fs/squashfs: zero out unused fields in fs_dirent

When reading directories the UEFI sub-system must supply file attributes
and timestamps. These fields will have to be added to struct fs_dirent.
SquashFS should not fill these fields with random data. Ensure that they
are zeroed out.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>

fs/squashfs/sqfs.c

@@ -876,7 +876,7 @@ int sqfs_opendir(const char *filename, struct fs_dir_stream **dirsp)
 	char **token_list = NULL, *path = NULL;
 	u32 *pos_list = NULL;
 
-	dirs = malloc(sizeof(*dirs));
+	dirs = calloc(1, sizeof(*dirs));
 	if (!dirs)
 		return -EINVAL;