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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,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 4D5B1C04FF3 for ; Mon, 24 May 2021 15:46:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 28E8E61987 for ; Mon, 24 May 2021 15:46:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234070AbhEXPr1 (ORCPT ); Mon, 24 May 2021 11:47:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:58368 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233850AbhEXPmP (ORCPT ); Mon, 24 May 2021 11:42:15 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id EE5B3613F2; Mon, 24 May 2021 15:35:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621870501; bh=4HOjAGHMT/mLxQ+ZWKE9kSuVmLG91trN+tFHhEclEC8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XlhTKXvEQ6sZDZ4xQ/aP/+jBSk+HNRAgF3BIn8zaqVES8JSO4jsBic8wvqWLDwTRf XAZicm2wlwLAOfAdN6Hyh5C0vuBt55Zgu+dLDzi7mmNeGHoNzyNNh0gFQjU0GebaJy XY9gQv9Avo2Fgda89FApvn1zesM3z4L2waA4YX5g= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Kangjie Lu , Aditya Pakki , Ferenc Bakonyi , Bartlomiej Zolnierkiewicz Subject: [PATCH 4.19 25/49] Revert "video: hgafb: fix potential NULL pointer dereference" Date: Mon, 24 May 2021 17:25:36 +0200 Message-Id: <20210524152325.196185621@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210524152324.382084875@linuxfoundation.org> References: <20210524152324.382084875@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: Greg Kroah-Hartman commit 58c0cc2d90f1e37c4eb63ae7f164c83830833f78 upstream. This reverts commit ec7f6aad57ad29e4e66cc2e18e1e1599ddb02542. Because of recent interactions with developers from @umn.edu, all commits from them have been recently re-reviewed to ensure if they were correct or not. Upon review, this commit was found to be incorrect for the reasons below, so it must be reverted. It will be fixed up "correctly" in a later kernel change. This patch "looks" correct, but the driver keeps on running and will fail horribly right afterward if this error condition ever trips. So points for trying to resolve an issue, but a huge NEGATIVE value for providing a "fake" fix for the problem as nothing actually got resolved at all. I'll go fix this up properly... Cc: Kangjie Lu Cc: Aditya Pakki Cc: Ferenc Bakonyi Cc: Bartlomiej Zolnierkiewicz Fixes: ec7f6aad57ad ("video: hgafb: fix potential NULL pointer dereference") Cc: stable Link: https://lore.kernel.org/r/20210503115736.2104747-39-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman --- drivers/video/fbdev/hgafb.c | 2 -- 1 file changed, 2 deletions(-) --- a/drivers/video/fbdev/hgafb.c +++ b/drivers/video/fbdev/hgafb.c @@ -285,8 +285,6 @@ static int hga_card_detect(void) hga_vram_len = 0x08000; hga_vram = ioremap(0xb0000, hga_vram_len); - if (!hga_vram) - goto error; if (request_region(0x3b0, 12, "hgafb")) release_io_ports = 1;