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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ADD92EB64D9 for ; Mon, 19 Jun 2023 10:42:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230043AbjFSKmU (ORCPT ); Mon, 19 Jun 2023 06:42:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47272 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232036AbjFSKmE (ORCPT ); Mon, 19 Jun 2023 06:42:04 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 003E013D for ; Mon, 19 Jun 2023 03:42:03 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 8AB6060B0D for ; Mon, 19 Jun 2023 10:42:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A066BC433C0; Mon, 19 Jun 2023 10:42:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687171323; bh=9RoSE9FixoUb3VxDeIaXna0OWvELECVEc//L0sQQbnM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VHGn4pYhzLiagCXcb6GTepsrjLaeZijMR9aaMWCcMuOHXTSZq77XRMWHWmhj3q1nc UbX2Rt/Z/G8I4a7mS071XVwV1yy7jRW0GzB/hJwxZGlz4p40OZRCtWjxcz3fhw9XzL r3HXL9lT8IFEuD19Mg07IqsoAn20BRus3g5L992Q= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Natalia Petrova , Lyude Paul , Sasha Levin Subject: [PATCH 4.19 40/49] drm/nouveau: add nv_encoder pointer check for NULL Date: Mon, 19 Jun 2023 12:30:18 +0200 Message-ID: <20230619102132.026205948@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230619102129.856988902@linuxfoundation.org> References: <20230619102129.856988902@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Natalia Petrova [ Upstream commit 55b94bb8c42464bad3d2217f6874aa1a85664eac ] Pointer nv_encoder could be dereferenced at nouveau_connector.c in case it's equal to NULL by jumping to goto label. This patch adds a NULL-check to avoid it. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 3195c5f9784a ("drm/nouveau: set encoder for lvds") Signed-off-by: Natalia Petrova Reviewed-by: Lyude Paul [Fixed patch title] Signed-off-by: Lyude Paul Link: https://patchwork.freedesktop.org/patch/msgid/20230512103320.82234-1-n.petrova@fintech.ru Signed-off-by: Sasha Levin --- drivers/gpu/drm/nouveau/nouveau_connector.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index c6d6ce9af2565..5783ffc6e5ebe 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -712,7 +712,8 @@ nouveau_connector_detect_lvds(struct drm_connector *connector, bool force) #endif nouveau_connector_set_edid(nv_connector, edid); - nouveau_connector_set_encoder(connector, nv_encoder); + if (nv_encoder) + nouveau_connector_set_encoder(connector, nv_encoder); return status; } -- 2.39.2