From 10ebf9565f69760e46a8f271e22c5367d54e10ff Mon Sep 17 00:00:00 2001 From: Justus Winter Date: Thu, 26 Oct 2017 17:38:30 +0200 Subject: kern: Fix crash. Check receiver in task_create. Fixes a crash when sending that message to a non-task port. * kern/bootstrap.c (boot_script_task_create): Use the new function. * kern/task.c (task_create): Rename to task_create_internal, create a new function in its place that checks the receiver first. * kern/task.h (task_create_internal): New prototype. --- kern/task.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) (limited to 'kern/task.c') diff --git a/kern/task.c b/kern/task.c index 1874af69..681ce872 100644 --- a/kern/task.c +++ b/kern/task.c @@ -73,15 +73,41 @@ void task_init(void) * Task_create must assign to kernel_task as a side effect, * for other initialization. (:-() */ - (void) task_create(TASK_NULL, FALSE, &kernel_task); + (void) task_create_kernel(TASK_NULL, FALSE, &kernel_task); (void) task_set_name(kernel_task, "gnumach"); vm_map_set_name(kernel_map, kernel_task->name); } +int +task_ledger_acquire (task_t task, enum ledger_kind kind) +{ + return ledger_acquire (task->ledgers, kind); +} + +void +task_ledger_release (task_t task, enum ledger_kind kind) +{ + ledger_release (task->ledgers, kind); +} + + kern_return_t task_create( task_t parent_task, boolean_t inherit_memory, task_t *child_task) /* OUT */ +{ + if (parent_task == TASK_NULL) + return KERN_INVALID_TASK; + + return task_create_kernel (parent_task, inherit_memory, + child_task); +} + +kern_return_t +task_create_kernel( + task_t parent_task, + boolean_t inherit_memory, + task_t *child_task) /* OUT */ { task_t new_task; processor_set_t pset; -- cgit v1.2.3