diff options
| author | Al Viro | 2019-11-10 11:53:27 -0500 |
|---|---|---|
| committer | Al Viro | 2019-11-10 11:53:27 -0500 |
| commit | 630faf81b3e61bcc90dc6d8b497800657d2752a5 (patch) | |
| tree | d3cd6fc1af3908d7c40160ffa9b54474754cda70 /kernel/cgroup | |
| parent | 03ad0d703df75c43f78bd72e16124b5b94a95188 (diff) | |
cgroup: don't put ERR_PTR() into fc->root
the caller of ->get_tree() expects NULL left there on error...
Reported-by: Thibaut Sautereau <thibaut@sautereau.fr>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/cgroup')
| -rw-r--r-- | kernel/cgroup/cgroup.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 080561bb8a4b..ef4242e5d4bc 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -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) |