diff options
| -rw-r--r-- | block-qcow2.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/block-qcow2.c b/block-qcow2.c index eacac4d35d..7840634b57 100644 --- a/block-qcow2.c +++ b/block-qcow2.c @@ -2666,6 +2666,13 @@ static int check_refcounts_l2(BlockDriverState *bs, errors += inc_refcounts(bs, refcount_table, refcount_table_size, offset, s->cluster_size); + + /* Correct offsets are cluster aligned */ + if (offset & (s->cluster_size - 1)) { + fprintf(stderr, "ERROR offset=%" PRIx64 ": Cluster is not " + "properly aligned; L2 entry corrupted.\n", offset); + errors++; + } } } } @@ -2734,6 +2741,13 @@ static int check_refcounts_l1(BlockDriverState *bs, l2_offset, s->cluster_size); + /* L2 tables are cluster aligned */ + if (l2_offset & (s->cluster_size - 1)) { + fprintf(stderr, "ERROR l2_offset=%" PRIx64 ": Table is not " + "cluster aligned; L1 entry corrupted\n", l2_offset); + errors++; + } + /* Process and check L2 entries */ ret = check_refcounts_l2(bs, refcount_table, refcount_table_size, l2_offset, check_copied); |