From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Date: Tue, 19 Nov 2013 19:25:36 +0000 Subject: [PATCH] video: kyro: fix incorrect sizes when copying to userspace Message-Id: <1384889136-15516-1-git-send-email-sasha.levin@oracle.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: plagnioj@jcrosoft.com, tomi.valkeinen@ti.com Cc: gregkh@linuxfoundation.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, Sasha Levin kyro would copy u32s and specify sizeof(unsigned long) as the size to copy. This would copy more data than intended and cause memory corruption and might leak kernel memory. Signed-off-by: Sasha Levin --- drivers/video/kyro/fbdev.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/video/kyro/fbdev.c b/drivers/video/kyro/fbdev.c index 50c8574..65041e1 100644 --- a/drivers/video/kyro/fbdev.c +++ b/drivers/video/kyro/fbdev.c @@ -624,15 +624,15 @@ static int kyrofb_ioctl(struct fb_info *info, return -EINVAL; } case KYRO_IOCTL_UVSTRIDE: - if (copy_to_user(argp, &deviceInfo.ulOverlayUVStride, sizeof(unsigned long))) + if (copy_to_user(argp, &deviceInfo.ulOverlayUVStride, sizeof(deviceInfo.ulOverlayUVStride))) return -EFAULT; break; case KYRO_IOCTL_STRIDE: - if (copy_to_user(argp, &deviceInfo.ulOverlayStride, sizeof(unsigned long))) + if (copy_to_user(argp, &deviceInfo.ulOverlayStride, sizeof(deviceInfo.ulOverlayStride))) return -EFAULT; break; case KYRO_IOCTL_OVERLAY_OFFSET: - if (copy_to_user(argp, &deviceInfo.ulOverlayOffset, sizeof(unsigned long))) + if (copy_to_user(argp, &deviceInfo.ulOverlayOffset, sizeof(deviceInfo.ulOverlayOffset))) return -EFAULT; break; } -- 1.7.10.4