From: Solar Designer <solar@openwall.com>
To: kernel-hardening@lists.openwall.com
Subject: Re: [kernel-hardening] [RFC 2/5 v3] procfs: add hidepid= and gid= mount options
Date: Wed, 15 Jun 2011 18:22:44 +0400 [thread overview]
Message-ID: <20110615142244.GA32753@openwall.com> (raw)
In-Reply-To: <1308146286-12840-1-git-send-email-segoon@openwall.com>
Vasiliy,
On Wed, Jun 15, 2011 at 05:58:05PM +0400, Vasiliy Kulikov wrote:
> + if (pid->hide_pid &&
> + !ptrace_may_access(task, PTRACE_MODE_READ) &&
> + !in_group_p(pid->pid_gid)) {
I think ptrace_may_access() involves capable() in some cases (when
access would otherwise be denied). Thus, in order not to raise the used
privs flag unnecessarily, you need to check it last - after checking
in_group_p().
Thanks,
Alexander
next prev parent reply other threads:[~2011-06-15 14:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-15 13:58 [kernel-hardening] [RFC 2/5 v3] procfs: add hidepid= and gid= mount options Vasiliy Kulikov
2011-06-15 14:22 ` Solar Designer [this message]
2011-06-15 16:51 ` Vasiliy Kulikov
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