This is a note to let you know that I've just added the patch titled
mptcp: drop unused sk in mptcp_get_options
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mptcp-drop-unused-sk-in-mptcp_get_options.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a315cfe48b1b5f1b186a6cf7be60a027da3816e8
Author: Geliang Tang <geliang.tang@xxxxxxxxx>
Date: Tue Feb 15 18:11:25 2022 -0800
mptcp: drop unused sk in mptcp_get_options
[ Upstream commit 0799e21b5a76d9f14d8a8f024d0b6b9847ad1a03 ]
The parameter 'sk' became useless since the code using it was dropped
from mptcp_get_options() in the commit 8d548ea1dd15 ("mptcp: do not set
unconditionally csum_reqd on incoming opt"). Let's drop it.
Signed-off-by: Geliang Tang <geliang.tang@xxxxxxxx>
Signed-off-by: Matthieu Baerts <matthieu.baerts@xxxxxxxxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Stable-dep-of: c1665273bdc7 ("mptcp: strict validation before using mp_opt->hmac")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index c7d6997b31c8..3b4ce8a06f99 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -354,8 +354,7 @@ static void mptcp_parse_option(const struct sk_buff *skb,
}
}
-void mptcp_get_options(const struct sock *sk,
- const struct sk_buff *skb,
+void mptcp_get_options(const struct sk_buff *skb,
struct mptcp_options_received *mp_opt)
{
const struct tcphdr *th = tcp_hdr(skb);
@@ -1091,7 +1090,7 @@ bool mptcp_incoming_options(struct sock *sk, struct sk_buff *skb)
return true;
}
- mptcp_get_options(sk, skb, &mp_opt);
+ mptcp_get_options(skb, &mp_opt);
/* The subflow can be in close state only if check_fully_established()
* just sent a reset. If so, tell the caller to ignore the current packet.
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index e193b710b471..78aa6125eafb 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -636,8 +636,7 @@ int __init mptcp_proto_v6_init(void);
struct sock *mptcp_sk_clone(const struct sock *sk,
const struct mptcp_options_received *mp_opt,
struct request_sock *req);
-void mptcp_get_options(const struct sock *sk,
- const struct sk_buff *skb,
+void mptcp_get_options(const struct sk_buff *skb,
struct mptcp_options_received *mp_opt);
void mptcp_finish_connect(struct sock *sk);
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 666f6720db76..a1349c6eda46 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -152,7 +152,7 @@ static int subflow_check_req(struct request_sock *req,
return -EINVAL;
#endif
- mptcp_get_options(sk_listener, skb, &mp_opt);
+ mptcp_get_options(skb, &mp_opt);
opt_mp_capable = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPC);
opt_mp_join = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPJ);
@@ -249,7 +249,7 @@ int mptcp_subflow_init_cookie_req(struct request_sock *req,
int err;
subflow_init_req(req, sk_listener);
- mptcp_get_options(sk_listener, skb, &mp_opt);
+ mptcp_get_options(skb, &mp_opt);
opt_mp_capable = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPC);
opt_mp_join = !!(mp_opt.suboptions & OPTIONS_MPTCP_MPJ);
@@ -407,7 +407,7 @@ static void subflow_finish_connect(struct sock *sk, const struct sk_buff *skb)
subflow->ssn_offset = TCP_SKB_CB(skb)->seq;
pr_debug("subflow=%p synack seq=%x", subflow, subflow->ssn_offset);
- mptcp_get_options(sk, skb, &mp_opt);
+ mptcp_get_options(skb, &mp_opt);
if (subflow->request_mptcp) {
if (!(mp_opt.suboptions & OPTIONS_MPTCP_MPC)) {
MPTCP_INC_STATS(sock_net(sk),
@@ -687,7 +687,7 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk,
* reordered MPC will cause fallback, but we don't have other
* options.
*/
- mptcp_get_options(sk, skb, &mp_opt);
+ mptcp_get_options(skb, &mp_opt);
if (!(mp_opt.suboptions & OPTIONS_MPTCP_MPC)) {
fallback = true;
goto create_child;
@@ -697,7 +697,7 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk,
if (!new_msk)
fallback = true;
} else if (subflow_req->mp_join) {
- mptcp_get_options(sk, skb, &mp_opt);
+ mptcp_get_options(skb, &mp_opt);
if (!(mp_opt.suboptions & OPTIONS_MPTCP_MPJ) ||
!subflow_hmac_valid(req, &mp_opt) ||
!mptcp_can_accept_new_subflow(subflow_req->msk)) {
