Check the backing file for a loop during image boot, to avoid a lack or response or segfault.
Signed-off-by: Xu Wang <gesa...@linux.vnet.ibm.com> --- blockdev.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/blockdev.c b/blockdev.c index b260477..7c0927f 100644 --- a/blockdev.c +++ b/blockdev.c @@ -510,6 +510,12 @@ static DriveInfo *blockdev_init(QDict *bs_opts, bdrv_flags |= ro ? 0 : BDRV_O_RDWR; + /* Add backing file loop check */ + if (!bdrv_backing_chain_okay(file, drv ? drv->format_name : NULL)) { + error_report("drive_init: backing file loop check failed"); + goto err; + } + QINCREF(bs_opts); ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv, &error); -- 1.8.1.4