diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/qcow2-cluster.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index fb10e26068..2e072ed155 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -278,6 +278,14 @@ static int l2_allocate(BlockDriverState *bs, int l1_index, uint64_t **table) goto fail; } + /* If we're allocating the table at offset 0 then something is wrong */ + if (l2_offset == 0) { + qcow2_signal_corruption(bs, true, -1, -1, "Preventing invalid " + "allocation of L2 table at offset 0"); + ret = -EIO; + goto fail; + } + ret = qcow2_cache_flush(bs, s->refcount_block_cache); if (ret < 0) { goto fail; |