From 4507b718182f5f0e8fbd52fd29f4acbf3acb68f8 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Thu, 24 Feb 2011 08:35:06 +1000 Subject: [PATCH] drm: fix unsigned vs signed comparison issue in modeset ctl ioctl. commit 1922756124ddd53846877416d92ba4a802bc658f upstream. This fixes CVE-2011-1013. Reported-by: Matthiew Herrb (OpenBSD X.org team) Signed-off-by: Dave Airlie Signed-off-by: Paul Gortmaker --- drivers/gpu/drm/drm_irq.c | 3 ++- include/drm/drmP.h | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index a263b7070fc6..0ddd10995c46 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -545,7 +545,8 @@ int drm_modeset_ctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_modeset_ctl *modeset = data; - int crtc, ret = 0; + int ret = 0; + unsigned int crtc; /* If drm_vblank_init() hasn't been called yet, just no-op */ if (!dev->num_crtcs) diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 2f3b3a00b7a3..b447a35a91fc 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -1022,7 +1022,7 @@ struct drm_device { struct pci_controller *hose; #endif struct drm_sg_mem *sg; /**< Scatter gather memory */ - int num_crtcs; /**< Number of CRTCs on this device */ + unsigned int num_crtcs; /**< Number of CRTCs on this device */ void *dev_private; /**< device private data */ void *mm_private; struct address_space *dev_mapping; -- 2.39.5