linux-kernel - Re: [stable 4.19] [PANIC]: tracing: Centralize preemptirq tracepoints and unify their usage

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Message-ID: <20200925051518.GA605188@kroah.com>
Date:   Fri, 25 Sep 2020 07:15:18 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     Joel Fernandes <joel@...lfernandes.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Namhyung Kim <namhyung@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux- stable <stable@...r.kernel.org>,
        Sasha Levin <sashal@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        LTP List <ltp@...ts.linux.it>, lkft-triage@...ts.linaro.org
Subject: Re: [stable 4.19] [PANIC]: tracing: Centralize preemptirq
 tracepoints and unify their usage

On Fri, Sep 25, 2020 at 10:13:05AM +0530, Naresh Kamboju wrote:
> >From stable rc 4.18.1 onwards to today's stable rc 4.19.147
> 
> There are two problems  while running LTP tracing tests
> 1) kernel panic  on i386, qemu_i386, x86_64 and qemu_x86_64 [1]
> 2) " segfault at 0 ip " and "Code: Bad RIP value" on x86_64 and qemu_x86_64 [2]
> Please refer to the full test logs from below links.
> 
> The first bad commit found by git bisect.
>    commit: c3bc8fd637a9623f5c507bd18f9677effbddf584
>    tracing: Centralize preemptirq tracepoints and unify their usage
> 
> Reported-by: Naresh Kamboju <naresh.kamboju@...aro.org>

So this also is reproducable in 5.4 and Linus's tree right now?

Or are newer kernels working fine?

thanks,

greg k-h