diff --git a/nogo.yaml b/nogo.yaml
index f4b62cf5b..d9b6a5ffe 100644
--- a/nogo.yaml
+++ b/nogo.yaml
@@ -107,7 +107,7 @@ analyzers:
         - pkg/sentry/socket/unix/transport/connectioned.go                 # unsupported usage.
         - pkg/sentry/vfs/dentry.go                                         # unsupported usage.
         - pkg/tcpip/network/internal/ip/generic_multicast_protocol_test.go # unsupported usage.
-        - pkg/tcpip/stack/conntrack.go                                     # unsupported usage.        
+        - pkg/tcpip/stack/conntrack.go                                     # unsupported usage.
         - pkg/tcpip/transport/packet/endpoint_state.go                     # unsupported usage.
         - pkg/tcpip/transport/raw/endpoint_state.go                        # unsupported usage.
         - pkg/tcpip/transport/icmp/endpoint.go                             # unsupported usage.
@@ -177,6 +177,7 @@ analyzers:
         - pkg/sentry/platform/kvm/bluepill_unsafe.go               # Special case.
         - pkg/sentry/platform/kvm/machine_unsafe.go                # Special case.
         - pkg/sentry/platform/safecopy/safecopy_unsafe.go          # Special case.
+        - pkg/sentry/usage/memory_unsafe.go                        # Special case.
         - pkg/sentry/vfs/mount_unsafe.go                           # Special case.
         - pkg/state/decode_unsafe.go                               # Special case.
   unusedresult:
diff --git a/pkg/sentry/usage/memory.go b/pkg/sentry/usage/memory.go
index 581862ee2..e7073ec87 100644
--- a/pkg/sentry/usage/memory.go
+++ b/pkg/sentry/usage/memory.go
@@ -132,7 +132,7 @@ func Init() error {
 	// always be the case for a newly mapped page from /dev/shm. If we obtain
 	// the shared memory through some other means in the future, we may have to
 	// explicitly zero the page.
-	mmap, err := unix.Mmap(int(file.Fd()), 0, int(RTMemoryStatsSize), unix.PROT_READ|unix.PROT_WRITE, unix.MAP_SHARED)
+	mmap, err := memutil.MapFile(0, RTMemoryStatsSize, unix.PROT_READ|unix.PROT_WRITE, unix.MAP_SHARED, file.Fd(), 0)
 	if err != nil {
 		return fmt.Errorf("error mapping usage file: %v", err)
 	}
diff --git a/pkg/sentry/usage/memory_unsafe.go b/pkg/sentry/usage/memory_unsafe.go
index 9e0014ca0..bc1531b91 100644
--- a/pkg/sentry/usage/memory_unsafe.go
+++ b/pkg/sentry/usage/memory_unsafe.go
@@ -21,7 +21,7 @@ import (
 // RTMemoryStatsSize is the size of the RTMemoryStats struct.
 var RTMemoryStatsSize = unsafe.Sizeof(RTMemoryStats{})
 
-// RTMemoryStatsPointer casts the address of the byte slice into a RTMemoryStats pointer.
-func RTMemoryStatsPointer(b []byte) *RTMemoryStats {
-	return (*RTMemoryStats)(unsafe.Pointer(&b[0]))
+// RTMemoryStatsPointer casts addr to a RTMemoryStats pointer.
+func RTMemoryStatsPointer(addr uintptr) *RTMemoryStats {
+	return (*RTMemoryStats)(unsafe.Pointer(addr))
 }