From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:53648 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752125AbeAFLKZ (ORCPT ); Sat, 6 Jan 2018 06:10:25 -0500 Subject: Patch "kernel/signal.c: protect the SIGNAL_UNKILLABLE tasks from !sig_kernel_only() signals" has been added to the 4.9-stable tree To: oleg@redhat.com, akpm@linux-foundation.org, gregkh@linuxfoundation.org, me@kylehuey.com, torvalds@linux-foundation.org Cc: , From: Date: Sat, 06 Jan 2018 12:10:29 +0100 Message-ID: <15152370292147@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled kernel/signal.c: protect the SIGNAL_UNKILLABLE tasks from !sig_kernel_only() signals to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: kernel-signal.c-protect-the-signal_unkillable-tasks-from-sig_kernel_only-signals.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From ac25385089f673560867eb5179228a44ade0cfc1 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 17 Nov 2017 15:30:04 -0800 Subject: kernel/signal.c: protect the SIGNAL_UNKILLABLE tasks from !sig_kernel_only() signals From: Oleg Nesterov commit ac25385089f673560867eb5179228a44ade0cfc1 upstream. Change sig_task_ignored() to drop the SIG_DFL && !sig_kernel_only() signals even if force == T. This simplifies the next change and this matches the same check in get_signal() which will drop these signals anyway. Link: http://lkml.kernel.org/r/20171103184227.GC21036@redhat.com Signed-off-by: Oleg Nesterov Tested-by: Kyle Huey Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- kernel/signal.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/signal.c +++ b/kernel/signal.c @@ -72,7 +72,7 @@ static int sig_task_ignored(struct task_ handler = sig_handler(t, sig); if (unlikely(t->signal->flags & SIGNAL_UNKILLABLE) && - handler == SIG_DFL && !force) + handler == SIG_DFL && !(force && sig_kernel_only(sig))) return 1; return sig_handler_ignored(handler, sig); Patches currently in stable-queue which might be from oleg@redhat.com are queue-4.9/kernel-signal.c-remove-the-no-longer-needed-signal_unkillable-check-in-complete_signal.patch queue-4.9/kernel-signal.c-protect-the-signal_unkillable-tasks-from-sig_kernel_only-signals.patch queue-4.9/kernel-acct.c-fix-the-acct-needcheck-check-in-check_free_space.patch queue-4.9/kernel-signal.c-protect-the-traced-signal_unkillable-tasks-from-sigkill.patch