The patch titled
Subject: signal: trace_signal_deliver when signal_group_exit
has been added to the -mm tree. Its filename is
signal-trace_signal_deliver-when-signal_group_exit.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/signal-trace_signal_deliver-when-signal_group_exit.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/signal-trace_signal_deliver-when-signal_group_exit.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
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(¤t->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
signal-trace_signal_deliver-when-signal_group_exit.patch
