From patchwork Mon Feb 18 19:57:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sven Van Asbroeck X-Patchwork-Id: 1044299 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="nA7e/dfK"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 443F5b6qwGz9s9G for ; Tue, 19 Feb 2019 06:57:39 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726038AbfBRT5i (ORCPT ); Mon, 18 Feb 2019 14:57:38 -0500 Received: from mail-it1-f195.google.com ([209.85.166.195]:51750 "EHLO mail-it1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725535AbfBRT5i (ORCPT ); Mon, 18 Feb 2019 14:57:38 -0500 Received: by mail-it1-f195.google.com with SMTP id y184so823820itc.1; Mon, 18 Feb 2019 11:57:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=3ZPBl+NkmY1fFLUUIG+BLi/V1PJ5iahTFGc7kmz5Vho=; b=nA7e/dfKrMRn+KKUfxhZmpp6UjWq21+HZ2ZXFHM2ODbB8qT9IweiAh5zVdfOOtqYDN ybC7ZQLGNkcd6ithK1a1aOmr8+955A6x0Ge7HwBqS1brY2zZPdSBk/5h+mGT/PF9Kz7Y AVs396qQogGE2pEYsAXq5bjaUT7GWNRFa3oMObI0z9kGJ9S2qT9W76AJNR5w6UsS6zgG 7W7NE7/ckuq5R17YhY9YmQEa8IWTUiEC+XNiGVQIBodpcSNpXlafjlhhNSxhkk484wQc nVNE8UDM88Qkw6SECk5siNsmIwl2WE0eBWNx4m4bR2vsnMSZ+RqDosczwsk3toUKpcZ1 Bz+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=3ZPBl+NkmY1fFLUUIG+BLi/V1PJ5iahTFGc7kmz5Vho=; b=fCJGc8b0hsW3Eg+chggYiUmkretEG5VJgv9I1dvqRjf13Cy6bpND1iWBQUpQfHX3iH BNDMIvkxCOpGaWP6Kba1Yz7XhCQfYqGJOkBX5uHRPi7D8tGftMI35UsDI1wnIeeTx3yo ZS4jDz/WndgV+qgLXcz/8kANXltUWcLhktcLdl7Jp+yXJVW1Q1UsgTqu3+TP7FsiMSNy +O5dUjk2J+ppGzlyvtZ6limkreuOuGyIPF5HAr1v3MFImfIUKgKb6zx2XLP1LTAqnk5Y oJ1Ml2Z5O9Rs7R7O19vSLBK0VdVA4lr6KwjsBjWSaqlDfNUbKTApHUv1uek0T/mRa8ZQ TEXQ== X-Gm-Message-State: AHQUAuZVCgP63r0gzbAzFM/5uXA+B8zCPaVjSLsrh9sWBpJLAX6CpUof pWxYFEFLCeBtG9W1hF7sDeE= X-Google-Smtp-Source: AHgI3IYZkFVF8aDOkbWNuSSqBPM63lXCdeI1nZ9zoS9mK6JQbApIiG0crAtBgx00Pt83F12kxUt01g== X-Received: by 2002:a5d:859a:: with SMTP id f26mr14871701ioj.150.1550519857629; Mon, 18 Feb 2019 11:57:37 -0800 (PST) Received: from localhost.localdomain ([198.52.185.227]) by smtp.gmail.com with ESMTPSA id e141sm154400itc.40.2019.02.18.11.57.36 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 18 Feb 2019 11:57:37 -0800 (PST) From: Sven Van Asbroeck X-Google-Original-From: Sven Van Asbroeck To: Bjorn Helgaas Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Sinan Kaya , Frederick Lawler , Mika Westerberg , Keith Busch Subject: [PATCH] PCIE/PME: fix possible use-after-free on remove Date: Mon, 18 Feb 2019 14:57:30 -0500 Message-Id: <20190218195730.4975-1-TheSven73@gmail.com> X-Mailer: git-send-email 2.17.1 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org In remove(), ensure that the pme work cannot run after kfree() is called. Otherwise, this could result in a use-after-free. This issue was detected with the help of Coccinelle. Cc: Sinan Kaya Cc: Frederick Lawler Cc: Mika Westerberg Cc: Keith Busch Signed-off-by: Sven Van Asbroeck Reviewed-by: Mika Westerberg --- drivers/pci/pcie/pme.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c index 0dbcf429089f..87823f669ccc 100644 --- a/drivers/pci/pcie/pme.c +++ b/drivers/pci/pcie/pme.c @@ -427,9 +427,12 @@ static int pcie_pme_resume(struct pcie_device *srv) */ static void pcie_pme_remove(struct pcie_device *srv) { + struct pcie_pme_service_data *data = get_service_data(srv); + pcie_pme_suspend(srv); free_irq(srv->irq, srv); - kfree(get_service_data(srv)); + cancel_work_sync(&data->work); + kfree(data); } static int pcie_pme_runtime_suspend(struct pcie_device *srv)