Commit 3e3b838f authored by Anton Nefedov's avatar Anton Nefedov Committed by Max Reitz
Browse files

qcow2: reject unaligned offsets in write compressed 



Misaligned compressed write is not supported.

Signed-off-by: default avatarAnton Nefedov <anton.nefedov@virtuozzo.com>
Message-id: 1510654613-47868-2-git-send-email-anton.nefedov@virtuozzo.com
Reviewed-by: default avatarEric Blake <eblake@redhat.com>
Signed-off-by: default avatarMax Reitz <mreitz@redhat.com>
parent 2b773193

block/qcow2.c

+4 −0
Original line number Diff line number Diff line
@@ -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 ||