Fix ext2fs_extent_insert when at last extent in node

ext2fs_extent_insert() only did a memmove if path->left
was > 0, but if we are at the last extent in the node,
path->left == 0, and this node must be moved before the
current extent is replaced with the newly inserted node.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/lib/ext2fs/extent.c b/lib/ext2fs/extent.c
index 76f6f6563ddee1252cd7b68cc942cfef4f3fdd3a..9f19e7b614a44c5517752f689286ed5dbcf300f0 100644 (file)
--- a/lib/ext2fs/extent.c
+++ b/lib/ext2fs/extent.c
@@ -689,7 +689,7 @@ errcode_t ext2fs_extent_insert(ext2_extent_handle_t handle, int flags,
 
        path->curr = ix;
 
-       if (path->left > 0)
+       if (path->left >= 0)
                memmove(ix + 1, ix,
                        (path->left+1) * sizeof(struct ext3_extent_idx));
        path->left++;