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-rw-r--r--net/mptcp/crypto.c2
-rw-r--r--net/mptcp/mib.c3
-rw-r--r--net/mptcp/mib.h3
-rw-r--r--net/mptcp/pm_netlink.c6
-rw-r--r--net/mptcp/protocol.c26
-rw-r--r--net/mptcp/protocol.h1
-rw-r--r--net/mptcp/subflow.c17
7 files changed, 50 insertions, 8 deletions
diff --git a/net/mptcp/crypto.c b/net/mptcp/crypto.c
index a8931349933c..b08ba959ac4f 100644
--- a/net/mptcp/crypto.c
+++ b/net/mptcp/crypto.c
@@ -22,7 +22,7 @@
#include <linux/kernel.h>
#include <crypto/sha2.h>
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
#include "protocol.h"
diff --git a/net/mptcp/mib.c b/net/mptcp/mib.c
index 38c2efc82b94..19eb9292bd60 100644
--- a/net/mptcp/mib.c
+++ b/net/mptcp/mib.c
@@ -17,6 +17,7 @@ static const struct snmp_mib mptcp_snmp_list[] = {
SNMP_MIB_ITEM("MPCapableFallbackSYNACK", MPTCP_MIB_MPCAPABLEACTIVEFALLBACK),
SNMP_MIB_ITEM("MPCapableSYNTXDrop", MPTCP_MIB_MPCAPABLEACTIVEDROP),
SNMP_MIB_ITEM("MPCapableSYNTXDisabled", MPTCP_MIB_MPCAPABLEACTIVEDISABLED),
+ SNMP_MIB_ITEM("MPCapableEndpAttempt", MPTCP_MIB_MPCAPABLEENDPATTEMPT),
SNMP_MIB_ITEM("MPFallbackTokenInit", MPTCP_MIB_TOKENFALLBACKINIT),
SNMP_MIB_ITEM("MPTCPRetrans", MPTCP_MIB_RETRANSSEGS),
SNMP_MIB_ITEM("MPJoinNoTokenFound", MPTCP_MIB_JOINNOTOKEN),
@@ -32,6 +33,8 @@ static const struct snmp_mib mptcp_snmp_list[] = {
SNMP_MIB_ITEM("MPJoinSynTxBindErr", MPTCP_MIB_JOINSYNTXBINDERR),
SNMP_MIB_ITEM("MPJoinSynTxConnectErr", MPTCP_MIB_JOINSYNTXCONNECTERR),
SNMP_MIB_ITEM("DSSNotMatching", MPTCP_MIB_DSSNOMATCH),
+ SNMP_MIB_ITEM("DSSCorruptionFallback", MPTCP_MIB_DSSCORRUPTIONFALLBACK),
+ SNMP_MIB_ITEM("DSSCorruptionReset", MPTCP_MIB_DSSCORRUPTIONRESET),
SNMP_MIB_ITEM("InfiniteMapTx", MPTCP_MIB_INFINITEMAPTX),
SNMP_MIB_ITEM("InfiniteMapRx", MPTCP_MIB_INFINITEMAPRX),
SNMP_MIB_ITEM("DSSNoMatchTCP", MPTCP_MIB_DSSTCPMISMATCH),
diff --git a/net/mptcp/mib.h b/net/mptcp/mib.h
index c8ffe18a8722..128282982843 100644
--- a/net/mptcp/mib.h
+++ b/net/mptcp/mib.h
@@ -12,6 +12,7 @@ enum linux_mptcp_mib_field {
MPTCP_MIB_MPCAPABLEACTIVEFALLBACK, /* Client-side fallback during 3-way handshake */
MPTCP_MIB_MPCAPABLEACTIVEDROP, /* Client-side fallback due to a MPC drop */
MPTCP_MIB_MPCAPABLEACTIVEDISABLED, /* Client-side disabled due to past issues */
+ MPTCP_MIB_MPCAPABLEENDPATTEMPT, /* Prohibited MPC to port-based endp */
MPTCP_MIB_TOKENFALLBACKINIT, /* Could not init/allocate token */
MPTCP_MIB_RETRANSSEGS, /* Segments retransmitted at the MPTCP-level */
MPTCP_MIB_JOINNOTOKEN, /* Received MP_JOIN but the token was not found */
@@ -27,6 +28,8 @@ enum linux_mptcp_mib_field {
MPTCP_MIB_JOINSYNTXBINDERR, /* Not able to bind() the address when sending a SYN + MP_JOIN */
MPTCP_MIB_JOINSYNTXCONNECTERR, /* Not able to connect() when sending a SYN + MP_JOIN */
MPTCP_MIB_DSSNOMATCH, /* Received a new mapping that did not match the previous one */
+ MPTCP_MIB_DSSCORRUPTIONFALLBACK,/* DSS corruption detected, fallback */
+ MPTCP_MIB_DSSCORRUPTIONRESET, /* DSS corruption detected, MPJ subflow reset */
MPTCP_MIB_INFINITEMAPTX, /* Sent an infinite mapping */
MPTCP_MIB_INFINITEMAPRX, /* Received an infinite mapping */
MPTCP_MIB_DSSTCPMISMATCH, /* DSS-mapping did not map with TCP's sequence numbers */
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index 64fe0e7d87d7..db586a5b3866 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -860,7 +860,8 @@ static void mptcp_pm_nl_rm_addr_or_subflow(struct mptcp_sock *msk,
int how = RCV_SHUTDOWN | SEND_SHUTDOWN;
u8 id = subflow_get_local_id(subflow);
- if (inet_sk_state_load(ssk) == TCP_CLOSE)
+ if ((1 << inet_sk_state_load(ssk)) &
+ (TCPF_FIN_WAIT1 | TCPF_FIN_WAIT2 | TCPF_CLOSING | TCPF_CLOSE))
continue;
if (rm_type == MPTCP_MIB_RMADDR && remote_id != rm_id)
continue;
@@ -872,12 +873,12 @@ static void mptcp_pm_nl_rm_addr_or_subflow(struct mptcp_sock *msk,
i, rm_id, id, remote_id, msk->mpc_endpoint_id);
spin_unlock_bh(&msk->pm.lock);
mptcp_subflow_shutdown(sk, ssk, how);
+ removed |= subflow->request_join;
/* the following takes care of updating the subflows counter */
mptcp_close_ssk(sk, ssk, subflow);
spin_lock_bh(&msk->pm.lock);
- removed |= subflow->request_join;
if (rm_type == MPTCP_MIB_RMSUBFLOW)
__MPTCP_INC_STATS(sock_net(sk), rm_type);
}
@@ -1120,6 +1121,7 @@ static int mptcp_pm_nl_create_listen_socket(struct sock *sk,
*/
inet_sk_state_store(newsk, TCP_LISTEN);
lock_sock(ssk);
+ WRITE_ONCE(mptcp_subflow_ctx(ssk)->pm_listener, true);
err = __inet_listen_sk(ssk, backlog);
if (!err)
mptcp_event_pm_listener(ssk, MPTCP_EVENT_LISTENER_CREATED);
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index c2317919fc14..d263091659e0 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -620,6 +620,18 @@ static bool mptcp_check_data_fin(struct sock *sk)
return ret;
}
+static void mptcp_dss_corruption(struct mptcp_sock *msk, struct sock *ssk)
+{
+ if (READ_ONCE(msk->allow_infinite_fallback)) {
+ MPTCP_INC_STATS(sock_net(ssk),
+ MPTCP_MIB_DSSCORRUPTIONFALLBACK);
+ mptcp_do_fallback(ssk);
+ } else {
+ MPTCP_INC_STATS(sock_net(ssk), MPTCP_MIB_DSSCORRUPTIONRESET);
+ mptcp_subflow_reset(ssk);
+ }
+}
+
static bool __mptcp_move_skbs_from_subflow(struct mptcp_sock *msk,
struct sock *ssk,
unsigned int *bytes)
@@ -692,10 +704,16 @@ static bool __mptcp_move_skbs_from_subflow(struct mptcp_sock *msk,
moved += len;
seq += len;
- if (WARN_ON_ONCE(map_remaining < len))
- break;
+ if (unlikely(map_remaining < len)) {
+ DEBUG_NET_WARN_ON_ONCE(1);
+ mptcp_dss_corruption(msk, ssk);
+ }
} else {
- WARN_ON_ONCE(!fin);
+ if (unlikely(!fin)) {
+ DEBUG_NET_WARN_ON_ONCE(1);
+ mptcp_dss_corruption(msk, ssk);
+ }
+
sk_eat_skb(ssk, skb);
done = true;
}
@@ -2846,8 +2864,10 @@ static int mptcp_init_sock(struct sock *sk)
if (unlikely(!net->mib.mptcp_statistics) && !mptcp_mib_alloc(net))
return -ENOMEM;
+ rcu_read_lock();
ret = mptcp_init_sched(mptcp_sk(sk),
mptcp_sched_find(mptcp_get_scheduler(net)));
+ rcu_read_unlock();
if (ret)
return ret;
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index 74417aae08d0..568a72702b08 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -535,6 +535,7 @@ struct mptcp_subflow_context {
__unused : 8;
bool data_avail;
bool scheduled;
+ bool pm_listener; /* a listener managed by the kernel PM? */
u32 remote_nonce;
u64 thmac;
u32 local_nonce;
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 1040b3b9696b..6170f2fff71e 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -132,6 +132,13 @@ static void subflow_add_reset_reason(struct sk_buff *skb, u8 reason)
}
}
+static int subflow_reset_req_endp(struct request_sock *req, struct sk_buff *skb)
+{
+ SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_MPCAPABLEENDPATTEMPT);
+ subflow_add_reset_reason(skb, MPTCP_RST_EPROHIBIT);
+ return -EPERM;
+}
+
/* Init mptcp request socket.
*
* Returns an error code if a JOIN has failed and a TCP reset
@@ -165,6 +172,8 @@ static int subflow_check_req(struct request_sock *req,
if (opt_mp_capable) {
SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_MPCAPABLEPASSIVE);
+ if (unlikely(listener->pm_listener))
+ return subflow_reset_req_endp(req, skb);
if (opt_mp_join)
return 0;
} else if (opt_mp_join) {
@@ -172,6 +181,8 @@ static int subflow_check_req(struct request_sock *req,
if (mp_opt.backup)
SUBFLOW_REQ_INC_STATS(req, MPTCP_MIB_JOINSYNBACKUPRX);
+ } else if (unlikely(listener->pm_listener)) {
+ return subflow_reset_req_endp(req, skb);
}
if (opt_mp_capable && listener->request_mptcp) {
@@ -975,8 +986,10 @@ static bool skb_is_fully_mapped(struct sock *ssk, struct sk_buff *skb)
unsigned int skb_consumed;
skb_consumed = tcp_sk(ssk)->copied_seq - TCP_SKB_CB(skb)->seq;
- if (WARN_ON_ONCE(skb_consumed >= skb->len))
+ if (unlikely(skb_consumed >= skb->len)) {
+ DEBUG_NET_WARN_ON_ONCE(1);
return true;
+ }
return skb->len - skb_consumed <= subflow->map_data_len -
mptcp_subflow_get_map_offset(subflow);
@@ -1280,7 +1293,7 @@ static bool subflow_can_fallback(struct mptcp_subflow_context *subflow)
else if (READ_ONCE(msk->csum_enabled))
return !subflow->valid_csum_seen;
else
- return !subflow->fully_established;
+ return READ_ONCE(msk->allow_infinite_fallback);
}
static void mptcp_subflow_fail(struct mptcp_sock *msk, struct sock *ssk)
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-13 08:44:59 +0100