linux-kernel - Re: [PATCH] HID: hyperv: avoid struct memcpy overrun warning

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Message-Id: <168897796090.315593.7282926562695249988.b4-ty@kernel.org>
Date:   Mon, 10 Jul 2023 10:32:40 +0200
From:   Benjamin Tissoires <bentiss@...nel.org>
To:     Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Arnd Bergmann <arnd@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
        Paulo Miguel Almeida <paulo.miguel.almeida.rodenas@...il.com>,
        Michael Kelley <mikelley@...rosoft.com>,
        Dawei Li <set_pte_at@...look.com>,
        Yang Yingliang <yangyingliang@...wei.com>,
        Thomas Weißschuh <linux@...ssschuh.net>,
        linux-hyperv@...r.kernel.org, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] HID: hyperv: avoid struct memcpy overrun warning

On Wed, 05 Jul 2023 16:02:24 +0200, Arnd Bergmann wrote:
> A previous patch addressed the fortified memcpy warning for most
> builds, but I still see this one with gcc-9:
> 
> In file included from include/linux/string.h:254,
>                  from drivers/hid/hid-hyperv.c:8:
> In function 'fortify_memcpy_chk',
>     inlined from 'mousevsc_on_receive' at drivers/hid/hid-hyperv.c:272:3:
> include/linux/fortify-string.h:583:4: error: call to '__write_overflow_field' declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Werror=attribute-warning]
>   583 |    __write_overflow_field(p_size_field, size);
>       |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> [...]

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/hid/hid.git (for-6.5/upstream-fixes), thanks!

[1/1] HID: hyperv: avoid struct memcpy overrun warning
      https://git.kernel.org/hid/hid/c/5f151364b1da

Cheers,
-- 
Benjamin Tissoires <bentiss@...nel.org>