firmware: dmi-sysfs: Fix memory leak in dmi_sysfs_register_handle

stable inclusion
from stable-v5.10.122
commit 985706bd3bbeffc8737bc05965ca8d24837bc7db
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5W6OE

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=985706bd3bbeffc8737bc05965ca8d24837bc7db

--------------------------------

[ Upstream commit 660ba678 ]

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 this issue by calling kobject_put().

Fixes: 948af1f0 ("firmware: Basic dmi-sysfs support")
Signed-off-by: NMiaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220511071421.9769-1-linmq006@gmail.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: NWei Li <liwei391@huawei.com>

drivers/firmware/dmi-sysfs.c

@@ -603,7 +603,7 @@ static void __init dmi_sysfs_register_handle(const struct dmi_header *dh,
 				    "%d-%d", dh->type, entry->instance);
 
 	if (*ret) {
-		kfree(entry);
+		kobject_put(&entry->kobj);
 		return;
 	}