linux-kernel - [PATCH 1/3] selinux: consistently clear cond

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Date:   Fri, 28 Jan 2022 21:28:56 +0100
From:   vbendel@...hat.com
To:     paul@...l-moore.com, stephen.smalley.work@...il.com,
        eparis@...isplace.org
Cc:     omosnace@...hat.com, selinux@...r.kernel.org,
        linux-kernel@...r.kernel.org, Vratislav Bendel <vbendel@...hat.com>
Subject: [PATCH 1/3] selinux: consistently clear cond_list on error paths

From: Vratislav Bendel <vbendel@...hat.com>

Currently there are two users of policydb->cond_list: cond_read_list()
and duplicate_policydb_cond_list(). On their error path one clears
->cond_list to NULL, but the other doesn't.
Make the behavior consistent by resetting ->cond_list to NULL in
cond_list_destroy(), which is called by both on the error path.

Signed-off-by: Vratislav Bendel <vbendel@...hat.com>
---
 security/selinux/ss/conditional.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/selinux/ss/conditional.c b/security/selinux/ss/conditional.c
index 2ec6e5cd25d9..1d0e5f326b62 100644
--- a/security/selinux/ss/conditional.c
+++ b/security/selinux/ss/conditional.c
@@ -152,6 +152,7 @@ static void cond_list_destroy(struct policydb *p)
 	for (i = 0; i < p->cond_list_len; i++)
 		cond_node_destroy(&p->cond_list[i]);
 	kfree(p->cond_list);
+	p->cond_list = NULL;
 }
 
 void cond_policydb_destroy(struct policydb *p)
@@ -441,7 +442,6 @@ int cond_read_list(struct policydb *p, void *fp)
 	return 0;
 err:
 	cond_list_destroy(p);
-	p->cond_list = NULL;
 	return rc;
 }
 
-- 
2.26.3