diff options
| author | QingFeng Hao <haoqf@linux.vnet.ibm.com> | 2016-12-16 06:20:40 +0100 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2017-02-12 00:47:42 +0100 |
| commit | 4545d4f4af8b29ba3b38dfb74d6f45342e15a62d (patch) | |
| tree | 4428bc6f4d530ad3fb51b6976f7d36b836f4b6a3 /block/vmdk.c | |
| parent | 36bd4228126139a382a4fdbc49c96798a9894626 (diff) | |
block/vmdk: Fix the endian problem of buf_len and lba
The problem was triggered by qemu-iotests case 055. It failed when it
was comparing the compressed vmdk image with original test.img.
The cause is that buf_len in vmdk_write_extent wasn't converted to
little-endian before it was stored to disk. But later vmdk_read_extent
read it and converted it from little-endian to cpu endian.
If the cpu is big-endian like s390, the problem will happen and
the data length read by vmdk_read_extent will become invalid!
The fix is to add the conversion in vmdk_write_extent, meanwhile,
repair the endianness problem of lba field which shall also be converted
to little-endian before storing to disk.
Cc: qemu-stable@nongnu.org
Signed-off-by: QingFeng Hao <haoqf@linux.vnet.ibm.com>
Signed-off-by: Jing Liu <liujbjl@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-id: 20161216052040.53067-2-haoqf@linux.vnet.ibm.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'block/vmdk.c')
| -rw-r--r-- | block/vmdk.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/block/vmdk.c b/block/vmdk.c index 7750212969..393c84d8b1 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -1361,8 +1361,8 @@ static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, goto out; } - data->lba = offset >> BDRV_SECTOR_BITS; - data->size = buf_len; + data->lba = cpu_to_le64(offset >> BDRV_SECTOR_BITS); + data->size = cpu_to_le32(buf_len); n_bytes = buf_len + sizeof(VmdkGrainMarker); iov = (struct iovec) { |