From patchwork Tue Apr 26 08:21:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 567802 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 4CEC7C433EF for ; Tue, 26 Apr 2022 09:08:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346315AbiDZJLC (ORCPT ); Tue, 26 Apr 2022 05:11:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36994 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347914AbiDZJGW (ORCPT ); Tue, 26 Apr 2022 05:06:22 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 29C68B7163; Tue, 26 Apr 2022 01:47:16 -0700 (PDT) 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 ams.source.kernel.org (Postfix) with ESMTPS id D896CB81A2F; Tue, 26 Apr 2022 08:47:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 43000C385A4; Tue, 26 Apr 2022 08:47:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1650962833; bh=j2fWnchsZdK99kusfeZuzP3ZMiYvZ++rKX4EyqUwgpo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gb0yMholBiIrpCqKRS4FDthriJ/3x33ZU24qrM0Mgy5nUVxXVIjsKhFX7vH6fm6yy FnjE8zTgE5XHb6LjdlT/y5SQhYqwkdIqVpZQc1wmr5mqnd5DEWCyG6+q5J0bAx5uo6 y06NsctBDrDO63mAzLLCLYgXrar2AXV7Od7DuAgs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Xiaoke Wang , Abhinav Kumar , Rob Clark , Sasha Levin Subject: [PATCH 5.17 065/146] drm/msm/disp: check the return value of kzalloc() Date: Tue, 26 Apr 2022 10:21:00 +0200 Message-Id: <20220426081751.893023858@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220426081750.051179617@linuxfoundation.org> References: <20220426081750.051179617@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Xiaoke Wang [ Upstream commit f75e582b0c3ee8f0bddc2248cc8b9175f29c5937 ] kzalloc() is a memory allocation function which can return NULL when some internal memory errors happen. So it is better to check it to prevent potential wrong memory access. Signed-off-by: Xiaoke Wang Reviewed-by: Abhinav Kumar Link: https://lore.kernel.org/r/tencent_B3E19486FF39415098B572B7397C2936C309@qq.com Signed-off-by: Rob Clark Signed-off-by: Sasha Levin --- drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c index 5d2ff6791058..acfe1b31e079 100644 --- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c +++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c @@ -176,6 +176,8 @@ void msm_disp_snapshot_add_block(struct msm_disp_state *disp_state, u32 len, va_list va; new_blk = kzalloc(sizeof(struct msm_disp_state_block), GFP_KERNEL); + if (!new_blk) + return; va_start(va, fmt);