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 944DF17A589; Tue, 10 Sep 2024 10:15:18 +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=1725963318; cv=none; b=u4eBKRasfTzHAxdsuGAhqzj1IU0r2SuNJZULodDIwb55Wao9ndzJmZ6XkK4z7Wg4/gcKL/jA18yqDxNd1CS4jtemuqHoXCFO47MU6Vhx/z4Kf2LAzQxIspv6b5NHizS1qBW19bijM6qPdqrYsd1WezIzPpWHHiqlVZ3OBsjr0sQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725963318; c=relaxed/simple; bh=KGrTCApl2YCG/DslEmPKcz28liXL4W6S6C8to+cGXCU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=T2rQ2lT71RsZ4vzQBkNfWp6FG7x2cpx/cqYI2EZOkLDka40IBEig6Dqx8eIYkEpm/UK+bSNV7YKqonqSgBNNTV9M10aXx0OqWwVJbmtsFk4UQe9QP7jvMP3wQR/iYTr6dkmN4VxIRg1CvfWWdmys9lgMf236WfQDNneQH6bzzms= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=UkE/h2Yh; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="UkE/h2Yh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C9F28C4CEC3; Tue, 10 Sep 2024 10:15:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1725963318; bh=KGrTCApl2YCG/DslEmPKcz28liXL4W6S6C8to+cGXCU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UkE/h2Yh4paW3SVFezKBMNgY45+39QQQrFe7PqMfPDSdc+aAPrPaRbYjlQteqHnOG 8Az/23n5/lQxX8xHd7+wOLcCVQPog//t6PW0zmsF7PxkNr6kfJFhNhyrQL2U3kFPWh rBsg2jTGLsIvaCjSeIIT1bdazmYv66yJe+Sf8WYQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Harry Wentland , Tom Chung , Alex Hung , Daniel Wheeler , Alex Deucher , Sasha Levin Subject: [PATCH 5.15 017/214] drm/amd/display: Check gpio_id before used as array index Date: Tue, 10 Sep 2024 11:30:39 +0200 Message-ID: <20240910092559.476934583@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240910092558.714365667@linuxfoundation.org> References: <20240910092558.714365667@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ 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 dae8e489c8cf..a7c92c64490c 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