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| author | Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> | 2019-02-14 17:23:21 +0300 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2019-02-18 08:50:10 +0300 |
| commit | 068e79f4a9d613f4327cb4062a1e49c0eaca7149 (patch) | |
| tree | 8c58b3e65adf69dbf417218000fd3d71d46bf528 /drivers/xen | |
| parent | fa13e665e02874c0a5f4d06d6967ae34a6cb3d6a (diff) | |
| download | linux-068e79f4a9d613f4327cb4062a1e49c0eaca7149.tar.xz | |
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.c | 9 |
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); } |