From 0b1aab54355fb50522605e4d51018f905ddc6305 Mon Sep 17 00:00:00 2001
From: lalyos <lalyos@yahoo.com>
Date: Fri, 25 Apr 2014 05:54:20 +0200
Subject: [PATCH] Fixes 5370 infinite/maxLoopCount loop for relative symlinks

use path.IsAbs() instead of checking if first char is '/'

Docker-DCO-1.1-Signed-off-by: Lajos Papp <lajos.papp@sequenceiq.com> (github: lalyos)
---
 symlink/fs.go | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/symlink/fs.go b/symlink/fs.go
index 4dcfdf3..257491f 100644
--- a/symlink/fs.go
+++ b/symlink/fs.go
@@ -63,10 +63,9 @@ func FollowSymlinkInScope(link, root string) (string, error) {
 					return "", err
 				}
 
-				switch dest[0] {
-				case '/':
+				if path.IsAbs(dest) {
 					prev = filepath.Join(root, dest)
-				case '.':
+				} else {
 					prev, _ = filepath.Abs(prev)
 
 					if prev = filepath.Clean(filepath.Join(filepath.Dir(prev), dest)); len(prev) < len(root) {