[PATCH] register_blkdev(): don't hand out the LOCAL/EXPERIMENTAL majors

As pointed out in http://bugzilla.kernel.org/show_bug.cgi?id=7922, dynamic blockdev 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]>
hjking · Feb 12, 2007 · fdf892b · fdf892b
1 parent 215122e
commit fdf892b
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/block/genhd.c b/block/genhd.c
@@ -61,6 +61,14 @@ int register_blkdev(unsigned int major, const char *name)
 	/* temporary */
 	if (major == 0) {
 		for (index = ARRAY_SIZE(major_names)-1; index > 0; index--) {
+			/*
+			 * Disallow the LANANA-assigned LOCAL/EXPERIMENTAL
+			 * majors
+			 */
+			if ((60 <= index && index <= 63) ||
+					(120 <= index && index <= 127) ||
+					(240 <= index && index <= 254))
+				continue;
 			if (major_names[index] == NULL)
 				break;
 		}