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 410E0C4167B for ; Tue, 7 Nov 2023 12:43:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235243AbjKGMn2 (ORCPT ); Tue, 7 Nov 2023 07:43:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35906 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235315AbjKGMm4 (ORCPT ); Tue, 7 Nov 2023 07:42:56 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AC46C32B7B; Tue, 7 Nov 2023 04:30:23 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 05F77C433D9; Tue, 7 Nov 2023 12:30:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1699360223; bh=bDGQYFArKPvTWstkMjeVmNma192FojHGBFgTuORE/n4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=E6r0d8KC4ZIliDrp6GjH6Dp7oo/kpvFVuqA1DoZ2LopwlTfFY8J1Ft0Zm1EyhbqQx rWrEJmzlElrs8bJQrvJ1mg6kpho/134WhC05lFo6uvAk9BtvumS65Rt72KeLzka7a+ ffPQ1Hh9CHX2kDc7Zdbz4RQyJWUnVa21V4AL96KfYpQrHgWdF4+OhgpTQZqBbqQYjT FbM+Sj3s7uAoxkpWs86cUb5bSjvQ4F6Gzs7KDK7WDMJRcIcwB70WugBbRyqJqCXzPU xpAeXzLda2QmDalz7YxtCPLFDurpwvQ8p8Q5a+PUyogl7wth7daoc2KMfq+Z5ulIR+ IZ9YBoPP/93Gw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: "Stanley.Yang" , Tao Zhou , Alex Deucher , Sasha Levin , christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com, daniel@ffwll.ch, mario.limonciello@amd.com, Hawking.Zhang@amd.com, lijo.lazar@amd.com, candice.li@amd.com, le.ma@amd.com, shashank.sharma@amd.com, andrealmeid@igalia.com, srinivasan.shanmugam@amd.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.15 12/20] drm/amdgpu: Fix potential null pointer derefernce Date: Tue, 7 Nov 2023 07:29:06 -0500 Message-ID: <20231107122940.3762228-12-sashal@kernel.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231107122940.3762228-1-sashal@kernel.org> References: <20231107122940.3762228-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.137 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Stanley.Yang" [ Upstream commit 80285ae1ec8717b597b20de38866c29d84d321a1 ] The amdgpu_ras_get_context may return NULL if device not support ras feature, so add check before using. Signed-off-by: Stanley.Yang Reviewed-by: Tao Zhou Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 2cf49a32ac6c3..e60130653c54e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -5097,7 +5097,8 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev, * Flush RAM to disk so that after reboot * the user can read log and see why the system rebooted. */ - if (need_emergency_restart && amdgpu_ras_get_context(adev)->reboot) { + if (need_emergency_restart && amdgpu_ras_get_context(adev) && + amdgpu_ras_get_context(adev)->reboot) { DRM_WARN("Emergency reboot."); ksys_sync_helper(); -- 2.42.0