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 DF11FC46467 for ; Mon, 16 Jan 2023 16:25:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233057AbjAPQZp (ORCPT ); Mon, 16 Jan 2023 11:25:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41446 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232540AbjAPQZP (ORCPT ); Mon, 16 Jan 2023 11:25:15 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BABA02B0B7 for ; Mon, 16 Jan 2023 08:14:06 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 575EF61041 for ; Mon, 16 Jan 2023 16:14:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 69F13C433EF; Mon, 16 Jan 2023 16:14:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673885645; bh=HrwjVQla4aOqoFdGehGkcw3KMih8UyiyIA88yo2Wrck=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iCxmU67Ozvt1ytY7I3/+HIvGw3HwtJwGnFF5q4xOObCBlPAbEoicB742DPyp72aBm FTg8dMTTEG3e8AofVIJA1BEpMFpb/PWJItd8l3sJBFvrc5VYChX/mHa/v8XD0+Dd4Z UID1MWWmCy6887w8thYfla+SVbdw3VoANvOrAjM4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dan Carpenter , Alex Deucher , Sasha Levin Subject: [PATCH 5.4 131/658] amdgpu/pm: prevent array underflow in vega20_odn_edit_dpm_table() Date: Mon, 16 Jan 2023 16:43:39 +0100 Message-Id: <20230116154915.441995863@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154909.645460653@linuxfoundation.org> References: <20230116154909.645460653@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: Dan Carpenter [ Upstream commit d27252b5706e51188aed7647126e44dcf9e940c1 ] In the PP_OD_EDIT_VDDC_CURVE case the "input_index" variable is capped at 2 but not checked for negative values so it results in an out of bounds read. This value comes from the user via sysfs. Fixes: d5bf26539494 ("drm/amd/powerplay: added vega20 overdrive support V3") Signed-off-by: Dan Carpenter Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c index 947e4fa3c5e6..d499add3601a 100644 --- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c @@ -2894,7 +2894,8 @@ static int vega20_odn_edit_dpm_table(struct pp_hwmgr *hwmgr, data->od8_settings.od8_settings_array; OverDriveTable_t *od_table = &(data->smc_state_table.overdrive_table); - int32_t input_index, input_clk, input_vol, i; + int32_t input_clk, input_vol, i; + uint32_t input_index; int od8_id; int ret; -- 2.35.1