From: Tomas Henzl <thenzl@redhat.com>
Date: Thu, 2 Feb 2023 17:24:51 +0100
Subject: [PATCH] scsi: ses: Fix slab-out-of-bounds in ses_intf_remove()
References: bsc#1012628
Patch-mainline: 6.2.3
Git-commit: 578797f0c8cbc2e3ec5fc0dab87087b4c7073686

commit 578797f0c8cbc2e3ec5fc0dab87087b4c7073686 upstream.

A fix for:

BUG: KASAN: slab-out-of-bounds in ses_intf_remove+0x23f/0x270 [ses]
Read of size 8 at addr ffff88a10d32e5d8 by task rmmod/12013

When edev->components is zero, accessing edev->component[0] members is
wrong.

Link: https://lore.kernel.org/r/20230202162451.15346-5-thenzl@redhat.com
Cc: stable@vger.kernel.org
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/scsi/ses.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c
index 77f4322e..1707d6d1 100644
--- a/drivers/scsi/ses.c
+++ b/drivers/scsi/ses.c
@@ -856,7 +856,8 @@ static void ses_intf_remove_enclosure(struct scsi_device *sdev)
 	kfree(ses_dev->page2);
 	kfree(ses_dev);
 
-	kfree(edev->component[0].scratch);
+	if (edev->components)
+		kfree(edev->component[0].scratch);
 
 	put_device(&edev->edev);
 	enclosure_unregister(edev);
-- 
2.35.3