linux-kernel - Re: [PATCH] firmware: arm_ffa: Fix warning caused by export

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Message-Id: <172900612833.968325.8271791440801761945.b4-ty@arm.com>
Date: Tue, 15 Oct 2024 16:34:43 +0100
From: Sudeep Holla <sudeep.holla@....com>
To: linux-arm-kernel@...ts.infradead.org,
	Gavin Shan <gshan@...hat.com>
Cc: Sudeep Holla <sudeep.holla@....com>,
	linux-kernel@...r.kernel.org,
	shan.gavin@...il.com
Subject: Re: [PATCH] firmware: arm_ffa: Fix warning caused by export_uuid()

On Mon, 14 Oct 2024 10:47:24 +1000, Gavin Shan wrote:
> Run into build warning caused by export_uuid() where the UUID's
> length exceeds that of ffa_value_t::a2, as the following warning
> messages indicate.
> 
> In function ‘fortify_memcpy_chk’,
> inlined from ‘export_uuid’ at ./include/linux/uuid.h:88:2,
> inlined from ‘ffa_msg_send_direct_req2’ at drivers/firmware/arm_ffa/driver.c:488:2:
> ./include/linux/fortify-string.h:571:25: 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]
> 571 |                         __write_overflow_field(p_size_field, size);
>     |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> [...]

With the modifications to the commit message and subject, applied to
sudeep.holla/linux (for-next/ffa/fixes) partially as required, thanks!

[1/1] firmware: arm_ffa: Fix warning caused by export_uuid()
      https://git.kernel.org/sudeep.holla/c/b0798838418a
--
Regards,
Sudeep