[PATCH 6.1 158/185] dlm: use kernel_connect() and kernel_bind()

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6.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jordan Rife <jrife@xxxxxxxxxx>

[ Upstream commit e9cdebbe23f1aa9a1caea169862f479ab3fa2773 ]

Recent changes to kernel_connect() and kernel_bind() ensure that
callers are insulated from changes to the address parameter made by BPF
SOCK_ADDR hooks. This patch wraps direct calls to ops->connect() and
ops->bind() with kernel_connect() and kernel_bind() to protect callers
in such cases.

Link: https://lore.kernel.org/netdev/9944248dba1bce861375fcce9de663934d933ba9.camel@xxxxxxxxxx/
Fixes: d74bad4e74ee ("bpf: Hooks for sys_connect")
Fixes: 4fbac77d2d09 ("bpf: Hooks for sys_bind")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Jordan Rife <jrife@xxxxxxxxxx>
Signed-off-by: David Teigland <teigland@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 fs/dlm/lowcomms.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 6ed09edabea0..72f34f96d015 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1845,8 +1845,8 @@ static int dlm_tcp_bind(struct socket *sock)
 	memcpy(&src_addr, dlm_local_addr[0], sizeof(src_addr));
 	make_sockaddr(&src_addr, 0, &addr_len);
 
-	result = sock->ops->bind(sock, (struct sockaddr *)&src_addr,
-				 addr_len);
+	result = kernel_bind(sock, (struct sockaddr *)&src_addr,
+			     addr_len);
 	if (result < 0) {
 		/* This *may* not indicate a critical error */
 		log_print("could not bind for connect: %d", result);
@@ -1860,7 +1860,7 @@ static int dlm_tcp_connect(struct connection *con, struct socket *sock,
 {
 	int ret;
 
-	ret = sock->ops->connect(sock, addr, addr_len, O_NONBLOCK);
+	ret = kernel_connect(sock, addr, addr_len, O_NONBLOCK);
 	switch (ret) {
 	case -EINPROGRESS:
 		fallthrough;
@@ -1900,8 +1900,8 @@ static int dlm_tcp_listen_bind(struct socket *sock)
 
 	/* Bind to our port */
 	make_sockaddr(dlm_local_addr[0], dlm_config.ci_tcp_port, &addr_len);
-	return sock->ops->bind(sock, (struct sockaddr *)dlm_local_addr[0],
-			       addr_len);
+	return kernel_bind(sock, (struct sockaddr *)&dlm_local_addr[0],
+			   addr_len);
 }
 
 static const struct dlm_proto_ops dlm_tcp_ops = {
@@ -1928,12 +1928,12 @@ static int dlm_sctp_connect(struct connection *con, struct socket *sock,
 	int ret;
 
 	/*
-	 * Make sock->ops->connect() function return in specified time,
+	 * Make kernel_connect() function return in specified time,
 	 * since O_NONBLOCK argument in connect() function does not work here,
 	 * then, we should restore the default value of this attribute.
 	 */
 	sock_set_sndtimeo(sock->sk, 5);
-	ret = sock->ops->connect(sock, addr, addr_len, 0);
+	ret = kernel_connect(sock, addr, addr_len, 0);
 	sock_set_sndtimeo(sock->sk, 0);
 	if (ret < 0)
 		return ret;
-- 
2.43.0







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