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authorLinus Torvalds <torvalds@linux-foundation.org>2014-03-19 16:13:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-03-19 16:13:40 -0700
commit7c3895383fea48dab2374b04a936de4717a85a81 (patch)
treea56b03fee8d9b5387ba612b60a7380fddb14c726
parentea1cd65a648bd98ff9d028a647462d28313aadfd (diff)
parent3eb59ec64fc7a3f4576da23f811b39331b830ba2 (diff)
Merge branch 'for-3.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fix from Tejun Heo: "One really late cgroup patch to fix error path in create_css(). Hitting this bug would be pretty rare but still possible and it gets delayed we'd need to backport it through -stable anyway. It only updates error path in create_css() and has low chance of new breakages" * 'for-3.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroup: fix a failure path in create_css()
-rw-r--r--kernel/cgroup.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 105f273b6f8..0c753ddd223 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -4112,17 +4112,17 @@ static int create_css(struct cgroup *cgrp, struct cgroup_subsys *ss)
err = percpu_ref_init(&css->refcnt, css_release);
if (err)
- goto err_free;
+ goto err_free_css;
init_css(css, ss, cgrp);
err = cgroup_populate_dir(cgrp, 1 << ss->subsys_id);
if (err)
- goto err_free;
+ goto err_free_percpu_ref;
err = online_css(css);
if (err)
- goto err_free;
+ goto err_clear_dir;
dget(cgrp->dentry);
css_get(css->parent);
@@ -4138,8 +4138,11 @@ static int create_css(struct cgroup *cgrp, struct cgroup_subsys *ss)
return 0;
-err_free:
+err_clear_dir:
+ cgroup_clear_dir(css->cgroup, 1 << css->ss->subsys_id);
+err_free_percpu_ref:
percpu_ref_cancel_init(&css->refcnt);
+err_free_css:
ss->css_free(css);
return err;
}