6.0_BETA: uvm_fault, kernfs_readdir

[Petar Bogdanovic <petar%smokva.net@localhost>]

Hi,

a pretty recent netbsd-6 kernel (date: 16.03., arch: amd64) just crashed
several times.  The bug seems reproducible and does not appear, when no
kernfs is involved:

        $ mount
        /dev/raid0a on / type ffs (log, NFS exported, local)
        kernfs on /kern type kernfs (local)

        $ sudo find / -name '*,v'
        /etc/mtree/special.local,v
        (...many more lines...)
        /var/backups/boot.cfg.current,v
        uvm_fault(0xfffffe8114c4dbd0, 0x0, 1) -> e
        fatal page fault in supervisor mode
        trap type 6 code 0 rip ffffffff804f4ceb cs 8 rflags 10297 cr2  0 cpl 0
        rsp fffffe80016077a0
        kernel: page fault trap, code=0
        Stopped in pid 847.1 (find) at  netbsd:kernfs_readdir+0x687:    movq
        7fb0b30e
        (%rip),%rdi
        db{1}> bt
        kernfs_readdir() at netbsd:kernfs_readdir+0x687
        VOP_READDIR() at netbsd:VOP_READDIR+0x65
        vn_readdir() at netbsd:vn_readdir+0xf6
        sys___getdents30() at netbsd:sys___getdents30+0x76
        syscall() at netbsd:syscall+0xc4

Is this a known issue?

Thanks,

                Petar Bogdanovic