From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: Stanimir Varbanov <stanimir.varbanov@linaro.org>,
Andy Gross <agross@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org
Subject: Re: [PATCH][next] media: venus: hfi_cmds.h: Replace one-element array with flexible-array member
Date: Wed, 3 Mar 2021 19:42:12 -0600 [thread overview]
Message-ID: <20210304014212.GA43221@embeddedor> (raw)
In-Reply-To: <20210210225720.GA13710@embeddedor>
Hi all,
Friendly ping: who can take this, please?
Thanks
--
Gustavo
On Wed, Feb 10, 2021 at 04:57:20PM -0600, Gustavo A. R. Silva wrote:
> There is a regular need in the kernel to provide a way to declare having
> a dynamically sized set of trailing elements in a structure. Kernel code
> should always use “flexible array members”[1] for these cases. The older
> style of one-element or zero-length arrays should no longer be used[2].
>
> Use flexible-array member in struct hfi_sys_set_property_pkt instead of
> one-element array.
>
> Also, this helps with the ongoing efforts to enable -Warray-bounds and
> fix the following warnings:
>
> drivers/media/platform/qcom/venus/hfi_cmds.c: In function ‘pkt_sys_coverage_config’:
> drivers/media/platform/qcom/venus/hfi_cmds.c:57:11: warning: array subscript 1 is above array bounds of ‘u32[1]’ {aka ‘unsigned int[1]’} [-Warray-bounds]
> 57 | pkt->data[1] = mode;
> | ~~~~~~~~~^~~
>
> [1] https://en.wikipedia.org/wiki/Flexible_array_member
> [2] https://www.kernel.org/doc/html/v5.9/process/deprecated.html#zero-length-and-one-element-arrays
>
> Link: https://github.com/KSPP/linux/issues/79
> Link: https://github.com/KSPP/linux/issues/109
> Build-tested-by: kernel test robot <lkp@intel.com>
> Link: https://lore.kernel.org/lkml/602416da.iZqae7Dbk7nyl6OY%25lkp@intel.com/
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
> ---
> drivers/media/platform/qcom/venus/hfi_cmds.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/media/platform/qcom/venus/hfi_cmds.h b/drivers/media/platform/qcom/venus/hfi_cmds.h
> index 83705e237f1c..327ed90a2788 100644
> --- a/drivers/media/platform/qcom/venus/hfi_cmds.h
> +++ b/drivers/media/platform/qcom/venus/hfi_cmds.h
> @@ -68,7 +68,7 @@ struct hfi_sys_release_resource_pkt {
> struct hfi_sys_set_property_pkt {
> struct hfi_pkt_hdr hdr;
> u32 num_properties;
> - u32 data[1];
> + u32 data[];
> };
>
> struct hfi_sys_get_property_pkt {
> --
> 2.27.0
>
next prev parent reply other threads:[~2021-03-04 1:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-10 22:57 [PATCH][next] media: venus: hfi_cmds.h: Replace one-element array with flexible-array member Gustavo A. R. Silva
2021-03-04 1:42 ` Gustavo A. R. Silva [this message]
2021-05-11 15:44 ` Gustavo A. R. Silva
2021-05-12 11:37 ` Stanimir Varbanov
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