Re: KASAN: use-after-free Write in hci_conn_del

[David Sterba]

On Mon, Aug 10, 2020 at 08:35:08PM -0700, syzbot wrote:
> syzbot has bisected this issue to:
> 
> commit 6a3c7f5c87854e948c3c234e5f5e745c7c553722
> Author: Nikolay Borisov <nborisov@xxxxxxxx>
> Date:   Thu May 28 08:05:13 2020 +0000
> 
>     btrfs: don't balance btree inode pages from buffered write path

This does not make sense wrt use-after-free in HCI, which is completely
unrelated subsystem.

The patch removes a call to function doing some potentially heavy work,
so this likely affects timing and making the bisection unreliable.