[PATCH v2 3/3] savevm: check RAM is pagesize aligned

[Marc-André Lureau]

Check the host pointer is correctly aligned, otherwise we may fail
during migration in ram_block_discard_range().

Signed-off-by: Marc-André Lureau <address@hidden>
---
 migration/savevm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/migration/savevm.c b/migration/savevm.c
index a71b930b91..bbb7e89682 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -2910,6 +2910,11 @@ err_drain:
 
 void vmstate_register_ram(MemoryRegion *mr, DeviceState *dev)
 {
+    RAMBlock *rb = mr->ram_block;
+
+    assert(QEMU_PTR_IS_ALIGNED(qemu_ram_get_host_addr(rb),
+                               qemu_ram_pagesize(rb)));
+
     qemu_ram_set_idstr(mr->ram_block,
                        memory_region_name(mr), dev);
     qemu_ram_set_migratable(mr->ram_block);
-- 
2.24.0.308.g228f53135a