From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0337DC433EF for ; Mon, 13 Jun 2022 11:11:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352284AbiFMLLa (ORCPT ); Mon, 13 Jun 2022 07:11:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60142 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352008AbiFMLJO (ORCPT ); Mon, 13 Jun 2022 07:09:14 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 540E6338B2; Mon, 13 Jun 2022 03:35:21 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id B2450B80EAA; Mon, 13 Jun 2022 10:35:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 128BAC34114; Mon, 13 Jun 2022 10:35:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1655116511; bh=T4cvfR4WHCduCcFXKo/nqm80YevLxO60ECFJam+FNdw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Xi6nIHw2pjyhUFJVF3PKz+DAgn2OtmFdrrCd9H80n25dT93V3KWCDIef8sO98vYJp YNpbfjPA6lsx1X4m9RL98VCtebA0QV6/gk1AhOCuXpM2KCVHh/hSSioTQJR30B1jdh 9Va5InyHst9IxmnO4/D/qXoJXMirCrm8ujxvsIyc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Miaoqian Lin , Benjamin Tissoires , Jiri Kosina , Sasha Levin Subject: [PATCH 5.4 099/411] HID: elan: Fix potential double free in elan_input_configured Date: Mon, 13 Jun 2022 12:06:12 +0200 Message-Id: <20220613094931.649108885@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220613094928.482772422@linuxfoundation.org> References: <20220613094928.482772422@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Miaoqian Lin [ Upstream commit 1af20714fedad238362571620be0bd690ded05b6 ] 'input' is a managed resource allocated with devm_input_allocate_device(), so there is no need to call input_free_device() explicitly or there will be a double free. According to the doc of devm_input_allocate_device(): * Managed input devices do not need to be explicitly unregistered or * freed as it will be done automatically when owner device unbinds from * its driver (or binding fails). Fixes: b7429ea53d6c ("HID: elan: Fix memleak in elan_input_configured") Fixes: 9a6a4193d65b ("HID: Add driver for USB ELAN Touchpad") Signed-off-by: Miaoqian Lin Acked-by: Benjamin Tissoires Signed-off-by: Jiri Kosina Signed-off-by: Sasha Levin --- drivers/hid/hid-elan.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/hid/hid-elan.c b/drivers/hid/hid-elan.c index 0e8f424025fe..838673303f77 100644 --- a/drivers/hid/hid-elan.c +++ b/drivers/hid/hid-elan.c @@ -188,7 +188,6 @@ static int elan_input_configured(struct hid_device *hdev, struct hid_input *hi) ret = input_mt_init_slots(input, ELAN_MAX_FINGERS, INPUT_MT_POINTER); if (ret) { hid_err(hdev, "Failed to init elan MT slots: %d\n", ret); - input_free_device(input); return ret; } @@ -200,7 +199,6 @@ static int elan_input_configured(struct hid_device *hdev, struct hid_input *hi) hid_err(hdev, "Failed to register elan input device: %d\n", ret); input_mt_destroy_slots(input); - input_free_device(input); return ret; } -- 2.35.1