Btrfs: fix off-by-one in fiemap
lock_extent/unlock_extent expect an exclusive end. Tested-by: David Sterba <dsterba@suse.cz> Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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@ -3989,7 +3989,7 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
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last_for_get_extent = isize;
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}
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lock_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len, 0,
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lock_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len - 1, 0,
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&cached_state);
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em = get_extent_skip_holes(inode, start, last_for_get_extent,
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@ -4076,7 +4076,7 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
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out_free:
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free_extent_map(em);
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out:
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unlock_extent_cached(&BTRFS_I(inode)->io_tree, start, start + len,
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unlock_extent_cached(&BTRFS_I(inode)->io_tree, start, start + len - 1,
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&cached_state, GFP_NOFS);
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return ret;
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}
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