From: Dan Carpenter <dan.carpenter@oracle.com>
To: Kees Cook <keescook@chromium.org>
Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>,
Viresh Kumar <vireshk@kernel.org>,
Johan Hovold <johan@kernel.org>, Alex Elder <elder@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
greybus-dev@lists.linaro.org, linux-staging@lists.linux.dev,
linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org
Subject: Re: [PATCH][next] staging: greybus: i2c: Use struct_size() helper in gb_i2c_operation_create()
Date: Wed, 26 Jan 2022 13:54:04 +0300 [thread overview]
Message-ID: <20220126105404.GY1951@kadam> (raw)
In-Reply-To: <202201241213.82E7D9F598@keescook>
On Mon, Jan 24, 2022 at 12:19:03PM -0800, Kees Cook wrote:
> This could still overflow if struct_size() returns SIZE_MAX. Perhaps:
>
> if (check_add_overflow(struct_size(request, ops, msg_count),
> data_out_size, &request_size))
> request_size = SIZE_MAX;
>
> I should brush off the saturating arithmetic helpers series:
> https://lore.kernel.org/all/20210920180853.1825195-1-keescook@chromium.org/
Yes, please! Those seem like a million times easier to use.
regards,
dan carpenter
next prev parent reply other threads:[~2022-01-26 10:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-21 22:22 [PATCH][next] staging: greybus: i2c: Use struct_size() helper in gb_i2c_operation_create() Gustavo A. R. Silva
2022-01-24 20:19 ` Kees Cook
2022-01-24 20:42 ` Gustavo A. R. Silva
2022-01-26 10:54 ` Dan Carpenter [this message]
2022-01-27 10:05 ` Kees Cook
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