1 files changed, 3 insertions, 0 deletions

diff --git a/fs/xfs/libxfs/xfs_rtbitmap.c b/fs/xfs/libxfs/xfs_rtbitmap.c
index 106be2d0bb88..7712f282d172 100644
--- a/fs/xfs/libxfs/xfs_rtbitmap.c
+++ b/fs/xfs/libxfs/xfs_rtbitmap.c
@@ -90,6 +90,9 @@ xfs_rtbuf_get(
         if (error)
                 return error;
 
+        if (nmap == 0 || !xfs_bmap_is_real_extent(&map))
+                return -EFSCORRUPTED;
+
         ASSERT(map.br_startblock != NULLFSBLOCK);
         error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
                                    XFS_FSB_TO_DADDR(mp, map.br_startblock),