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



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
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