From: Chang Yu <marcus.yu.56@gmail.com>
To: David Howells <dhowells@redhat.com>
Cc: Chang Yu <marcus.yu.56@gmail.com>,
jlayton@kernel.org, netfs@lists.linux.dev,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
skhan@linuxfoundation.org
Subject: Re: [PATCH] netfs: Fix a KMSAN uninit-value error in netfs_clear_buffer
Date: Mon, 30 Sep 2024 23:25:33 -0700 [thread overview]
Message-ID: <ZvuV3QzwrPcC6yYo@gmail.com> (raw)
In-Reply-To: <743844.1727075543@warthog.procyon.org.uk>
On Mon, Sep 23, 2024 at 08:12:23AM +0100, David Howells wrote:
> Chang Yu <marcus.yu.56@gmail.com> wrote:
>
> > Use kzalloc instead of kmalloc in netfs_buffer_append_folio to fix
> > a KMSAN uninit-value error in netfs_clear_buffer
>
> Btw, is this a theoretical error or are you actually seeing an uninitialised
> pointer being dereferenced?
Apologies for the late reply. Yes this bug was reported by syzbot
(https://syzkaller.appspot.com/bug?extid=921873345a95f4dae7e9) and I was
able to reproduce it locally on my machine. I've just tested it with the
latest upstream and confirmed that the bug is still present. I will
send a revised patch shortly, please feel free to take a look.
Chang
prev parent reply other threads:[~2024-10-01 6:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-21 1:13 [PATCH] netfs: Fix a KMSAN uninit-value error in netfs_clear_buffer Chang Yu
2024-09-22 0:06 ` David Howells
2024-09-23 7:12 ` David Howells
2024-10-01 6:25 ` Chang Yu [this message]
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