Re: general protection fault in free_verifier_state (3)

From: Alexei Starovoitov
Date: Tue Jan 21 2020 - 14:16:49 EST


On Tue, Jan 21, 2020 at 11:05 AM syzbot
<syzbot+b296579ba5015704d9fa@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> syzbot has found a reproducer for the following crash on:
>
> HEAD commit: 2e3a94aa bpf: Fix memory leaks in generic update/delete ba..
> git tree: bpf-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=15aefc6ee00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=a736c99e9fe5a676
> dashboard link: https://syzkaller.appspot.com/bug?extid=b296579ba5015704d9fa
> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10a4280de00000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1411544ee00000

Since it's in the verifier I'm guessing it's related to some of my
earlier patches.
I'll try to take a look soon.