--- /dev/null
+From f83d05c3be3c3bcc84f6fa229504848ee8078321 Mon Sep 17 00:00:00 2001
+From: Vincent Batts <vbatts@redhat.com>
+Date: Fri, 7 Aug 2015 10:18:20 -0400
+Subject: [PATCH] devicemapper: fix zero-sized field access
+
+Fixes: #15279
+
+Due to
+https://github.com/golang/go/commit/7904946eeb35faece61bbf6f5b3cc8be2f519c17
+the devices field is dropped.
+
+This solution works on go1.4 and go1.5
+
+Signed-off-by: Vincent Batts <vbatts@redhat.com>
+---
+ daemon/graphdriver/devmapper/deviceset.go | 14 +++++++++-----
+ pkg/devicemapper/devmapper_wrapper.go | 18 +++++++++++++++---
+ 2 files changed, 24 insertions(+), 8 deletions(-)
+
+diff --git a/daemon/graphdriver/devmapper/deviceset.go b/daemon/graphdriver/devmapper/deviceset.go
+index 6dddeb1..97e2032 100644
+--- a/daemon/graphdriver/devmapper/deviceset.go
++++ b/daemon/graphdriver/devmapper/deviceset.go
+@@ -1509,12 +1509,16 @@ func (devices *DeviceSet) deactivatePool() error {
+ if err != nil {
+ return err
+ }
+- if d, err := devicemapper.GetDeps(devname); err == nil {
+- // Access to more Debug output
+- logrus.Debugf("[devmapper] devicemapper.GetDeps() %s: %#v", devname, d)
++
++ if devinfo.Exists == 0 {
++ return nil
+ }
+- if devinfo.Exists != 0 {
+- return devicemapper.RemoveDevice(devname)
++ if err := devicemapper.RemoveDevice(devname); err != nil {
++ return err
++ }
++
++ if d, err := devicemapper.GetDeps(devname); err == nil {
++ logrus.Warnf("[devmapper] device %s still has %d active dependents", devname, d.Count)
+ }
+
+ return nil
+diff --git a/pkg/devicemapper/devmapper_wrapper.go b/pkg/devicemapper/devmapper_wrapper.go
+index 87c2003..44ca772 100644
+--- a/pkg/devicemapper/devmapper_wrapper.go
++++ b/pkg/devicemapper/devmapper_wrapper.go
+@@ -38,7 +38,10 @@ static void log_with_errno_init()
+ */
+ import "C"
+
+-import "unsafe"
++import (
++ "reflect"
++ "unsafe"
++)
+
+ type (
+ CDmTask C.struct_dm_task
+@@ -184,12 +187,21 @@ func dmTaskGetDepsFct(task *CDmTask) *Deps {
+ if Cdeps == nil {
+ return nil
+ }
++
++ // golang issue: https://github.com/golang/go/issues/11925
++ hdr := reflect.SliceHeader{
++ Data: uintptr(unsafe.Pointer(uintptr(unsafe.Pointer(Cdeps)) + unsafe.Sizeof(*Cdeps))),
++ Len: int(Cdeps.count),
++ Cap: int(Cdeps.count),
++ }
++ devices := *(*[]C.uint64_t)(unsafe.Pointer(&hdr))
++
+ deps := &Deps{
+ Count: uint32(Cdeps.count),
+ Filler: uint32(Cdeps.filler),
+ }
+- for _, device := range Cdeps.device {
+- deps.Device = append(deps.Device, (uint64)(device))
++ for _, device := range devices {
++ deps.Device = append(deps.Device, uint64(device))
+ }
+ return deps
+ }