lkml.org 
[lkml]   [2020]   [May]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH v2] of: Fix a refcounting bug in __of_attach_node_sysfs()
The problem in this code is that if kobject_add() fails, then it should
call of_node_put(np) to drop the reference count. I've actually moved
the of_node_get(np) later in the function to avoid needing to do clean
up.

Fixes: 5b2c2f5a0ea3 ("of: overlay: add missing of_node_get() in __of_attach_node_sysfs")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
v2: move the of_node_get() instead of doing clean up. Also the v1 had a
confusing typo in the commit message.

drivers/of/kobj.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/of/kobj.c b/drivers/of/kobj.c
index c72eef988041..a32e60b024b8 100644
--- a/drivers/of/kobj.c
+++ b/drivers/of/kobj.c
@@ -134,8 +134,6 @@ int __of_attach_node_sysfs(struct device_node *np)
if (!name)
return -ENOMEM;

- of_node_get(np);
-
rc = kobject_add(&np->kobj, parent, "%s", name);
kfree(name);
if (rc)
@@ -144,6 +142,7 @@ int __of_attach_node_sysfs(struct device_node *np)
for_each_property_of_node(np, pp)
__of_add_property_sysfs(np, pp);

+ of_node_get(np);
return 0;
}

--
2.26.2
\
 
 \ /
  Last update: 2020-05-20 14:05    [W:2.601 / U:0.000 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site