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D19595.1793714595.diff
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Index: sys/amd64/sgx/sgx.c
===================================================================
--- sys/amd64/sgx/sgx.c
+++ sys/amd64/sgx/sgx.c
@@ -1075,6 +1075,12 @@
(cp[2] & 0xfffff000);
sc->npages = sc->epc_size / SGX_PAGE_SIZE;
+ if (sc->epc_size == 0 || sc->epc_base == 0) {
+ printf("%s: Incorrect EPC data: EPC base %lx, size %lu\n",
+ __func__, sc->epc_base, sc->epc_size);
+ return (EINVAL);
+ }
+
if (cp[3] & 0xffff)
sc->enclave_size_max = (1 << ((cp[3] >> 8) & 0xff));
else

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