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From:   Chunyu Hu <chuhu.ncepu@gmail.com>
Date:   Fri, 8 Jun 2018 14:12:34 +0800
Message-ID: <CABATaM6575m0g3B4_tuEfh3-14hZUuEV4=32zfZ+7jr+mJnz9Q@mail.gmail.com>
Subject: Re: Block IO issue in kernel-v4.17
To:     Jens Axboe <axboe@kernel.dk>
Cc:     Kent Overstreet <kent.overstreet@gmail.com>,
        Li Wang <liwang@redhat.com>, Coly Li <colyli@suse.de>,
        hch@lst.de, darrick.wong@oracle.com, snitzer@redhat.com,
        linux-block@vger.kernel.org,
        linux-kernel <linux-kernel@vger.kernel.org>
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On 7 June 2018 at 23:41, Jens Axboe <axboe@kernel.dk> wrote:
> On 6/7/18 8:46 AM, Jens Axboe wrote:
>> On 6/7/18 12:33 AM, Chunyu Hu wrote:
>>> kasan reported a user-after-free. I'm using a kvm machine, it panic
>>> during boot. I'm using the latest linux tree. which contains below.
>>>
>>> commit d377535405686f735b90a8ad4ba269484cd7c96e
>>> Author: Kent Overstreet <kent.overstreet@gmail.com>
>>> Date:   Tue Jun 5 05:26:33 2018 -0400
>>>
>>>     dm: Use kzalloc for all structs with embedded biosets/mempools
>>
>> Can you try with the below? Li Wang, would be great if you could too.
>
> Please try this one instead.

My kvm machine boot successfully with this and works fine under pressure.
Thanks for the fix.