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From: Oleksandr Natalenko <oleksandr@redhat.com>
To: Nadav Amit <namit@vmware.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Xavier Deguillard <xdeguillard@vmware.com>,
	pv-drivers <pv-drivers@vmware.com>,
	LKML <linux-kernel@vger.kernel.org>,
	Gil Kupfer <gilkup@gmail.com>,
	"stable@vger.kernel.org" <stable@vger.kernel.org>,
	"ldu@redhat.com" <ldu@redhat.com>
Subject: Re: [PATCH v2] vmw_balloon: fixing double free when batching mode is off
Date: Mon, 16 Apr 2018 13:36:20 +0200	[thread overview]
Message-ID: <CAHcwAbTEjs6+oPYRJ1HTj--Xh6tORygYUL6aU9tMOJ1KHP_eKQ@mail.gmail.com> (raw)
In-Reply-To: <CAHcwAbQ4y3vWp7p7GayfdbzbomLrqLKMfu0egEoEODJ3LN5qOw@mail.gmail.com>

Hello.

On Fri, Mar 23, 2018 at 9:42 AM, Oleksandr Natalenko
<oleksandr@redhat.com> wrote:
>> Actually, rechecking the bug description, I might have rushed. The bug that
>> I encountered is related to the vunmap() but it is only caused when batching
>> is off, while the bug you reported has batching on.
>>
>> It seems that your sources support batching but do not include b91f108a3d54
>> (“VMware balloon: Treat init like reset”), which I think would have solved
>> the problem. I don’t see a mainline kernel that supports batching and does
>> not have this patch, so it would be helpful to see the exact module that you
>> use.
>
> Correct. The hash is d7568c130d0d0ff1fc5b364fc879b91f108a3d54, actually, though.
> Yes, we miss this commit in our code base, but also we've already
> provided a test kernel
> with this commit included to the customer. Unfortunately, we have no answer yet.

At least for one customer I can confirm that the kernel built with
both d7568c130 and the proposed patch fixes the issue.

Thanks.

-- 
Best regards,
  Oleksandr Natalenko (post-factum)
  Senior Software Maintenance Engineer

  reply	other threads:[~2018-04-16 11:36 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-12 19:19 [PATCH] " Nadav Amit
2018-03-12 19:28 ` [PATCH v2] " Nadav Amit
2018-03-14  4:02   ` Nadav Amit
2018-03-14  7:41     ` Oleksandr Natalenko
2018-03-19 18:52     ` Nadav Amit
2018-03-20  7:21       ` Oleksandr Natalenko
2018-03-22 20:02         ` Nadav Amit
2018-03-23  8:42           ` Oleksandr Natalenko
2018-04-16 11:36             ` Oleksandr Natalenko [this message]
2018-04-18 17:54               ` Nadav Amit
2018-04-19  6:38                 ` Greg Kroah-Hartman
2018-04-19 18:17                   ` [PATCH v3] " Nadav Amit
2018-04-30 17:30                     ` Nadav Amit
2018-05-04 11:26                       ` Oleksandr Natalenko
2018-05-30  1:21                       ` Nadav Amit
2018-05-31 20:56                         ` Nadav Amit
2018-06-01  7:59                           ` Greg Kroah-Hartman
2018-06-01 15:00                             ` Nadav Amit
2018-06-01  7:47                               ` [PATCH v3 RESEND] " Nadav Amit

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