linux-kernel - Re: [syzbot] KASAN: use-after-free Read in srcu_invoke

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Message-ID: <CAFj5m9LujfHUMv+DuCLUfrevPHuF1NxtMiu_-N-C0VTiY-KNbw@mail.gmail.com>
Date:   Thu, 13 Jan 2022 11:19:44 +0800
From:   Ming Lei <ming.lei@...hat.com>
To:     syzbot <syzbot+4f789823c1abc5accf13@...kaller.appspotmail.com>
Cc:     andrii@...nel.org, ast@...nel.org, Jens Axboe <axboe@...nel.dk>,
        bpf@...r.kernel.org, daniel@...earbox.net,
        john.fastabend@...il.com, kafai@...com, kpsingh@...nel.org,
        linux-block <linux-block@...r.kernel.org>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        songliubraving@...com, syzkaller-bugs@...glegroups.com, yhs@...com
Subject: Re: [syzbot] KASAN: use-after-free Read in srcu_invoke_callbacks

On Tue, Jan 11, 2022 at 7:03 PM syzbot
<syzbot+4f789823c1abc5accf13@...kaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit:    3770333b3f8c Add linux-next specific files for 20220106
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=171aa4e3b00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=f9eb40d9f910b474
> dashboard link: https://syzkaller.appspot.com/bug?extid=4f789823c1abc5accf13
> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12b08f53b00000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+4f789823c1abc5accf13@...kaller.appspotmail.com

BTW, the report should be addressed by the patch:

https://lore.kernel.org/linux-block/20220111123401.520192-1-ming.lei@redhat.com/T/#u

Thanks,
Ming