1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c
index 10d8c4b4baeb..d8df17a7d5fc 100644
--- a/drivers/video/via/viafbdev.c
+++ b/drivers/video/via/viafbdev.c
@@ -680,7 +680,7 @@ static int viafb_ioctl(struct fb_info *info, u_int cmd, u_long arg)
                 if (!viafb_gamma_table)
                         return -ENOMEM;
                 if (copy_from_user(viafb_gamma_table, argp,
-                                sizeof(viafb_gamma_table))) {
+                                256 * sizeof(u32))) {
                         kfree(viafb_gamma_table);
                         return -EFAULT;
                 }
@@ -694,7 +694,7 @@ static int viafb_ioctl(struct fb_info *info, u_int cmd, u_long arg)
                         return -ENOMEM;
                 viafb_get_gamma_table(viafb_gamma_table);
                 if (copy_to_user(argp, viafb_gamma_table,
-                        sizeof(viafb_gamma_table))) {
+                        256 * sizeof(u32))) {
                         kfree(viafb_gamma_table);
                         return -EFAULT;
                 }