diff --git a/grub-core/net/drivers/ieee1275/ofnet.c b/grub-core/net/drivers/ieee1275/ofnet.c
index cec0ccc3c..a78d164db 100644
--- a/grub-core/net/drivers/ieee1275/ofnet.c
+++ b/grub-core/net/drivers/ieee1275/ofnet.c
@@ -85,24 +85,30 @@ get_card_packet (struct grub_net_card *dev)
   grub_uint64_t start_time;
   struct grub_net_buff *nb;
 
-  nb = grub_netbuff_alloc (dev->mtu + 64 + 2);
+  start_time = grub_get_time_ms ();
+  do
+    rc = grub_ieee1275_read (data->handle, dev->rcvbuf, dev->rcvbufsize, &actual);
+  while ((actual <= 0 || rc < 0) && (grub_get_time_ms () - start_time < 200));
+
+  if (actual <= 0)
+    return NULL;
+
+  nb = grub_netbuff_alloc (actual + 2);
   if (!nb)
     return NULL;
   /* Reserve 2 bytes so that 2 + 14/18 bytes of ethernet header is divisible
      by 4. So that IP header is aligned on 4 bytes. */
   grub_netbuff_reserve (nb, 2);
 
-  start_time = grub_get_time_ms ();
-  do
-    rc = grub_ieee1275_read (data->handle, nb->data, dev->mtu + 64, &actual);
-  while ((actual <= 0 || rc < 0) && (grub_get_time_ms () - start_time < 200));
-  if (actual > 0)
+  grub_memcpy (nb->data, dev->rcvbuf, actual);
+
+  if (grub_netbuff_put (nb, actual))
     {
-      grub_netbuff_put (nb, actual);
-      return nb;
+      grub_netbuff_free (nb);
+      return NULL;
     }
-  grub_netbuff_free (nb);
-  return NULL;
+
+  return nb;
 }
 
 static struct grub_net_card_driver ofdriver =
@@ -327,6 +333,40 @@ grub_ieee1275_alloc_mem (grub_size_t len)
     return (void *)args.result;
 }
 
+/* Free memory allocated by alloc-mem */
+static grub_err_t
+grub_ieee1275_free_mem (void *addr, grub_size_t len)
+{
+  struct free_args
+  {
+    struct grub_ieee1275_common_hdr common;
+    grub_ieee1275_cell_t method;
+    grub_ieee1275_cell_t len;
+    grub_ieee1275_cell_t addr;
+    grub_ieee1275_cell_t catch;
+  }
+  args;
+
+  if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_CANNOT_INTERPRET))
+    {
+      grub_error (GRUB_ERR_UNKNOWN_COMMAND, N_("interpret is not supported"));
+      return grub_errno;
+    }
+
+  INIT_IEEE1275_COMMON (&args.common, "interpret", 3, 1);
+  args.addr = (grub_ieee1275_cell_t)addr;
+  args.len = len;
+  args.method = (grub_ieee1275_cell_t) "free-mem";
+
+  if (IEEE1275_CALL_ENTRY_FN(&args) == -1 || args.catch)
+    {
+      grub_error (GRUB_ERR_INVALID_COMMAND, N_("free-mem failed"));
+      return grub_errno;
+    }
+
+  return GRUB_ERR_NONE;
+}
+
 static void *
 ofnet_alloc_netbuf (grub_size_t len)
 {
@@ -336,6 +376,15 @@ ofnet_alloc_netbuf (grub_size_t len)
     return grub_zalloc (len);
 }
 
+static void
+ofnet_free_netbuf (void *addr, grub_size_t len)
+{
+  if (grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_VIRT_TO_REAL_BROKEN))
+    grub_ieee1275_free_mem (addr, len);
+  else
+    grub_free (addr);
+}
+
 static int
 search_net_devices (struct grub_ieee1275_devalias *alias)
 {
@@ -451,15 +500,19 @@ search_net_devices (struct grub_ieee1275_devalias *alias)
   card->default_address = lla;
 
   card->txbufsize = ALIGN_UP (card->mtu, 64) + 256;
+  card->rcvbufsize = ALIGN_UP (card->mtu, 64) + 256;
 
   card->txbuf = ofnet_alloc_netbuf (card->txbufsize);
   if (!card->txbuf)
+    goto fail_netbuf;
+
+  card->rcvbuf = ofnet_alloc_netbuf (card->rcvbufsize);
+  if (!card->rcvbuf)
     {
-      grub_free (ofdata->path);
-      grub_free (ofdata);
-      grub_free (card);
-      grub_print_error ();
-      return 0;
+      grub_error_push ();
+      ofnet_free_netbuf (card->txbuf, card->txbufsize);
+      grub_error_pop ();
+      goto fail_netbuf;
     }
   card->driver = NULL;
   card->data = ofdata;
@@ -472,6 +525,13 @@ search_net_devices (struct grub_ieee1275_devalias *alias)
   card->driver = &ofdriver;
   grub_net_card_register (card);
   return 0;
+
+fail_netbuf:
+  grub_free (ofdata->path);
+  grub_free (ofdata);
+  grub_free (card);
+  grub_print_error ();
+  return 0;
 }
 
 static void