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-rw-r--r--fs/xfs/xfs_bmap.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index f3a3768189bb..3e9c278a8f78 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -4487,6 +4487,16 @@ xfs_bmapi(
/* 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,