Author: gonzo
Date: Tue Jan 15 21:06:58 2019
New Revision: 343060
URL: https://svnweb.freebsd.org/changeset/base/343060
Log:
[drm] Fix off-by-one error when accessing driver-specific ioctl handlers array
PR: 231513
Submitted by: Young_X <yang...@hotmail.com>
Approved by: imp
MFC after: 1 week
Modified:
head/sys/dev/drm/drm_drv.c
Modified: head/sys/dev/drm/drm_drv.c
==============================================================================
--- head/sys/dev/drm/drm_drv.c Tue Jan 15 20:27:21 2019 (r343059)
+++ head/sys/dev/drm/drm_drv.c Tue Jan 15 21:06:58 2019 (r343060)
@@ -745,7 +745,7 @@ int drm_ioctl(struct cdev *kdev, u_long cmd, caddr_t d
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;
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