From 6f84eb3889a7035c07eeb2d337d2c3b06a6777f0 Mon Sep 17 00:00:00 2001 From: Laurent Vivier Date: Fri, 11 Feb 2022 18:02:59 +0100 Subject: [PATCH 4/6] hw/virtio: vdpa: Fix leak of host-notifier memory-region RH-Author: Laurent Vivier RH-MergeRequest: 122: hw/virtio: vdpa: Fix leak of host-notifier memory-region RH-Commit: [1/1] cd8719f57b2eb398cce108e191c7155a112f4fc8 RH-Bugzilla: 2027208 RH-Acked-by: Jason Wang RH-Acked-by: Cindy Lu RH-Acked-by: MST RH-Acked-by: Stefano Garzarella BZ: https://bugzilla.redhat.com/2027208 BRANCH: rhel-8.6.0 UPSTREAM: Merged BREW: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=43682903 If call virtio_queue_set_host_notifier_mr fails, should free host-notifier memory-region. This problem can trigger a coredump with some vDPA drivers (mlx5, but not with the vdpasim), if we unplug the virtio-net card from the guest after a stop/start. The same fix has been done for vhost-user: 1f89d3b91e3e ("hw/virtio: Fix leak of host-notifier memory-region") Fixes: d0416d487bd5 ("vhost-vdpa: map virtqueue notification area if possible") Cc: jasowang@redhat.com Resolves: https://bugzilla.redhat.com/2027208 Signed-off-by: Laurent Vivier Message-Id: <20220211170259.1388734-1-lvivier@redhat.com> Cc: qemu-stable@nongnu.org Acked-by: Jason Wang Reviewed-by: Stefano Garzarella Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin (cherry picked from commit 98f7607ecda00dea3cbb2ed7b4427c96846efb83) Signed-off-by: Laurent Vivier --- hw/virtio/vhost-vdpa.c | 1 + 1 file changed, 1 insertion(+) diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index bcaf00e09f..78da48a333 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -415,6 +415,7 @@ static int vhost_vdpa_host_notifier_init(struct vhost_dev *dev, int queue_index) g_free(name); if (virtio_queue_set_host_notifier_mr(vdev, queue_index, &n->mr, true)) { + object_unparent(OBJECT(&n->mr)); munmap(addr, page_size); goto err; } -- 2.27.0