Commit 215122e1 authored Feb 12, 2007 by Andrew Morton Committed by Linus Torvalds Feb 12, 2007

[PATCH] register_chrdev_region() don't hand out the LOCAL/EXPERIMENTAL 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 <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 6ab8eb1c

fs/char_dev.c

+7 −0

Original line number	Original line	Diff line number	Diff line
	@@ -108,6 +108,13 @@ __register_chrdev_region(unsigned int major, unsigned int baseminor,
	/* temporary */		/* temporary */
	if (major == 0) {		if (major == 0) {
	for (i = ARRAY_SIZE(chrdevs)-1; i > 0; i--) {		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)		if (chrdevs[i] == NULL)
	break;		break;
	}		}