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authorJan Kara <jack@suse.cz>2017-05-18 16:36:23 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-06-07 12:07:53 +0200
commit11214bd292ec95c52f636c187b15c9160215f988 (patch)
treee9f464b5f8de23809755dd6f56ba600b042e9e8b
parent75c5afd58d4696b4dce6ed931c49da9975962f99 (diff)
xfs: Fix off-by-in in loop termination in xfs_find_get_desired_pgoff()
commit d7fd24257aa60316bf81093f7f909dc9475ae974 upstream. There is an off-by-one error in loop termination conditions in xfs_find_get_desired_pgoff() since 'end' may index a page beyond end of desired range if 'endoff' is page aligned. It doesn't have any visible effects but still it is good to fix it. Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--fs/xfs/xfs_file.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 9292a59efbfa..a90ec3fad69f 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -1130,7 +1130,7 @@ xfs_find_get_desired_pgoff(
index = startoff >> PAGE_SHIFT;
endoff = XFS_FSB_TO_B(mp, map->br_startoff + map->br_blockcount);
- end = endoff >> PAGE_SHIFT;
+ end = (endoff - 1) >> PAGE_SHIFT;
do {
int want;
unsigned nr_pages;