[PATCH 4.4 103/114] parisc: pdc_stable: Fix memory leak in pdcs_register_pathentries

From: Greg Kroah-Hartman
Date: Mon Jan 24 2022 - 13:57:17 EST


From: Miaoqian Lin <linmq006@xxxxxxxxx>

commit d24846a4246b6e61ecbd036880a4adf61681d241 upstream.

kobject_init_and_add() takes reference even when it fails.
According to the doc of kobject_init_and_add():

If this function returns an error, kobject_put() must be called to
properly clean up the memory associated with the object.

Fix memory leak by calling kobject_put().

Fixes: 73f368cf679b ("Kobject: change drivers/parisc/pdc_stable.c to use kobject_init_and_add")
Signed-off-by: Miaoqian Lin <linmq006@xxxxxxxxx>
Signed-off-by: Helge Deller <deller@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/parisc/pdc_stable.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/parisc/pdc_stable.c
+++ b/drivers/parisc/pdc_stable.c
@@ -992,8 +992,10 @@ pdcs_register_pathentries(void)
entry->kobj.kset = paths_kset;
err = kobject_init_and_add(&entry->kobj, &ktype_pdcspath, NULL,
"%s", entry->name);
- if (err)
+ if (err) {
+ kobject_put(&entry->kobj);
return err;
+ }

/* kobject is now registered */
write_lock(&entry->rw_lock);