diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index f3a3768..3e9c278 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -4487,6 +4487,16 @@
 				/* Figure out the extent size, adjust alen */
 				extsz = xfs_get_extsz_hint(ip);
 				if (extsz) {
+					/*
+					 * make sure we don't exceed a single
+					 * extent length when we align the
+					 * extent by reducing length we are
+					 * going to allocate by the maximum
+					 * amount extent size aligment may
+					 * require.
+					 */
+					alen = XFS_FILBLKS_MIN(len,
+						   MAXEXTLEN - (2 * extsz - 1));
 					error = xfs_bmap_extsize_align(mp,
 							&got, &prev, extsz,
 							rt, eof,