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Commit 630faf81 authored by Al Viro's avatar Al Viro
Browse files

cgroup: don't put ERR_PTR() into fc->root 



the caller of ->get_tree() expects NULL left there on error...

Reported-by: default avatarThibaut Sautereau <thibaut@sautereau.fr>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 03ad0d70

kernel/cgroup/cgroup.c

+3 −2
Original line number Diff line number Diff line
@@ -2119,11 +2119,12 @@ int cgroup_do_get_tree(struct fs_context *fc) 


		nsdentry = kernfs_node_dentry(cgrp->kn, sb);

		dput(fc->root);

		fc->root = nsdentry;

		if (IS_ERR(nsdentry)) {

			ret = PTR_ERR(nsdentry);

			deactivate_locked_super(sb);

			ret = PTR_ERR(nsdentry);

			nsdentry = NULL;

		}

		fc->root = nsdentry;

	}



	if (!ctx->kfc.new_sb_created)