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Date: Mon, 16 Dec 2024 21:58:41 +0530
From: Vinod Koul <vkoul@kernel.org>
To: Arnd Bergmann <arnd@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
	Amadeusz =?utf-8?B?U8WCYXdpxYRza2k=?= <amadeuszx.slawinski@linux.intel.com>,
	Arnd Bergmann <arnd@arndb.de>, Yu Jiaoliang <yujiaoliang@vivo.com>,
	Peter Ujfalusi <peter.ujfalusi@linux.intel.com>,
	linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] ALSA: compress_offload: avoid 64-bit get_user()
Message-ID: <Z2BVOUAPIr0+q0Fu@vaman>
References: <20241216093410.377112-1-arnd@kernel.org>
 <20241216093410.377112-2-arnd@kernel.org>
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In-Reply-To: <20241216093410.377112-2-arnd@kernel.org>

On 16-12-24, 10:33, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> On some architectures, get_user() cannot read a 64-bit user variable:
> 
> arm-linux-gnueabi-ld: sound/core/compress_offload.o: in function `snd_compr_ioctl':
> compress_offload.c:(.text.snd_compr_ioctl+0x538): undefined reference to `__get_user_bad'
> 
> Use an equivalent copy_from_user() instead.

Acked-by: Vinod Koul <vkoul@kernel.org>

-- 
~Vinod