On 07/17, Jiri Slaby wrote:
>
> On 17. 07. 20, 12:45, Jiri Slaby wrote:
> > Hi,
> >
> > the strace testsuite triggers this on 5.8-rc4 and -rc5 both on x86_64
> > and i586:
>
> make check needs -jsomething, running is sequentially (-j1) doesn't
> trigger it. After the error, I cannot run anything. Like ps to find out
> what test caused the crash...
Strange... I'll try to reproduce but I can't do this till Monday.
Meanwhile, could you try the patch below? It needs CONFIG_DEBUG_ATOMIC_SLEEP.
Oleg.
diff --git a/kernel/signal.c b/kernel/signal.c
index ee22ec78fd6d..84782843eb1c 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1914,7 +1914,9 @@ bool do_notify_parent(struct task_struct *tsk, int sig)
BUG_ON(sig == -1);
/* do_notify_parent_cldstop should have been called instead. */
- BUG_ON(task_is_stopped_or_traced(tsk));
+ WARN(task_is_stopped_or_traced(tsk),
+ "exist with state=%ld set at %pS",
+ tsk->state, (void*)tsk->task_state_change);
BUG_ON(!tsk->ptrace &&
(tsk->group_leader != tsk || !thread_group_empty(tsk)));
@@ -2214,6 +2216,7 @@ static void ptrace_stop(int exit_code, int why, int
clear_code, kernel_siginfo_t
preempt_enable_no_resched();
freezable_schedule();
cgroup_leave_frozen(true);
+ WARN_ON(current->state);
} else {
/*
* By the time we got the lock, our tracer went away.
@@ -2393,6 +2396,7 @@ static bool do_signal_stop(int signr)
/* Now we don't run again until woken by SIGCONT or SIGKILL */
cgroup_enter_frozen();
freezable_schedule();
+ WARN_ON(current->state);
return true;
} else {
/*
