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=-8.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 9DBAFC48BE1 for ; Thu, 20 Jun 2019 18:05:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7352A2089C for ; Thu, 20 Jun 2019 18:05:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561053932; bh=huCbm7xIVtdIpzIg6MzCsS/j5xW29H4dHlBqL6qEwP8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=19h4QkxWN4SYyFoan8Ezh9byFJvk8gTphz+aI+wSnVHIhIJx//9C5XjfIqa7q9jj4 YKda3z2ujBmjqKztCtwSXRs/GgF5THWRfm9w+Wz/dfMjFC1FyoZU1g8xTrWEmrOrh8 7UtmneQYOP6p4u3PkrZ0Eq3bvTP4m1lS0KtTGEqA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728059AbfFTSFb (ORCPT ); Thu, 20 Jun 2019 14:05:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:58852 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728057AbfFTSFa (ORCPT ); Thu, 20 Jun 2019 14:05:30 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3A8E8204FD; Thu, 20 Jun 2019 18:05:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561053929; bh=huCbm7xIVtdIpzIg6MzCsS/j5xW29H4dHlBqL6qEwP8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ez5B/0umEN3XJ6Ara6RB7NaVZWK7NbV4ZdENt4HKg3lHzD8LHZ4Y959EUk8h+Rzni ANaN+vvotcpP6fXXMVQCNBB6wPqbABTeiUakee9PlcT1cEUCSGa/fVWpaqhsLw0Pqz 3r5zvv+GF0lVdypmMKd8ewiR7QIV3jYOL9nhUTzc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Kangjie Lu , Aditya Pakki , Finn Thain , Rob Herring , Bartlomiej Zolnierkiewicz , Sasha Levin Subject: [PATCH 4.9 047/117] video: imsttfb: fix potential NULL pointer dereferences Date: Thu, 20 Jun 2019 19:56:21 +0200 Message-Id: <20190620174354.770070615@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190620174351.964339809@linuxfoundation.org> References: <20190620174351.964339809@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit 1d84353d205a953e2381044953b7fa31c8c9702d ] In case ioremap fails, the fix releases resources and returns -ENOMEM to avoid NULL pointer dereferences. Signed-off-by: Kangjie Lu Cc: Aditya Pakki Cc: Finn Thain Cc: Rob Herring Cc: Greg Kroah-Hartman [b.zolnierkie: minor patch summary fixup] Signed-off-by: Bartlomiej Zolnierkiewicz Signed-off-by: Sasha Levin --- drivers/video/fbdev/imsttfb.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/video/fbdev/imsttfb.c b/drivers/video/fbdev/imsttfb.c index 4363c64d74e8..4ef9dc94e813 100644 --- a/drivers/video/fbdev/imsttfb.c +++ b/drivers/video/fbdev/imsttfb.c @@ -1516,6 +1516,11 @@ static int imsttfb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) info->fix.smem_start = addr; info->screen_base = (__u8 *)ioremap(addr, par->ramdac == IBM ? 0x400000 : 0x800000); + if (!info->screen_base) { + release_mem_region(addr, size); + framebuffer_release(info); + return -ENOMEM; + } info->fix.mmio_start = addr + 0x800000; par->dc_regs = ioremap(addr + 0x800000, 0x1000); par->cmap_regs_phys = addr + 0x840000; -- 2.20.1