Re: USB trouble with snapshot 2003-7-16

From: Ray <ray(at)cyth.net>
Date: Wed Jul 23 2003 - 08:24:38 EDT

On Tue, Jul 22, 2003 at 02:33:03PM -0700, Michael Coulter wrote:
> I'm seeing the same problem with a July 20th snapshot. I unplugged all the USB devices

I've also noticed the same problem, -current as of the last couple of days. (I'm currently running a July 7 kernel.) Following the directions in http://www.benzedrine.cx/crashreport.html, I got this objdump section:

/usr/src/sys/arch/i386/compile/GENERIC/../../../../arch/i386/i386/db_memrw.c:57

1. 8a 01 mov (%ecx),%al
2. 88 03 mov %al,(%ebx)
3. 41 inc %ecx
4. 43 inc %ebx
5. 89 d0 mov %edx,%eax
6. 4a dec %edx
7. 85 c0 test %eax,%eax 1b: 75 f3 jne 10 <db_read_bytes+0x10> 1d: 5b pop %ebx 1e: c9 leave 1f: c3 ret

And the trace:
...
dkcsum: wd0 matched BIOS disk 80
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302
kernel: page fault trap, code=0

Stopped at      0:      kernel: page fault trap, code=0
Stopped at      db_read_bytes+0x10:     movb    0(%ecx),%al

ddb> trace

db_read_bytes(0,1,d06659fc,d01c3741,0) at db_read_bytes+0x10
db_get_value(0,1,0,0,0) at db_get_value+0x1c
db_disasm(0,0,d01c3524,0,0) at db_disasm+0x20
db_print_loc_and_inst(0,d0665abc,d0665ad0,d02dc23e) at db_print_loc_and_inst+0x

32
db_trap(6,0,d0665b00,d02d07fd,1) at db_trap+0xc3 kdb_trap(6,0,d0665b68,5b1e2000) at kdb_trap+0xc1 trap() at trap+0x1b9
--- trap (number 6) ---
(null)(10,10,40,d055a540,d0665c48) at 0
Bad frame pointer: 0xd0665bcc
ddb>

-Ray- Received on Wed Jul 23 08:48:29 2003