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Net work bug. More info.

To: "David S. Miller" <davem@xxxxxxxxxx>, kuznet@xxxxxxxxxxxxx, netdev@xxxxxxxxxxx, linux-net@xxxxxxxxxxxxxxx, ak@xxxxxx, pekkas@xxxxxxxxxx, "Cress, Andrew R" <andrew.r.cress@xxxxxxxxx>, mark Orvek <morvek@xxxxxxxxxx>, Tim Anderson <tanderson@xxxxxxxxxx>, mhuth@xxxxxxxxxx, dfarnsworth@xxxxxxxxxx, minyard@xxxxxxxxxx
Subject: Net work bug. More info.
From: george anzinger <george@xxxxxxxxxx>
Date: Thu, 20 Jun 2002 15:05:18 -0700
Organization: Monta Vista Software
Sender: owner-netdev@xxxxxxxxxxx
We have been looking more closely at the failure.  Attached is a gdb log...  As 
turns out, the failure is actually one level lower than
tcp_v4_destroy_sock() in __kfree_skb().  It attempts to call a destructor which 
has a
bogus address.  The failing instruction is the call *(reg).

tcp_writequeue_purge(sk)-> tcp_free_skb(sk, skb)-> __kfree_skb()

The attached log has the sk and the "bad" skb as rendered by gdb.
-- 
George Anzinger   george@xxxxxxxxxx
High-res-timers:  http://sourceforge.net/projects/high-res-timers/
Real time sched:  http://sourceforge.net/projects/rtsched/
Preemption patch: http://www.kernel.org/pub/linux/kernel/people/rml

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