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Date: Wed, 22 Apr 2015 11:45:21 +1000
From: Lawrence Stewart <lstewart@freebsd.org>
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To: Peter Holm <peter@holm.cc>, net@freebsd.org
Subject: Re: panic: SACK scoreboard must not be empty
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Hi Peter,

On 04/15/15 21:04, Peter Holm wrote:
> Seen during i386 stress tests.
> 
> db_trace_self_wrapper(c11e20fc,0,c11b79d4,1eb,e47578e0,...) at db_trace_self_wrapper+0x2a/frame 0xe47578b0
> kdb_backtrace(c139e637,2,c120851d,e4757984,e4757940,...) at kdb_backtrace+0x2d/frame 0xe4757918
> vpanic(c155b86a,100,c120851d,e4757984,e4757984,...) at vpanic+0x11d/frame 0xe4757954
> kassert_panic(c120851d,0,8,164,16,...) at kassert_panic+0xe6/frame 0xe4757978
> tcp_sack_doack(e047d900,e4757a48,e9eeab30,5f8,c15a9298,...) at tcp_sack_doack+0x405/frame 0xe47579f0
> tcp_do_segment(df801720,e047d900,40,0,0,...) at tcp_do_segment+0x21c2/frame 0xe4757aa0
> tcp_input(e4757bec,e4757be8,6,0,e4757be8,...) at tcp_input+0xfbc/frame 0xe4757ba0
> ip_input(e1cb5800,0,c11f6228,2f0,45,...) at ip_input+0x17c/frame 0xe4757c0c
> swi_net(c1c25880,c11d6fed,54f,8f6da840,c8a209c8,...) at swi_net+0x1a3/frame 0xe4757c4c
> intr_event_execute_handlers(c156a310,c8a20980,c11d6fed,54f,0,...) at intr_event_execute_handlers+0xdb/frame 0xe4757c74
> ithread_loop(c88d4f50,e4757ce8,c11d6d7c,3dc,0,...) at ithread_loop+0x87/frame 0xe4757cac
> fork_exit(c0b2c9d0,c88d4f50,e4757ce8) at fork_exit+0x7e/frame 0xe4757cd4
> fork_trampoline() at fork_trampoline+0x8/frame 0xe4757cd4
> 
> Details:
> https://people.freebsd.org/~pho/stress/log/kostik794.txt
> 

>From the looks of the log, you don't have a core?

Cheers,
Lawrence