fbdev fix for v4.16-rc5:

- fix kernel data leak in FBIOGETCMAP_SPARC ioctl (Peter Malone)
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Merge tag 'fbdev-v4.16-rc5' of git://github.com/bzolnier/linux

Pull fbdev fix from Bartlomiej Zolnierkiewicz:
 "Just a single fix to close a kernel data leak in FBIOGETCMAP_SPARC
  ioctl"

* tag 'fbdev-v4.16-rc5' of git://github.com/bzolnier/linux:
  fbdev: Fixing arbitrary kernel leak in case FBIOGETCMAP_SPARC in sbusfb_ioctl_helper().

drivers/video/fbdev/sbuslib.c

@@ -122,7 +122,7 @@ int sbusfb_ioctl_helper(unsigned long cmd, unsigned long arg,
 		unsigned char __user *ured;
 		unsigned char __user *ugreen;
 		unsigned char __user *ublue;
-		int index, count, i;
+		unsigned int index, count, i;
 
 		if (get_user(index, &c->index) ||
 		    __get_user(count, &c->count) ||
@@ -161,7 +161,7 @@ int sbusfb_ioctl_helper(unsigned long cmd, unsigned long arg,
 		unsigned char __user *ugreen;
 		unsigned char __user *ublue;
 		struct fb_cmap *cmap = &info->cmap;
-		int index, count, i;
+		unsigned int index, count, i;
 		u8 red, green, blue;
 
 		if (get_user(index, &c->index) ||