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| author | Fam Zheng <famz@redhat.com> | 2017-05-18 18:28:08 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-06-06 20:18:36 +0200 |
| commit | 2cbe2de5454cf9af44b620b2b40d56361a12a45f (patch) | |
| tree | 8d44642008d1ac66abbf581c2918175ca2d8b905 /hw/scsi | |
| parent | 003a0cf2cd1828a1141a874428571267b117f765 (diff) | |
| download | qemu-2cbe2de5454cf9af44b620b2b40d56361a12a45f.zip qemu-2cbe2de5454cf9af44b620b2b40d56361a12a45f.tar.gz qemu-2cbe2de5454cf9af44b620b2b40d56361a12a45f.tar.bz2 | |
virtio-scsi: Unset hotplug handler when unrealize
This matches the qbus_set_hotplug_handler in realize, and it releases
the final reference to the embedded VirtIODevice so that it is
properly finalized.
A use-after-free is fixed with this patch, indirectly:
virtio_device_instance_finalize wasn't called at hot-unplug, and the
vdev->listener would be a dangling pointer in the global and the per
address space listener list. See also RHBZ 1449031.
Cc: qemu-stable@nongnu.org
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20170518102808.30046-1-famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/scsi')
| -rw-r--r-- | hw/scsi/virtio-scsi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c index 46a3e3f..f46f06d 100644 --- a/hw/scsi/virtio-scsi.c +++ b/hw/scsi/virtio-scsi.c @@ -918,6 +918,9 @@ void virtio_scsi_common_unrealize(DeviceState *dev, Error **errp) static void virtio_scsi_device_unrealize(DeviceState *dev, Error **errp) { + VirtIOSCSI *s = VIRTIO_SCSI(dev); + + qbus_set_hotplug_handler(BUS(&s->bus), NULL, &error_abort); virtio_scsi_common_unrealize(dev, errp); } |