target:fix null pointer judge in core_tmr_drain_tmr_list
diff mbox

Message ID 20170816083900.4964-1-tang.wenji@zte.com.cn
State New, archived
Headers show

Commit Message

tang.wenji@zte.com.cn Aug. 16, 2017, 8:39 a.m. UTC
From: tangwenji <tang.wenji@zte.com.cn>

The target system kernel crash when the initiator executes the sg_persist -A command,because of the second argument to be set to NULL when core_tmr_lun_reset is called in core_scsi3_pro_preempt function.

Signed-off-by: tangwenji <tang.wenji@zte.com.cn>
---
 drivers/target/target_core_tmr.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Patch
diff mbox

diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c
index e22847bd79b9..61909b23e959 100644
--- a/drivers/target/target_core_tmr.c
+++ b/drivers/target/target_core_tmr.c
@@ -217,7 +217,8 @@  static void core_tmr_drain_tmr_list(
 	 * LUN_RESET tmr..
 	 */
 	spin_lock_irqsave(&dev->se_tmr_lock, flags);
-	list_del_init(&tmr->tmr_list);
+	if (tmr)
+		list_del_init(&tmr->tmr_list);
 	list_for_each_entry_safe(tmr_p, tmr_pp, &dev->dev_tmr_list, tmr_list) {
 		cmd = tmr_p->task_cmd;
 		if (!cmd) {