[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <ZNOGa02ymvkTAXPD@vergenet.net>
Date: Wed, 9 Aug 2023 14:28:27 +0200
From: Simon Horman <horms@...nel.org>
To: "GONG, Ruiqi" <gongruiqi@...weicloud.com>
Cc: Pablo Neira Ayuso <pablo@...filter.org>,
Jozsef Kadlecsik <kadlec@...filter.org>,
Florian Westphal <fw@...len.de>,
Roopa Prabhu <roopa@...dia.com>,
Nikolay Aleksandrov <razor@...ckwall.org>,
Kees Cook <keescook@...omium.org>,
"Gustavo A . R . Silva" <gustavoars@...nel.org>,
netfilter-devel@...r.kernel.org, coreteam@...filter.org,
netdev@...r.kernel.org, linux-hardening@...r.kernel.org,
linux-kernel@...r.kernel.org,
Wang Weiyang <wangweiyang2@...wei.com>,
Xiu Jianfeng <xiujianfeng@...wei.com>, gongruiqi1@...wei.com
Subject: Re: [PATCH v3] netfilter: ebtables: fix fortify warnings in
size_entry_mwt()
On Wed, Aug 09, 2023 at 03:45:03PM +0800, GONG, Ruiqi wrote:
> From: "GONG, Ruiqi" <gongruiqi1@...wei.com>
>
> 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);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> The compiler is complaining:
>
> memcpy(&offsets[1], &entry->watchers_offset,
> sizeof(offsets) - sizeof(offsets[0]));
>
> where memcpy reads beyong &entry->watchers_offset to copy
nit: beyong -> beyond
...
Powered by blists - more mailing lists