linux-kernel - [PATCH] yama: clarify ptrace_scope=2 in Yama documentation

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Message-ID: <20181002204722.GA9610@scapa.corsac.net>
Date:   Tue, 2 Oct 2018 22:47:23 +0200
From:   Yves-Alexis Perez <corsac@...sac.net>
To:     Kees Cook <keescook@...omium.org>,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     trivial@...nel.org
Subject: [PATCH] yama: clarify ptrace_scope=2 in Yama documentation

Current phrasing is ambiguous since it's unclear if attaching to a
children through PTRACE_TRACEME requires CAP_SYS_PTRACE. Rephrase the
sentence to make that clear.

Signed-off-by: Yves-Alexis Perez <corsac@...sac.net>
---
 Documentation/admin-guide/LSM/Yama.rst | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/admin-guide/LSM/Yama.rst b/Documentation/admin-guide/LSM/Yama.rst
index 13468ea696b7..d0a060de3973 100644
--- a/Documentation/admin-guide/LSM/Yama.rst
+++ b/Documentation/admin-guide/LSM/Yama.rst
@@ -64,8 +64,8 @@ The sysctl settings (writable only with ``CAP_SYS_PTRACE``) are:
     Using ``PTRACE_TRACEME`` is unchanged.
 
 2 - admin-only attach:
-    only processes with ``CAP_SYS_PTRACE`` may use ptrace
-    with ``PTRACE_ATTACH``, or through children calling ``PTRACE_TRACEME``.
+    only processes with ``CAP_SYS_PTRACE`` may use ptrace, either with
+    ``PTRACE_ATTACH`` or through children calling ``PTRACE_TRACEME``.
 
 3 - no attach:
     no processes may use ptrace with ``PTRACE_ATTACH`` nor via
-- 
2.19.0


-- 
Yves-Alexis