From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <910d40a791450c3c2eb43cc7c99ba7e0@cs.cmu.edu>
To: 9fans@cse.psu.edu
From: David Swasey <swasey@cs.cmu.edu>
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Subject: [9fans] u9fs bug
Date: Fri, 23 May 2003 11:51:55 -0400
Topicbox-Message-UUID: b7e163c0-eacb-11e9-9e20-41e7f4b1d025

In u9fs.c, gid2user() may return nil but groupchange() assumes g is
always non-nil.  This causes u9fs to seg fault when, for example,
creating a file in a directory that has a group id not defined in
/etc/group.  A simple fix is to have groupchange() handle the case
when g is nil:

/sys/src/cmd/unix/u9fs/u9fs.c:1320 a u9fs.c:1321,1322
> 	if(g == nil)
> 		return -1;

-dave