Backing file should be checked if there is a loop in it during image
boot. Becase if there is loop qemu would no response for a long time
and segment fault occured. So this patch would check backing file
chain if there is loop in it before open image.
Signed-off-by: Xu Wang <cngesa...@gmail.com>
---
blockdev.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/blockdev.c b/blockdev.c
index b3a57e0..b5f063f 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -695,6 +695,12 @@ DriveInfo *drive_init(QemuOpts *all_opts,
BlockInterfaceType block_default_type)
error_report("warning: disabling copy_on_read on readonly drive");
}
+ /* Add backing file loop check */
+ if (bdrv_backing_file_loop_check(file, drv ? drv->format_name : NULL,
+ NULL, NULL)) {
+ goto err;
+ }
+
ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv);
bs_opts = NULL;
--
1.8.1.4
