linux-kernel - Re: How to lock current->signal->tty

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>] [day] [month] [year] [list]

Date:	Wed, 9 Aug 2006 00:01:06 -0400
From:	"Albert Cahalan" <acahalan@...il.com>
To:	sds@...ho.nsa.gov, alan@...rguk.ukuu.org.uk,
	linux-kernel@...r.kernel.org, davem@...hat.com,
	viro@....linux.org.uk
Subject: Re: How to lock current->signal->tty

Stephen Smalley writes:

> SELinux is just revalidating access to the tty when the task
> changes contexts upon execve, and resetting the tty if the
> task is no longer allowed to use it.  Likewise with the open
> file descriptors that would be inherited.  No clearing of the
> ttys of other tasks required as far as SELinux is concerned,
> although that might not fit with normal semantics.

If the process goes back to the old context after a second
execve or via special rights, it ought regain access to the tty.

(just block access instead of resetting the tty)
-
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/