page fault in nfs_readdir/nfs_bioread

["Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>]

while running a cpdup to a nfs server (linux)

#15 0xc03527a7 in calltrap () at 
/usr/src/sys/platform/pc32/i386/exception.s:785
#16 0xe048de99 in nfs_bioread (vp=0xec44a5e8, uio=0xe816fc58, ioflag=0)
    at /usr/src/sys/vfs/nfs/nfs_bio.c:680
#17 0xe04a483f in nfs_readdir (ap=0xe816fbf4) at 
/usr/src/sys/vfs/nfs/nfs_vnops.c:2246
#18 0xc02402bc in vop_readdir (ops=0xdff7d730, vp=0xec44a5e8, 
uio=0xe816fc58, cred=0xe062e618,
    eofflag=0xe816fc4c, ncookies=0x0, cookies=0x0) at 
/usr/src/sys/kern/vfs_vopops.c:569

(kgdb) fra 16
#16 0xe048de99 in nfs_bioread (vp=0xec44a5e8, uio=0xe816fc58, ioflag=0)
    at /usr/src/sys/vfs/nfs/nfs_bio.c:680
680                                 dp = (struct nfs_dirent *)cpos;
(kgdb) p cpos
$1 = 0xce3c1000 <Address 0xce3c1000 out of bounds>
(kgdb) p epos
$2 = 0xce3c1f44 <Address 0xce3c1f44 out of bounds>
(kgdb) p bp->b_data
$3 = 0xce3c0000 "�205�a"
(kgdb) p bp->b_data + boff
$4 = 0xce3c0f44 "�205�a"

kernel core on leaf in ~corecode/crash

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