Re: in[46]_cksum problems

[Paul Goyette <paul%whooppee.com@localhost>]

On Tue, 22 Apr 2008, M Graff wrote:

> BTW, I can crash my NetBSD 4.99.60 kernel on my laptop by doing "ntpdc
> -p" it seems, with an in_cksum crash, saying something about a too-short
> mbuf.
>
> I do not use pf, but I might have ipf enabled.

I have ipf enabled on one of my boxes, and it runs "ntpdc -p" just fine:

zippy:paul {101} ipfstat
bad packets:            in 0    out 0
 IPv6 packets:          in 0 out 0
 input packets:         blocked 0 passed 1042021 nomatch 75340 counted 0 short 0
output packets:         blocked 0 passed 953867 nomatch 78751 counted 0 short 0
 input packets logged:  blocked 0 passed 0
output packets logged:  blocked 0 passed 0
 packets logged:        input 0 output 0
 log failures:          input 0 output 0
fragment state(in):     kept 0  lost 0  not fragmented 0
fragment state(out):    kept 0  lost 0  not fragmented 0
packet state(in):       kept 0  lost 0
packet state(out):      kept 0  lost 0
ICMP replies:   0       TCP RSTs sent:  0
Invalid source(in):     0
Result cache hits(in):  966681  (out):  875116
IN Pullups succeeded:   622     failed: 0
OUT Pullups succeeded:  1182    failed: 0
Fastroute successes:    0       failures:       0
TCP cksum fails(in):    0       (out):  0
IPF Ticks:      367973
Packet log flags set: (0)
        none
zippy:paul {102} ntpdc -p
     remote           local      st poll reach  delay   offset    disp
=======================================================================
*hydrogen.cert.u 66.92.186.133    2 1024  377 0.03444 -0.000158 0.13670
=otc2.psu.edu    66.92.186.133    2 1024  377 0.11324 -0.002917 0.13655
=lain.ziaspace.c 66.92.186.133   16 1024    0 0.00000  0.000000 3.99217
=ntp-1.cns.vt.ed 66.92.186.133    2 1024  377 0.11063 -0.003997 0.12184
=clock-b.develoo 66.92.186.133    2 1024  377 0.03079  0.002705 0.12183
zippy:paul {103}


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