Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 6/24/83; site utcsstat.UUCP
Path: utzoo!utcsstat!geoff
From: geoff@utcsstat.UUCP (Geoffrey Collyer)
Newsgroups: net.bugs.4bsd,net.unix-wizards
Subject: sendmail bug can cause loops
Message-ID: <1853@utcsstat.UUCP>
Date: Tue, 17-Apr-84 05:20:08 EST
Article-I.D.: utcsstat.1853
Posted: Tue Apr 17 05:20:08 1984
Date-Received: Tue, 17-Apr-84 05:43:00 EST
Organization: U. of Toronto, Canada
Lines: 12

On utcsstat (a V7 system), we occasionally found sendmails looping,
apparently parsing mail addresses.  This was caused by the system 3
DQS-11 RJE subsystem handing to sendmail as an address a garbled
argument, containing characters with their 0200 bits set, produced by
dereferencing a null pointer (RJE has been fixed).

I think sendmail can be fixed to prevent such loops by finding every
reference to a <ctype.h> macro and prepending a check for isascii(c).
I have not done so yet since fixing RJE has stopped the loops, but I
intend to.

Geoff Collyer, U. of Toronto