Ph II Erlotinib + Sirolimus for Pts w Recurrent Malignant Glioma Multiforme

Inclusion Criteria: * Pts have confirmed diagnosis of recurrent primary WHO grade IV malignant glioma (MG). Pts w recurrent disease whose diagnostic pathology confirmed GBM will not need re-biopsy. Pts w prior low-gr glioma / anaplastic glioma are eligible if histologic assessment demonstrates transformation to GBM * Age \>18 yrs * Interval of \>2 wk between prior surgical resection * Interval of \>12 wks between prior external-beam radiation therapy (XRT) unless there is either: histopathologic confirmation of recurrent tumor; new enhancement on MRI outside of XRT treatment field; / progressive radiographic changes after XRT/temo as well as after adjuvant, post-XRT temo * Interval of \>4 wks between chemo \& enrollment on protocol unless: unequivocal evidence of tumor progression; \& pt has recovered fully from all toxicity associated w prior surgery, XRT/chemo. Pts treated w chemo agents such as VP-16 who would normally be retreated after shorter intervals may be treated at usual starting time even if \<4 wks from last prior dose chemo * Karnofsky performance score \>= 70 percent * Hematocrit \>29 percent, absolute neutrophil count (ANC) \>1,500 cells/microliter, platelets \>100,000 cells/microliter * Serum creatinine \<1.5 mg/dl, serum glutamic oxaloacetic transaminase (SGOT) \& bilirubin \<1.5 x upper limit of normal (ULN); fasting plasma triglyceride \& cholesterol \< gr1 * For pts on corticosteroids, dose should not be increasing for \>7 days prior to baseline Gd-MRI of brain if medically appropriate * Pts in enzyme inducing antiepileptic drug cohort must be on stable dose of p450-inducing EIAED for \>2 wks. Pts in non-EIAED cohort must not receive any p450-EIAED for \>2 wks prior to \& during participation in trial * Signed informed consent approved by Institutional Review Board (IRB) prior to pt entry * If sexually active, pts will take contraceptive measures for duration of treatments \& for 3 months following discontinuation of Erlotinib * Pts who have had prior bevacizumab are eligible however interval of \>6 weeks must have elapsed since their last dose Exclusion Criteria: * Prior mammalian target of rapamycin (mTOR) directed therapy * Prior epidermal growth factor receptor (EGFR)-directed therapy * Female pts are pregnant/breast feeding, or adults of reproductive potential not employing effective method of birth control. Women of childbearing potential must have negative serum pregnancy test \<72 hours prior to administration of Erlotinib * Co-medication that may interfere w study results * Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection requiring IV antibiotics, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, hyperlipidemia not controlled w medication, psychiatric illness/social situations that would limit compliance w study requirements,/disorders associated w significant immunocompromise * Acute/chronic liver disease * Impairment of GI function/GI disease that may significantly alter absorption of Erlotinib * Pts who have received investigational drugs \<4 wks prior to entry on study or who have not recovered from toxic effects of such therapy * Pts who have received biologic, immunotherapeutic/cytostatic agents \<1 wk prior to entry on study/have not recovered from toxic effects of such therapy * Pt is \<5 yrs free of another primary malignancy except: if other primary malignancy is not currently clinically significant/requiring active intervention,/if other primary malignancy is basal cell skin cancer/cervical carcinoma in situ. Existence of any other malignant disease is not allowed * Pts have had any surgery other than resection of brain tumor \<2 wks prior to entry on study/have not recovered from side effects of such therapy * Pts unwilling to/unable to comply w protocol * Pts w acute/chronic renal insufficiency/those w acute renal insufficiency of any severity due to hepato-renal syndrome/in peri-operative liver transplantation period