From: Liu Bo <bo.li.liu@oracle.com>
Date: Mon, 7 Jan 2013 03:53:08 +0000 (+0000)
Subject: Btrfs: fix off-by-one in lseek
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=1214b53f90131fee1f950010c43e92455fe598ab;p=~shefty%2Frdma-dev.git

Btrfs: fix off-by-one in lseek

Lock end is inclusive.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 20452c110d7..fa48051484b 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -2242,6 +2242,7 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin)
 	if (lockend <= lockstart)
 		lockend = lockstart + root->sectorsize;
 
+	lockend--;
 	len = lockend - lockstart + 1;
 
 	len = max_t(u64, len, root->sectorsize);