[PATCH] pacct: avoidance to refer the last thread as a representation of the process

When pacct facility generate an 'ac_flag' field in accounting record, it
refers a task_struct of the thread which died last in the process.  But any
other task_structs are ignored.

Therefore, pacct facility drops ASU flag even if root-privilege operations are
used by any other threads except the last one.  In addition, AFORK flag is
always set when the thread of group-leader didn't die last, although this
process has called execve() after fork().

We have a same matter in ac_exitcode.  The recorded ac_exitcode is an exit
code of the last thread in the process.  There is a possibility this exitcode
is not the group leader's one.

1 files changed, 2 insertions, 2 deletions

diff --git a/kernel/exit.c b/kernel/exit.c
index 819d82c2efba..e76bd02e930e 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -894,8 +894,8 @@ fastcall NORET_TYPE void do_exit(long code)
         if (group_dead) {
                 hrtimer_cancel(&tsk->signal->real_timer);
                 exit_itimers(tsk->signal);
-                acct_collect();
         }
+        acct_collect(code, group_dead);
         if (unlikely(tsk->robust_list))
                 exit_robust_list(tsk);
 #if defined(CONFIG_FUTEX) && defined(CONFIG_COMPAT)
@@ -907,7 +907,7 @@ fastcall NORET_TYPE void do_exit(long code)
         exit_mm(tsk);
 
         if (group_dead)
-                acct_process(code);
+                acct_process();
         exit_sem(tsk);
         __exit_files(tsk);
         __exit_fs(tsk);