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

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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>
This commit is contained in:
Andrew Morton 2007-02-12 00:51:44 -08:00 committed by Linus Torvalds
parent 215122e111
commit fdf892be32
1 changed files with 8 additions and 0 deletions
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8
block/genhd.c
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@ -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;
}