ceph: d_alloc_root() may fail (3c5184ef) · Commits · e / devices / android_kernel_fairphone_FP5

fs/ceph/super.c

+11 −4

Original line number	Diff line number	Diff line
		@@ -636,19 +636,26 @@ static struct dentry open_root_dentry(struct ceph_fs_client fsc,
		req->r_num_caps = 2;
		err = ceph_mdsc_do_request(mdsc, NULL, req);
		if (err == 0) {
		struct inode *inode = req->r_target_inode;
		req->r_target_inode = NULL;
		dout("open_root_inode success\n");
		if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT &&
		if (ceph_ino(inode) == CEPH_INO_ROOT &&
		fsc->sb->s_root == NULL) {
		root = d_alloc_root(req->r_target_inode);
		root = d_alloc_root(inode);
		if (!root) {
		iput(inode);
		root = ERR_PTR(-ENOMEM);
		goto out;
		}
		ceph_init_dentry(root);
		} else {
		root = d_obtain_alias(req->r_target_inode);
		root = d_obtain_alias(inode);
		}
		req->r_target_inode = NULL;
		dout("open_root_inode success, root dentry is %p\n", root);
		} else {
		root = ERR_PTR(err);
		}
		out:
		ceph_mdsc_put_request(req);
		return root;
		}