SGX: zero-initialize reserved memory in os_mmap after allocation

ikehara · ikehara · commit f4a491f88440 · 2025-09-26T08:31:06.000+09:00
diff --git a/core/shared/platform/linux-sgx/sgx_platform.c b/core/shared/platform/linux-sgx/sgx_platform.c
@@ -161,6 +161,8 @@ os_mmap(void *hint, size_t size, int prot, int flags, os_file_handle file)
         return NULL;
     }
 
+    memset(ret, 0, aligned_size);
+
     if (prot & MMAP_PROT_READ)
         mprot |= SGX_PROT_READ;
     if (prot & MMAP_PROT_WRITE)

Original file line number	Diff line number	Diff line change
`@@ -161,6 +161,8 @@ os_mmap(void *hint, size_t size, int prot, int flags, os_file_handle file)`
`161`	`161`	`return NULL;`
`162`	`162`	`}`
`163`	`163`
	`164`	`+ memset(ret, 0, aligned_size);`
	`165`	`+`
`164`	`166`	`if (prot & MMAP_PROT_READ)`
`165`	`167`	`mprot \|= SGX_PROT_READ;`
`166`	`168`	`if (prot & MMAP_PROT_WRITE)`