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[Qemu-block] [PATCH 1/5] qcow2: reject unaligned offsets in write compre
From: |
Anton Nefedov |
Subject: |
[Qemu-block] [PATCH 1/5] qcow2: reject unaligned offsets in write compressed |
Date: |
Tue, 14 Nov 2017 13:16:49 +0300 |
Misaligned compressed write is not supported.
Signed-off-by: Anton Nefedov <address@hidden>
---
block/qcow2.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/block/qcow2.c b/block/qcow2.c
index 92cb9f9..45c5651 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3349,6 +3349,10 @@ qcow2_co_pwritev_compressed(BlockDriverState *bs,
uint64_t offset,
return bdrv_truncate(bs->file, cluster_offset, PREALLOC_MODE_OFF,
NULL);
}
+ if (offset_into_cluster(s, offset)) {
+ return -EINVAL;
+ }
+
buf = qemu_blockalign(bs, s->cluster_size);
if (bytes != s->cluster_size) {
if (bytes > s->cluster_size ||
--
2.7.4