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From:   Thomas Gleixner <tglx@linutronix.de>
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To:     "H.J. Lu" <hjl.tools@gmail.com>
Cc:     LKML <linux-kernel@vger.kernel.org>,
        the arch/x86 maintainers <x86@kernel.org>,
        Christoph Hellwig <hch@lst.de>,
        Josh Poimboeuf <jpoimboe@redhat.com>
Subject: Re: [PATCH] x86/dumpstack: Dump user space code correctly again
In-Reply-To: <CAMe9rOrER7Mg_YvzuqguS-GCyP-bD2hogWeo+OMXm7F6JXQUDQ@mail.gmail.com>
References: <bug-208655-6666@https.bugzilla.kernel.org/> <87h7tz306w.fsf@nanos.tec.linutronix.de> <CAMe9rOrER7Mg_YvzuqguS-GCyP-bD2hogWeo+OMXm7F6JXQUDQ@mail.gmail.com>
Date:   Wed, 22 Jul 2020 21:47:05 +0200
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"H.J. Lu" <hjl.tools@gmail.com> writes:
> On Wed, Jul 22, 2020 at 10:54 AM Thomas Gleixner <tglx@linutronix.de> wrote:
>> +       if (copy_code(regs, opcodes, prologue, sizeof(opcodes))) {
>>                 printk("%sCode: Bad RIP value.\n", loglvl);
>>         } else {
>>                 printk("%sCode: %" __stringify(PROLOGUE_SIZE) "ph <%02x> %"
>
> Add a kerel self test?

Care to whip one up?