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Re: kern/49390: Unsigned wraparound in tcp sequence number calculations on 64-bit machines
The following reply was made to PR kern/49390; it has been noted by GNATS.
From: Valery Ushakov <uwe%stderr.spb.ru@localhost>
Subject: Re: kern/49390: Unsigned wraparound in tcp sequence number
calculations on 64-bit machines
Date: Thu, 13 Aug 2020 06:22:15 +0300
Oops, looks like I forgot to reference this PR in the fix I've
committed a while ago:
RCS file: /cvsroot/src/sys/netinet/tcp_output.c,v
date: 2018-05-08 02:42:13 +0300; author: uwe; state: Exp; lines: +19 -8; commitid: q2ycosos011hhqBA;
Fix unsigned wraparound on window size calculations.
This is another instance where tp->rcv_adv - tp->rcv_nxt can wrap
around after successful zero-window probe from the peer. The first
one was fixed by chs@ in revision 1.112 on 2004-05-08.
While here, CSE and de-obfuscate the code a bit.
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