3 files changed, 14 insertions, 11 deletions
diff --git a/pkg/safemem/BUILD b/pkg/safemem/BUILD
index 68ed074f8..d3b9b0ca9 100644
--- a/pkg/safemem/BUILD
+++ b/pkg/safemem/BUILD
@@ -11,7 +11,10 @@ go_library(
         "seq_unsafe.go",
     ],
     visibility = ["//:sandbox"],
-    deps = ["//pkg/safecopy"],
+    deps = [
+        "//pkg/gohacks",
+        "//pkg/safecopy",
+    ],
 )
 
 go_test(
diff --git a/pkg/safemem/block_unsafe.go b/pkg/safemem/block_unsafe.go
index 7857f5853..93879bb4f 100644
--- a/pkg/safemem/block_unsafe.go
+++ b/pkg/safemem/block_unsafe.go
@@ -16,9 +16,9 @@ package safemem
 
 import (
 	"fmt"
-	"reflect"
 	"unsafe"
 
+	"gvisor.dev/gvisor/pkg/gohacks"
 	"gvisor.dev/gvisor/pkg/safecopy"
 )
 
@@ -148,12 +148,11 @@ func (b Block) TakeFirst64(n uint64) Block {
 
 // ToSlice returns a []byte equivalent to b.
 func (b Block) ToSlice() []byte {
-	var bs []byte
-	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&bs))
-	hdr.Data = uintptr(b.start)
-	hdr.Len = b.length
-	hdr.Cap = b.length
-	return bs
+	return *(*[]byte)(unsafe.Pointer(&gohacks.SliceHeader{
+		Data: b.start,
+		Len:  b.length,
+		Cap:  b.length,
+	}))
 }
 
 // Addr returns b's start address as a uintptr. It returns uintptr instead of
diff --git a/pkg/safemem/seq_unsafe.go b/pkg/safemem/seq_unsafe.go
index fc4049eeb..b315b0e5a 100644
--- a/pkg/safemem/seq_unsafe.go
+++ b/pkg/safemem/seq_unsafe.go
@@ -17,9 +17,10 @@ package safemem
 import (
 	"bytes"
 	"fmt"
-	"reflect"
 	"syscall"
 	"unsafe"
+
+	"gvisor.dev/gvisor/pkg/gohacks"
 )
 
 // A BlockSeq represents a sequence of Blocks, each of which has non-zero
@@ -184,8 +185,8 @@ func (bs BlockSeq) Tail() BlockSeq {
 		return BlockSeq{}
 	}
 	var extSlice []Block
-	extSliceHdr := (*reflect.SliceHeader)(unsafe.Pointer(&extSlice))
-	extSliceHdr.Data = uintptr(bs.data)
+	extSliceHdr := (*gohacks.SliceHeader)(unsafe.Pointer(&extSlice))
+	extSliceHdr.Data = bs.data
 	extSliceHdr.Len = bs.length
 	extSliceHdr.Cap = bs.length
 	tailSlice := skipEmpty(extSlice[1:])