From: Xu Wang <cngesa...@gmail.com>
Every image should be checked if there is infinite loop in backing
file chain before open it. So infinite loop check was added into
bdrv_new_open(). If @filename is opened with no flags
BDRV_O_NO_BACKING, the infinite loop check should be called.
Signed-off-by: Xu Wang <cngesa...@gmail.com>
---
qemu-img.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/qemu-img.c b/qemu-img.c
index 4f01b0a..1a63bbf 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -278,6 +278,13 @@ static BlockDriverState *bdrv_new_open(const char
*filename,
drv = NULL;
}
+ /* check backing file loop if the whole chain need to be opened */
+ if (!(flags & BDRV_O_NO_BACKING) &&
+ bdrv_backing_file_loop_check(filename, fmt, NULL, NULL)) {
+ error_report("bdrv_new_open: Open %s failed.", filename);
+ goto fail;
+ }
+
ret = bdrv_open(bs, filename, NULL, flags, drv);
if (ret < 0) {
error_report("Could not open '%s': %s", filename, strerror(-ret));
--
1.8.1.4
