If an AIO request is in flight that refers to a BlockDriverState that
has been closed and possibly even freed, more or less anything could
happen. I have seen segfaults, -EBADF return values and qcow2 sometimes
actually catches the situation in bdrv_close() and abort()s.
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
block.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/block.c b/block.c
index c0c90f0..4b96654 100644
--- a/block.c
+++ b/block.c
@@ -816,6 +816,8 @@ void bdrv_close(BlockDriverState *bs)
if (bs->job) {
block_job_cancel_sync(bs->job);
}
+ bdrv_drain_all();
+
if (bs == bs_snapshots) {
bs_snapshots = NULL;
}
--
1.7.6.5
