linux-kernel - Re: rust nvme driver: potential sleep-in-atomic-context

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Message-ID: <CANiq72n1eo4AX2mHdWkYUmLSy2WOHCGG+X6ZTmtPft7JC+t2jA@mail.gmail.com>
Date:   Thu, 3 Nov 2022 10:37:33 +0100
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Dennis Dai <dzy.0424thu@...il.com>
Cc:     Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Andreas Hindborg <andreas@...aspace.dk>
Subject: Re: rust nvme driver: potential sleep-in-atomic-context

On Thu, Nov 3, 2022 at 7:12 AM Dennis Dai <dzy.0424thu@...il.com> wrote:
>
> The rust nvme driver [1] (which is still pending to be merged into
> mainline [2]) has a potential sleep-in-atomic-context bug.
>
>     dev.queues.lock().io.try_reserve(nr_io_queues as _)?;

Cc'ing Andreas and fixing Wedson's email. Note that this was written
when it wasn't decided how the `try_*` methods would know about the
flags.

Cheers,
Miguel