linux-kernel - Re: 4.5.0-rc6: kernel BUG at ../mm/memory.c:1879

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Message-ID: <20160307130338.GI19428@n2100.arm.linux.org.uk>
Date:	Mon, 7 Mar 2016 13:03:38 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Vlastimil Babka <vbabka@...e.cz>
Cc:	"Matwey V. Kornilov" <matwey.kornilov@...il.com>,
	linux-mm@...ck.org, Rusty Russell <rusty@...tcorp.com.au>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: 4.5.0-rc6: kernel BUG at ../mm/memory.c:1879

On Mon, Mar 07, 2016 at 01:51:40PM +0100, Vlastimil Babka wrote:
> [+CC ARM, module maintainers/lists]
> 
> On 03/07/2016 12:14 PM, Matwey V. Kornilov wrote:
> >
> >Hello,
> >
> >I see the following when try to boot 4.5.0-rc6 on ARM TI AM33xx based board.
> >
> >     [   13.907631] ------------[ cut here ]------------
> >     [   13.912323] kernel BUG at ../mm/memory.c:1879!
> 
> That's:
> BUG_ON(addr >= end);
> 
> where:
> end = addr + size;
> 
> All these variables are unsigned long, so they overflown?
> 
> I don't know ARM much, and there's no code for decodecode, but if I get the
> calling convention correctly, and the registers didn't change, both addr is
> r1 and size is r2, i.e. both bf006000. Weird.

A fix has been recently merged for this.  Look out for
"ARM: 8544/1: set_memory_xx fixes"

-- 
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