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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 0CC9CC3A5A6 for ; Sun, 22 Sep 2019 19:15:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DB87320882 for ; Sun, 22 Sep 2019 19:15:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569179725; bh=QJorBsuu7/I+O7IoyuxkA/c3Do8nJw9lZYvwg/ZsupQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=aSJY2U2DBOiD6toEyu7LetMh0uooGt9EZMx1OrqU+KY7gyydC2tdZKgyUFasWjiCI cDDddjrmeddmPx1xdGB5cXbMlLBxVSflS0W4csce2ryC4khCdToK0T6uRR6Sm/aqs+ 4Wdhx1E6+y+FXQ/YITe7+DSlA+6Zi6FXznDgojxI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730768AbfIVTPU (ORCPT ); Sun, 22 Sep 2019 15:15:20 -0400 Received: from mail.kernel.org ([198.145.29.99]:58804 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2408215AbfIVS4h (ORCPT ); Sun, 22 Sep 2019 14:56:37 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1C6182190F; Sun, 22 Sep 2019 18:56:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569178596; bh=QJorBsuu7/I+O7IoyuxkA/c3Do8nJw9lZYvwg/ZsupQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0o0TmClmDwmtnUUkAGyd3VRzgCHsK0DHHLA20K02W/dqomsT0SQTyL7u8Z3mFo/NB n6438/R6Q/8XPfgTEM0VusS7mhAv2UKkgpO1SU9pNNcV5zPWArLm23HAOxG5KRAKxX iaK+9r0oc86uqRz8eBGuyPKWpDAabrAdy4tuOngU= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Wenwen Wang , "Rafael J . Wysocki" , Sasha Levin , linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 101/128] ACPI / PCI: fix acpi_pci_irq_enable() memory leak Date: Sun, 22 Sep 2019 14:53:51 -0400 Message-Id: <20190922185418.2158-101-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190922185418.2158-1-sashal@kernel.org> References: <20190922185418.2158-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Wenwen Wang [ Upstream commit 29b49958cf73b439b17fa29e9a25210809a6c01c ] In acpi_pci_irq_enable(), 'entry' is allocated by kzalloc() in acpi_pci_irq_check_entry() (invoked from acpi_pci_irq_lookup()). However, it is not deallocated if acpi_pci_irq_valid() returns false, leading to a memory leak. To fix this issue, free 'entry' before returning 0. Fixes: e237a5518425 ("x86/ACPI/PCI: Recognize that Interrupt Line 255 means "not connected"") Signed-off-by: Wenwen Wang Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- drivers/acpi/pci_irq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c index c576a6fe4ebb3..94ded9513c73b 100644 --- a/drivers/acpi/pci_irq.c +++ b/drivers/acpi/pci_irq.c @@ -462,8 +462,10 @@ int acpi_pci_irq_enable(struct pci_dev *dev) * No IRQ known to the ACPI subsystem - maybe the BIOS / * driver reported one, then use it. Exit in any case. */ - if (!acpi_pci_irq_valid(dev, pin)) + if (!acpi_pci_irq_valid(dev, pin)) { + kfree(entry); return 0; + } if (acpi_isa_register_gsi(dev)) dev_warn(&dev->dev, "PCI INT %c: no GSI\n", -- 2.20.1