RTEMS | posix aio functions can use (aio_request_type *)->suspendcbp unitialized (#5421)

[Allan Hessenflow (@allanhessenflow)]

Allan Hessenflow commented: https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5421#note_138613


Here's one method of fixing it:

```
diff --git a/cpukit/posix/src/aio_misc.c b/cpukit/posix/src/aio_misc.c
index 129836a918..8f986ffebe 100644
--- a/cpukit/posix/src/aio_misc.c
+++ b/cpukit/posix/src/aio_misc.c
@@ -203,6 +203,7 @@ rtems_aio_request *init_write_req( struct aiocb* aiocbp )
   req->aiocbp = aiocbp;
   req->op_type = AIO_OP_WRITE;
   req->listcbp = NULL;
+  req->suspendcbp = NULL;
 
   return req;
 }
@@ -250,6 +251,7 @@ rtems_aio_request *init_read_req( struct aiocb* aiocbp )
   req->aiocbp = aiocbp;
   req->op_type = AIO_OP_READ;
   req->listcbp = NULL;
+  req->suspendcbp = NULL;
 
   return req;
 }
```

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5421#note_138613
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