vhost: fix file struct leakage

Due to increased `struct file's reference counter subsequent call
to `filp_close' does not free the `struct file'. Prepend `fput' call
to decrease the reference counter.

Signed-off-by: Pavel Boldin <pboldin@mirantis.com>
Acked-by: Huawei Xie <huawei.xie@intel.com>

diff --git a/lib/librte_vhost/eventfd_link/eventfd_link.c b/lib/librte_vhost/eventfd_link/eventfd_link.c
index 7755dd6..62c45c8 100644 (file)
--- a/lib/librte_vhost/eventfd_link/eventfd_link.c
+++ b/lib/librte_vhost/eventfd_link/eventfd_link.c
@@ -117,6 +117,7 @@ eventfd_link_ioctl(struct file *f, unsigned int ioctl, unsigned long arg)
                 * Release the existing eventfd in the source process
                 */
                spin_lock(&files->file_lock);
+               fput(file);
                filp_close(file, files);
                fdt = files_fdtable(files);
                fdt->fd[eventfd_copy.source_fd] = NULL;