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From: Nadav Amit <namit@vmware.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>,
	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>,
	Oleksandr Natalenko <oleksandr@redhat.com>
Subject: Re: [PATCH v2] vmw_balloon: fixing double free when batching mode is off
Date: Wed, 18 Apr 2018 17:54:21 +0000	[thread overview]
Message-ID: <A518FF77-554C-40E0-8656-5BEFA57C7A8E@vmware.com> (raw)
In-Reply-To: <CAHcwAbTEjs6+oPYRJ1HTj--Xh6tORygYUL6aU9tMOJ1KHP_eKQ@mail.gmail.com>

Oleksandr Natalenko <oleksandr@redhat.com> wrote:

> 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.

Greg,

Can you commit please this patch? Preferably for 4.17?

There is one minor mistake in the commit message - this patch fixes
f220a80f0c2e and not as written. Please let me know if you want a v3 or can
amend it while committing.

Thanks,
Nadav


  reply	other threads:[~2018-04-18 17:54 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
2018-04-18 17:54               ` Nadav Amit [this message]
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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