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 X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B458AC11F69 for ; Sat, 10 Jul 2021 02:38:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A0CF613D6 for ; Sat, 10 Jul 2021 02:38:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235040AbhGJClP (ORCPT ); Fri, 9 Jul 2021 22:41:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:58454 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235813AbhGJCjr (ORCPT ); Fri, 9 Jul 2021 22:39:47 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9D52161431; Sat, 10 Jul 2021 02:36:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625884572; bh=YBbsfupXMjTT6ifevQa5TsXdZ6/h/HIV/MLtHSlXhUo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wt1ne4q9poLvjDdDgdx6FTgn6C5duy8+Ku+iO9DjR5sAr8SCdz9dieYDJ6I2TFKCO //6XylwQhBmbb6s33M7u96mCnHOh0bkKTKbL/Xv/eNb45x60HztLUglag+DBJUZc6R 8HY1yspAj59532ZG9OXJ39L5F4Fbc3DWT6hfIYO9K0bn4rx8BNVvHGyKHJZ0xSOl61 voSyCSHs6vI1L8DDldA6fgt2cFB6ERkn+b0vmWK59TPZHTgweKpMA/OBkQSvizUct0 cAj3GjtCMppx8vOGBqd6M9Bx13F0NlhiR/JkIRxW7uwErHdweBIMI3eEs2TR9Qebcl +sqUVkiytq0bw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Christophe JAILLET , Greg Kroah-Hartman , Sasha Levin , linux-serial@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 06/26] tty: serial: 8250: serial_cs: Fix a memory leak in error handling path Date: Fri, 9 Jul 2021 22:35:44 -0400 Message-Id: <20210710023604.3172486-6-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210710023604.3172486-1-sashal@kernel.org> References: <20210710023604.3172486-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org From: Christophe JAILLET [ Upstream commit fad92b11047a748c996ebd6cfb164a63814eeb2e ] In the probe function, if the final 'serial_config()' fails, 'info' is leaking. Add a resource handling path to free this memory. Signed-off-by: Christophe JAILLET Link: https://lore.kernel.org/r/dc25f96b7faebf42e60fe8d02963c941cf4d8124.1621971720.git.christophe.jaillet@wanadoo.fr Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/tty/serial/8250/serial_cs.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/8250/serial_cs.c b/drivers/tty/serial/8250/serial_cs.c index 8106353ce7aa..38e8045a36cc 100644 --- a/drivers/tty/serial/8250/serial_cs.c +++ b/drivers/tty/serial/8250/serial_cs.c @@ -305,6 +305,7 @@ static int serial_resume(struct pcmcia_device *link) static int serial_probe(struct pcmcia_device *link) { struct serial_info *info; + int ret; dev_dbg(&link->dev, "serial_attach()\n"); @@ -319,7 +320,15 @@ static int serial_probe(struct pcmcia_device *link) if (do_sound) link->config_flags |= CONF_ENABLE_SPKR; - return serial_config(link); + ret = serial_config(link); + if (ret) + goto free_info; + + return 0; + +free_info: + kfree(info); + return ret; } static void serial_detach(struct pcmcia_device *link) -- 2.30.2