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,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,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 0925BC282C3 for ; Thu, 24 Jan 2019 19:58:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C1E6E218D2 for ; Thu, 24 Jan 2019 19:58:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548359938; bh=PbuYTl6HP/E5kvEcRqZZ44HQzxnmZmjCFYy5lVRHhF4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=IG3UH4CKKVzzNlAmivoCTs4VDbaD4r0KkSWJCENNvBp3kxJLurmRd1rKXYM7PwIoO c/jtI0o3Dni5oSCQgA+aPeR7lgdyotHCFNy3ET1DkH+LLgRUqlEMuDPqW3R2j5aDdt TY1YIAxGx92L7HPpyrr0cN8ZBc0GsOHIpk0QxlfU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732128AbfAXTeJ (ORCPT ); Thu, 24 Jan 2019 14:34:09 -0500 Received: from mail.kernel.org ([198.145.29.99]:33914 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732123AbfAXTeI (ORCPT ); Thu, 24 Jan 2019 14:34:08 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 CC46A218D4; Thu, 24 Jan 2019 19:34:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548358447; bh=PbuYTl6HP/E5kvEcRqZZ44HQzxnmZmjCFYy5lVRHhF4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bA/9r3xlIoNx+XsJ+KWJ9F3S0H3goj+TpL9yZXPizJMjxr1nXRFYtsKuze2AtAr0t ShqnF8yvL0Yorf6Wonh6ATQ6+iI0x4P2gfZ5vTPR09gm5ar9een0cqzGAFQa8gbHbT 5GfXOfusCMrw6orVrSM72uSYd9n1FPamA+pPgxtg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nicholas Kazlauskas , David Francis , Leo Li , Alex Deucher , Sasha Levin Subject: [PATCH 4.19 012/106] drm/amd/display: Guard against null stream_state in set_crc_source Date: Thu, 24 Jan 2019 20:19:29 +0100 Message-Id: <20190124190207.162371320@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190124190206.342411005@linuxfoundation.org> References: <20190124190206.342411005@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore 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 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit f41a895026b8cb6f765190de7d2e7bc3ccbbd183 ] [Why] The igt@kms_plane@pixel-format-pipe tests can create a sequence where stream_state is NULL during amdgpu_dm_crtc_set_crc_source which results in a null pointer dereference. [How] Guard against stream_state being NULL before accessing its fields. This doesn't fix the root cause of the issue so a DRM_ERROR is generated to still fail the tests. Signed-off-by: Nicholas Kazlauskas Reviewed-by: David Francis Acked-by: Leo Li Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c index 9bfb040352e9..6a6d977ddd7a 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c @@ -60,6 +60,11 @@ int amdgpu_dm_crtc_set_crc_source(struct drm_crtc *crtc, const char *src_name, return -EINVAL; } + if (!stream_state) { + DRM_ERROR("No stream state for CRTC%d\n", crtc->index); + return -EINVAL; + } + /* When enabling CRC, we should also disable dithering. */ if (source == AMDGPU_DM_PIPE_CRC_SOURCE_AUTO) { if (dc_stream_configure_crc(stream_state->ctx->dc, -- 2.19.1