linux-kernel - Re: BUG: Bad page map in process python2 pte:10000000000 pmd:17e8be067

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Date:   Thu, 3 May 2018 07:42:57 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Huaitong Han <oenhan@...il.com>
Cc:     Fengguang Wu <fengguang.wu@...el.com>, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Huang Ying <ying.huang@...el.com>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Minchan Kim <minchan@...nel.org>,
        Hugh Dickins <hughd@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: Re: BUG: Bad page map in process python2 pte:10000000000
 pmd:17e8be067

On 05/02/2018 08:20 PM, Huaitong Han wrote:
> 
> kernel: swap_free: Bad swap file entry 1000000000103256
> kernel: BUG: Bad page map in process in:imjournal  pte:8192b1000 pmd:3ff9324067
> kernel: addr:00007f920adc5000 vm_flags:080000d1 anon_vma:
> (null) mapping:ffff883fe5284960 index:3f8
> kernel: vma->vm_ops->fault: shmem_fault+0x0/0x1d0
> kernel: vma->vm_file->f_op->mmap: shmem_mmap+0x0/0x30
> kernel: CPU: 5 PID: 9166 Comm: in:imjournal Tainted: G        W  OE
> K------------   3.10.0-514.16.1.el7.x86_64 #1

This looks like an entirely different signature.  There are lots of bits
set in the bad swap entry instead of a single one.  It's also a vintage
RHEL kernel, not mainline.