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>

diff --git a/fs/squashfs/sqfs.c b/fs/squashfs/sqfs.c
index 547d2fd4b3025d251232d27858238bc8fea0a584..90bf32ca0ae5594337b766ae4fbde1f599e07511 100644 (file)
--- 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;
        }