default.nix

{ lib, pkgs, ... }:

{
  boot.kernelPatches = lib.singleton {
    name = "revert-overlayfs-regression";
    patch = pkgs.writeText "revert-overlayfs-regression.patch" ''
      diff --git a/fs/open.c b/fs/open.c
      index 0285ce7dbd51..46b55e184c96 100644
      --- a/fs/open.c
      +++ b/fs/open.c
      @@ -876,8 +876,13 @@ EXPORT_SYMBOL(file_path);
        */
       int vfs_open(const struct path *path, struct file *file)
       {
      +	struct dentry *dentry = d_real(path->dentry, NULL);
      +
      +	if (IS_ERR(dentry))
      +		return PTR_ERR(dentry);
      +
       	file->f_path = *path;
      -	return do_dentry_open(file, d_backing_inode(path->dentry), NULL);
      +	return do_dentry_open(file, d_backing_inode(dentry), NULL);
       }
      ${" "}
       struct file *dentry_open(const struct path *path, int flags,
    '';
  };
}