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Date: Mon, 22 Dec 2025 13:49:07 -0800
From: Eric Biggers <ebiggers@kernel.org>
To: Christian Brauner <brauner@kernel.org>
Cc: linux-fsdevel@vger.kernel.org, Jeff Layton <jlayton@kernel.org>,
	Josef Bacik <josef@toxicpanda.com>, Jan Kara <jack@suse.cz>,
	Amir Goldstein <amir73il@gmail.com>
Subject: Re: [PATCH] pidfs: simplify PIDFD_GET_<type>_NAMESPACE ioctls
Message-ID: <20251222214907.GA189632@quark>
References: <20251117-eidesstattlich-apotheke-36d2e644079f@brauner>
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In-Reply-To: <20251117-eidesstattlich-apotheke-36d2e644079f@brauner>

On Mon, Nov 17, 2025 at 01:36:13PM +0100, Christian Brauner wrote:
> We have reworked namespaces sufficiently that all this special-casing
> shouldn't be needed anymore
> 
> Signed-off-by: Christian Brauner <brauner@kernel.org>

This causes a NULL dereference in nsfs_evict() when CONFIG_NET_NS=n.
Nothing special needed besides that: it happens just when booting the
system, using systemd.

Reverting this commit on mainline fixes the bug.

- Eric