virtio-scsi: delete vqs in unrealize to avoid memleaks

This patch fix memleaks when attaching/detaching virtio-scsi device, the memory leak stack is as follow: Direct leak of 21504 byte(s) in 3 object(s) allocated from: #0 0x7f491f2f2970 (/lib64/libasan.so.5+0xef970) ??:? kata-containers#1 0x7f491e94649d (/lib64/libglib-2.0.so.0+0x5249d) ??:? kata-containers#2 0x564d0f3919fa (./x86_64-softmmu/qemu-system-x86_64+0x2c3e9fa) /mnt/sdb/qemu/hw/virtio/virtio.c:2333 kata-containers#3 0x564d0f2eca55 (./x86_64-softmmu/qemu-system-x86_64+0x2b99a55) /mnt/sdb/qemu/hw/scsi/virtio-scsi.c:912 kata-containers#4 0x564d0f2ece7b (./x86_64-softmmu/qemu-system-x86_64+0x2b99e7b) /mnt/sdb/qemu/hw/scsi/virtio-scsi.c:924 kata-containers#5 0x564d0f39ee47 (./x86_64-softmmu/qemu-system-x86_64+0x2c4be47) /mnt/sdb/qemu/hw/virtio/virtio.c:3531 kata-containers#6 0x564d0f980224 (./x86_64-softmmu/qemu-system-x86_64+0x322d224) /mnt/sdb/qemu/hw/core/qdev.c:865 Reported-by: Euler Robot <[email protected]> Signed-off-by: Pan Nengyuan <[email protected]> Reviewed-by: Stefan Hajnoczi <[email protected]> Message-Id: <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
teawater · Jan 24, 2020 · c9c0ed6 · c9c0ed6
1 parent 32c87d7
commit c9c0ed6
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
@@ -943,7 +943,13 @@ void virtio_scsi_common_unrealize(DeviceState *dev)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
     VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
+    int i;
 
+    virtio_del_queue(vdev, 0);
+    virtio_del_queue(vdev, 1);
+    for (i = 0; i < vs->conf.num_queues; i++) {
+        virtio_del_queue(vdev, i + 2);
+    }
     g_free(vs->cmd_vqs);
     virtio_cleanup(vdev);
 }