From: Charles Manning <cdhmanning@gmail.com>
Date: Thu, 8 Dec 2022 21:27:12 +0000 (+1300)
Subject: yaffsfs.c: Fix NULL dereference in yaffs_unmount2_reldev()
X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=commitdiff_plain;h=HEAD;hp=-c

yaffsfs.c: Fix NULL dereference in yaffs_unmount2_reldev()

Signed-off-by: Charles Manning <cdhmanning@gmail.com>
---

613a901a229e8a701c18f003dd0aee18453e0670
diff --git a/direct/yaffsfs.c b/direct/yaffsfs.c
index 2c1ac42..823f7ed 100644
--- a/direct/yaffsfs.c
+++ b/direct/yaffsfs.c
@@ -3110,14 +3110,17 @@ int yaffs_unmount2_common(struct yaffs_dev *dev, const YCHAR *path, int force)
 {
 	int retVal = -1;
 
-	if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
-		yaffsfs_SetError(-EFAULT);
-		return -1;
-	}
 
-	if (yaffsfs_CheckPath(path) < 0) {
-		yaffsfs_SetError(-ENAMETOOLONG);
-		return -1;
+	if (!dev) {
+		if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
+			yaffsfs_SetError(-EFAULT);
+			return -1;
+		}
+
+		if (yaffsfs_CheckPath(path) < 0) {
+			yaffsfs_SetError(-ENAMETOOLONG);
+			return -1;
+		}
 	}
 
 	yaffsfs_Lock();