From: Liu Yuan <namei.u...@gmail.com>
For a fifo read pattern, we only have one running aio (possible other cases that
has less number than num_children in the future), so we need to check if
.acb is NULL against bdrv_aio_cancel() to avoid segfault.
Cc: Eric Blake <ebl...@redhat.com>
Cc: Benoit Canet <ben...@irqsave.net>
Cc: Kevin Wolf <kw...@redhat.com>
Cc: Stefan Hajnoczi <stefa...@redhat.com>
Signed-off-by: Liu Yuan <namei.u...@gmail.com>
Signed-off-by: Fam Zheng <f...@redhat.com>
---
block/quorum.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/block/quorum.c b/block/quorum.c
index 093382e..41c4249 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -138,7 +138,9 @@ static void quorum_aio_cancel(BlockDriverAIOCB *blockacb)
/* cancel all callbacks */
for (i = 0; i < s->num_children; i++) {
- bdrv_aio_cancel(acb->qcrs[i].aiocb);
+ if (acb->qcrs[i].aiocb) {
+ bdrv_aio_cancel(acb->qcrs[i].aiocb);
+ }
}
g_free(acb->qcrs);
--
1.9.3
