linux-kernel - [PATCH] apparmor: Fix memleak in alloc

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Message-ID: <20221028123320.88132-1-xiujianfeng@huawei.com>
Date:   Fri, 28 Oct 2022 20:33:20 +0800
From:   Xiu Jianfeng <xiujianfeng@...wei.com>
To:     <john.johansen@...onical.com>, <paul@...l-moore.com>,
        <serge@...lyn.com>
CC:     <apparmor@...ts.ubuntu.com>,
        <linux-security-module@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] apparmor: Fix memleak in alloc_ns()

After changes in commit a1bd627b46d1 ("apparmor: share profile name on
replacement"), the hname member of struct aa_policy is not valid slab
object, but a subset of that, it can not be freed by kfree_sensitive(),
use aa_policy_destroy() to fix it.

Fixes: a1bd627b46d1 ("apparmor: share profile name on replacement")
Signed-off-by: Xiu Jianfeng <xiujianfeng@...wei.com>
---
 security/apparmor/policy_ns.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/apparmor/policy_ns.c b/security/apparmor/policy_ns.c
index 5c38563a6dcf..fd5b7afbcb48 100644
--- a/security/apparmor/policy_ns.c
+++ b/security/apparmor/policy_ns.c
@@ -132,7 +132,7 @@ static struct aa_ns *alloc_ns(const char *prefix, const char *name)
 	return ns;
 
 fail_unconfined:
-	kfree_sensitive(ns->base.hname);
+	aa_policy_destroy(&ns->base);
 fail_ns:
 	kfree_sensitive(ns);
 	return NULL;
-- 
2.17.1