_sock() calls in sk->sk_prot->destroy() and call it from sk->sk_destruct() to make sure we do not leak memory related to IPv6 specific-resources. Changes: v2: * patch 1 * Fix build failure for CONFIG_MPTCP_IPV6=y v1: https://lore.kernel.org/netdev/20221018190956.1308-1-kuniyu@amazon.com/ ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/transp_v6.h b/include/net/transp_v6.h
@@ -58,8 +58,6 @@ ip6_dgram_sock_seq_show(struct seq_file *seq, struct sock *sp, __u16 srcp,
 
 #define LOOPBACK4_IPV6 cpu_to_be32(0x7f000006)
 
-void inet6_destroy_sock(struct sock *sk);
-
 #define IPV6_SEQ_DGRAM_HEADER					       \
 	"  sl  "						       \
 	"local_address                         "		       \
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
@@ -278,6 +278,7 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
 int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
 			 const struct dccp_hdr *dh, const unsigned int len);
 
+void dccp_destruct_common(struct sock *sk);
 int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized);
 void dccp_destroy_sock(struct sock *sk);
 
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
@@ -1021,6 +1021,12 @@ static const struct inet_connection_sock_af_ops dccp_ipv6_mapped = {
 	.sockaddr_len	   = sizeof(struct sockaddr_in6),
 };
 
+static void dccp_v6_sk_destruct(struct sock *sk)
+{
+	dccp_destruct_common(sk);
+	inet6_sock_destruct(sk);
+}
+
 /* NOTE: A lot of things set to zero explicitly by call to
  *       sk_alloc() so need not be done here.
  */
@@ -1033,17 +1039,12 @@ static int dccp_v6_init_sock(struct sock *sk)
 		if (unlikely(!dccp_v6_ctl_sock_initialized))
 			dccp_v6_ctl_sock_initialized = 1;
 		inet_csk(sk)->icsk_af_ops = &dccp_ipv6_af_ops;
+		sk->sk_destruct = dccp_v6_sk_destruct;
 	}
 
 	return err;
 }
 
-static void dccp_v6_destroy_sock(struct sock *sk)
-{
-	dccp_destroy_sock(sk);
-	inet6_destroy_sock(sk);
-}
-
 static struct timewait_sock_ops dccp6_timewait_sock_ops = {
 	.twsk_obj_size	= sizeof(struct dccp6_timewait_sock),
 };
@@ -1066,7 +1067,7 @@ static struct proto dccp_v6_prot = {
 	.accept		   = inet_csk_accept,
 	.get_port	   = inet_csk_get_port,
 	.shutdown	   = dccp_shutdown,
-	.destroy	   = dccp_v6_destroy_sock,
+	.destroy	   = dccp_destroy_sock,
 	.orphan_count	   = &dccp_orphan_count,
 	.max_header	   = MAX_DCCP_HEADER,
 	.obj_size	   = sizeof(struct dccp6_sock),
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
@@ -171,12 +171,18 @@ const char *dccp_packet_name(const int type)
 
 EXPORT_SYMBOL_GPL(dccp_packet_name);
 
-static void dccp_sk_destruct(struct sock *sk)
+void dccp_destruct_common(struct sock *sk)
 {
 	struct dccp_sock *dp = dccp_sk(sk);
 
 	ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk);
 	dp->dccps_hc_tx_ccid = NULL;
+}
+EXPORT_SYMBOL_GPL(dccp_destruct_common);
+
+static void dccp_sk_destruct(struct sock *sk)
+{
+	dccp_destruct_common(sk);
 	inet_sock_destruct(sk);
 }
 
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
@@ -114,6 +114,7 @@ void inet6_sock_destruct(struct sock *sk)
 	inet6_cleanup_sock(sk);
 	inet_sock_destruct(sk);
 }
+EXPORT_SYMBOL_GPL(inet6_sock_destruct);
 
 static int inet6_create(struct net *net, struct socket *sock, int protocol,
 			int kern)
@@ -489,7 +490,7 @@ int inet6_release(struct socket *sock)
 }
 EXPORT_SYMBOL(inet6_release);
 
-void inet6_destroy_sock(struct sock *sk)
+void inet6_cleanup_sock(struct sock *sk)
 {
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct sk_buff *skb;
@@ -514,12 +515,6 @@ void inet6_destroy_sock(struct sock *sk)
 		txopt_put(opt);
 	}
 }
-EXPORT_SYMBOL_GPL(inet6_destroy_sock);
-
-void inet6_cleanup_sock(struct sock *sk)
-{
-	inet6_destroy_sock(sk);
-}
 EXPORT_SYMBOL_GPL(inet6_cleanup_sock);
 
 /*
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
@@ -1005,10 +1005,8 @@ int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 	return retv;
 
 e_inval:
-	sockopt_release_sock(sk);
-	if (needs_rtnl)
-		rtnl_unlock();
-	return -EINVAL;
+	retv = -EINVAL;
+	goto unlock;
 }
 
 int ipv6_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
diff --git a/net/ipv6/ping.c b/net/ipv6/ping.c
@@ -23,11 +23,6 @@
 #include <linux/bpf-cgroup.h>
 #include <net/ping.h>
 
-static void ping_v6_destroy(struct sock *sk)
-{
-	inet6_destroy_sock(sk);
-}
-
 /* Compatibility glue so we can support IPv6 when it's compiled as a module */
 static int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len,
 				 int *addr_len)
@@ -205,7 +200,6 @@ struct proto pingv6_prot = {
 	.owner =	THIS_MODULE,
 	.init =		ping_init_sock,
 	.close =	ping_close,
-	.destroy =	ping_v6_destroy,
 	.pre_connect =	ping_v6_pre_connect,
 	.connect =	ip6_datagram_connect_v6_only,
 	.disconnect =	__udp_disconnect,
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
@@ -1173,8 +1173,6 @@ static void raw6_destroy(struct sock *sk)
 	lock_sock(sk);
 	ip6_flush_pending_frames(sk);
 	release_sock(sk);
-
-	inet6_destroy_sock(sk);
 }
 
 static int rawv6_init_sk(struct sock *sk)
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
@@ -1966,12 +1966,6 @@ static int tcp_v6_init_sock(struct sock *sk)
 	return 0;
 }
 
-static void tcp_v6_destroy_sock(struct sock *sk)
-{
-	tcp_v4_destroy_sock(sk);
-	inet6_destroy_sock(sk);
-}
-
 #ifdef CONFIG_PROC_FS
 /* Proc filesystem TCPv6 sock list dumping. */
 static void get_openreq6(struct seq_file *seq,
@@ -2164,7 +2158,7 @@ struct proto tcpv6_prot = {
 	.accept			= inet_csk_accept,
 	.ioctl			= tcp_ioctl,
 	.init			= tcp_v6_init_sock,
-	.destroy		= tcp_v6_destroy_sock,
+	.destroy		= tcp_v4_destroy_sock,
 	.shutdown		= tcp_shutdown,
 	.setsockopt		= tcp_setsockopt,
 	.getsockopt		= tcp_getsockopt,
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
@@ -1661,8 +1661,6 @@ void udpv6_destroy_sock(struct sock *sk)
 			udp_encap_disable();
 		}
 	}
-
-	inet6_destroy_sock(sk);
 }
 
 /*
diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c
@@ -257,8 +257,6 @@ static void l2tp_ip6_destroy_sock(struct sock *sk)
 
 	if (tunnel)
 		l2tp_tunnel_delete(tunnel);
-
-	inet6_destroy_sock(sk);
 }
 
 static int l2tp_ip6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
@@ -3898,12 +3898,6 @@ static const struct proto_ops mptcp_v6_stream_ops = {
 
 static struct proto mptcp_v6_prot;
 
-static void mptcp_v6_destroy(struct sock *sk)
-{
-	mptcp_destroy(sk);
-	inet6_destroy_sock(sk);
-}
-
 static struct inet_protosw mptcp_v6_protosw = {
 	.type		= SOCK_STREAM,
 	.protocol	= IPPROTO_MPTCP,
@@ -3919,7 +3913,6 @@ int __init mptcp_proto_v6_init(void)
 	mptcp_v6_prot = mptcp_prot;
 	strcpy(mptcp_v6_prot.name, "MPTCPv6");
 	mptcp_v6_prot.slab = NULL;
-	mptcp_v6_prot.destroy = mptcp_v6_destroy;
 	mptcp_v6_prot.obj_size = sizeof(struct mptcp6_sock);
 
 	err = proto_register(&mptcp_v6_prot, 1);
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
@@ -5098,13 +5098,17 @@ static void sctp_destroy_sock(struct sock *sk)
 }
 
 /* Triggered when there are no references on the socket anymore */
-static void sctp_destruct_sock(struct sock *sk)
+static void sctp_destruct_common(struct sock *sk)
 {
 	struct sctp_sock *sp = sctp_sk(sk);
 
 	/* Free up the HMAC transform. */
 	crypto_free_shash(sp->hmac);
+}
 
+static void sctp_destruct_sock(struct sock *sk)
+{
+	sctp_destruct_common(sk);
 	inet_sock_destruct(sk);
 }
 
@@ -9427,7 +9431,7 @@ void sctp_copy_sock(struct sock *newsk, struct sock *sk,
 	sctp_sk(newsk)->reuse = sp->reuse;
 
 	newsk->sk_shutdown = sk->sk_shutdown;
-	newsk->sk_destruct = sctp_destruct_sock;
+	newsk->sk_destruct = sk->sk_destruct;
 	newsk->sk_family = sk->sk_family;
 	newsk->sk_protocol = IPPROTO_SCTP;
 	newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
@@ -9662,11 +9666,20 @@ struct proto sctp_prot = {
 
 #if IS_ENABLED(CONFIG_IPV6)
 
-#include <net/transp_v6.h>
-static void sctp_v6_destroy_sock(struct sock *sk)
+static void sctp_v6_destruct_sock(struct sock *sk)
+{
+	sctp_destruct_common(sk);
+	inet6_sock_destruct(sk);
+}
+
+static int sctp_v6_init_sock(struct sock *sk)
 {
-	sctp_destroy_sock(sk);
-	inet6_destroy_sock(sk);
+	int ret = sctp_init_sock(sk);
+
+	if (!ret)
+		sk->sk_destruct = sctp_v6_destruct_sock;
+
+	return ret;
 }
 
 struct proto sctpv6_prot = {
@@ -9676,8 +9689,8 @@ struct proto sctpv6_prot = {
 	.disconnect	= sctp_disconnect,
 	.accept		= sctp_accept,
 	.ioctl		= sctp_ioctl,
-	.init		= sctp_init_sock,
-	.destroy	= sctp_v6_destroy_sock,
+	.init		= sctp_v6_init_sock,
+	.destroy	= sctp_destroy_sock,
 	.shutdown	= sctp_shutdown,
 	.setsockopt	= sctp_setsockopt,
 	.getsockopt	= sctp_getsockopt,

Original file line number	Diff line number	Diff line change
`@@ -114,6 +114,7 @@ void inet6_sock_destruct(struct sock *sk)`
`114`	`114`	`inet6_cleanup_sock(sk);`
`115`	`115`	`inet_sock_destruct(sk);`
`116`	`116`	`}`
	`117`	`+EXPORT_SYMBOL_GPL(inet6_sock_destruct);`
`117`	`118`
`118`	`119`	`static int inet6_create(struct net net, struct socket sock, int protocol,`
`119`	`120`	`int kern)`
`@@ -489,7 +490,7 @@ int inet6_release(struct socket *sock)`
`489`	`490`	`}`
`490`	`491`	`EXPORT_SYMBOL(inet6_release);`
`491`	`492`
`492`		`-void inet6_destroy_sock(struct sock *sk)`
	`493`	`+void inet6_cleanup_sock(struct sock *sk)`
`493`	`494`	`{`
`494`	`495`	`struct ipv6_pinfo *np = inet6_sk(sk);`
`495`	`496`	`struct sk_buff *skb;`
`@@ -514,12 +515,6 @@ void inet6_destroy_sock(struct sock *sk)`
`514`	`515`	`txopt_put(opt);`
`515`	`516`	`}`
`516`	`517`	`}`
`517`		`-EXPORT_SYMBOL_GPL(inet6_destroy_sock);`
`518`		`-`
`519`		`-void inet6_cleanup_sock(struct sock *sk)`
`520`		`-{`
`521`		`- inet6_destroy_sock(sk);`
`522`		`-}`
`523`	`518`	`EXPORT_SYMBOL_GPL(inet6_cleanup_sock);`
`524`	`519`
`525`	`520`	`/*`
Original file line number	Diff line number	Diff line change
`@@ -1173,8 +1173,6 @@ static void raw6_destroy(struct sock *sk)`
`1173`	`1173`	`lock_sock(sk);`
`1174`	`1174`	`ip6_flush_pending_frames(sk);`
`1175`	`1175`	`release_sock(sk);`
`1176`		`-`
`1177`		`- inet6_destroy_sock(sk);`
`1178`	`1176`	`}`
`1179`	`1177`
`1180`	`1178`	`static int rawv6_init_sk(struct sock *sk)`
Original file line number	Diff line number	Diff line change
`@@ -1661,8 +1661,6 @@ void udpv6_destroy_sock(struct sock *sk)`
`1661`	`1661`	`udp_encap_disable();`
`1662`	`1662`	`}`
`1663`	`1663`	`}`
`1664`		`-`
`1665`		`- inet6_destroy_sock(sk);`
`1666`	`1664`	`}`
`1667`	`1665`
`1668`	`1666`	`/*`