From: Ye Bin <yebin10@huawei.com>
Date: Thu, 10 Nov 2022 14:45:39 +0000 (+0800)
Subject: ALSA: hda: fix potential memleak in 'add_widget_node'
X-Git-Tag: v5.15.79~42
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7140d7aaf93da6a665b454f91bb4dc6b1de218bd;p=platform%2Fkernel%2Flinux-rpi.git

ALSA: hda: fix potential memleak in 'add_widget_node'

commit 9a5523f72bd2b0d66eef3d58810c6eb7b5ffc143 upstream.

As 'kobject_add' may allocated memory for 'kobject->name' when return error.
And in this function, if call 'kobject_add' failed didn't free kobject.
So call 'kobject_put' to recycling resources.

Signed-off-by: Ye Bin <yebin10@huawei.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20221110144539.2989354-1-yebin@huaweicloud.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/sound/hda/hdac_sysfs.c b/sound/hda/hdac_sysfs.c
index 0d7771f..6b8d156 100644
--- a/sound/hda/hdac_sysfs.c
+++ b/sound/hda/hdac_sysfs.c
@@ -346,8 +346,10 @@ static int add_widget_node(struct kobject *parent, hda_nid_t nid,
 		return -ENOMEM;
 	kobject_init(kobj, &widget_ktype);
 	err = kobject_add(kobj, parent, "%02x", nid);
-	if (err < 0)
+	if (err < 0) {
+		kobject_put(kobj);
 		return err;
+	}
 	err = sysfs_create_group(kobj, group);
 	if (err < 0) {
 		kobject_put(kobj);