On Tue, Feb 28, 2017 at 09:36:42PM +0100, Kevin Wolf wrote: > This adds assertions that ensure that the necessary write permissions > have been granted before someone attempts to write to a node. > > Signed-off-by: Kevin Wolf <kw...@redhat.com> > Acked-by: Fam Zheng <f...@redhat.com> > Reviewed-by: Max Reitz <mre...@redhat.com> > --- > block/io.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/block/io.c b/block/io.c > index 2592ca1..4c79745 100644 > --- a/block/io.c > +++ b/block/io.c > @@ -945,6 +945,8 @@ static int coroutine_fn > bdrv_co_do_copy_on_readv(BdrvChild *child, > size_t skip_bytes; > int ret; > > + assert(child->perm & (BLK_PERM_WRITE_UNCHANGED | BLK_PERM_WRITE));
This assertion is thrown in the libguestfs test suite. I filed a bug about it against the Fedora package: https://lists.gnu.org/archive/html/qemu-block/2017-02/msg01305.html Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v