libvhost-user: Fix resource leak
Free the mmaped memory when we need to mmap new memory space on vu_set_mem_table_exec() and vu_set_log_base_exec() to avoid memory leak. Also close the corresponding fd after mmap() on vu_set_log_base_exec() to avoid fd leak. Signed-off-by: NYongji Xie <xieyongji@baidu.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Reviewed-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
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