linux-kernel - Re: [PATCH AUTOSEL 4.14 6/8] netfilter: ebtables: fix fortify warnings in size_entry

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Message-ID: <ZP7fj1LW3YLu2LrM@duo.ucw.cz>
Date:   Mon, 11 Sep 2023 11:36:15 +0200
From:   Pavel Machek <pavel@...x.de>
To:     Sasha Levin <sashal@...nel.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        "GONG, Ruiqi" <gongruiqi1@...wei.com>, GONG@...r.kernel.org,
        "Gustavo A . R . Silva" <gustavoars@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Florian Westphal <fw@...len.de>, pablo@...filter.org,
        kadlec@...filter.org, roopa@...dia.com, razor@...ckwall.org,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netfilter-devel@...r.kernel.org,
        coreteam@...filter.org, bridge@...ts.linux-foundation.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH AUTOSEL 4.14 6/8] netfilter: ebtables: fix fortify
 warnings in size_entry_mwt()

Hi!

> [ Upstream commit a7ed3465daa240bdf01a5420f64336fee879c09d ]
> 
> When compiling with gcc 13 and CONFIG_FORTIFY_SOURCE=y, the following
> warning appears:
> 
> In function ‘fortify_memcpy_chk’,
>     inlined from ‘size_entry_mwt’ at net/bridge/netfilter/ebtables.c:2118:2:
> ./include/linux/fortify-string.h:592:25: error: call to ‘__read_overflow2_field’
> declared with attribute warning: detected read beyond size of field (2nd parameter);
> maybe use struct_group()? [-Werror=attribute-warning]
>   592 |                         __read_overflow2_field(q_size_field, size);
>       |
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This is not queued for 4.19. Mistake?

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,        Managing Director: Erika Unter
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

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