From: Andrew Morton <akpm@linux-foundation.org>
To: harn-solo@gmx.de
Cc: bugzilla-daemon@bugzilla.kernel.org, linux-mm@kvack.org,
ebru.akagunduz@gmail.com, Hugh Dickins <hughd@google.com>
Subject: Re: [Bug 112301] New: [bisected] NULL pointer dereference when starting a kvm based VM
Date: Thu, 11 Feb 2016 13:30:26 -0800 [thread overview]
Message-ID: <20160211133026.96452d486f8029084c4129b7@linux-foundation.org> (raw)
In-Reply-To: <bug-112301-27@https.bugzilla.kernel.org/>
(switched to email. Please respond via emailed reply-to-all, not via the
bugzilla web interface).
On Thu, 11 Feb 2016 07:09:04 +0000 bugzilla-daemon@bugzilla.kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=112301
>
> Bug ID: 112301
> Summary: [bisected] NULL pointer dereference when starting a
> kvm based VM
> Product: Memory Management
> Version: 2.5
> Kernel Version: 4.5-rcX
> Hardware: All
> OS: Linux
> Tree: Mainline
> Status: NEW
> Severity: normal
> Priority: P1
> Component: Other
> Assignee: akpm@linux-foundation.org
> Reporter: harn-solo@gmx.de
> Regression: No
>
> Created attachment 203451
> --> https://bugzilla.kernel.org/attachment.cgi?id=203451&action=edit
> Call Trace of a NULL pointer dereference at gup_pte_range
>
> Starting a qemu-kvm based VM configured to use hughpages I'm getting the
> following NULL pointer dereference, see attached dmesg section.
>
> The issue was introduced with commit 7d2eba0557c18f7522b98befed98799990dd4fdb
> Author: Ebru Akagunduz <ebru.akagunduz@gmail.com>
> Date: Thu Jan 14 15:22:19 2016 -0800
> mm: add tracepoint for scanning pages
Thanks for the detailed report. Can you please verify that your tree
has 629d9d1cafbd49cb374 ("mm: avoid uninitialized variable in
tracepoint")?
vfio_pin_pages() doesn't seem to be doing anything crazy. Hugh, Ebru:
could you please take a look?
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next parent reply other threads:[~2016-02-11 21:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-112301-27@https.bugzilla.kernel.org/>
2016-02-11 21:30 ` Andrew Morton [this message]
2016-02-12 8:26 ` Aw: Re: [Bug 112301] New: [bisected] NULL pointer dereference when starting a kvm based VM Harn-Solo
2016-02-12 21:10 ` Hugh Dickins
2016-02-13 10:15 ` Aw: " Harn-Solo
2016-02-17 0:38 ` Dan Williams
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