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qcow2: Correct endianness in overlap check 

If an inactive L1 table is loaded from disk, its entries are in big
endian and have to be converted to host byte order before using them.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Max Reitz 2013-09-30 08:59:28 +02:00 committed by Stefan Hajnoczi
parent a684f3cf9b
commit 1e242b5544
1 changed files with 2 additions and 2 deletions
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4
block/qcow2-refcount.c
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@ -1733,8 +1733,8 @@ int qcow2_check_metadata_overlap(BlockDriverState *bs, int chk, int64_t offset,
}
for (j = 0; j < l1_sz; j++) {
if ((l1[j] & L1E_OFFSET_MASK) &&
overlaps_with(l1[j] & L1E_OFFSET_MASK, s->cluster_size)) {
uint64_t l2_ofs = be64_to_cpu(l1[j]) & L1E_OFFSET_MASK;
if (l2_ofs && overlaps_with(l2_ofs, s->cluster_size)) {
g_free(l1);
return QCOW2_OL_INACTIVE_L2;
}