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authorOleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>2019-02-14 16:23:21 +0200
committerJuergen Gross <jgross@suse.com>2019-02-18 06:50:10 +0100
commit068e79f4a9d613f4327cb4062a1e49c0eaca7149 (patch)
tree8c58b3e65adf69dbf417218000fd3d71d46bf528 /drivers/xen
parentfa13e665e02874c0a5f4d06d6967ae34a6cb3d6a (diff)
xen/gntdev: Check and release imported dma-bufs on close
Check if there are any imported dma-bufs left not released by user-space when grant device's release callback is called and free those if this is the case. This can happen if user-space leaks the buffers because of a bug or application has been terminated for any reason. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Reviewed-by: Boris Ostrovsky@oracle.com> Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/gntdev-dmabuf.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/xen/gntdev-dmabuf.c b/drivers/xen/gntdev-dmabuf.c
index d97fcfc5e558..2c4f324f8626 100644
--- a/drivers/xen/gntdev-dmabuf.c
+++ b/drivers/xen/gntdev-dmabuf.c
@@ -745,6 +745,14 @@ static int dmabuf_imp_release(struct gntdev_dmabuf_priv *priv, u32 fd)
return 0;
}
+static void dmabuf_imp_release_all(struct gntdev_dmabuf_priv *priv)
+{
+ struct gntdev_dmabuf *q, *gntdev_dmabuf;
+
+ list_for_each_entry_safe(gntdev_dmabuf, q, &priv->imp_list, next)
+ dmabuf_imp_release(priv, gntdev_dmabuf->fd);
+}
+
/* DMA buffer IOCTL support. */
long gntdev_ioctl_dmabuf_exp_from_refs(struct gntdev_priv *priv, int use_ptemod,
@@ -862,5 +870,6 @@ struct gntdev_dmabuf_priv *gntdev_dmabuf_init(struct file *filp)
void gntdev_dmabuf_fini(struct gntdev_dmabuf_priv *priv)
{
+ dmabuf_imp_release_all(priv);
kfree(priv);
}