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Date:   Mon, 11 Feb 2019 17:47:56 +0100
From:   Oleg Nesterov <>
To:     "Eric W. Biederman" <>
Cc:     Linus Torvalds <>,, Dmitry Vyukov <>,
        Jack Andersen <>,
        Christian Brauner <>,
        Kees Cook <>,
        Thomas Gleixner <>
Subject: Re: [GIT PULL] signal fixes for v5.0-rc6

On 02/08, Eric W. Biederman wrote:
>       signal: Always notice exiting tasks

Sorry, I could not look at these patches before...

So I think this one should be reverted, it makes PTRACE_EVENT_EXIT even more broken.

Once again, why we can't do something like

	--- x/kernel/signal.c
	+++ x/kernel/signal.c
	@@ -209,6 +209,8 @@ int next_signal(struct sigpending *pendi
		x = *s &~ *m;
		if (x) {
	+		if (x & sigmask(SIGKILL))
	+			return SIGKILL;
			sig = ffz(~x) + 1;

instead? at least for the start.


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