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From 2005e3bb97fba4889829b58331a057b9cb35a65d Mon Sep 17 00:00:00 2001
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From: Laurent Vivier <lvivier@redhat.com>
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Date: Fri, 11 Feb 2022 18:02:59 +0100
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Subject: [PATCH 2/5] hw/virtio: vdpa: Fix leak of host-notifier memory-region
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RH-Author: Laurent Vivier <lvivier@redhat.com>
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RH-MergeRequest: 123: hw/virtio: vdpa: Fix leak of host-notifier memory-region
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RH-Commit: [1/1] ddd64cac5c29786edf652f5fa97767b261ccfcdd
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RH-Bugzilla: 2059786
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RH-Acked-by: Jason Wang <jasowang@redhat.com>
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RH-Acked-by: Cindy Lu <lulu@redhat.com>
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RH-Acked-by: MST <mst@redhat.com>
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RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
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BZ: https://bugzilla.redhat.com/2059786
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BRANCH: rhel-9.0.0
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BREW: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=43688388
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UPTREAM: Merged
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If call virtio_queue_set_host_notifier_mr fails, should free
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host-notifier memory-region.
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This problem can trigger a coredump with some vDPA drivers (mlx5,
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but not with the vdpasim), if we unplug the virtio-net card from
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the guest after a stop/start.
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The same fix has been done for vhost-user:
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1f89d3b91e3e ("hw/virtio: Fix leak of host-notifier memory-region")
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Fixes: d0416d487bd5 ("vhost-vdpa: map virtqueue notification area if possible")
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Cc: jasowang@redhat.com
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Resolves: https://bugzilla.redhat.com/2027208
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Signed-off-by: Laurent Vivier <lvivier@redhat.com>
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Message-Id: <20220211170259.1388734-1-lvivier@redhat.com>
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Cc: qemu-stable@nongnu.org
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Acked-by: Jason Wang <jasowang@redhat.com>
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Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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(cherry picked from commit 98f7607ecda00dea3cbb2ed7b4427c96846efb83)
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Signed-off-by: Laurent Vivier <lvivier@redhat.com>
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---
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hw/virtio/vhost-vdpa.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
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index bcaf00e09f..78da48a333 100644
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--- a/hw/virtio/vhost-vdpa.c
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+++ b/hw/virtio/vhost-vdpa.c
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@@ -415,6 +415,7 @@ static int vhost_vdpa_host_notifier_init(struct vhost_dev *dev, int queue_index)
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g_free(name);
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if (virtio_queue_set_host_notifier_mr(vdev, queue_index, &n->mr, true)) {
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+ object_unparent(OBJECT(&n->mr));
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munmap(addr, page_size);
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goto err;
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}
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--
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2.31.1
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