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[Qemu-devel] [PATCH V9 4/4] blockdev: Add infinite loop check in drive_i
From: |
Xu Wang |
Subject: |
[Qemu-devel] [PATCH V9 4/4] blockdev: Add infinite loop check in drive_init() |
Date: |
Tue, 26 Nov 2013 01:38:33 -0500 |
Check the backing file for a loop during image boot, to avoid a lack or
response or segfault.
Signed-off-by: Xu Wang <address@hidden>
---
blockdev.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/blockdev.c b/blockdev.c
index 330aa4a..e39fc27 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -511,6 +511,13 @@ 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, NULL, &error)) {
+ error_setg(errp, "drive_init: backing file loop check failed. %s",
+ error_get_pretty(error));
+ goto err;
+ }
+
QINCREF(bs_opts);
ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv, &error);
--
1.8.1.4