Re: [syzbot] kernel BUG in create_default_group...

[Edward Adam Davis]

From: Edward Aadm Davis <eadavis@xxxxxxxx>

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 58161ead29e5

diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index eda80c2a2d38..edc5a7419ad9 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -1605,6 +1605,9 @@ static int configfs_dir_open(struct inode *inode, struct file *file)
 	struct configfs_dirent * parent_sd = dentry->d_fsdata;
 	int err;
 
+	if (!configfs_dirent_is_ready(parent_sd))
+		return -EAGAIN;
+
 	inode_lock(d_inode(dentry));
 	/*
 	 * Fake invisibility if dir belongs to a group/default groups hierarchy