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authorPaolo Abeni <pabeni@redhat.com>2022-12-13 09:24:49 +0100
committerPaolo Abeni <pabeni@redhat.com>2022-12-13 09:49:29 +0100
commitb11919e1bb7f6f6273f5a33947b8496da2769eb8 (patch)
treef2ff877b9b0363f8fc97f1c94316f763904ec41f /net
parentd1c722867f8022a27182b9a1d84e9bca75486c9a (diff)
parente095493091e850d5292ad01d8fbf5cde1d89ac53 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Merge in the left-over fixes before the net-next pull-request. net/mptcp/subflow.c d3295fee3c75 ("mptcp: use proper req destructor for IPv6") 36b122baf6a8 ("mptcp: add subflow_v(4,6)_send_synack()") Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'net')
-rw-r--r--net/dsa/tag_8021q.c11
-rw-r--r--net/ipv4/syncookies.c7
-rw-r--r--net/ipv4/udp_tunnel_core.c1
-rw-r--r--net/ipv6/datagram.c15
-rw-r--r--net/mptcp/pm_userspace.c4
-rw-r--r--net/mptcp/subflow.c61
-rw-r--r--net/unix/af_unix.c1
-rw-r--r--net/vmw_vsock/vmci_transport.c6
8 files changed, 85 insertions, 21 deletions
diff --git a/net/dsa/tag_8021q.c b/net/dsa/tag_8021q.c
index b1263917fcb2..5ee9ef00954e 100644
--- a/net/dsa/tag_8021q.c
+++ b/net/dsa/tag_8021q.c
@@ -415,6 +415,7 @@ static void dsa_tag_8021q_teardown(struct dsa_switch *ds)
int dsa_tag_8021q_register(struct dsa_switch *ds, __be16 proto)
{
struct dsa_8021q_context *ctx;
+ int err;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
@@ -427,7 +428,15 @@ int dsa_tag_8021q_register(struct dsa_switch *ds, __be16 proto)
ds->tag_8021q_ctx = ctx;
- return dsa_tag_8021q_setup(ds);
+ err = dsa_tag_8021q_setup(ds);
+ if (err)
+ goto err_free;
+
+ return 0;
+
+err_free:
+ kfree(ctx);
+ return err;
}
EXPORT_SYMBOL_GPL(dsa_tag_8021q_register);
diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
index 942d2dfa1115..26fb97d1d4d9 100644
--- a/net/ipv4/syncookies.c
+++ b/net/ipv4/syncookies.c
@@ -288,12 +288,11 @@ struct request_sock *cookie_tcp_reqsk_alloc(const struct request_sock_ops *ops,
struct tcp_request_sock *treq;
struct request_sock *req;
-#ifdef CONFIG_MPTCP
if (sk_is_mptcp(sk))
- ops = &mptcp_subflow_request_sock_ops;
-#endif
+ req = mptcp_subflow_reqsk_alloc(ops, sk, false);
+ else
+ req = inet_reqsk_alloc(ops, sk, false);
- req = inet_reqsk_alloc(ops, sk, false);
if (!req)
return NULL;
diff --git a/net/ipv4/udp_tunnel_core.c b/net/ipv4/udp_tunnel_core.c
index 8242c8947340..5f8104cf082d 100644
--- a/net/ipv4/udp_tunnel_core.c
+++ b/net/ipv4/udp_tunnel_core.c
@@ -176,6 +176,7 @@ EXPORT_SYMBOL_GPL(udp_tunnel_xmit_skb);
void udp_tunnel_sock_release(struct socket *sock)
{
rcu_assign_sk_user_data(sock->sk, NULL);
+ synchronize_rcu();
kernel_sock_shutdown(sock, SHUT_RDWR);
sock_release(sock);
}
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 7c7155b48f17..e624497fa992 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -42,24 +42,29 @@ static void ip6_datagram_flow_key_init(struct flowi6 *fl6, struct sock *sk)
{
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
+ int oif = sk->sk_bound_dev_if;
memset(fl6, 0, sizeof(*fl6));
fl6->flowi6_proto = sk->sk_protocol;
fl6->daddr = sk->sk_v6_daddr;
fl6->saddr = np->saddr;
- fl6->flowi6_oif = sk->sk_bound_dev_if;
fl6->flowi6_mark = sk->sk_mark;
fl6->fl6_dport = inet->inet_dport;
fl6->fl6_sport = inet->inet_sport;
fl6->flowlabel = np->flow_label;
fl6->flowi6_uid = sk->sk_uid;
- if (!fl6->flowi6_oif)
- fl6->flowi6_oif = np->sticky_pktinfo.ipi6_ifindex;
+ if (!oif)
+ oif = np->sticky_pktinfo.ipi6_ifindex;
- if (!fl6->flowi6_oif && ipv6_addr_is_multicast(&fl6->daddr))
- fl6->flowi6_oif = np->mcast_oif;
+ if (!oif) {
+ if (ipv6_addr_is_multicast(&fl6->daddr))
+ oif = np->mcast_oif;
+ else
+ oif = np->ucast_oif;
+ }
+ fl6->flowi6_oif = oif;
security_sk_classify_flow(sk, flowi6_to_flowi_common(fl6));
}
diff --git a/net/mptcp/pm_userspace.c b/net/mptcp/pm_userspace.c
index 5cb65f0928f4..65dcc55a8ad8 100644
--- a/net/mptcp/pm_userspace.c
+++ b/net/mptcp/pm_userspace.c
@@ -156,6 +156,7 @@ int mptcp_nl_cmd_announce(struct sk_buff *skb, struct genl_info *info)
if (addr_val.addr.id == 0 || !(addr_val.flags & MPTCP_PM_ADDR_FLAG_SIGNAL)) {
GENL_SET_ERR_MSG(info, "invalid addr id or flags");
+ err = -EINVAL;
goto announce_err;
}
@@ -282,6 +283,7 @@ int mptcp_nl_cmd_sf_create(struct sk_buff *skb, struct genl_info *info)
if (addr_l.id == 0) {
NL_SET_ERR_MSG_ATTR(info->extack, laddr, "missing local addr id");
+ err = -EINVAL;
goto create_err;
}
@@ -395,11 +397,13 @@ int mptcp_nl_cmd_sf_destroy(struct sk_buff *skb, struct genl_info *info)
if (addr_l.family != addr_r.family) {
GENL_SET_ERR_MSG(info, "address families do not match");
+ err = -EINVAL;
goto destroy_err;
}
if (!addr_l.port || !addr_r.port) {
GENL_SET_ERR_MSG(info, "missing local or remote port");
+ err = -EINVAL;
goto destroy_err;
}
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 29904303f5c2..d1d32a66ae3f 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -45,7 +45,6 @@ static void subflow_req_destructor(struct request_sock *req)
sock_put((struct sock *)subflow_req->msk);
mptcp_token_destroy_request(req);
- tcp_request_sock_ops.destructor(req);
}
static void subflow_generate_hmac(u64 key1, u64 key2, u32 nonce1, u32 nonce2,
@@ -590,7 +589,7 @@ static int subflow_v6_rebuild_header(struct sock *sk)
}
#endif
-struct request_sock_ops mptcp_subflow_request_sock_ops;
+static struct request_sock_ops mptcp_subflow_v4_request_sock_ops __ro_after_init;
static struct tcp_request_sock_ops subflow_request_sock_ipv4_ops __ro_after_init;
static int subflow_v4_conn_request(struct sock *sk, struct sk_buff *skb)
@@ -603,7 +602,7 @@ static int subflow_v4_conn_request(struct sock *sk, struct sk_buff *skb)
if (skb_rtable(skb)->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))
goto drop;
- return tcp_conn_request(&mptcp_subflow_request_sock_ops,
+ return tcp_conn_request(&mptcp_subflow_v4_request_sock_ops,
&subflow_request_sock_ipv4_ops,
sk, skb);
drop:
@@ -611,7 +610,14 @@ drop:
return 0;
}
+static void subflow_v4_req_destructor(struct request_sock *req)
+{
+ subflow_req_destructor(req);
+ tcp_request_sock_ops.destructor(req);
+}
+
#if IS_ENABLED(CONFIG_MPTCP_IPV6)
+static struct request_sock_ops mptcp_subflow_v6_request_sock_ops __ro_after_init;
static struct tcp_request_sock_ops subflow_request_sock_ipv6_ops __ro_after_init;
static struct inet_connection_sock_af_ops subflow_v6_specific __ro_after_init;
static struct inet_connection_sock_af_ops subflow_v6m_specific __ro_after_init;
@@ -634,15 +640,36 @@ static int subflow_v6_conn_request(struct sock *sk, struct sk_buff *skb)
return 0;
}
- return tcp_conn_request(&mptcp_subflow_request_sock_ops,
+ return tcp_conn_request(&mptcp_subflow_v6_request_sock_ops,
&subflow_request_sock_ipv6_ops, sk, skb);
drop:
tcp_listendrop(sk);
return 0; /* don't send reset */
}
+
+static void subflow_v6_req_destructor(struct request_sock *req)
+{
+ subflow_req_destructor(req);
+ tcp6_request_sock_ops.destructor(req);
+}
+#endif
+
+struct request_sock *mptcp_subflow_reqsk_alloc(const struct request_sock_ops *ops,
+ struct sock *sk_listener,
+ bool attach_listener)
+{
+ if (ops->family == AF_INET)
+ ops = &mptcp_subflow_v4_request_sock_ops;
+#if IS_ENABLED(CONFIG_MPTCP_IPV6)
+ else if (ops->family == AF_INET6)
+ ops = &mptcp_subflow_v6_request_sock_ops;
#endif
+ return inet_reqsk_alloc(ops, sk_listener, attach_listener);
+}
+EXPORT_SYMBOL(mptcp_subflow_reqsk_alloc);
+
/* validate hmac received in third ACK */
static bool subflow_hmac_valid(const struct request_sock *req,
const struct mptcp_options_received *mp_opt)
@@ -1963,7 +1990,6 @@ static struct tcp_ulp_ops subflow_ulp_ops __read_mostly = {
static int subflow_ops_init(struct request_sock_ops *subflow_ops)
{
subflow_ops->obj_size = sizeof(struct mptcp_subflow_request_sock);
- subflow_ops->slab_name = "request_sock_subflow";
subflow_ops->slab = kmem_cache_create(subflow_ops->slab_name,
subflow_ops->obj_size, 0,
@@ -1973,16 +1999,17 @@ static int subflow_ops_init(struct request_sock_ops *subflow_ops)
if (!subflow_ops->slab)
return -ENOMEM;
- subflow_ops->destructor = subflow_req_destructor;
-
return 0;
}
void __init mptcp_subflow_init(void)
{
- mptcp_subflow_request_sock_ops = tcp_request_sock_ops;
- if (subflow_ops_init(&mptcp_subflow_request_sock_ops) != 0)
- panic("MPTCP: failed to init subflow request sock ops\n");
+ mptcp_subflow_v4_request_sock_ops = tcp_request_sock_ops;
+ mptcp_subflow_v4_request_sock_ops.slab_name = "request_sock_subflow_v4";
+ mptcp_subflow_v4_request_sock_ops.destructor = subflow_v4_req_destructor;
+
+ if (subflow_ops_init(&mptcp_subflow_v4_request_sock_ops) != 0)
+ panic("MPTCP: failed to init subflow v4 request sock ops\n");
subflow_request_sock_ipv4_ops = tcp_request_sock_ipv4_ops;
subflow_request_sock_ipv4_ops.route_req = subflow_v4_route_req;
@@ -1998,6 +2025,20 @@ void __init mptcp_subflow_init(void)
tcp_prot_override.release_cb = tcp_release_cb_override;
#if IS_ENABLED(CONFIG_MPTCP_IPV6)
+ /* In struct mptcp_subflow_request_sock, we assume the TCP request sock
+ * structures for v4 and v6 have the same size. It should not changed in
+ * the future but better to make sure to be warned if it is no longer
+ * the case.
+ */
+ BUILD_BUG_ON(sizeof(struct tcp_request_sock) != sizeof(struct tcp6_request_sock));
+
+ mptcp_subflow_v6_request_sock_ops = tcp6_request_sock_ops;
+ mptcp_subflow_v6_request_sock_ops.slab_name = "request_sock_subflow_v6";
+ mptcp_subflow_v6_request_sock_ops.destructor = subflow_v6_req_destructor;
+
+ if (subflow_ops_init(&mptcp_subflow_v6_request_sock_ops) != 0)
+ panic("MPTCP: failed to init subflow v6 request sock ops\n");
+
subflow_request_sock_ipv6_ops = tcp_request_sock_ipv6_ops;
subflow_request_sock_ipv6_ops.route_req = subflow_v6_route_req;
subflow_request_sock_ipv6_ops.send_synack = subflow_v6_send_synack;
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index b3545fc68097..ede2b2a140a4 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -3738,6 +3738,7 @@ static int __init af_unix_init(void)
rc = proto_register(&unix_stream_proto, 1);
if (rc != 0) {
pr_crit("%s: Cannot create unix_sock SLAB cache!\n", __func__);
+ proto_unregister(&unix_dgram_proto);
goto out;
}
diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c
index 842c94286d31..36eb16a40745 100644
--- a/net/vmw_vsock/vmci_transport.c
+++ b/net/vmw_vsock/vmci_transport.c
@@ -1711,7 +1711,11 @@ static int vmci_transport_dgram_enqueue(
if (!dg)
return -ENOMEM;
- memcpy_from_msg(VMCI_DG_PAYLOAD(dg), msg, len);
+ err = memcpy_from_msg(VMCI_DG_PAYLOAD(dg), msg, len);
+ if (err) {
+ kfree(dg);
+ return err;
+ }
dg->dst = vmci_make_handle(remote_addr->svm_cid,
remote_addr->svm_port);