From nobody Fri Dec 19 07:19:28 2025 Received: from cstnet.cn (smtp84.cstnet.cn [159.226.251.84]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 071B026ACB; Fri, 30 Aug 2024 13:43:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.84 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725025399; cv=none; b=mWubABkRshCEPA/RriqvRXQyzqhrHqgbSA46mdyDpQhB0/0InZKxuwsf4Jzes5uO/tuvhr8Vwvqoj0h8ZoS8hkNfvosiSTcQJGHf6lm6zOkdaxszkb8IK4kHuV364PSGbiTxdEwVFGoEnCFggfwFuuLj2petBBsxTrBynuD1W5Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725025399; c=relaxed/simple; bh=f1R0koMml7lKfyHh7RQ05dSO/br5e+PtMQqNKcmrDHc=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=iozq3BdkAfRXg+ulV5Nx3BFizTMvumil/10dpv2eqafkXWTsYiIIbqhovTE73SZfS11fPqdpuQhDMC/WFluNQw/tw3sYC7d83BTXExFKQUlh73hi6gW3N1r+D2rArDMoRhuEk4oWbdJNsYnxfmfLKvkBko3un3+MPJF/5q6Pc8I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.84 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from icess-ProLiant-DL380-Gen10.. (unknown [183.174.60.14]) by APP-05 (Coremail) with SMTP id zQCowAAnDzpmzNFmqgt9Cw--.39437S2; Fri, 30 Aug 2024 21:43:10 +0800 (CST) From: Ma Ke To: harry.wentland@amd.com, sunpeng.li@amd.com, Rodrigo.Siqueira@amd.com, alexander.deucher@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com, daniel@ffwll.ch, wenjing.liu@amd.com, hamza.mahfooz@amd.com, alvin.lee2@amd.com, jun.lei@amd.com, dillon.varone@amd.com, aurabindo.pillai@amd.com, moadhuri@amd.com Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Ma Ke , stable@vger.kernel.org Subject: [PATCH] drm/amd/display: Add null check before access structs in dcn32_enable_phantom_plane Date: Fri, 30 Aug 2024 21:43:02 +0800 Message-Id: <20240830134302.3440772-1-make24@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: zQCowAAnDzpmzNFmqgt9Cw--.39437S2 X-Coremail-Antispam: 1UD129KBjvJXoWrtFyftrykJF1fAr1fGrWktFb_yoW8Jryfpw 43Gayakw1DJrnFga9xJ3WjqFZxW3WvkFZ7KrZIywna9ayjyr93C3s8ur9xCrWUGFyjkw43 tF1IyrsrKF4qyrUanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUB214x267AKxVW5JVWrJwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26r4j6ryUM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26F4j 6r4UJwA2z4x0Y4vEx4A2jsIE14v26F4UJVW0owA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Gc CE3s1lnxkEFVAIw20F6cxK64vIFxWle2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xv F2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_JrI_JrylYx0Ex4A2jsIE14v26r1j6r 4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I 648v4I1lFIxGxcIEc7CjxVA2Y2ka0xkIwI1lc7CjxVAaw2AFwI0_GFv_Wryl42xK82IYc2 Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s02 6x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r4a6rW5MIIYrxkI7VAKI48JMIIF0x vE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF0xvE 42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6x kF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjTRil1vDUUUU X-CM-SenderInfo: ppdnvj2u6l2u1dvotugofq/ Content-Type: text/plain; charset="utf-8" In dcn32_enable_phantom_plane, we should better check null pointer before accessing various structs. Cc: stable@vger.kernel.org Fixes: 235c67634230 ("drm/amd/display: add DCN32/321 specific files for Dis= play Core") Signed-off-by: Ma Ke --- drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c= b/drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c index 969658313fd6..1d1b40d22f42 100644 --- a/drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c +++ b/drivers/gpu/drm/amd/display/dc/resource/dcn32/dcn32_resource.c @@ -1650,6 +1650,8 @@ static void dcn32_enable_phantom_plane(struct dc *dc, phantom_plane =3D prev_phantom_plane; else phantom_plane =3D dc_state_create_phantom_plane(dc, context, curr_pipe-= >plane_state); + if (!phantom_plane) + return; =20 memcpy(&phantom_plane->address, &curr_pipe->plane_state->address, sizeof= (phantom_plane->address)); memcpy(&phantom_plane->scaling_quality, &curr_pipe->plane_state->scaling= _quality, --=20 2.25.1