linux-kernel - [PATCH v2] scsi: libiscsi: move init ehwait to iscsi_session

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Message-Id: <20210911135159.20543-1-dinghui@sangfor.com.cn>
Date:   Sat, 11 Sep 2021 21:51:59 +0800
From:   Ding Hui <dinghui@...gfor.com.cn>
To:     lduncan@...e.com, cleech@...hat.com, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, michael.christie@...cle.com,
        open-iscsi@...glegroups.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Ding Hui <dinghui@...gfor.com.cn>
Subject: [PATCH v2] scsi: libiscsi: move init ehwait to iscsi_session_setup()

The 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().

Although a session can only have 1 conn currently, it is better to
do init ehwait in iscsi_session_setup() to prevent reinit by mistake,
also in case we can handle multiple conns in the future.

Fixes: ec29d0ac29be ("scsi: iscsi: Fix conn use after free during resets")
Signed-off-by: Ding Hui <dinghui@...gfor.com.cn>
---
v2:
  update commit log
 
 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:
-- 
2.17.1