From ad6db8332b1ee9c6077db703c5572f96dbdd0ad4 Mon Sep 17 00:00:00 2001
From: Libo Chen <libo.chen@huawei.com>
Date: Thu, 16 May 2013 21:00:43 +0800
Subject: [PATCH] mountns: potential fd leak when readlinkat call

when mntns_collect_root->readlinkat call faild, we should close pdf

Signed-off-by: Libo Chen <libo.chen@huawei.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
---
 mount.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mount.c b/mount.c
index d30bbfae1..66e263c1f 100644
--- a/mount.c
+++ b/mount.c
@@ -787,8 +787,10 @@ int mntns_collect_root(pid_t pid)
 
 	pfd = open_pid_proc(pid);
 	ret = readlinkat(pfd, "root", path, sizeof(path) - 1);
-	if (ret < 0)
+	if (ret < 0){
+		close_pid_proc();
 		return ret;
+	}
 
 	path[ret] = '\0';