Bluetooth: cmtp: fix information leak to userland

Structure cmtp_conninfo is copied to userland with some padding fields
unitialized.  It leads to leaking of contents of kernel stack memory.

Signed-off-by: Vasiliy Kulikov <[email protected]>
Acked-by: Marcel Holtmann <[email protected]>
Signed-off-by: Gustavo F. Padovan <[email protected]>

diff --git a/net/bluetooth/cmtp/core.c b/net/bluetooth/cmtp/core.c
index ec0a1347f933cbdb9ca70be4f869d459f0ec9565..8e5f292529accd5784482c72a2090816a1ab7df6 100644 (file)
--- a/net/bluetooth/cmtp/core.c
+++ b/net/bluetooth/cmtp/core.c
@@ -78,6 +78,7 @@ static void __cmtp_unlink_session(struct cmtp_session *session)
 
 static void __cmtp_copy_session(struct cmtp_session *session, struct cmtp_conninfo *ci)
 {
+       memset(ci, 0, sizeof(*ci));
        bacpy(&ci->bdaddr, &session->bdaddr);
 
        ci->flags = session->flags;