Re: [syzbot] KASAN: null-ptr-deref Write in l2cap_chan_put

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On Fri, 26 Nov 2021 at 17:47, syzbot
<syzbot+452e9465a3b2817fa4c2@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit 1bff51ea59a9afb67d2dd78518ab0582a54a472c
> Author: Wang ShaoBo <bobo.shaobowang@xxxxxxxxxx>
> Date:   Wed Sep 1 00:35:37 2021 +0000
>
>     Bluetooth: fix use-after-free error in lock_sock_nested()
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=141cfa45b00000
> start commit:   c70672d8d316 Merge tag 's390-5.9-5' of git://git.kernel.or..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=bd46548257448703
> dashboard link: https://syzkaller.appspot.com/bug?extid=452e9465a3b2817fa4c2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=152f31f9900000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: Bluetooth: fix use-after-free error in lock_sock_nested()
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Looks reasonable:

#syz fix: Bluetooth: fix use-after-free error in lock_sock_nested()



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