Re: [PATCH 0/3] qcow2: Fix alloc_cluster_abort() for pre-existing clusters

[Kevin Wolf]

Am 25.02.2020 um 15:31 hat Max Reitz geschrieben:
> With c3b6658c1a5a3fb2, Kevin has fixed a case in alloc_cluster_abort()
> where we used to free a cluster that wasn’t even allocated by
> handle_alloc(), thus leading to an error and/or corruption.  Besides
> external data files, there is another case where alloc_cluster_abort()
> must not free the “new” cluster: Namely when the cluster isn’t new
> because we’re reusing an existing pre-allocated zero cluster.
> 
> I think Berto’s subcluster series fixes this, too, but it’s still an
> RFC, so I suppose we have to fix the bug independently of it.
> 
> Patch 2 adds a regression test; patch 3 adds a regression test for
> Kevin’s patch c3b6658c1a5a3fb2 (which didn’t come with one).

Thanks, applied to the block branch.

Kevin