diff options
Diffstat (limited to 'kernel/taskstats.c')
| -rw-r--r-- | kernel/taskstats.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/kernel/taskstats.c b/kernel/taskstats.c index e78187657330..b90b2a7ef600 100644 --- a/kernel/taskstats.c +++ b/kernel/taskstats.c @@ -229,14 +229,17 @@ static int fill_tgid(pid_t tgid, struct task_struct *tgidtsk, } else get_task_struct(first); - /* Start with stats from dead tasks */ - spin_lock_irqsave(&first->signal->stats_lock, flags); - if (first->signal->stats) - memcpy(stats, first->signal->stats, sizeof(*stats)); - spin_unlock_irqrestore(&first->signal->stats_lock, flags); tsk = first; read_lock(&tasklist_lock); + /* Start with stats from dead tasks */ + if (first->signal) { + spin_lock_irqsave(&first->signal->stats_lock, flags); + if (first->signal->stats) + memcpy(stats, first->signal->stats, sizeof(*stats)); + spin_unlock_irqrestore(&first->signal->stats_lock, flags); + } + do { if (tsk->exit_state == EXIT_ZOMBIE && thread_group_leader(tsk)) continue; @@ -256,7 +259,7 @@ static int fill_tgid(pid_t tgid, struct task_struct *tgidtsk, * Accounting subsytems can also add calls here to modify * fields of taskstats. */ - + put_task_struct(first); return 0; } |