[Panic] Removing of the Palm during select syscall causes panic

[Oleg Sidorkin]

On Sat, Mar 08, 2008, Kostik Belousov wrote:
> On Sat, Mar 08, 2008 at 02:01:51AM +0300, Oleg Sidorkin wrote:
> > Hello,
> >
> > I'm running 7.0-Stable on the ASUS P5K-VM + Intel Q6600 box.
> > If Palm device is disconnected after synchronization, system crashes with
> > following stacktrace:
> >
> > #0  doadump () at pcpu.h:194
> > #1  0x0000000000000004 in ?? ()
> > #2  0xffffffff802bea49 in boot (howto=260)
> > at /usr/src/sys/kern/kern_shutdown.c:409
> > #3  0xffffffff802bee4d in panic (fmt=0x104 <Address 0x104 out of bounds>)
> > at /usr/src/sys/kern/kern_shutdown.c:563
> > #4  0xffffffff804ccc84 in trap_fatal (frame=0xffffff0041595350,
> > eva=18446742974491038824) at /usr/src/sys/amd64/amd64/trap.c:724
> > #5  0xffffffff804cd055 in trap_pfault (frame=0xffffffffaf7607d0,
> > usermode=0) at /usr/src/sys/amd64/amd64/trap.c:641
> > #6  0xffffffff804cd998 in trap (frame=0xffffffffaf7607d0)
> > at /usr/src/sys/amd64/amd64/trap.c:410
> > #7  0xffffffff804b35fe in calltrap ()
> > at /usr/src/sys/amd64/amd64/exception.S:169
> > #8  0xffffffff8028d842 in giant_poll (dev=0xffffff000ddf6600, events=64,
> > td=0xffffff0041595350) at /usr/src/sys/kern/kern_conf.c:385
> > #9  0xffffffff8025474e in devfs_poll_f (fp=Variable "fp" is not
> > available. ) at /usr/src/sys/fs/devfs/devfs_vnops.c:845
> > #10 0xffffffff802f61f6 in kern_select (td=0xffffff0041595350, nd=11,
> > fd_in=0x7fffffbfea90, fd_ou=0x0, fd_ex=0x0, tvp=Variable "tvp" is not
> > available.
> > ) at file.h:277
> > #11 0xffffffff802f6611 in select (td=0xffffff0041595350,
> > uap=0xffffffffaf760be0) at /usr/src/sys/kern/sys_generic.c:663
> > #12 0xffffffff804cd2d7 in syscall (frame=0xffffffffaf760c70)
> > at /usr/src/sys/amd64/amd64/trap.c:852
> > #13 0xffffffff804b380b in Xfast_syscall ()stable at freebsd.org
> > at /usr/src/sys/amd64/amd64/exception.S:290
> > #14 0x0000000804579d6c in ?? ()
> > Previous frame inner to this frame (corrupt stack?)
> >
> > Does anyone have any ideas?
>
> I posted the patch several days ago, see
> http://lists.freebsd.org/pipermail/freebsd-current/2008-March/084076.html

I applied this patch and it seems working for me. I removed device few times 
and there were no panics. Thanks.