linux-kernel - Re: Rust kernel policy

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Message-ID: <b7a3958e-7a0a-482e-823a-9d6efcb4b577@stanley.mountain>
Date: Wed, 19 Feb 2025 11:05:49 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Christoph Hellwig <hch@...radead.org>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
	rust-for-linux <rust-for-linux@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	David Airlie <airlied@...il.com>, linux-kernel@...r.kernel.org,
	ksummit@...ts.linux.dev
Subject: Re: Rust kernel policy

On Tue, Feb 18, 2025 at 08:08:18AM -0800, Christoph Hellwig wrote:
> But that also shows how core maintainers
> are put off by trivial things like checking for integer overflows or
> compiler enforced synchronization (as in the clang thread sanitizer).
> How are we're going to bridge the gap between a part of the kernel that
> is not even accepting relatively easy rules for improving safety vs
> another one that enforces even strong rules.

Yeah.  It's an ironic thing...

	unsigned long total = nr * size;

	if (nr > ULONG_MAX / size)
		return -EINVAL;

In an ideal world, people who write code like that should receive a
permanent ban from promoting Rust.

regards,
dan carpenter