xnu-4903.241.1.tar.gz

[apple/xnu.git] / osfmk / kern / task.c

diff --git a/osfmk/kern/task.c b/osfmk/kern/task.c
index c80e30d300b2be3a73867afd091bf97153521d74..792daf7bc24c62b8e285ffdeec2db4431ed9ea9e 100644 (file)
--- a/osfmk/kern/task.c
+++ b/osfmk/kern/task.c
@@ -6003,15 +6003,18 @@ task_set_mach_voucher(
 
 kern_return_t
 task_swap_mach_voucher(
-       task_t                  task,
-       ipc_voucher_t           new_voucher,
-       ipc_voucher_t           *in_out_old_voucher)
+       __unused task_t         task,
+       __unused ipc_voucher_t  new_voucher,
+       ipc_voucher_t          *in_out_old_voucher)
 {
-       if (TASK_NULL == task)
-               return KERN_INVALID_TASK;
-
-       *in_out_old_voucher = new_voucher;
-       return KERN_SUCCESS;
+       /*
+        * Currently this function is only called from a MIG generated
+        * routine which doesn't release the reference on the voucher
+        * addressed by in_out_old_voucher. To avoid leaking this reference,
+        * a call to release it has been added here.
+        */
+       ipc_voucher_release(*in_out_old_voucher);
+       return KERN_NOT_SUPPORTED;
 }
 
 void task_set_gpu_denied(task_t task, boolean_t denied)