4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: xingaopeng xingaopeng@huawei.com
commit e5f5b717983bccfa033282e9886811635602510e upstream.
We need to initialize opts.s_mount_opt as zero before using it, else we may get some unexpected mount options.
Fixes: 088519572ca8 ("ext2: Parse mount options into a dedicated structure") CC: stable@vger.kernel.org Signed-off-by: xingaopeng xingaopeng@huawei.com Signed-off-by: Jan Kara jack@suse.cz Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/ext2/super.c | 1 + 1 file changed, 1 insertion(+)
--- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -895,6 +895,7 @@ static int ext2_fill_super(struct super_ if (sb->s_magic != EXT2_SUPER_MAGIC) goto cantfind_ext2;
+ opts.s_mount_opt = 0; /* Set defaults before we parse the mount options */ def_mount_opts = le32_to_cpu(es->s_default_mount_opts); if (def_mount_opts & EXT2_DEFM_DEBUG)