From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 3AFF118A925; Thu, 8 Aug 2024 10:47:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723114040; cv=none; b=NmAwUQ6tcDArjjvA00iiMfKUgg8ruFlaPnkk6xB/joPdN8vozBNL5DPC7tQmwFP1SG5cde932zcdUcJj3n1S/pMh4B71Fu9DvaUmUlgPQnU46uMHieqS7rjIHJmg+DrZjn+1I62RODe7OVOLkOE9FjeOg6PXXDkXmtgvA/xBvt4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723114040; c=relaxed/simple; bh=6J7iUTSqUnagTCsbz80DBqXWM+nKMfWg0brM0KqfaHc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Ui5kcuwxzob7j3+Z8O6iRb/hG5LFssyWewKW/XXSaoaW2c5DqGhPuyUSsnRFqS9fhJMkk8KcSUHBUopv5LMacjjykCgcdY9K/Wt3jBkuKzJfDsHL+3oC1iwlL1FuoS6CGOB4+0gYhUpKyb0UQrqhTw3RBuR7xXgOwEMk4zjPbtw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=ZJRqzNtz; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="ZJRqzNtz" Received: from [192.168.88.20] (91-156-87-48.elisa-laajakaista.fi [91.156.87.48]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 5368B8D0; Thu, 8 Aug 2024 12:46:22 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1723113982; bh=6J7iUTSqUnagTCsbz80DBqXWM+nKMfWg0brM0KqfaHc=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ZJRqzNtzg+d6fDcQqmAyOEbfNyr93GitWKJIJzWiHt7ccoh59MULtccuxDwgBejd9 1yrhZs2VgUCCXi0q2XmIFsuylen6edeHHUxw2Gs+g6VE4ggFA9eaGRh1w150w+36h5 IfAUacmfqyEfBqeWERIN6pYkNjNvBRMkqabzxUJU= Message-ID: <2d87f6dc-41c4-4642-a672-2fd5ab7927c6@ideasonboard.com> Date: Thu, 8 Aug 2024 13:47:13 +0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] drm: omapdrm: Add missing check for alloc_ordered_workqueue To: Ma Ke Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, daniel@ffwll.ch, laurent.pinchart@ideasonboard.com References: <20240808061336.2796729-1-make24@iscas.ac.cn> Content-Language: en-US From: Tomi Valkeinen Autocrypt: addr=tomi.valkeinen@ideasonboard.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 08/08/2024 09:13, Ma Ke wrote: > As it may return NULL pointer and cause NULL pointer dereference. Add check > for the return value of alloc_ordered_workqueue. > > Cc: stable@vger.kernel.org > Fixes: 2f95bc6d324a ("drm: omapdrm: Perform initialization/cleanup at probe/remove time") > Signed-off-by: Ma Ke > --- > drivers/gpu/drm/omapdrm/omap_drv.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c > index 6598c9c08ba1..94a57f0d1c08 100644 > --- a/drivers/gpu/drm/omapdrm/omap_drv.c > +++ b/drivers/gpu/drm/omapdrm/omap_drv.c > @@ -695,6 +695,10 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev) > soc = soc_device_match(omapdrm_soc_devices); > priv->omaprev = soc ? (uintptr_t)soc->data : 0; > priv->wq = alloc_ordered_workqueue("omapdrm", 0); > + if (!priv->wq) { > + ret = -ENOMEM; > + goto err_alloc_workqueue; > + } > > mutex_init(&priv->list_lock); > INIT_LIST_HEAD(&priv->obj_list); > @@ -753,6 +757,7 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev) > drm_mode_config_cleanup(ddev); > omap_gem_deinit(ddev); > destroy_workqueue(priv->wq); > +err_alloc_workqueue: > omap_disconnect_pipelines(ddev); > drm_dev_put(ddev); > return ret; Thanks, I'll pick this up to drm-misc. Tomi