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Message-ID:	<55A62895.1000308@yahoo.no>
Date:	Wed, 15 Jul 2015 11:32:05 +0200
From:	"Gisle Vanem (gvanem AT yahoo DOT no) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
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To:	djgpp AT delorie DOT com
Subject:	Re: wat3222br3.zip crashes when viewing some web page
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Reply-To:	djgpp AT delorie DOT com

Ozkan Sezer [via djgpp AT delorie DOT com] wrote:

>> --- src/tcp_fsm.c_	2005-10-20 17:04:18.000000000 +0200
>> +++ src/tcp_fsm.c	2015-07-12 17:12:46.000000000 +0200
>> @@ -1060,7 +1060,7 @@
>>      * If it's before recv_next, we've seen it all before; if it's after
>>      * then the peer (or someone else) sent more than we said we could take.
>>      */
>> -  if ((unsigned)len - ldiff > s->adv_win)
>> +  if ((unsigned)len - ldiff > s->max_rx_data - s->rx_datalen)
>>     {
>>       TCP_TRACE (("tcp_ProcessData (%u): packet ends outside %lu/%lu\n",
>>                   __LINE__, s->recv_next, s->recv_next + s->adv_win));

> Gisle Vanem:  is the patch correct?

Seems so. I have briefly tested it and have seen no
ill effect. I assume it helped Mikulas in his test-case
(i.e. no more crashes).

I have added the 1st patch. The second is inside an
'#ifdef USE_NEW_TCP_REASM' section which is not active
yet. It should be, but I need to rethink all the TCP-
reassembly when and if SACK (Selective ACKnowledge [1])
gets implemented.

[1] https://tools.ietf.org/html/rfc2018

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