Subject: Re: kern/35278: veriexec sometimes feeds user va to log(9)
To: None <kern-bug-people@netbsd.org, gnats-admin@netbsd.org,>
From: Elad Efrat <elad@NetBSD.org>
List: netbsd-bugs
Date: 12/20/2006 09:40:02
The following reply was made to PR kern/35278; it has been noted by GNATS.
From: Elad Efrat <elad@NetBSD.org>
To: YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>
Cc: gnats-bugs@NetBSD.org
Subject: Re: kern/35278: veriexec sometimes feeds user va to log(9)
Date: Wed, 20 Dec 2006 11:37:14 +0200
YAMAMOTO Takashi wrote:
>> wouldn't that mean changes to either namei() api and/or struct nameidata
>> abi?
> yes.
then I'd propose to add this to struct nameidata:
char *ni_pathname;
and this to NDINIT():
(ndp)->ni_pathname = NULL;
and namei() to store the pathname in 'ni_pathname' if it's not NULL. so
callers that want the path can just:
nd.ni_pathname = PNBUF_GET();
and later free it. there's probably a better way to do this (without
risking memory leaks) but I'm not familiar with namei() internals.
for the meantime, I think we should use the patch I posted, at least for
4.0, until we decide how to handle this otherwise.
-e.