linux-hardening - Re: [PATCH 2/2][next] clk: socfpga: agilex: Add bounds-checking coverage for struct stratix10_clock

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Date: Wed, 11 Oct 2023 19:22:07 -0600
From: "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To: Kees Cook <keescook@...omium.org>,
 "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Dinh Nguyen <dinguyen@...nel.org>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, linux-kernel@...r.kernel.org,
 linux-hardening@...r.kernel.org
Subject: Re: [PATCH 2/2][next] clk: socfpga: agilex: Add bounds-checking
 coverage for struct stratix10_clock_data

>> Hence, we need to move the assignments to `clk_data->clk_data.num` after
>> allocations for `struct stratix10_clock_data` and before accessing the
>> flexible array `clk_data->clk_data.hws`. And, as assignments for both
>> `clk_data->clk_data.num` and `clk_data->base` are originally adjacent to
>> each other, relocate both assignments together.
>>
>> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
> 
> Yeah, ew. That's super tricky. Nice find.

Indeed. D:

> 
> Reviewed-by: Kees Cook <keescook@...omium.org>

Thanks!
--
Gustavo