commit a275fa42fa872828585e9e6a92f975e87776554b
author Paolo Bonzini <pbonzini@redhat.com> Tue May 08 16:51:43 2012 +0200
committer Kevin Wolf <kwolf@redhat.com> Thu May 10 10:32:12 2012 +0200
tree 353f0557791d7203d9587e291a65c5277a6606bf
parent 3a389e7926750cba5c83f662b1941888b2bebc04

block: do not reuse the backing file across bdrv_close/bdrv_open

This is another bug caused by not doing a full cleanup of the BDS
across close/open.  This was found with mirroring by Shaolong Hu,
but it can probably be reproduced also with eject or change.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

block.c

diff --git a/block.c b/block.c
index 6dc0d44..271f109 100644
--- a/block.c
+++ b/block.c
@@ -878,6 +878,8 @@
         bs->opaque = NULL;
         bs->drv = NULL;
         bs->copy_on_read = 0;
+        bs->backing_file[0] = '\0';
+        bs->backing_format[0] = '\0';
 
         if (bs->file != NULL) {
             bdrv_close(bs->file);