From: Mike Christie <michael.christie@oracle.com>
To: lduncan@suse.com, cleech@redhat.com, njavali@marvell.com,
mrangankar@marvell.com, GR-QLogic-Storage-Upstream@marvell.com,
martin.petersen@oracle.com, linux-scsi@vger.kernel.org,
jejb@linux.ibm.com
Cc: Mike Christie <michael.christie@oracle.com>
Subject: [PATCH v2 11/28] scsi: iscsi: Have abort handler get ref to conn
Date: Tue, 25 May 2021 13:18:04 -0500 [thread overview]
Message-ID: <20210525181821.7617-12-michael.christie@oracle.com> (raw)
In-Reply-To: <20210525181821.7617-1-michael.christie@oracle.com>
If scsi-ml is aborting a task when we are tearing down the conn we could
free the conn while the abort thread is accessing the conn. This has the
abort handler get a ref to the conn so it won't be freed from under it.
Note: this is not needed for device/target reset because we are holding
the eh_mutex when accessing the conn.
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
---
drivers/scsi/libiscsi.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index ab39d7f65bbb..6ca3d35a3d11 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -2285,6 +2285,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
}
conn = session->leadconn;
+ iscsi_get_conn(conn->cls_conn);
conn->eh_abort_cnt++;
age = session->age;
@@ -2295,9 +2296,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
ISCSI_DBG_EH(session, "sc completed while abort in progress\n");
spin_unlock(&session->back_lock);
- spin_unlock_bh(&session->frwd_lock);
- mutex_unlock(&session->eh_mutex);
- return SUCCESS;
+ goto success;
}
ISCSI_DBG_EH(session, "aborting [sc %p itt 0x%x]\n", sc, task->itt);
__iscsi_get_task(task);
@@ -2364,6 +2363,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
ISCSI_DBG_EH(session, "abort success [sc %p itt 0x%x]\n",
sc, task->itt);
iscsi_put_task(task);
+ iscsi_put_conn(conn->cls_conn);
mutex_unlock(&session->eh_mutex);
return SUCCESS;
@@ -2373,6 +2373,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
ISCSI_DBG_EH(session, "abort failed [sc %p itt 0x%x]\n", sc,
task ? task->itt : 0);
iscsi_put_task(task);
+ iscsi_put_conn(conn->cls_conn);
mutex_unlock(&session->eh_mutex);
return FAILED;
}
--
2.25.1
next prev parent reply other threads:[~2021-05-25 18:19 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-25 18:17 iSCSI error handler fixes v2 Mike Christie
2021-05-25 18:17 ` [PATCH v2 01/28] scsi: iscsi: Add task completion helper Mike Christie
2021-06-08 3:05 ` Martin K. Petersen
2021-05-25 18:17 ` [PATCH v2 02/28] scsi: iscsi: Stop queueing during ep_disconnect Mike Christie
2021-05-25 18:17 ` [PATCH v2 03/28] scsi: iscsi: Drop suspend calls from ep_disconnect Mike Christie
2021-05-25 18:17 ` [PATCH v2 04/28] scsi: iscsi: Force immediate failure during shutdown Mike Christie
2021-05-25 18:17 ` [PATCH v2 05/28] scsi: iscsi: Use system_unbound_wq for destroy_work Mike Christie
2021-05-25 18:17 ` [PATCH v2 06/28] scsi: iscsi: Rel ref after iscsi_lookup_endpoint Mike Christie
2021-05-25 18:18 ` [PATCH v2 07/28] scsi: iscsi: Fix in-kernel conn failure handling Mike Christie
2021-05-25 18:18 ` [PATCH v2 08/28] scsi: iscsi_tcp: Set no linger Mike Christie
2021-05-25 18:18 ` [PATCH v2 09/28] scsi: iscsi_tcp: Start socket shutdown during conn stop Mike Christie
2021-05-25 18:18 ` [PATCH v2 10/28] scsi: iscsi: Add iscsi_cls_conn refcount helpers Mike Christie
2021-05-25 18:18 ` Mike Christie [this message]
2021-05-25 18:18 ` [PATCH v2 12/28] scsi: iscsi: Get ref to conn during reset handling Mike Christie
2021-05-25 18:18 ` [PATCH v2 13/28] scsi: iscsi: Fix conn use after free during resets Mike Christie
2021-05-25 18:18 ` [PATCH v2 14/28] scsi: iscsi: Fix shost->max_id use Mike Christie
2021-05-25 18:18 ` [PATCH v2 15/28] scsi: iscsi: Fix completion check during abort races Mike Christie
2021-05-25 18:18 ` [PATCH v2 16/28] scsi: iscsi: Flush block work before unblock Mike Christie
2021-05-25 18:18 ` [PATCH v2 17/28] scsi: iscsi: Hold task ref during TMF timeout handling Mike Christie
2021-05-25 18:18 ` [PATCH v2 18/28] scsi: iscsi: Move pool freeing Mike Christie
2021-05-25 18:18 ` [PATCH v2 19/28] scsi: qedi: Fix null ref during abort handling Mike Christie
2021-05-25 18:18 ` [PATCH v2 20/28] scsi: qedi: Fix race during abort timeouts Mike Christie
2021-05-25 18:18 ` [PATCH v2 21/28] scsi: qedi: Fix use after free during abort cleanup Mike Christie
2021-05-25 18:18 ` [PATCH v2 22/28] scsi: qedi: Fix TMF tid allocation Mike Christie
2021-05-25 18:18 ` [PATCH v2 23/28] scsi: qedi: Use GFP_NOIO for TMF allocation Mike Christie
2021-05-25 18:18 ` [PATCH v2 24/28] scsi: qedi: Fix TMF session block/unblock use Mike Christie
2021-05-25 18:18 ` [PATCH v2 25/28] scsi: qedi: Fix cleanup " Mike Christie
2021-05-25 18:18 ` [PATCH v2 26/28] scsi: qedi: Pass send_iscsi_tmf task to abort Mike Christie
2021-05-25 18:18 ` [PATCH v2 27/28] scsi: qedi: Complete TMF works before disconnect Mike Christie
2021-05-25 18:18 ` [PATCH v2 28/28] scsi: qedi: Wake up if cmd_cleanup_req is set Mike Christie
2021-06-02 5:28 ` iSCSI error handler fixes v2 Martin K. Petersen
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