Commit fdf892be authored Feb 12, 2007 by Andrew Morton Committed by Linus Torvalds Feb 12, 2007

[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 <device@lanana.org>
Cc: Greg KH <greg@kroah.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Tomas Klas <tomas.klas@mepatek.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 215122e1

block/genhd.c

+8 −0

Original line number	Original line	Diff line number	Diff line
	@@ -61,6 +61,14 @@ int register_blkdev(unsigned int major, const char *name)
	/* temporary */		/* temporary */
	if (major == 0) {		if (major == 0) {
	for (index = ARRAY_SIZE(major_names)-1; index > 0; index--) {		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)		if (major_names[index] == NULL)
	break;		break;
	}		}