Yes, I think the limit to apply to xattr size in 9pfs is the same as the Linux xattr size limit, I will try to find this limit.
Thanks. On 2016-10-13 4:49 GMT+08:00 Eric Blake <ebl...@redhat.com> wrote: > On 10/12/2016 08:23 AM, Greg Kurz wrote: > > > > But in fact, I'm afraid we have a more serious problem here... size > > comes from the guest and could cause g_malloc() to abort if QEMU has > > reached some RLIMIT... we need to call g_try_malloc0() and return > > ENOMEM if the allocation fails. > > Even if it does not cause an ENOMEM failure right away, the guest can > also use this to chew up lots of host resources. It may also be worth > putting a reasonable cap at the maximum the guest can allocate, rather > than just trying to malloc every possible size. > > -- > Eric Blake eblake redhat com +1-919-301-3266 > Libvirt virtualization library http://libvirt.org > >
