From 3cc9b23c8137e9bb4eaf6d97d825b7f0dc711d0c Mon Sep 17 00:00:00 2001 From: "Serge E. Hallyn" Date: Thu, 12 May 2016 00:29:45 -0500 Subject: [PATCH] kernfs: kernfs_sop_show_path: don't return 0 after seq_dentry call Our caller expects 0 on success, not >0. This fixes a bug in the patch cgroup, kernfs: make mountinfo show properly scoped path for cgroup namespaces where /sys does not show up in mountinfo, breaking criu. Thanks for catching this, Andrei. Reported-by: Andrei Vagin Signed-off-by: Serge Hallyn Signed-off-by: Tejun Heo --- fs/kernfs/mount.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c index 3b78724c1979..3d670a3678f2 100644 --- a/fs/kernfs/mount.c +++ b/fs/kernfs/mount.c @@ -50,7 +50,8 @@ static int kernfs_sop_show_path(struct seq_file *sf, struct dentry *dentry) if (scops && scops->show_path) return scops->show_path(sf, node, root); - return seq_dentry(sf, dentry, " \t\n\\"); + seq_dentry(sf, dentry, " \t\n\\"); + return 0; } const struct super_operations kernfs_sops = {