cifsd: fix wrong use of rw semaphore in __session_create()

Adding list to session table should be protected by
down_write/up_write().

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/cifsd/mgmt/user_session.c b/fs/cifsd/mgmt/user_session.c
index afcdf76..1b71a20 100644 (file)
--- a/fs/cifsd/mgmt/user_session.c
+++ b/fs/cifsd/mgmt/user_session.c
@@ -298,9 +298,9 @@ static struct ksmbd_session *__session_create(int protocol)
                goto error;
 
        if (protocol == CIFDS_SESSION_FLAG_SMB2) {
-               down_read(&sessions_table_lock);
+               down_write(&sessions_table_lock);
                hash_add(sessions_table, &sess->hlist, sess->id);
-               up_read(&sessions_table_lock);
+               up_write(&sessions_table_lock);
        }
        return sess;