On Fri, Nov 24, 2017 at 2:36 AM, Reshetova, Elena
<elena.reshetova@xxxxxxxxx> wrote:
>> On Fri, Oct 20, 2017 at 10:37:38AM +0300, Elena Reshetova wrote:
>> > } else if (dd->dm_dev->mode != (mode | dd->dm_dev->mode)) {
>> > r = upgrade_mode(dd, mode, t->md);
>> > if (r)
>> > return r;
>> > + refcount_inc(&dd->count);
>> > }
>>
>> Missing here:
>>
>> else
>> refcount_inc(&dd->count);
>>
>> ?
>
> Oh, yes, thanks for catching this! I think this got unnoticed so far and patch was merged, so I am going to send a followup patch now.
I pushed this fix and will send to Linus next week:
https://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm.git/commit/?h=dm-4.15&id=d908af82d06cc420f9581c97c6db941cb87e4434
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