[Xen-changelog] [qemu-xen master] block/qcow2-bitmap: fix use of uninitialized pointer

[patchbot@xxxxxxx]

commit 780fb4ce48bce4d6755972bf783dff915b0d1a11
Author:     Vladimir Sementsov-Ogievskiy <vsementsov@xxxxxxxxxxxxx>
AuthorDate: Fri Sep 22 17:43:53 2017 +0300
Commit:     Michael Roth <mdroth@xxxxxxxxxxxxxxxxxx>
CommitDate: Thu Sep 28 16:51:42 2017 -0500

    block/qcow2-bitmap: fix use of uninitialized pointer
    
    Without initialization to zero dirty_bitmap field may be not zero
    for a bitmap which should not be stored and
    qcow2_store_persistent_dirty_bitmaps will erroneously call
    store_bitmap for it which leads to SIGSEGV on bdrv_dirty_bitmap_name.
    
    Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@xxxxxxxxxxxxx>
    Message-id: 20170922144353.4220-1-vsementsov@xxxxxxxxxxxxx
    Cc: qemu-stable@xxxxxxxxxx
    Reviewed-by: Eric Blake <eblake@xxxxxxxxxx>
    Reviewed-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
    Signed-off-by: Max Reitz <mreitz@xxxxxxxxxx>
    (cherry picked from commit 5330f32b71b1868bdb3b444733063cb5adc4e8e6)
    Signed-off-by: Michael Roth <mdroth@xxxxxxxxxxxxxxxxxx>
---
 block/qcow2-bitmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c
index e8d3bdb..14f41d0 100644
--- a/block/qcow2-bitmap.c
+++ b/block/qcow2-bitmap.c
@@ -602,7 +602,7 @@ static Qcow2BitmapList *bitmap_list_load(BlockDriverState 
*bs, uint64_t offset,
             goto fail;
         }
 
-        bm = g_new(Qcow2Bitmap, 1);
+        bm = g_new0(Qcow2Bitmap, 1);
         bm->table.offset = e->bitmap_table_offset;
         bm->table.size = e->bitmap_table_size;
         bm->flags = e->flags;
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#master

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxx
https://lists.xenproject.org/xen-changelog