From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B482A1A256A; Thu, 1 Aug 2024 00:33:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722472397; cv=none; b=LfAfo16mYnGxMcZmNB+FDDINtpTv2p30WLvDBXKw6N5JMao4XlSOXd3yCL5NdPxtqNB6GAvcK2JJnPNGptT4prnJ5QZMnj0aPKHb0KjEPMVlYKuQzfVP7x9jKU6o/LFRVvns8nLMSj6t7NUZ6hTpRkyjg4otFeaVrAtMS/2UeW8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722472397; c=relaxed/simple; bh=yyIy12MuIvwSP1zwHXQiXi9ByeNiR9pxRihShyI6+ck=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Do/VIowkaOEFCLwRduTS6PdRoqRuQugY3ZCeDfVwPjVrRE6GvjbOhFnx/nI+8sVon3MMwumAbjpBnIpupevfAHwi+KYTBq+BAK4L2DN303aApP8uDKDjr90BJkPvbTHBhk+XIpSnLK44wnfpP/UqgvYkRtkaQlBqEjxCkHpeZQQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=W68kasZU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="W68kasZU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CF36BC4AF0C; Thu, 1 Aug 2024 00:33:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722472397; bh=yyIy12MuIvwSP1zwHXQiXi9ByeNiR9pxRihShyI6+ck=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=W68kasZU1SQCezkOuysJGTVDQ9dExKo4+VCgt+0TZ6jUpElPNQMEwDKzFEqGWXMu9 ZzeT8Owk23GSSjj2x0I1eYWbRb2BRLZNC1pLCCkZ3mbMadXEYpiQAXFvRNrzIFgk6D 0IwxZ+06vzobbs+/72Jp70p+e0uiMbQ/R6gkMzN51kR8alPLuturpVrSbZ129brPU5 WV9oxyjPIY7Kb9d6Zu+vmyNiBgkT1s6P9K0rUPGebSsyZjP2QM56jUVs3GbhXeI6wV qSxtkvl/iVrFXRZpnSXijx2cLEFXLoudH2R3ZwIMScqp+qQGmdjTsoqo7ALwGzol8a nbGTBgEHuJ5DA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jesse Zhang , Jesse Zhang , Tim Huang , Alex Deucher , Sasha Levin , kenneth.feng@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com, daniel@ffwll.ch, samasth.norway.ananda@oracle.com, electrodeyt@gmail.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.15 05/47] drm/amd/pm: fix the Out-of-bounds read warning Date: Wed, 31 Jul 2024 20:30:55 -0400 Message-ID: <20240801003256.3937416-5-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240801003256.3937416-1-sashal@kernel.org> References: <20240801003256.3937416-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.164 Content-Transfer-Encoding: 8bit From: Jesse Zhang [ Upstream commit 12c6967428a099bbba9dfd247bb4322a984fcc0b ] using index i - 1U may beyond element index for mc_data[] when i = 0. Signed-off-by: Jesse Zhang Reviewed-by: Tim Huang Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c index f503e61faa600..cc3b62f733941 100644 --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c @@ -73,8 +73,9 @@ static int atomctrl_retrieve_ac_timing( j++; } else if ((table->mc_reg_address[i].uc_pre_reg_data & LOW_NIBBLE_MASK) == DATA_EQU_PREV) { - table->mc_reg_table_entry[num_ranges].mc_data[i] = - table->mc_reg_table_entry[num_ranges].mc_data[i-1]; + if (i) + table->mc_reg_table_entry[num_ranges].mc_data[i] = + table->mc_reg_table_entry[num_ranges].mc_data[i-1]; } } num_ranges++; -- 2.43.0