From a52f4cd2b1a863a42c1cb268b1cddad451cdfede Mon Sep 17 00:00:00 2001 From: Liu Bo Date: Wed, 1 May 2013 16:23:41 +0000 Subject: Btrfs: fix off-by-one in fiemap lock_extent/unlock_extent expect an exclusive end. Tested-by: David Sterba Signed-off-by: Liu Bo Signed-off-by: Josef Bacik --- fs/btrfs/extent_io.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs') diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index d2ac518f90e..3e6e410002e 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -3989,7 +3989,7 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, last_for_get_extent = isize; } - lock_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len, 0, + lock_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len - 1, 0, &cached_state); em = get_extent_skip_holes(inode, start, last_for_get_extent, @@ -4076,7 +4076,7 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, out_free: free_extent_map(em); out: - unlock_extent_cached(&BTRFS_I(inode)->io_tree, start, start + len, + unlock_extent_cached(&BTRFS_I(inode)->io_tree, start, start + len - 1, &cached_state, GFP_NOFS); return ret; } -- cgit v1.2.3