linux-kernel - [PATCH] selinux: add __randomize_layout to selinux_audit

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Date:   Wed, 18 May 2022 09:21:37 +0000
From:   "GONG, Ruiqi" <gongruiqi1@...wei.com>
To:     Paul Moore <paul@...l-moore.com>,
        Stephen Smalley <stephen.smalley.work@...il.com>,
        Eric Paris <eparis@...isplace.org>,
        "Kees Cook" <keescook@...omium.org>
CC:     <selinux@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Wang Weiyang <wangweiyang2@...wei.com>,
        Xiu Jianfeng <xiujianfeng@...wei.com>, <gongruiqi1@...wei.com>
Subject: [PATCH] selinux: add __randomize_layout to selinux_audit_data

Randomize the layout of struct selinux_audit_data as suggested in [1],
since it contains a pointer to struct selinux_state, an already
randomized strucure.

[1]: https://github.com/KSPP/linux/issues/188

Signed-off-by: GONG, Ruiqi <gongruiqi1@...wei.com>
---
 security/selinux/include/avc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/selinux/include/avc.h b/security/selinux/include/avc.h
index 2b372f98f2d7..5525b94fd266 100644
--- a/security/selinux/include/avc.h
+++ b/security/selinux/include/avc.h
@@ -53,7 +53,7 @@ struct selinux_audit_data {
 	u32 denied;
 	int result;
 	struct selinux_state *state;
-};
+} __randomize_layout;
 
 /*
  * AVC operations
-- 
2.17.1