BlockDriverState members change_cb and change_opaque are initially
null. The device model may set them, with bdrv_set_change_cb(). If
the device model gets detached (hot unplug), they're left dangling.
Only safe because device hot unplug automatically destroys the
BlockDriverState. But that's a questionable feature, best not to rely
on it.
Signed-off-by: Markus Armbruster <arm...@redhat.com>
---
block.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/block.c b/block.c
index 24a25d5..c49a825 100644
--- a/block.c
+++ b/block.c
@@ -730,6 +730,8 @@ void bdrv_detach(BlockDriverState *bs, DeviceState *qdev)
{
assert(bs->peer == qdev);
bs->peer = NULL;
+ bs->change_cb = NULL;
+ bs->change_opaque = NULL;
}
DeviceState *bdrv_get_attached(BlockDriverState *bs)
--
1.7.2.3
