Fix CVE-2008-0928 - insufficient block device address range checking

Qemu 0.9.1 and earlier does not perform range checks for block device
read or write requests, which allows guest host users with root
privileges to access arbitrary memory and escape the virtual machine.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4037 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 1 insertions, 0 deletions

diff --git a/block_int.h b/block_int.h
index 137000e140..27e90b87e1 100644
--- a/block_int.h
+++ b/block_int.h
@@ -97,6 +97,7 @@ struct BlockDriverState {
     int locked;    /* if true, the media cannot temporarily be ejected */
     int encrypted; /* if true, the media is encrypted */
     int sg;        /* if true, the device is a /dev/sg* */
+    int autogrow;  /* if true, the backing store can auto-extend to allocate new extents */
     /* event callback when inserting/removing */
     void (*change_cb)(void *opaque);
     void *change_opaque;