From 84378d5c86d1b8e7afd2132e2c8d79d8e7e1f7d9 Mon Sep 17 00:00:00 2001
From: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Date: Tue, 10 May 2022 21:53:25 +0200
Subject: [PATCH] fs/squashfs: fix sqfs_read_sblk()

Setting sblk = NULL has no effect on the caller.
We want to set *sblk = NULL if an error occurrs to avoid usage after free.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
---
 fs/squashfs/sqfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/squashfs/sqfs.c b/fs/squashfs/sqfs.c
index 547d2fd4b3..90bf32ca0a 100644
--- a/fs/squashfs/sqfs.c
+++ b/fs/squashfs/sqfs.c
@@ -49,7 +49,7 @@ static int sqfs_read_sblk(struct squashfs_super_block **sblk)
 
 	if (sqfs_disk_read(0, 1, *sblk) != 1) {
 		free(*sblk);
-		sblk = NULL;
+		*sblk = NULL;
 		return -EINVAL;
 	}
 
-- 
2.39.5