From 1017435ca9681236b6c993202a75b7b44d45d1ea Mon Sep 17 00:00:00 2001
From: sallyjunjun <72725839+sallyjunjun@users.noreply.github.com>
Date: Wed, 15 Jun 2022 10:14:36 +0800
Subject: [PATCH] Fix segmentation fault problem.

When execute iscsi_task_mgmt_lun_reset_async function,
pdus are already removed from waitpdu list. In iscsi_service
function, this will call iscsi_process_pdu and release
pdu from waitpdu again, which cause segmentation fault.

Whether waitpud list is NULL should be checked here to avoid
the problem.

Signed-off-by: geruijun <geruijun@huawei.com>
---
 lib/pdu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/pdu.c b/lib/pdu.c
index 6fe70db..f9c0bc5 100644
--- a/lib/pdu.c
+++ b/lib/pdu.c
@@ -622,7 +622,7 @@ iscsi_process_pdu(struct iscsi_context *iscsi, struct iscsi_in_pdu *in)
 			return -1;
 		}
 
-		if (is_finished) {
+		if (is_finished && iscsi->waitpdu != NULL) {
 			ISCSI_LIST_REMOVE(&iscsi->waitpdu, pdu);
 			iscsi->drv->free_pdu(iscsi, pdu);
 		}