linux-kernel - Re: Printing with overflow checks can cause modpost errors

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CANiq72kZgZdU4Dut3rmcWT-cujyJaP_99ekis_XdfQ-7LmgZ5Q@mail.gmail.com>
Date: Fri, 12 Sep 2025 10:27:42 +0200
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Andrew Ballance <andrewjballance@...il.com>
Cc: Joel Fernandes <joelagnelf@...dia.com>, rust-for-linux@...r.kernel.org, 
	linux-kernel@...r.kernel.org, John Hubbard <jhubbard@...dia.com>, 
	Alexandre Courbot <acourbot@...dia.com>, Timur Tabi <ttabi@...dia.com>, 
	Alistair Popple <apopple@...dia.com>, Miguel Ojeda <ojeda@...nel.org>
Subject: Re: Printing with overflow checks can cause modpost errors

On Fri, Sep 12, 2025 at 6:08 AM Andrew Ballance
<andrewjballance@...il.com> wrote:
>
> The pointer passed is const so rustc should assume that the c side does
> not change offset, but looks like rustc does not do that.

That is not possible -- a const pointer does not guarantee the value
will not be changed.

Cheers,
Miguel