From 23d8c33472a5a8765df340909766063765cf2e00 Mon Sep 17 00:00:00 2001
From: Zhen Lei <thunder.leizhen@huawei.com>
Date: Tue, 6 Aug 2024 14:51:13 +0800
Subject: [PATCH] selinux: fix potential counting error in
avc_add_xperms_decision()
commit 379d9af3f3da2da1bbfa67baf1820c72a080d1f1 upstream.
The count increases only when a node is successfully added to
the linked list.
Cc: stable@vger.kernel.org
Fixes: fa1aa143ac4a ("selinux: extended permissions for ioctls")
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Acked-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
security/selinux/avc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index 9a43af0ebd7de..8984ba92676db 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -332,12 +332,12 @@ static int avc_add_xperms_decision(struct avc_node *node,
{
struct avc_xperms_decision_node *dest_xpd;
- node->ae.xp_node->xp.len++;
dest_xpd = avc_xperms_decision_alloc(src->used);
if (!dest_xpd)
return -ENOMEM;
avc_copy_xperms_decision(&dest_xpd->xpd, src);
list_add(&dest_xpd->xpd_list, &node->ae.xp_node->xpd_head);
+ node->ae.xp_node->xp.len++;
return 0;
}
--
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