netdev - Re: BUG: KASAN: stack-out-of-bounds in unwind_next

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Message-ID: <CABWYdi2ephz57BA8bns3reMGjvs5m0hYp82+jBLZ6KD3Ba6zdQ@mail.gmail.com>
Date:   Wed, 3 Feb 2021 09:46:55 -0800
From:   Ivan Babrou <ivan@...udflare.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     kernel-team <kernel-team@...udflare.com>,
        Ignat Korchagin <ignat@...udflare.com>,
        Hailong liu <liu.hailong6@....com.cn>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Miroslav Benes <mbenes@...e.cz>,
        Julien Thierry <jthierry@...hat.com>,
        Jiri Slaby <jirislaby@...nel.org>, kasan-dev@...glegroups.com,
        linux-mm@...ck.org, linux-kernel <linux-kernel@...r.kernel.org>,
        Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...hat.com>, dm-devel@...hat.com,
        "Steven Rostedt (VMware)" <rostedt@...dmis.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        Robert Richter <rric@...nel.org>,
        "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        bpf@...r.kernel.org, Alexey Kardashevskiy <aik@...abs.ru>
Subject: Re: BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x1df5/0x2650

> Can you pretty please not line-wrap console output? It's unreadable.

GMail doesn't make it easy, I'll send a link to a pastebin next time.
Let me know if you'd like me to regenerate the decoded stack.

> > edfd9b7838ba5e47f19ad8466d0565aba5c59bf0 is the first bad commit
> > commit edfd9b7838ba5e47f19ad8466d0565aba5c59bf0
>
> Not sure what tree you're on, but that's not the upstream commit.

I mentioned that it's a rebased core-static_call-2020-10-12 tag and
added a link to the upstream hash right below.

> > Author: Steven Rostedt (VMware) <rostedt@...dmis.org>
> > Date:   Tue Aug 18 15:57:52 2020 +0200
> >
> >     tracepoint: Optimize using static_call()
> >
>
> There's a known issue with that patch, can you try:
>
>   http://lkml.kernel.org/r/20210202220121.435051654@goodmis.org

I've tried it on top of core-static_call-2020-10-12 tag rebased on top
of v5.9 (to make it reproducible), and the patch did not help. Do I
need to apply the whole series or something else?