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

[Cong Wang]

On Fri, Mar 22, 2019 at 5:19 AM Dmitry Vyukov <dvyukov@xxxxxxxxxx> wrote:
>
> On Fri, Mar 22, 2019 at 1:04 PM syzbot
> <syzbot+b364ed862aa07c74bc62@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> >
> > syzbot has bisected this bug to:
> >
> > commit c470abd4fde40ea6a0846a2beab642a578c0b8cd
> > Author: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> > Date:   Sun Feb 19 22:34:00 2017 +0000
> >
> >      Linux 4.10
> >
> > bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1664c6df200000
> > start commit:   c470abd4 Linux 4.10
> > git tree:       upstream
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=7308e68273924137
> > dashboard link: https://syzkaller.appspot.com/bug?extid=b364ed862aa07c74bc62
> > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=152532bb400000
> > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13f73320c00000
> >
> > Reported-by: syzbot+b364ed862aa07c74bc62@xxxxxxxxxxxxxxxxxxxxxxxxx
> > Fixes: c470abd4fde4 ("Linux 4.10")
> >
> > For information about bisection process see: https://goo.gl/tpsmEJ#bisection
>
> The same story of HCI being broken before v4.10, so this is bisected
> to the release.

Does syzbot test the latest upstream? Isn't this supposed to be fixed by

commit e20a2e9c42c9e4002d9e338d74e7819e88d77162
Author: Myungho Jung <mhjungk@xxxxxxxxx>
Date:   Sat Feb 2 16:56:36 2019 -0800

    Bluetooth: Fix decrementing reference count twice in releasing socket

?