linux-kernel - Re: kernel BUG at mm/highmem.c:417! invalid opcode: 0000 EIP: zero_user

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Message-ID: <20201125112302.zh6x3hq7wyzqoz66@linutronix.de>
Date:   Wed, 25 Nov 2020 12:23:02 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     Naresh Kamboju <naresh.kamboju@...aro.org>,
        open list <linux-kernel@...r.kernel.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        linux-mm <linux-mm@...ck.org>, lkft-triage@...ts.linaro.org,
        LTP List <ltp@...ts.linux.it>,
        Andrew Morton <akpm@...ux-foundation.org>,
        torvalds@...uxfoundation.org, Yang Shi <shy828301@...il.com>,
        Jan Kara <jack@...e.cz>, Michal Hocko <mhocko@...e.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Mel Gorman <mgorman@...e.de>, Song Liu <songliubraving@...com>,
        Zi Yan <ziy@...dia.com>, vtolkm@...glemail.com,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: kernel BUG at mm/highmem.c:417! invalid opcode: 0000 EIP:
 zero_user_segments

On 2020-11-25 00:46:32 [+0000], Matthew Wilcox wrote:
> 
> Thanks for debugging this!  I didn't realise start1 was allowed to be
> less than start2.  Try this ... (systemd is sabotaging my efforts to
> test an i386 kernel)

You are welcome.

Reviewed-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>

Sebastian