[failures] signal-trace_signal_deliver-when-signal_group_exit.patch removed from -mm tree

[akpm@xxxxxxxxxxxxxxxxxxxx]

The patch titled
     Subject: signal: trace_signal_deliver when signal_group_exit
has been removed from the -mm tree.  Its filename was
     signal-trace_signal_deliver-when-signal_group_exit.patch

This patch was dropped because it had testing failures

------------------------------------------------------
From: Zhenliang Wei <weizhenliang@xxxxxxxxxx>
Subject: signal: trace_signal_deliver when signal_group_exit

In the fixes commit, removing SIGKILL from each thread signal mask and
executing "goto fatal" directly will skip the call to
"trace_signal_deliver".  At this point, the delivery tracking of the
SIGKILL signal will be inaccurate.

Therefore, we need to add trace_signal_deliver before "goto fatal" after
executing sigdelset.

Note: The action[SIGKILL] must be SIG_DFL, and SEND_SIG_NOINFO matches the
fact that SIGKILL doesn't have any info.

Link: http://lkml.kernel.org/r/20190422145950.78056-1-weizhenliang@xxxxxxxxxx
Fixes: cf43a757fd4944 ("signal: Restore the stop PTRACE_EVENT_EXIT")
Signed-off-by: Zhenliang Wei <weizhenliang@xxxxxxxxxx>
Acked-by: Christian Brauner <christian@xxxxxxxxxx>
Reviewed-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Ivan Delalande <colona@xxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Deepa Dinamani <deepa.kernel@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 kernel/signal.c |    1 +
 1 file changed, 1 insertion(+)

--- a/kernel/signal.c~signal-trace_signal_deliver-when-signal_group_exit
+++ a/kernel/signal.c
@@ -2441,6 +2441,7 @@ relock:
 	if (signal_group_exit(signal)) {
 		ksig->info.si_signo = signr = SIGKILL;
 		sigdelset(&current->pending.signal, SIGKILL);
+		trace_signal_deliver(SIGKILL, SEND_SIG_NOINFO, SIG_DFL);
 		recalc_sigpending();
 		goto fatal;
 	}
_

Patches currently in -mm which might be from weizhenliang@xxxxxxxxxx are