On Thu, Jul 08, 2021 at 01:47:04PM +0200, Kevin Wolf wrote: > Without an external data file, s->data_file is a second pointer with the > same value as bs->file. When changing bs->file to a different BdrvChild > and freeing the old BdrvChild, s->data_file must also be updated, > otherwise it points to freed memory and causes crashes. > > This problem was caught by iotests case 245. > > Fixes: df2b7086f169239ebad5d150efa29c9bb6d4f820 > Signed-off-by: Kevin Wolf <kw...@redhat.com> > --- > block/qcow2.c | 29 +++++++++++++++++++++++++++++ > 1 file changed, 29 insertions(+)
Reviewed-by: Eric Blake <ebl...@redhat.com> -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org
