linux-kernel - [PATCH 4.9 013/128] efi/efivars: Add missing kobject

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Message-Id: <20200619141620.841961202@linuxfoundation.org>
Date:   Fri, 19 Jun 2020 16:31:47 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        亿一 <teroincn@...il.com>,
        Ard Biesheuvel <ardb@...nel.org>
Subject: [PATCH 4.9 013/128] efi/efivars: Add missing kobject_put() in sysfs entry creation error path

From: Ard Biesheuvel <ardb@...nel.org>

commit d8bd8c6e2cfab8b78b537715255be8d7557791c0 upstream.

The documentation provided by kobject_init_and_add() clearly spells out
the need to call kobject_put() on the kobject if an error is returned.
Add this missing call to the error path.

Cc: <stable@...r.kernel.org>
Reported-by: 亿一 <teroincn@...il.com>
Signed-off-by: Ard Biesheuvel <ardb@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/firmware/efi/efivars.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/firmware/efi/efivars.c
+++ b/drivers/firmware/efi/efivars.c
@@ -586,8 +586,10 @@ efivar_create_sysfs_entry(struct efivar_
 	ret = kobject_init_and_add(&new_var->kobj, &efivar_ktype,
 				   NULL, "%s", short_name);
 	kfree(short_name);
-	if (ret)
+	if (ret) {
+		kobject_put(&new_var->kobj);
 		return ret;
+	}
 
 	kobject_uevent(&new_var->kobj, KOBJ_ADD);
 	if (efivar_entry_add(new_var, &efivar_sysfs_list)) {