diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 67bcf83758c8..c4a08e8bc1c9 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -2299,6 +2299,13 @@ int udf_current_aext(struct inode *inode, struct extent_position *epos,
 		return -EINVAL;
 	}
 
+	if (eloc->partitionReferenceNum >= UDF_SB(inode->i_sb)->s_partitions) {
+		udf_debug("invalid partition reference %u (partitions %u)\n",
+			  eloc->partitionReferenceNum,
+			  UDF_SB(inode->i_sb)->s_partitions);
+		return -EFSCORRUPTED;
+	}
+
 	return 1;
 }