Re: [Qemu-devel] [PATCH] specs: mandate qcow2 v2 end-of-extensions in v3 header

2013-12-17 Thread Stefan Hajnoczi
On Mon, Dec 16, 2013 at 05:52:08PM -0700, Eric Blake wrote: > At least libvirt 0.10.2 has a bug where it can be provoked > into attempting to search for extension headers (in particular, > the backing file format header) without first validating that > a particular file is qcow2 version 2. Fortuna

[Qemu-devel] [PATCH] specs: mandate qcow2 v2 end-of-extensions in v3 header

2013-12-16 Thread Eric Blake
At least libvirt 0.10.2 has a bug where it can be provoked into attempting to search for extension headers (in particular, the backing file format header) without first validating that a particular file is qcow2 version 2. Fortunately, to date, this probe always ends early when feeding a version 3