bpf: restrict unknown scalars of mixed signed bounds for unprivileged

[linux-2.6-microblaze.git] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index 07cddff..e2a5156 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -240,8 +240,10 @@ static unsigned long *alloc_thread_stack_node(struct task_struct *tsk, int node)
         * free_thread_stack() can be called in interrupt context,
         * so cache the vm_struct.
         */
-       if (stack)
+       if (stack) {
                tsk->stack_vm_area = find_vm_area(stack);
+               tsk->stack = stack;
+       }
        return stack;
 #else
        struct page *page = alloc_pages_node(node, THREADINFO_GFP,
@@ -288,7 +290,10 @@ static struct kmem_cache *thread_stack_cache;
 static unsigned long *alloc_thread_stack_node(struct task_struct *tsk,
                                                  int node)
 {
-       return kmem_cache_alloc_node(thread_stack_cache, THREADINFO_GFP, node);
+       unsigned long *stack;
+       stack = kmem_cache_alloc_node(thread_stack_cache, THREADINFO_GFP, node);
+       tsk->stack = stack;
+       return stack;
 }
 
 static void free_thread_stack(struct task_struct *tsk)