linux-kernel - Re: [PATCH v1 0/9] drivers: hv: dxgkrnl: Driver overview

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Date:   Fri, 4 Feb 2022 16:31:17 -0800
From:   Iouri Tarassov <iourit@...ux.microsoft.com>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        wei.liu@...nel.org, linux-hyperv@...r.kernel.org,
        linux-kernel@...r.kernel.org, spronovo@...rosoft.com,
        gregkh@...uxfoundation.org
Subject: Re: [PATCH v1 0/9] drivers: hv: dxgkrnl: Driver overview


On 1/25/2022 4:27 PM, Nathan Chancellor wrote:
> Hi Iouri,
>
> On Wed, Jan 12, 2022 at 03:39:13PM -0800, Iouri Tarassov wrote:
> > 
> drivers/hv/dxgkrnl/dxgvmbus.c: In function ‘dxgvmb_send_query_alloc_residency’:
> drivers/hv/dxgkrnl/dxgvmbus.c:147:16: warning: array subscript ‘struct dxgvmbusmsg[0]’ is partly outside array bounds of ‘struct dxgvmbusmsgres[1]’ [-Warray-bounds]
>    147 |         if (msg->hdr && (char *)msg->hdr != msg->msg_on_stack)
>        |             ~~~^~~~~
> drivers/hv/dxgkrnl/dxgvmbus.c:1882:31: note: while referencing ‘msg’
>   1882 |         struct dxgvmbusmsgres msg = {.hdr = NULL};
>        |                               ^~~

Hi Nathan,

I fixed the issue with the ioctls array.

Regarding the warning above, it looks like a compiler error. I do not 
see where the out of bounds access is.
I tried GCC-11 version 11.2.0 and this warning is not there.

Thanks

Iouri