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qcow2: reject unaligned offsets in write compressed

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Misaligned compressed write is not supported.

Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com>
Message-id: 1510654613-47868-2-git-send-email-anton.nefedov@virtuozzo.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Anton Nefedov 2017-11-14 13:16:49 +03:00 committed by Max Reitz
parent 2b7731938d
commit 3e3b838ffe
1 changed files with 4 additions and 0 deletions
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4
block/qcow2.c
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@ -3358,6 +3358,10 @@ 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 ||