linux-kernel - Re: [syzbot] Re: [PATCH v1] Bluetooth: SCO: Use disable_delayed_work

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Message-ID: <66fc5272.050a0220.f28ec.04cb.GAE@google.com>
Date: Tue, 01 Oct 2024 12:50:10 -0700
From: syzbot <syzbot+4c0d0c4cde787116d465@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] Re: [PATCH v1] Bluetooth: SCO: Use disable_delayed_work_sync

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***

Subject: Re: [PATCH v1] Bluetooth: SCO: Use disable_delayed_work_sync
Author: luiz.dentz@...il.com

#syz test

On Tue, Oct 1, 2024 at 3:48 PM Luiz Augusto von Dentz
<luiz.dentz@...il.com> wrote:
>
> From: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>
>
> This makes use of disable_delayed_work_sync instead
> cancel_delayed_work_sync as it not only cancel the ongoing work but also
> disables new submit which is disarable since the object holding the work
> is about to be freed.
>
> Reported-by: syzbot+4c0d0c4cde787116d465@...kaller.appspotmail.com
> Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465
> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>
> ---
>  net/bluetooth/sco.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
> index a5ac160c592e..f0604d7834df 100644
> --- a/net/bluetooth/sco.c
> +++ b/net/bluetooth/sco.c
> @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err)
>         }
>
>         /* Ensure no more work items will run before freeing conn. */
> -       cancel_delayed_work_sync(&conn->timeout_work);
> +       disable_delayed_work_sync(&conn->timeout_work);
>
>         hcon->sco_data = NULL;
>         kfree(conn);
> --
> 2.46.1
>


-- 
Luiz Augusto von Dentz