MIPS: VDSO: Prevent use of smp_processor_id()

[android-x86/kernel.git] / kernel / exit.c

diff --git a/kernel/exit.c b/kernel/exit.c
index 9d68c45..d9394fc 100644 (file)
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -525,12 +525,14 @@ static struct task_struct *find_alive_thread(struct task_struct *p)
        return NULL;
 }
 
-static struct task_struct *find_child_reaper(struct task_struct *father)
+static struct task_struct *find_child_reaper(struct task_struct *father,
+                                               struct list_head *dead)
        __releases(&tasklist_lock)
        __acquires(&tasklist_lock)
 {
        struct pid_namespace *pid_ns = task_active_pid_ns(father);
        struct task_struct *reaper = pid_ns->child_reaper;
+       struct task_struct *p, *n;
 
        if (likely(reaper != father))
                return reaper;
@@ -546,6 +548,12 @@ static struct task_struct *find_child_reaper(struct task_struct *father)
                panic("Attempted to kill init! exitcode=0x%08x\n",
                        father->signal->group_exit_code ?: father->exit_code);
        }
+
+       list_for_each_entry_safe(p, n, dead, ptrace_entry) {
+               list_del_init(&p->ptrace_entry);
+               release_task(p);
+       }
+
        zap_pid_ns_processes(pid_ns);
        write_lock_irq(&tasklist_lock);
 
@@ -632,7 +640,7 @@ static void forget_original_parent(struct task_struct *father,
                exit_ptrace(father, dead);
 
        /* Can drop and reacquire tasklist_lock */
-       reaper = find_child_reaper(father);
+       reaper = find_child_reaper(father, dead);
        if (list_empty(&father->children))
                return;
 
@@ -836,6 +844,7 @@ void __noreturn do_exit(long code)
         */
        perf_event_exit_task(tsk);
 
+       sched_autogroup_exit_task(tsk);
        cgroup_exit(tsk);
 
        /*
@@ -1661,6 +1670,10 @@ SYSCALL_DEFINE4(wait4, pid_t, upid, int __user *, stat_addr,
                        __WNOTHREAD|__WCLONE|__WALL))
                return -EINVAL;
 
+       /* -INT_MIN is not defined */
+       if (upid == INT_MIN)
+               return -ESRCH;
+
        if (upid == -1)
                type = PIDTYPE_MAX;
        else if (upid < 0) {