On 9/9/21 8:02 PM, Ding Hui wrote:
> commit ec29d0ac29be ("scsi: iscsi: Fix conn use after free during
> resets") move member ehwait from conn to session, but left init ehwait
> in iscsi_conn_setup().
>
> Due to one session can be binded by multi conns, the conn after the
A session can only have 1 conn. There is some code that makes it look
like we can do multiple conns or swap the single conn, but it was never
fully implemented/supported upstream.
However, I like the patch. The init should be done in iscsi_session_setup,
so could you fix up the commit, so it's correct?
> first will reinit the session->ehwait, move init ehwait to
> iscsi_session_setup() to fix it.
>
> Fixes: ec29d0ac29be ("scsi: iscsi: Fix conn use after free during resets")
> Signed-off-by: Ding Hui <dinghui@xxxxxxxxxxxxxx>
> ---
> drivers/scsi/libiscsi.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
> index 4683c183e9d4..712a45368385 100644
> --- a/drivers/scsi/libiscsi.c
> +++ b/drivers/scsi/libiscsi.c
> @@ -2947,6 +2947,7 @@ iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost,
> session->tmf_state = TMF_INITIAL;
> timer_setup(&session->tmf_timer, iscsi_tmf_timedout, 0);
> mutex_init(&session->eh_mutex);
> + init_waitqueue_head(&session->ehwait);
>
> spin_lock_init(&session->frwd_lock);
> spin_lock_init(&session->back_lock);
> @@ -3074,8 +3075,6 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size,
> goto login_task_data_alloc_fail;
> conn->login_task->data = conn->data = data;
>
> - init_waitqueue_head(&session->ehwait);
> -
> return cls_conn;
>
> login_task_data_alloc_fail:
>
