linux-kernel - AT_EXECFN not useful

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 14 Aug 2008 10:15:29 -0700
From:	Ulrich Drepper <drepper@...hat.com>
To:	Linux Kernel <linux-kernel@...r.kernel.org>,
	John Reiser <jreiser@...Wagon.com>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: AT_EXECFN not useful

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

I've just removed the support for AT_EXECFN again from glibc.  The
information isn't useful because the path name isn't normalized.  I.e.,
it's not the actual binary path if symlinks are followed during the
resolution.  This makes it unusable for the $ORIGIN handling.  This is
on top of the problem with relative paths.

Unless somebody has another use case where this is useful I suggest
removing AT_EXECFN support again.  It's just superfluous work and memory
use.

Of course I wouldn't object to a real implementation which always gives
me the full, normalized path name of the executable...

- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (GNU/Linux)

iEYEARECAAYFAkikaDEACgkQ2ijCOnn/RHSFvACgoWYhqrfJZfRe4ypFUQQR9soJ
km8AnRchCWP+irhGcgoSzd2S8iYQi7zm
=E4tz
-----END PGP SIGNATURE-----
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/