From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48206) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eEYHO-00037T-P4 for qemu-devel@nongnu.org; Tue, 14 Nov 2017 05:17:19 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eEYHI-00075h-Sr for qemu-devel@nongnu.org; Tue, 14 Nov 2017 05:17:18 -0500 From: Anton Nefedov Date: Tue, 14 Nov 2017 13:16:49 +0300 Message-Id: <1510654613-47868-2-git-send-email-anton.nefedov@virtuozzo.com> In-Reply-To: <1510654613-47868-1-git-send-email-anton.nefedov@virtuozzo.com> References: <1510654613-47868-1-git-send-email-anton.nefedov@virtuozzo.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH 1/5] qcow2: reject unaligned offsets in write compressed List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, kwolf@redhat.com, mreitz@redhat.com, eblake@redhat.com, stefanha@redhat.com, famz@redhat.com, den@virtuozzo.com, Anton Nefedov Misaligned compressed write is not supported. Signed-off-by: Anton Nefedov --- 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