From 16e07bc282c3c2d560ae9c4e9db76106975495eb Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Tue, 8 Feb 2011 18:12:35 +0100 Subject: qcow2: Fix error handling for immediate backing file read failure Requests could return success even though they failed when bdrv_aio_readv returned NULL for a backing file read. Reported-by: Chunqiang Tang Signed-off-by: Kevin Wolf (cherry picked from commit 3ab4c7e92d39d40e6dc0bdb1c2320889543691cb) --- block/qcow2.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/block/qcow2.c b/block/qcow2.c index 28338bf9d0..647c2a4bc4 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -479,8 +479,10 @@ static void qcow2_aio_read_cb(void *opaque, int ret) BLKDBG_EVENT(bs->file, BLKDBG_READ_BACKING_AIO); acb->hd_aiocb = bdrv_aio_readv(bs->backing_hd, acb->sector_num, &acb->hd_qiov, n1, qcow2_aio_read_cb, acb); - if (acb->hd_aiocb == NULL) + if (acb->hd_aiocb == NULL) { + ret = -EIO; goto done; + } } else { ret = qcow2_schedule_bh(qcow2_aio_read_bh, acb); if (ret < 0) -- cgit v1.2.3