Re: [syzbot] [fs?] [mm?] INFO: task hung in page_cache_ra_unbounded (2)

syzbot has bisected this issue to:

commit e305509e678b3a4af2b3cfd410f409f7cdaabb52
Author: Lin Ma [off-list ref]
Date:   Sun May 30 13:37:43 2021 +0000

    Bluetooth: use correct lock to prevent UAF of hdev object

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16a579eb980000
start commit:   431c1646e1f8 Linux 6.11-rc6
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=15a579eb980000
console output: https://syzkaller.appspot.com/x/log.txt?x=11a579eb980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=660f6eb11f9c7dc5
dashboard link: https://syzkaller.appspot.com/bug?extid=265e1cae90f8fa08f14d
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16f8f0fb980000

Reported-by: syzbot+265e1cae90f8fa08f14d@syzkaller.appspotmail.com
Fixes: e305509e678b ("Bluetooth: use correct lock to prevent UAF of hdev object")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection