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Message-Id: <20100510223537.027223166@kvm.kroah.org>
Date: Mon, 10 May 2010 15:34:41 -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,
Joel Becker <joel.becker@...cle.com>
Subject: [29/98] ocfs2_dlmfs: Fix math error when reading LVB.
2.6.32-stable review patch. If anyone has any objections, please let us know.
------------------
From: Joel Becker <joel.becker@...cle.com>
commit a36d515c7a2dfacebcf41729f6812dbc424ebcf0 upstream.
When asked for a partial read of the LVB in a dlmfs file, we can
accidentally calculate a negative count.
Reported-by: Dan Carpenter <error27@...il.com>
Signed-off-by: Joel Becker <joel.becker@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
fs/ocfs2/dlm/dlmfs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/ocfs2/dlm/dlmfs.c
+++ b/fs/ocfs2/dlm/dlmfs.c
@@ -205,7 +205,7 @@ static ssize_t dlmfs_file_read(struct fi
if ((count + *ppos) > i_size_read(inode))
readlen = i_size_read(inode) - *ppos;
else
- readlen = count - *ppos;
+ readlen = count;
lvb_buf = kmalloc(readlen, GFP_NOFS);
if (!lvb_buf)
--
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