From c53a074639dd8b3b1cdadd80e6860b2a7ade95f7 Mon Sep 17 00:00:00 2001
From: gonzo <gonzo@FreeBSD.org>
Date: Sun, 3 Feb 2019 14:56:38 +0000
Subject: [PATCH] MFC r343060:

[drm] Fix off-by-one error when accessing driver-specific ioctl handlers array

PR:		231513
Submitted by:	Young_X <YangX92@hotmail.com>
Approved by:	imp
---
 sys/dev/drm/drm_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/dev/drm/drm_drv.c b/sys/dev/drm/drm_drv.c
index 20d7d973aed1..bf8065accdb0 100644
--- 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;