From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 85CD7C2D0EB for ; Mon, 30 Mar 2020 10:21:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 66141206DB for ; Mon, 30 Mar 2020 10:21:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729327AbgC3KVF (ORCPT ); Mon, 30 Mar 2020 06:21:05 -0400 Received: from mx01.bbu.dsd.mx.bitdefender.com ([91.199.104.161]:43776 "EHLO mx01.bbu.dsd.mx.bitdefender.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729633AbgC3KUD (ORCPT ); Mon, 30 Mar 2020 06:20:03 -0400 Received: from smtp.bitdefender.com (smtp02.buh.bitdefender.net [10.17.80.76]) by mx01.bbu.dsd.mx.bitdefender.com (Postfix) with ESMTPS id AC2A5305FFAD; Mon, 30 Mar 2020 13:12:57 +0300 (EEST) Received: from localhost.localdomain (unknown [91.199.104.28]) by smtp.bitdefender.com (Postfix) with ESMTPSA id 6F084305B7A0; Mon, 30 Mar 2020 13:12:57 +0300 (EEST) From: =?UTF-8?q?Adalbert=20Laz=C4=83r?= To: kvm@vger.kernel.org Cc: virtualization@lists.linux-foundation.org, Paolo Bonzini , =?UTF-8?q?Mihai=20Don=C8=9Bu?= , =?UTF-8?q?Adalbert=20Laz=C4=83r?= Subject: [PATCH v8 55/81] KVM: introspection: add crash action handling on event reply Date: Mon, 30 Mar 2020 13:12:42 +0300 Message-Id: <20200330101308.21702-56-alazar@bitdefender.com> In-Reply-To: <20200330101308.21702-1-alazar@bitdefender.com> References: <20200330101308.21702-1-alazar@bitdefender.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Mihai Donțu This action is used in extreme cases such as blocking the spread of malware as quickly as possible. Signed-off-by: Mihai Donțu Signed-off-by: Adalbert Lazăr --- virt/kvm/introspection/kvmi.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/virt/kvm/introspection/kvmi.c b/virt/kvm/introspection/kvmi.c index 2b8e6910e57b..517e77ab39c2 100644 --- a/virt/kvm/introspection/kvmi.c +++ b/virt/kvm/introspection/kvmi.c @@ -707,10 +707,38 @@ void kvmi_run_jobs(struct kvm_vcpu *vcpu) } } +static int kvmi_vcpu_kill(int sig, struct kvm_vcpu *vcpu) +{ + struct kernel_siginfo siginfo[1] = {}; + int err = -ESRCH; + struct pid *pid; + + rcu_read_lock(); + pid = rcu_dereference(vcpu->pid); + if (pid) + err = kill_pid_info(sig, siginfo, pid); + rcu_read_unlock(); + + return err; +} + +static void kvmi_vm_shutdown(struct kvm *kvm) +{ + struct kvm_vcpu *vcpu; + int i; + + kvm_for_each_vcpu(i, vcpu, kvm) + kvmi_vcpu_kill(SIGTERM, vcpu); +} + void kvmi_handle_common_event_actions(struct kvm *kvm, u32 action, const char *str) { switch (action) { + case KVMI_EVENT_ACTION_CRASH: + kvmi_vm_shutdown(kvm); + break; + default: kvmi_err(KVMI(kvm), "Unsupported action %d for event %s\n", action, str);