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From: Seunguk Shin <seunguk.shin@arm.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: <linux-kernel@vger.kernel.org>,
	 Alexander Viro <viro@zeniv.linux.org.uk>,
	 Christian Brauner <brauner@kernel.org>,
	Matthew Wilcox <willy@infradead.org>,  Jan Kara <jack@suse.cz>,
	<linux-fsdevel@vger.kernel.org>,  <nvdimm@lists.linux.dev>,
	<Nick.Connolly@arm.com>,  <ffidencio@nvidia.com>
Subject: Re: [PATCH v4, RESEND] fs/dax: check zero or empty entry before converting xarray entry
Date: Fri, 31 Jul 2026 09:56:30 +0100	[thread overview]
Message-ID: <m25x1vzge9.fsf@arm.com> (raw)
In-Reply-To: <20260730103804.063ce671588b02c2596d5de3@linux-foundation.org> (Andrew Morton's message of "Thu, 30 Jul 2026 10:38:04 -0700")

Hi Andrew,

Thank you for looking into this.

> Are there any known userspace-visible runtime effects of this?

Yes. I'm trying to fix this because it caused kernel panic on a VM with DAX in
kata-containers project:
https://github.com/kata-containers/kata-containers/commit/1c154b4c15cfc63e06ad1c48a801064677e874e2

I'll add kernel panic message in the commit log like patch v2:
https://lore.kernel.org/all/m2tsvmue92.fsf@arm.com/

Thank you.

      reply	other threads:[~2026-07-31  8:56 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-30 13:12 [PATCH v4, RESEND] fs/dax: check zero or empty entry before converting xarray entry Seunguk Shin
2026-07-30 17:38 ` Andrew Morton
2026-07-31  8:56   ` Seunguk Shin [this message]

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