diff options
Diffstat (limited to 'common/uapi/ipc.c')
| -rw-r--r-- | common/uapi/ipc.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/common/uapi/ipc.c b/common/uapi/ipc.c index d71f53c..1596169 100644 --- a/common/uapi/ipc.c +++ b/common/uapi/ipc.c @@ -155,6 +155,11 @@ static struct stack_diff enter_rpc(struct tcb *t, struct sys_ret a) */ static void leave_rpc(struct tcb *t, struct sys_ret a) { + /* if we're not in an rpc, the user messed something up. */ + /** @todo choose or come up with more fitting error value. */ + if (!is_rpc(t)) + return_args(t, SYS_RET1(ERR_MISC)); + vm_t rpc_stack = t->rpc_stack + BASE_PAGE_SIZE; struct call_ctx *ctx = (struct call_ctx *)(rpc_stack) - 1; t->regs = ctx->regs; |