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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1C1D9C3DA7F for ; Thu, 1 Aug 2024 00:37:09 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C94EA10E837; Thu, 1 Aug 2024 00:37:08 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="CNC4MY/r"; dkim-atps=neutral Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by gabe.freedesktop.org (Postfix) with ESMTPS id E2F7C10E837; Thu, 1 Aug 2024 00:37:07 +0000 (UTC) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id F37BBCE1764; Thu, 1 Aug 2024 00:37:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 536EFC4AF0C; Thu, 1 Aug 2024 00:37:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722472625; bh=1D1azyMO/AXJRSxn65ynbs/u2AQ4meR2oYzI//XDx+8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CNC4MY/rLmW7t9NPSW0U10Bc1EUzkrGyHo5S5N+ImtT23OSeh+EyvhJ/7HDEwekwu JXsV/nobxk3JB3JWP7Ak/s0Obvu8VVzSB20fF2CWfNAWY9qC2XRSZstGC+xK6T7nuT appZv+8PDpjdIl7UcgtiprMKxEv9tWuM3Y0o4mh9tZBpMRwx9gOp0r59B4/mFML0ec YSGUf4f4jsEpdiMLo2o4Z4Fhg2hKJQaQn0LyClQvrcN8hBOHJw5yxuoZjegXtPpIJ/ O6gkbsRdEGdXEKixPENFVcGOJr3vGf2BR3lqcrgph876hNvXxDISeU8Kw3gGSbxMTs nXlANlB5VBcRA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Alex Hung , Harry Wentland , Tom Chung , Daniel Wheeler , Alex Deucher , Sasha Levin , sunpeng.li@amd.com, Rodrigo.Siqueira@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com, daniel@ffwll.ch, hersenxs.wu@amd.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.10 05/38] drm/amd/display: Check gpio_id before used as array index Date: Wed, 31 Jul 2024 20:35:11 -0400 Message-ID: <20240801003643.3938534-5-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240801003643.3938534-1-sashal@kernel.org> References: <20240801003643.3938534-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.10.223 Content-Transfer-Encoding: 8bit X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" From: Alex Hung [ Upstream commit 2a5626eeb3b5eec7a36886f9556113dd93ec8ed6 ] [WHY & HOW] GPIO_ID_UNKNOWN (-1) is not a valid value for array index and therefore should be checked in advance. This fixes 5 OVERRUN issues reported by Coverity. Reviewed-by: Harry Wentland Acked-by: Tom Chung Signed-off-by: Alex Hung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c b/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c index dae8e489c8cf4..a7c92c64490c5 100644 --- a/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c +++ b/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c @@ -241,6 +241,9 @@ static bool is_pin_busy( enum gpio_id id, uint32_t en) { + if (id == GPIO_ID_UNKNOWN) + return false; + return service->busyness[id][en]; } @@ -249,6 +252,9 @@ static void set_pin_busy( enum gpio_id id, uint32_t en) { + if (id == GPIO_ID_UNKNOWN) + return; + service->busyness[id][en] = true; } @@ -257,6 +263,9 @@ static void set_pin_free( enum gpio_id id, uint32_t en) { + if (id == GPIO_ID_UNKNOWN) + return; + service->busyness[id][en] = false; } @@ -265,7 +274,7 @@ enum gpio_result dal_gpio_service_lock( enum gpio_id id, uint32_t en) { - if (!service->busyness[id]) { + if (id != GPIO_ID_UNKNOWN && !service->busyness[id]) { ASSERT_CRITICAL(false); return GPIO_RESULT_OPEN_FAILED; } @@ -279,7 +288,7 @@ enum gpio_result dal_gpio_service_unlock( enum gpio_id id, uint32_t en) { - if (!service->busyness[id]) { + if (id != GPIO_ID_UNKNOWN && !service->busyness[id]) { ASSERT_CRITICAL(false); return GPIO_RESULT_OPEN_FAILED; } -- 2.43.0