linux-kernel - Re: [PATCH v2] netfs: Fix a KMSAN uninit-value error in netfs_clear

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Message-ID: <3116000.1727787250@warthog.procyon.org.uk>
Date: Tue, 01 Oct 2024 13:54:10 +0100
From: David Howells <dhowells@...hat.com>
To: Christian Brauner <brauner@...nel.org>
Cc: dhowells@...hat.com, Chang Yu <marcus.yu.56@...il.com>,
    jlayton@...nel.org, netfs@...ts.linux.dev,
    linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
    skhan@...uxfoundation.org
Subject: Re: [PATCH v2] netfs: Fix a KMSAN uninit-value error in netfs_clear_buffer

Chang Yu <marcus.yu.56@...il.com> wrote:

> Use folioq_count instead of folioq_nr_slots to fix a KMSAN uninit-value
> error in netfs_clear_buffer
> 
> Signed-off-by: Chang Yu <marcus.yu.56@...il.com>
> Reported-by: syzbot+921873345a95f4dae7e9@...kaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=921873345a95f4dae7e9
> Fixes: cd0277ed0c18 ("netfs: Use new folio_queue data type and iterator instead of xarray iter")

Acked-by: David Howells <dhowells@...hat.com>

Christian: Can you pick this up?