linux-kernel - Re: [PATCH] dmaengine: dmatest: Remove use of VLAs

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Date:   Mon, 9 Apr 2018 18:48:14 -0400
From:   Sinan Kaya <okaya@...eaurora.org>
To:     Laura Abbott <labbott@...hat.com>,
        Vinod Koul <vinod.koul@...el.com>,
        Dan Williams <dan.j.williams@...el.com>
Cc:     dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-hardening@...ts.openwall.com,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH] dmaengine: dmatest: Remove use of VLAs

On 4/9/2018 5:06 PM, Laura Abbott wrote:
> +			/* dst_cnt can't be more than u8 */
> +			dma_addr_t dma_pq[255];

This is 2k stack space on 64 bit architectures. Isn't that a lot?

-- 
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.