[Qemu-devel] [PATCH 058/156] stellaris_enet: block migration

[Michael Roth]

From: "Michael S. Tsirkin" <address@hidden>

Incoming migration with stellaris_enet is unsafe.
It's being reworked, but for now, simply block it
since noone is using it anyway.
Block outgoing migration for good measure.

CVE-2013-4532

Signed-off-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Michael Roth <address@hidden>
---
 hw/net/stellaris_enet.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/hw/net/stellaris_enet.c b/hw/net/stellaris_enet.c
index 376c7b0..0574d10 100644
--- a/hw/net/stellaris_enet.c
+++ b/hw/net/stellaris_enet.c
@@ -8,6 +8,7 @@
  */
 #include "hw/sysbus.h"
 #include "net/net.h"
+#include "migration/migration.h"
 #include <zlib.h>
 
 //#define DEBUG_STELLARIS_ENET 1
@@ -75,6 +76,7 @@ typedef struct {
     NICConf conf;
     qemu_irq irq;
     MemoryRegion mmio;
+    Error *migration_blocker;
 } stellaris_enet_state;
 
 static void stellaris_enet_update(stellaris_enet_state *s)
@@ -361,7 +363,7 @@ static int stellaris_enet_load(QEMUFile *f, void *opaque, 
int version_id)
     stellaris_enet_state *s = (stellaris_enet_state *)opaque;
     int i;
 
-    if (version_id != 1)
+    if (1)
         return -EINVAL;
 
     s->ris = qemu_get_be32(f);
@@ -422,6 +424,10 @@ static int stellaris_enet_init(SysBusDevice *sbd)
     stellaris_enet_reset(s);
     register_savevm(dev, "stellaris_enet", -1, 1,
                     stellaris_enet_save, stellaris_enet_load, s);
+
+    error_setg(&s->migration_blocker,
+            "stellaris_enet does not support migration");
+    migrate_add_blocker(s->migration_blocker);
     return 0;
 }
 
@@ -429,6 +435,9 @@ static void stellaris_enet_unrealize(DeviceState *dev, 
Error **errp)
 {
     stellaris_enet_state *s = STELLARIS_ENET(dev);
 
+    migrate_del_blocker(s->migration_blocker);
+    error_free(s->migration_blocker);
+
     unregister_savevm(DEVICE(s), "stellaris_enet", s);
 
     memory_region_destroy(&s->mmio);
-- 
1.9.1