5.4-stable review patch. If anyone has any objections, please let me know.
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From: Jordan Rife jrife@google.com
commit 7563cf17dce0a875ba3d872acdc63a78ea344019 upstream.
Direct calls to ops->connect() can overwrite the address parameter when used in conjunction with BPF SOCK_ADDR hooks. Recent changes to kernel_connect() ensure that callers are insulated from such side effects. This patch wraps the direct call to ops->connect() with kernel_connect() to prevent unexpected changes to the address passed to ceph_tcp_connect().
This change was originally part of a larger patch targeting the net tree addressing all instances of unprotected calls to ops->connect() throughout the kernel, but this change was split up into several patches targeting various trees.
Cc: stable@vger.kernel.org Link: https://lore.kernel.org/netdev/20230821100007.559638-1-jrife@google.com/ Link: https://lore.kernel.org/netdev/9944248dba1bce861375fcce9de663934d933ba9.came... Fixes: d74bad4e74ee ("bpf: Hooks for sys_connect") Signed-off-by: Jordan Rife jrife@google.com Reviewed-by: Ilya Dryomov idryomov@gmail.com Signed-off-by: Ilya Dryomov idryomov@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/ceph/messenger.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -477,8 +477,8 @@ static int ceph_tcp_connect(struct ceph_ dout("connect %s\n", ceph_pr_addr(&con->peer_addr));
con_sock_state_connecting(con); - ret = sock->ops->connect(sock, (struct sockaddr *)&ss, sizeof(ss), - O_NONBLOCK); + ret = kernel_connect(sock, (struct sockaddr *)&ss, sizeof(ss), + O_NONBLOCK); if (ret == -EINPROGRESS) { dout("connect %s EINPROGRESS sk_state = %u\n", ceph_pr_addr(&con->peer_addr),