From: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
Date: Mon, 24 Apr 2023 09:31:38 +0000 (+0200)
Subject: parallels: Fix image_end_offset and data_end after out-of-image check
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=679749ce41bc61ff92fb857a66497a03c241b8c2;p=qemu.git

parallels: Fix image_end_offset and data_end after out-of-image check

Set data_end to the end of the last cluster inside the image. In such a
way we can be sure that corrupted offsets in the BAT can't affect on the
image size. If there are no allocated clusters set image_end_offset by
data_end.

Signed-off-by: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
Reviewed-by: Denis V. Lunev <den@openvz.org>
Message-Id: <20230424093147.197643-4-alexander.ivanov@virtuozzo.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
---

diff --git a/block/parallels.c b/block/parallels.c
index 204d20685b..ea382e8382 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -490,7 +490,13 @@ parallels_co_check(BlockDriverState *bs, BdrvCheckResult *res,
         }
     }
 
-    res->image_end_offset = high_off + s->cluster_size;
+    if (high_off == 0) {
+        res->image_end_offset = s->data_end << BDRV_SECTOR_BITS;
+    } else {
+        res->image_end_offset = high_off + s->cluster_size;
+        s->data_end = res->image_end_offset >> BDRV_SECTOR_BITS;
+    }
+
     if (size > res->image_end_offset) {
         int64_t count;
         count = DIV_ROUND_UP(size - res->image_end_offset, s->cluster_size);