tpm: Make sure the locality received from backend is valid

Make sure that the locality passed from the backend to
tpm_tis_request_completed() is valid.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
(cherry picked from commit a639f96111eadb3b8e3021fd3f27e2948ad1c640)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c
index 9a795ce96c5523d57c2647a2ed5e54010b5047cf..15540267883d4dd4aa2e9aa9aef9c9b56eec191e 100644 (file)
--- a/hw/tpm/tpm_tis.c
+++ b/hw/tpm/tpm_tis.c
@@ -295,6 +295,8 @@ static void tpm_tis_request_completed(TPMIf *ti, int ret)
     uint8_t locty = s->cmd.locty;
     uint8_t l;
 
+    assert(TPM_TIS_IS_VALID_LOCTY(locty));
+
     if (s->cmd.selftest_done) {
         for (l = 0; l < TPM_TIS_NUM_LOCALITIES; l++) {
             s->loc[l].sts |= TPM_TIS_STS_SELFTEST_DONE;