linux-kernel - Re: BUG_ON(!PageLocked(page)) in munlock_vma_page/migrate_pages/__block_write

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Message-ID: <CACT4Y+ZCxQgJma5zDuLtHz4RXZGQEgDLwax+McS6iM8BnXsUhA@mail.gmail.com>
Date:	Tue, 15 Dec 2015 21:08:46 +0100
From:	Dmitry Vyukov <dvyukov@...gle.com>
To:	Johannes Weiner <hannes@...xchg.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Eric B Munson <emunson@...mai.com>,
	David Rientjes <rientjes@...gle.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Jeff Vander Stoep <jeffv@...gle.com>,
	Alexander Kuleshov <kuleshovmail@...il.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Sasha Levin <sasha.levin@...cle.com>,
	Hugh Dickins <hughd@...gle.com>,
	syzkaller <syzkaller@...glegroups.com>,
	Kostya Serebryany <kcc@...gle.com>,
	Alexander Potapenko <glider@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>
Subject: Re: BUG_ON(!PageLocked(page)) in munlock_vma_page/migrate_pages/__block_write_begin

On Tue, Dec 15, 2015 at 8:42 PM, Johannes Weiner <hannes@...xchg.org> wrote:
> Hi Dmitry,
>
> On Tue, Dec 15, 2015 at 08:23:34PM +0100, Dmitry Vyukov wrote:
>>I am seeing lots of similar BUGs in different functions all pointing
>> to BUG_ON(!PageLocked(page)). I reproduced them on several recent
>> commits, including stock 6764e5ebd5c62236d082f9ae030674467d0b2779 (Dec
>> 9) with no changes on top and no KASAN/etc.
>
> This should be fixed in newer kernels with this commit:
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=dfd01f026058a59a513f8a365b439a0681b803af

Testing with this patch now. Thanks!
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