linux-kernel - Re: [PATCH] thp, mm: Fix crash due race in MADV

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Message-ID: <ad66e93e-7219-6c07-3d11-43c0b45e3095@intel.com>
Date:   Wed, 28 Jun 2017 07:26:51 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Huang Ying <ying.huang@...el.com>,
        Minchan Kim <minchan@...nel.org>
Subject: Re: [PATCH] thp, mm: Fix crash due race in MADV_FREE handling

I came up with the exact same patch.  For posterity, here's the test
case, generated by syzkaller and trimmed down by Reinette:

	https://www.sr71.net/~dave/intel/log2.c

And the config that helps detect this:

	https://www.sr71.net/~dave/intel/config-log2

Acked-by: Dave Hansen <dave.hansen@...el.com>