Description of problem:
I'm running f18beta in a f14 qemu-kvm.  After running "xrandr -s 800x600", the display does seem to reduce in size, but the f18beta immediately locks up/freezes.

The following is trace output from the console:

[71708.843896] ------------[ cut here ]------------
[71708.844901] WARNING: at lib/list_debug.c:59 __list_del_entry+0xa1/0xd0()
[71708.846044] Hardware name: Bochs
[71708.846610] list_del corruption. prev->next should be ffff880039b0c050, but was e9e3ede9e3ede9e3
[71708.848084] Modules linked in: fuse ebtable_nat ebtables ipt_MASQUERADE nf_conntrack_netbios_ns nf_conntrack_broadcast ip6table_mangle ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables iptable_nat nf_nat iptable_mangle nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack bnep bluetooth nf_conntrack rfkill be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb4i cxgb4 cxgb3i cxgb3 mdio libcxgbi ib_iser rdma_cm ib_addr iw_cm ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi snd_intel8x0 snd_ac97_codec ac97_bus snd_seq snd_seq_device snd_pcm snd_page_alloc snd_timer snd virtio_net microcode virtio_balloon soundcore i2c_piix4 uinput cirrus drm_kms_helper ttm drm virtio_blk i2c_core
[71708.860369] Pid: 14012, comm: mate-settings-d Not tainted 3.6.7-5.fc18.x86_64 #1
[71708.861606] Call Trace:
[71708.862054]  [<ffffffff8105c8df>] warn_slowpath_common+0x7f/0xc0
[71708.863096]  [<ffffffff8105c9d6>] warn_slowpath_fmt+0x46/0x50
[71708.864067]  [<ffffffff812f0e71>] __list_del_entry+0xa1/0xd0
[71708.865015]  [<ffffffff81147885>] vma_prio_tree_remove+0xf5/0x130
[71708.866046]  [<ffffffff81159dc2>] __remove_shared_vm_struct.isra.24+0x52/0x80
[71708.867269]  [<ffffffff8115a1ae>] unlink_file_vma+0x4e/0x70
[71708.868212]  [<ffffffff81152d42>] free_pgtables+0xb2/0x130
[71708.869142]  [<ffffffff8115c812>] exit_mmap+0xb2/0x170
[71708.870000]  [<ffffffff81094f74>] ? __enqueue_entity+0x74/0x80
[71708.871018]  [<ffffffff81184351>] ? __khugepaged_exit+0xf1/0x110
[71708.872063]  [<ffffffff81059ce3>] mmput+0x83/0xf0
[71708.879348]  [<ffffffff810624c4>] exit_mm+0x104/0x130
[71708.880278]  [<ffffffff8106264a>] do_exit+0x15a/0x8c0
[71708.881208]  [<ffffffff810630ff>] do_group_exit+0x3f/0xa0
[71708.882191]  [<ffffffff81063177>] sys_exit_group+0x17/0x20
[71708.883200]  [<ffffffff8162b769>] system_call_fastpath+0x16/0x1b
[71708.884269] ---[ end trace a374a95d65efd238 ]---

Version-Release number of selected component (if applicable):
kernel-3.6.7-5.fc18.x86_64

How reproducible:
always

Steps to Reproduce:
1. run f18beta in virt-manager/qemu-kvm
2. type "xrandr -s 800x600"


Actual results:
freezes

Expected results:
resolution changes

Additional info: