From: Alan Stern <stern@rowland.harvard.edu>
Date: Fri, 16 Sep 2005 01:52:51 +0000 (-0400)
Subject: [SCSI] fix use after potential free in scsi_remove_device
X-Git-Tag: firefly_0821_release~41044^2~16
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=541950027f8b7c96a639bc16e48930c590f1b98a;p=firefly-linux-kernel-4.4.55.git

[SCSI] fix use after potential free in scsi_remove_device

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---

diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index b8052d5206cc..83f87c41b18d 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -707,9 +707,11 @@ void __scsi_remove_device(struct scsi_device *sdev)
  **/
 void scsi_remove_device(struct scsi_device *sdev)
 {
-	down(&sdev->host->scan_mutex);
+	struct Scsi_Host *shost = sdev->host;
+
+	down(&shost->scan_mutex);
 	__scsi_remove_device(sdev);
-	up(&sdev->host->scan_mutex);
+	up(&shost->scan_mutex);
 }
 EXPORT_SYMBOL(scsi_remove_device);