commit 62518b8b1dccb67969688228f14fb379f1918ede
author Jan Kiszka <jan.kiszka@siemens.com> Fri May 01 20:52:47 2009 +0200
committer Anthony Liguori <aliguori@us.ibm.com> Fri May 22 10:50:33 2009 -0500
tree e4942fb579f1861d9e0a9861060db8c2e79a8fef
parent 4495d6a74575b4ee7e9aabdc66e67b6c9e19a698

kvm: Fix dirty log temporary buffer size

The buffer passed to KVM_GET_DIRTY_LOG requires one bit per page. Fix
the size calculation in kvm_physical_sync_dirty_bitmap accordingly,
avoiding allocation of extremly oversized buffers.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

kvm-all.c

diff --git a/kvm-all.c b/kvm-all.c
index f4851c0..3b6b5ed 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -290,7 +290,7 @@
             return;
     }
 
-    alloc_size = mem->memory_size >> TARGET_PAGE_BITS / sizeof(d.dirty_bitmap);
+    alloc_size = ((mem->memory_size >> TARGET_PAGE_BITS) + 7) / 8;
     d.dirty_bitmap = qemu_mallocz(alloc_size);
 
     d.slot = mem->slot;