From: jannh@google.com (Jann Horn)
To: linux-security-module@vger.kernel.org
Subject: [PATCH v5 2/5] Smack: Prepare for PTRACE_MODE_SCHED
Date: Wed, 26 Sep 2018 23:30:35 +0200 [thread overview]
Message-ID: <CAG48ez3_XJYCURiCurDeCousGguGUdPego30j5+UF8FebWxUtA@mail.gmail.com> (raw)
In-Reply-To: <20180926203446.2004-3-casey.schaufler@intel.com>
On Wed, Sep 26, 2018 at 10:35 PM Casey Schaufler
<casey.schaufler@intel.com> wrote:
> A ptrace access check with mode PTRACE_MODE_SCHED gets called
> from process switching code. This precludes the use of audit,
> as the locking is incompatible. Don't do audit in the PTRACE_MODE_SCHED
> case.
>
> Signed-off-by: Casey Schaufler <casey.schaufler@intel.com>
> ---
> security/smack/smack_lsm.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
> index 340fc30ad85d..ffa95bcab599 100644
> --- a/security/smack/smack_lsm.c
> +++ b/security/smack/smack_lsm.c
> @@ -422,7 +422,8 @@ static int smk_ptrace_rule_check(struct task_struct *tracer,
> struct task_smack *tsp;
> struct smack_known *tracer_known;
>
> - if ((mode & PTRACE_MODE_NOAUDIT) == 0) {
> + if ((mode & PTRACE_MODE_NOAUDIT) == 0 &&
> + (mode & PTRACE_MODE_SCHED) == 0) {
If you ORed PTRACE_MODE_NOAUDIT into the flags when calling the
security hook, you could drop this patch, right?
next prev parent reply other threads:[~2018-09-26 21:30 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-26 20:34 [PATCH v5 0/5] LSM: Support ptrace sidechannel access checks Casey Schaufler
2018-09-26 20:34 ` [PATCH v5 1/5] AppArmor: Prepare for PTRACE_MODE_SCHED Casey Schaufler
2018-09-26 21:16 ` Jann Horn
2018-09-26 21:18 ` Jann Horn
2018-09-26 22:47 ` Schaufler, Casey
2018-09-26 20:34 ` [PATCH v5 2/5] Smack: " Casey Schaufler
2018-09-26 21:30 ` Jann Horn [this message]
2018-09-26 22:53 ` Schaufler, Casey
2018-09-26 22:58 ` Jann Horn
2018-10-04 7:47 ` Jiri Kosina
2018-10-04 11:36 ` Jann Horn
2018-10-16 11:44 ` Jiri Kosina
2018-09-26 20:34 ` [PATCH v5 3/5] SELinux: " Casey Schaufler
2018-09-27 15:50 ` Stephen Smalley
2018-09-27 16:23 ` Schaufler, Casey
2018-09-26 20:34 ` [PATCH v5 4/5] Capability: Complete PTRACE_MODE_SCHED Casey Schaufler
2018-09-26 21:26 ` Jann Horn
2018-09-26 22:24 ` Schaufler, Casey
2018-09-26 20:34 ` [PATCH v5 5/5] sidechannel: Linux Security Module for sidechannel Casey Schaufler
2018-09-27 21:45 ` James Morris
2018-09-27 22:39 ` Casey Schaufler
2018-09-27 22:47 ` James Morris
2018-09-27 23:19 ` Schaufler, Casey
2018-09-27 23:43 ` James Morris
2018-09-27 23:47 ` Jann Horn
2018-09-28 16:33 ` James Morris
2018-09-28 17:40 ` Schaufler, Casey
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