From 6dc618cdd6b896791313926becb1f86ede0e046a Mon Sep 17 00:00:00 2001
From: Elena Reshetova <elena.reshetova@intel.com>
Date: Thu, 9 Mar 2017 13:46:58 +0200
Subject: scsi: libiscsi: qedi: convert iscsi_task.refcount from atomic_t to
 refcount_t

refcount_t type and corresponding API should be used instead of atomic_t
when the variable is used as a reference counter. This allows to avoid
accidental refcounter overflows that might lead to use-after-free
situations.

Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Acked-by: Chris Leech <cleech@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 include/scsi/libiscsi.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'include/scsi/libiscsi.h')

diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index b0e275de6dec..24d74b5bcb24 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -29,6 +29,7 @@
 #include <linux/timer.h>
 #include <linux/workqueue.h>
 #include <linux/kfifo.h>
+#include <linux/refcount.h>
 #include <scsi/iscsi_proto.h>
 #include <scsi/iscsi_if.h>
 #include <scsi/scsi_transport_iscsi.h>
@@ -139,7 +140,7 @@ struct iscsi_task {
 
 	/* state set/tested under session->lock */
 	int			state;
-	atomic_t		refcount;
+	refcount_t		refcount;
 	struct list_head	running;	/* running cmd list */
 	void			*dd_data;	/* driver/transport data */
 };
-- 
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