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

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@xxxxxxxxxxx
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.

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