4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jordan Rife <jrife@xxxxxxxxxx>
commit 26297b4ce1ce4ea40bc9a48ec99f45da3f64d2e2 upstream.
commit 0bdf399342c5 ("net: Avoid address overwrite in kernel_connect")
ensured that kernel_connect() will not overwrite the address parameter
in cases where BPF connect hooks perform an address rewrite. This change
replaces direct calls to sock->ops->connect() in net with kernel_connect()
to make these call safe.
Link: https://lore.kernel.org/netdev/20230912013332.2048422-1-jrife@xxxxxxxxxx/
Fixes: d74bad4e74ee ("bpf: Hooks for sys_connect")
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Willem de Bruijn <willemb@xxxxxxxxxx>
Signed-off-by: Jordan Rife <jrife@xxxxxxxxxx>
Reviewed-by: Simon Horman <horms@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/netfilter/ipvs/ip_vs_sync.c | 4 ++--
net/rds/tcp_connect.c | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)
--- a/net/netfilter/ipvs/ip_vs_sync.c
+++ b/net/netfilter/ipvs/ip_vs_sync.c
@@ -1510,8 +1510,8 @@ static int make_send_sock(struct netns_i
}
get_mcast_sockaddr(&mcast_addr, &salen, &ipvs->mcfg, id);
- result = sock->ops->connect(sock, (struct sockaddr *) &mcast_addr,
- salen, 0);
+ result = kernel_connect(sock, (struct sockaddr *)&mcast_addr,
+ salen, 0);
if (result < 0) {
pr_err("Error connecting to the multicast addr\n");
goto error;
--- a/net/rds/tcp_connect.c
+++ b/net/rds/tcp_connect.c
@@ -169,7 +169,7 @@ int rds_tcp_conn_path_connect(struct rds
* own the socket
*/
rds_tcp_set_callbacks(sock, cp);
- ret = sock->ops->connect(sock, addr, addrlen, O_NONBLOCK);
+ ret = kernel_connect(sock, addr, addrlen, O_NONBLOCK);
rdsdebug("connect to address %pI6c returned %d\n", &conn->c_faddr, ret);
if (ret == -EINPROGRESS)
