linux-kernel - [072/143] Increase OSF partition limit from 8 to 18

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Message-Id: <20110506002212.286653496@clark.kroah.org>
Date:	Thu, 05 May 2011 17:20:57 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk
Subject: [072/143] Increase OSF partition limit from 8 to 18

2.6.32-longterm review patch.  If anyone has any objections, please let us know.

------------------

From: Linus Torvalds <torvalds@...ux-foundation.org>

commit 34d211a2d5df4984a35b18d8ccacbe1d10abb067 upstream.

It turns out that while a maximum of 8 partitions may be what people
"should" have had, you can actually fit up to 18 entries(*) in a sector.

And some people clearly were taking advantage of that, like Michael
Cree, who had ten partitions on one of his OSF disks.

(*) The OSF partition data starts at byte offset 64 in the first sector,
    and the array of 16-byte partition entries start at offset 148 in
    the on-disk partition structure.

Reported-by: Michael Cree <mcree@...on.net.nz>
Cc: stable@...nel.org (v2.6.38)
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 fs/partitions/osf.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/partitions/osf.c
+++ b/fs/partitions/osf.c
@@ -10,7 +10,7 @@
 #include "check.h"
 #include "osf.h"
 
-#define MAX_OSF_PARTITIONS 8
+#define MAX_OSF_PARTITIONS 18
 
 int osf_partition(struct parsed_partitions *state, struct block_device *bdev)
 {


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