linux-kernel - Re: kernel BUG at mm/shmem.c:LINE!

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Message-ID: <20180709143610.GD2662@bombadil.infradead.org>
Date:   Mon, 9 Jul 2018 07:36:10 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     syzbot <syzbot+b8e0dfee3fd8c9012771@...kaller.appspotmail.com>
Cc:     hughd@...gle.com, linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: kernel BUG at mm/shmem.c:LINE!

On Fri, Jul 06, 2018 at 06:19:02PM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following crash on:
> 
> HEAD commit:    526674536360 Add linux-next specific files for 20180706
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=116d16fc400000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=c8d1cfc0cb798e48
> dashboard link: https://syzkaller.appspot.com/bug?extid=b8e0dfee3fd8c9012771
> compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
> syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=170e462c400000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15f1ba2c400000
> 
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+b8e0dfee3fd8c9012771@...kaller.appspotmail.com

#syz fix: shmem: Convert shmem_add_to_page_cache to XArray