video: tegra: nvmap : check for invalid handle

Check for invalid handle passed to nvmap to
avoid crash in nvmap

bug 1415394

Change-Id: Iacb386c3cd7b4d84f5d7e04881d58402b853a7b5
Reviewed-on: http://git-master/r/338640
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Tested-by: Bharat Nihalani <bnihalani@nvidia.com>
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>

diff --git a/drivers/video/tegra/nvmap/nvmap_ioctl.c b/drivers/video/tegra/nvmap/nvmap_ioctl.c
index e22df7f567fb34acf261c240069dcca5965cb614..7fa8386d2b2679373f3176f2b18d4e6ca1a0311a 100644 (file)
--- a/drivers/video/tegra/nvmap/nvmap_ioctl.c
+++ b/drivers/video/tegra/nvmap/nvmap_ioctl.c
@@ -581,6 +581,9 @@ int nvmap_ioctl_get_param(struct file *filp, void __user* arg)
                return -EFAULT;
 
        handle = unmarshal_user_handle(op.handle);
+       if (!handle)
+               return -EINVAL;
+
        h = nvmap_get_handle_id(client, handle);
        if (!h)
                return -EINVAL;