[PATCH] register_chrdev_region() don't hand out the LOCAL/EXPERIMENTA…

…L majors As pointed out in http://bugzilla.kernel.org/show_bug.cgi?id=7922, dynamic chardev major allocation can hand out majors which LANANA has defined as being for local/experimental use. Cc: Torben Mathiasen <[email protected]> Cc: Greg KH <[email protected]> Cc: Al Viro <[email protected]> Cc: Tomas Klas <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
ambv · Feb 12, 2007 · 215122e · 215122e
1 parent 6ab8eb1
commit 215122e
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/fs/char_dev.c b/fs/char_dev.c
@@ -108,6 +108,13 @@ __register_chrdev_region(unsigned int major, unsigned int baseminor,
 	/* temporary */
 	if (major == 0) {
 		for (i = ARRAY_SIZE(chrdevs)-1; i > 0; i--) {
+			/*
+			 * Disallow the LANANA-assigned LOCAL/EXPERIMENTAL
+			 * majors
+			 */
+			if ((60 <= i && i <= 63) || (120 <= i && i <= 127) ||
+					(240 <= i && i <= 254))
+				continue;
 			if (chrdevs[i] == NULL)
 				break;
 		}