BUG: Bad page state in process Xorg  pfn:1c7f5
page:c138fea0 flags:40000000 count:0 mapcount:0 mapping:00002000 index:9378
Pid: 936, comm: Xorg Tainted: G    B      2.6.31-14-generic #48-Ubuntu
Call Trace:
 [<c056e41c>] ? printk+0x18/0x1c
 [<c01b731c>] bad_page+0xcc/0x120
 [<c01b78b6>] prep_new_page+0x26/0x120
 [<c01b7e2d>] get_page_from_freelist+0x1bd/0x360
 [<c01b8500>] __alloc_pages_nodemask+0xb0/0x120
 [<c01ca076>] do_anonymous_page+0x66/0x200
 [<c012d3cd>] ? kmap_atomic_prot+0xcd/0xf0
 [<c01cc460>] handle_mm_fault+0x330/0x380
 [<c01f4cfb>] ? vfs_ioctl+0x7b/0x90
 [<c0572cf8>] do_page_fault+0x148/0x380
 [<c0572bb0>] ? do_page_fault+0x0/0x380
 [<c0570be3>] error_code+0x73/0x80