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Re: [Qemu-devel] [PATCH] net: rocker: set limit to DMA buffer size


From: Jason Wang
Subject: Re: [Qemu-devel] [PATCH] net: rocker: set limit to DMA buffer size
Date: Fri, 21 Oct 2016 09:33:46 +0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0



On 2016年10月12日 17:52, Jiri Pirko wrote:
Wed, Oct 12, 2016 at 11:10:55AM CEST, address@hidden wrote:
From: Prasad J Pandit <address@hidden>

Rocker network switch emulator has test registers to help debug
DMA operations. While testing host DMA access, a buffer address
is written to register 'TEST_DMA_ADDR' and its size is written to
register 'TEST_DMA_SIZE'. When performing TEST_DMA_CTRL_INVERT
test, if DMA buffer size was greater than 'INT_MAX', it leads to
an invalid buffer access. Limit the DMA buffer size to avoid it.

Reported-by: Huawei PSIRT <address@hidden>
Signed-off-by: Prasad J Pandit <address@hidden>
Reviewed-by: Jiri Pirko <address@hidden>

Applied, thanks.



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