task_stopped_code()->task_is_stopped_or_traced() doesn't look right, the traced task must never be TASK_STOPPED.
We can not add WARN_ON(task_is_stopped(p)), but this is only because do_wait() can race with PTRACE_ATTACH from another thread. Signed-off-by: Oleg Nesterov <[email protected]> --- kernel/exit.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kernel/exit.c b/kernel/exit.c index c090738..fc7b4ec 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -1127,7 +1127,7 @@ static int wait_task_zombie(struct wait_opts *wo, struct task_struct *p) static int *task_stopped_code(struct task_struct *p, bool ptrace) { if (ptrace) { - if (task_is_stopped_or_traced(p) && + if (task_is_traced(p) && !(p->jobctl & JOBCTL_LISTENING)) return &p->exit_code; } else { -- 1.5.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
