MFC r343060:

[drm] Fix off-by-one error when accessing driver-specific ioctl handlers array PR: 231513 Submitted by: Young_X <[email protected]> Approved by: imp
HardenedBSD · Feb 3, 2019 · c53a074 · c53a074
1 parent a4b3d87
commit c53a074
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/sys/dev/drm/drm_drv.c b/sys/dev/drm/drm_drv.c
@@ -745,7 +745,7 @@ int drm_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int flags,
 	if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
 		/* The array entries begin at DRM_COMMAND_BASE ioctl nr */
 		nr -= DRM_COMMAND_BASE;
-		if (nr > dev->driver->max_ioctl) {
+		if (nr >= dev->driver->max_ioctl) {
 			DRM_DEBUG("Bad driver ioctl number, 0x%x (of 0x%x)\n",
 			    nr, dev->driver->max_ioctl);
 			return EINVAL;