[PATCH] drm/vmwgfx: Fix memory leak in vmw_mksstat_add_ioctl()

[Rafael Mendonca]

If the copy of the description string from userspace fails, then the page
for the instance descriptor doesn't get freed before returning -EFAULT,
which leads to a memleak.

Fixes: 7a7a933edd6c ("drm/vmwgfx: Introduce VMware mks-guest-stats")
Signed-off-by: Rafael Mendonca <rafaelmen...@gmail.com>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_msg.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c 
b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
index 2aceac7856e2..089046fa21be 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
@@ -1076,6 +1076,7 @@ int vmw_mksstat_add_ioctl(struct drm_device *dev, void 
*data,
 
        if (desc_len < 0) {
                atomic_set(&dev_priv->mksstat_user_pids[slot], 0);
+               __free_page(page);
                return -EFAULT;
        }
 
-- 
2.34.1