linux-kernel - [PATCH] of: dynamic: fix memory leak related to properties of __of_node

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 13 Oct 2017 09:42:47 +0800
From:   alawang <alan.1.wang@...ia-sbell.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>
CC:     <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        alawang <alan.1.wang@...ia-sbell.com>
Subject: [PATCH] of: dynamic: fix memory leak related to properties of __of_node_dup

It is possible a node was dynamically allocated but without any
property. The properies will be got from devices and added to the
node when devices got connected.
When release this node, all properties of which had been moved to
deadprops.
In this case, the properties in the deadprops list are never
deallocated.

Signed-off-by: alawang <alan.1.wang@...ia-sbell.com>
---
 drivers/of/dynamic.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
index 301b6db..465d43b 100644
--- a/drivers/of/dynamic.c
+++ b/drivers/of/dynamic.c
@@ -335,6 +335,10 @@ void of_node_release(struct kobject *kobj)
 	if (!of_node_check_flag(node, OF_DYNAMIC))
 		return;
 
+	if (!prop) {
+		prop = node->deadprops;
+		node->deadprops = NULL;
+	}
 	while (prop) {
 		struct property *next = prop->next;
 		kfree(prop->name);
-- 
2.6.2