kern/122331: panic's on KDE-launches (but only in WPA Wifi area)

[John Baldwin]

On Monday 15 September 2008 06:24:14 pm Matthias Apitz wrote:
> El día Monday, September 15, 2008 a las 04:08:06PM -0400, John Baldwin 
escribió:
> 
> > > > Can you go to frame 7 in kgdb and 'p *fdp'?
> > > 
> > > (kgdb) frame 7
> > > #7  0xc0788b98 in kern_select (td=0xc49d5630, nd=9, fd_in=0x298ad840, 
> > >     fd_ou=0x298ad9c4, fd_ex=0x298adb48, tvp=0x0) at filedesc.h:136
> > > 		return (fd < 0 || fd >= fdp->fd_nfiles ? NULL : fdp->fd_ofiles[fd]);
> > > (kgdb) p *fdp
> > > Variable "fdp" is not available.
> > > (kgdb) 
> > 
> > If 'td' is available then you can do 'p *td->td_proc->p_fd'
> 
> (kgdb) frame 7
> #7  0xc0788b98 in kern_select (td=0xc49d5630, nd=9, fd_in=0x298ad840, 
>     fd_ou=0x298ad9c4, fd_ex=0x298adb48, tvp=0x0) at filedesc.h:136
> 136             return (fd < 0 || fd >= fdp->fd_nfiles ? NULL :
> fdp->fd_ofiles[fd]);
> (kgdb) p td
> $7 = (struct thread *) 0xc49d5630
> (kgdb) p *td->td_proc->p_fd
> $8 = {fd_ofiles = 0x0, fd_ofileflags = 0x0, fd_cdir = 0x0, 

Well, fd_ofiles being NULL here is really odd.  It's also odd that you have no 
current directory.  Because fd_nfiles is 20, fd_ofiles should be pointing to 
the static file descriptor array.  Off the top of my head I don't see how 
this is happening.  It might help if you can narrow down exactly what WPA 
operation you are doing that causes the panic.

-- 
John Baldwin