From owner-svn-src-head@freebsd.org Mon Sep 17 14:59:06 2018 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 0AECF109F766; Mon, 17 Sep 2018 14:59:06 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id B13C47F409; Mon, 17 Sep 2018 14:59:05 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id AB8A31282F; Mon, 17 Sep 2018 14:59:05 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w8HEx5dZ023399; Mon, 17 Sep 2018 14:59:05 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w8HEx5gt023398; Mon, 17 Sep 2018 14:59:05 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201809171459.w8HEx5gt023398@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Mon, 17 Sep 2018 14:59:05 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r338711 - head/sys/amd64/amd64 X-SVN-Group: head X-SVN-Commit-Author: kib X-SVN-Commit-Paths: head/sys/amd64/amd64 X-SVN-Commit-Revision: 338711 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Sep 2018 14:59:06 -0000 Author: kib Date: Mon Sep 17 14:59:05 2018 New Revision: 338711 URL: https://svnweb.freebsd.org/changeset/base/338711 Log: Make the PTI violation check to follow style of the SMAP check. No functional changes. Reviewed by: alc, markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Approved by: re (rgrimes) Differential revision: https://reviews.freebsd.org/D17181 Modified: head/sys/amd64/amd64/trap.c Modified: head/sys/amd64/amd64/trap.c ============================================================================== --- head/sys/amd64/amd64/trap.c Mon Sep 17 14:53:03 2018 (r338710) +++ head/sys/amd64/amd64/trap.c Mon Sep 17 14:59:05 2018 (r338711) @@ -705,6 +705,17 @@ trap_is_smap(struct trapframe *frame) PGEX_P && (frame->tf_rflags & PSL_AC) == 0); } +static bool +trap_is_pti(struct trapframe *frame) +{ + + return (PCPU_GET(curpmap)->pm_ucr3 != PMAP_NO_CR3 && + pg_nx != 0 && (frame->tf_err & (PGEX_P | PGEX_W | + PGEX_U | PGEX_I)) == (PGEX_P | PGEX_U | PGEX_I) && + (curpcb->pcb_saved_ucr3 & ~CR3_PCID_MASK) == + (PCPU_GET(curpmap)->pm_cr3 & ~CR3_PCID_MASK)); +} + static int trap_pfault(struct trapframe *frame, int usermode) { @@ -806,11 +817,7 @@ trap_pfault(struct trapframe *frame, int usermode) * If nx protection of the usermode portion of kernel page * tables caused trap, panic. */ - if (usermode && PCPU_GET(curpmap)->pm_ucr3 != PMAP_NO_CR3 && - pg_nx != 0 && (frame->tf_err & (PGEX_P | PGEX_W | - PGEX_U | PGEX_I)) == (PGEX_P | PGEX_U | PGEX_I) && - (curpcb->pcb_saved_ucr3 & ~CR3_PCID_MASK)== - (PCPU_GET(curpmap)->pm_cr3 & ~CR3_PCID_MASK)) + if (usermode && trap_is_pti(frame)) panic("PTI: pid %d comm %s tf_err %#lx", p->p_pid, p->p_comm, frame->tf_err);