From: Asias He <asias.hejun@gmail.com>
Date: Wed, 15 Jan 2014 23:48:48 +0000 (+1030)
Subject: virtio-scsi: Fix hotcpu_notifier use-after-free with virtscsi_freeze
X-Git-Tag: v3.14-rc1~125^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f466f75385369a181409e46da272db3de6f5c5cb;p=pandora-kernel.git

virtio-scsi: Fix hotcpu_notifier use-after-free with virtscsi_freeze

vqs are freed in virtscsi_freeze but the hotcpu_notifier is not
unregistered. We will have a use-after-free usage when the notifier
callback is called after virtscsi_freeze.

Fixes: 285e71ea6f3583a85e27cb2b9a7d8c35d4c0d558
("virtio-scsi: reset virtqueue affinity when doing cpu hotplug")

Cc: stable@vger.kernel.org
Signed-off-by: Asias He <asias.hejun@gmail.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---

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