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From: abe@j.cc.purdue.edu.UUCP
Newsgroups: comp.bugs.2bsd
Subject: Re: rlogin problem between Sun 3.2 and 2.9 BSD
Message-ID: <3383@j.cc.purdue.edu>
Date: Thu, 26-Feb-87 16:18:50 EST
Article-I.D.: j.3383
Posted: Thu Feb 26 16:18:50 1987
Date-Received: Sat, 28-Feb-87 07:59:54 EST
References: <162@lamont.UUCP>
Organization: Purdue University Computing Center
Lines: 25
Summary: rlogin to 2.9 causes dtom panic

In article <162@lamont.UUCP>, rbd@lamont.UUCP (Roger Davis) writes:
> 
>        ii) Attempting to rlogin from the PDP to a Sun
> 	   crashes the PDP about 75% of the time with a
> 	   "panic: dtom" message, and
> 	   succeeds the other 25% of the time.

There is a simple fix to sohasoutofband() in sys/socket.c that will
prevent one kind of dtom panic:

	sohasoutofband(so)
		struct socket *so;
	{
		mapinfo map;

wrong!		savemap(map);
		if (so->so_pgrp == 0)
			return;
right!		savemap(map);

Remove the savemap(map) call before the if/return and place it after them.
That removes the possibility of an unbalanced savemap/restoremap pair.

Vic Abell, abe@j.cc.purdue.edu
	   j.cc.purdue.edu!abe