From: Andreas Hindborg <a.hindborg@kernel.org>
To: Priya Bala Govindasamy <pgovind2@uci.edu>, Gary Guo <gary@garyguo.net>
Cc: Breno Leitao <leitao@debian.org>,
boqun@kernel.org, bjorn3_gh@protonmail.com, lossin@kernel.org,
aliceryhl@google.com, tmgross@umich.edu, dakr@kernel.org,
daniel.almeida@collabora.com, tamird@kernel.org,
acourbot@nvidia.com, work@onurozkan.dev,
rust-for-linux@vger.kernel.org, ardalan@uci.edu,
zhiyunq@cs.ucr.edu, dzueck@uci.edu, ojeda@kernel.org
Subject: Re: [PATCH 0/1] rust: configfs: Fix reference creation from uninitialized data in `Attribute::show`
Date: Fri, 09 Oct 2026 22:17:18 +0200 [thread overview]
Message-ID: <87pkxid3xt.fsf@kernel.org> (raw)
In-Reply-To: <CAPPBnEZBeB2cZ7_2Syt_Vy0HcXWrRF6j-M1HmZQwKkwG=1nz-Q@mail.gmail.com>
"Priya Bala Govindasamy" <pgovind2@uci.edu> writes:
> Hi Gary,
>
> `Attribute::show` creates an `&mut [u8; PAGE_SIZE]` over a page that may be only partially initialized. Rust's array
> documentation requires all elements of an array to be initialized [1]. So this doesn't meet the documented requirements.
> Moreover, `AttributeOperations::show` is a safe trait method and could be implemented to read any bytes from that array
> without using `unsafe`. Reading an uninitialized byte would be undefined behavior.
>
> [1] https://doc.rust-lang.org/reference/types/array.html
This was HTML, so the list will drop it.
Best regards,
Andreas Hindborg
next prev parent reply other threads:[~2026-10-09 20:33 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cUqSvTsTaMYu_TRrAABCYTNz0HZf5JeFdIq_Vv4e_-GFMgI5NwVfZJDcy8CTgc4fH_1OoiiMg2I2LIzQX1y3Rg==@protonmail.internalid>
2026-10-08 23:42 ` [PATCH 0/1] rust: configfs: Fix reference creation from uninitialized data in `Attribute::show` Priya Bala Govindasamy
2026-10-08 23:42 ` [PATCH] " Priya Bala Govindasamy
[not found] ` <87v77bcg0m.fsf@kernel.org>
2026-10-09 12:49 ` [PATCH 0/1] " Andreas Hindborg
2026-10-09 12:54 ` Gary Guo
[not found] ` <f-SD-RJDAM9vxqOj3MupDr-geggiu7qcKsYBwlTK02DS6siKkRU643dmvGb-ihkpH5LKF6zW1DH2KHAmzXjvNg==@protonmail.internalid>
[not found] ` <CAPPBnEZBeB2cZ7_2Syt_Vy0HcXWrRF6j-M1HmZQwKkwG=1nz-Q@mail.gmail.com>
2026-10-09 20:17 ` Andreas Hindborg [this message]
2026-10-09 20:32 ` Andreas Hindborg
2026-10-09 22:15 ` Gary Guo
2026-10-09 21:19 ` Priya Bala Govindasamy
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