From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tejun Heo Subject: [PATCH 4.9 03/93] cgroup: fix error return value from cgroup_subtree_control() Date: Wed, 9 Aug 2017 11:12:56 -0700 Message-Id: <20170809181335.792468316@linuxfoundation.org> In-Reply-To: <20170809181335.658857427@linuxfoundation.org> References: <20170809181335.658857427@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tejun Heo commit 3c74541777302eec43a0d1327c4d58b8659a776b upstream. While refactoring, f7b2814bb9b6 ("cgroup: factor out cgroup_{apply|finalize}_control() from cgroup_subtree_control_write()") broke error return value from the function. The return value from the last operation is always overridden to zero. Fix it. Signed-off-by: Tejun Heo Signed-off-by: Tejun Heo Signed-off-by: Greg Kroah-Hartman --- kernel/cgroup.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -3487,11 +3487,11 @@ static ssize_t cgroup_subtree_control_wr cgrp->subtree_control &= ~disable; ret = cgroup_apply_control(cgrp); - cgroup_finalize_control(cgrp, ret); + if (ret) + goto out_unlock; kernfs_activate(cgrp->kn); - ret = 0; out_unlock: cgroup_kn_unlock(of->kn); return ret ?: nbytes;