Re: WARNING: suspicious RCU usage in ctrl_cmd_new_lookup

[Dmitry Vyukov]

On Thu, Oct 22, 2020 at 2:40 PM syzbot
<syzbot+3025b9294f8cb0ede850@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit a7809ff90ce6c48598d3c4ab54eb599bec1e9c42
> Author: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
> Date:   Sat Sep 26 16:56:25 2020 +0000
>
>     net: qrtr: ns: Protect radix_tree_deref_slot() using rcu read locks
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=143867c8500000
> start commit:   7ae77150 Merge tag 'powerpc-5.8-1' of git://git.kernel.org..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=d195fe572fb15312
> dashboard link: https://syzkaller.appspot.com/bug?extid=3025b9294f8cb0ede850
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11802cf9100000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=144acc03100000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: net: qrtr: ns: Protect radix_tree_deref_slot() using rcu read locks
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

#syz fix: net: qrtr: ns: Protect radix_tree_deref_slot() using rcu read locks