Module Name: src Committed By: alnsn Date: Thu Apr 26 18:54:09 UTC 2018
Modified Files: src/sys/arch/x86/x86: svs.c src/sys/secmodel/securelevel: secmodel_securelevel.c src/sys/secmodel/suser: secmodel_suser.c src/sys/sys: kauth.h Log Message: Add KAUTH_MACHDEP_SVS_DISABLE and add support to secmodel_securelevel(9). Disabling SVS is denied at securelevel 1 and above. To generate a diff of this commit: cvs rdiff -u -r1.17 -r1.18 src/sys/arch/x86/x86/svs.c cvs rdiff -u -r1.30 -r1.31 \ src/sys/secmodel/securelevel/secmodel_securelevel.c cvs rdiff -u -r1.43 -r1.44 src/sys/secmodel/suser/secmodel_suser.c cvs rdiff -u -r1.75 -r1.76 src/sys/sys/kauth.h Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.
Modified files: Index: src/sys/arch/x86/x86/svs.c diff -u src/sys/arch/x86/x86/svs.c:1.17 src/sys/arch/x86/x86/svs.c:1.18 --- src/sys/arch/x86/x86/svs.c:1.17 Fri Mar 30 19:58:05 2018 +++ src/sys/arch/x86/x86/svs.c Thu Apr 26 18:54:09 2018 @@ -1,4 +1,4 @@ -/* $NetBSD: svs.c,v 1.17 2018/03/30 19:58:05 maxv Exp $ */ +/* $NetBSD: svs.c,v 1.18 2018/04/26 18:54:09 alnsn Exp $ */ /* * Copyright (c) 2018 The NetBSD Foundation, Inc. @@ -30,7 +30,7 @@ */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: svs.c,v 1.17 2018/03/30 19:58:05 maxv Exp $"); +__KERNEL_RCSID(0, "$NetBSD: svs.c,v 1.18 2018/04/26 18:54:09 alnsn Exp $"); #include "opt_svs.h" @@ -38,6 +38,7 @@ __KERNEL_RCSID(0, "$NetBSD: svs.c,v 1.17 #include <sys/systm.h> #include <sys/proc.h> #include <sys/cpu.h> +#include <sys/kauth.h> #include <sys/sysctl.h> #include <sys/xcall.h> @@ -737,11 +738,13 @@ sysctl_machdep_svs_enabled(SYSCTLFN_ARGS error = 0; else error = EOPNOTSUPP; - } else { - if (svs_enabled) + } else if (svs_enabled) { + error = kauth_authorize_machdep(kauth_cred_get(), + KAUTH_MACHDEP_SVS_DISABLE, NULL, NULL, NULL, NULL); + if (!error) error = svs_disable(); - else - error = 0; + } else { + error = 0; } return error; Index: src/sys/secmodel/securelevel/secmodel_securelevel.c diff -u src/sys/secmodel/securelevel/secmodel_securelevel.c:1.30 src/sys/secmodel/securelevel/secmodel_securelevel.c:1.31 --- src/sys/secmodel/securelevel/secmodel_securelevel.c:1.30 Tue Feb 25 18:30:13 2014 +++ src/sys/secmodel/securelevel/secmodel_securelevel.c Thu Apr 26 18:54:09 2018 @@ -1,4 +1,4 @@ -/* $NetBSD: secmodel_securelevel.c,v 1.30 2014/02/25 18:30:13 pooka Exp $ */ +/* $NetBSD: secmodel_securelevel.c,v 1.31 2018/04/26 18:54:09 alnsn Exp $ */ /*- * Copyright (c) 2006 Elad Efrat <e...@netbsd.org> * All rights reserved. @@ -35,7 +35,7 @@ */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: secmodel_securelevel.c,v 1.30 2014/02/25 18:30:13 pooka Exp $"); +__KERNEL_RCSID(0, "$NetBSD: secmodel_securelevel.c,v 1.31 2018/04/26 18:54:09 alnsn Exp $"); #ifdef _KERNEL_OPT #include "opt_insecure.h" @@ -494,6 +494,11 @@ secmodel_securelevel_machdep_cb(kauth_cr result = KAUTH_RESULT_DENY; break; + case KAUTH_MACHDEP_SVS_DISABLE: + if (securelevel > 0) + result = KAUTH_RESULT_DENY; + break; + case KAUTH_MACHDEP_CPU_UCODE_APPLY: if (securelevel > 1) result = KAUTH_RESULT_DENY; Index: src/sys/secmodel/suser/secmodel_suser.c diff -u src/sys/secmodel/suser/secmodel_suser.c:1.43 src/sys/secmodel/suser/secmodel_suser.c:1.44 --- src/sys/secmodel/suser/secmodel_suser.c:1.43 Wed Jun 14 17:48:41 2017 +++ src/sys/secmodel/suser/secmodel_suser.c Thu Apr 26 18:54:09 2018 @@ -1,4 +1,4 @@ -/* $NetBSD: secmodel_suser.c,v 1.43 2017/06/14 17:48:41 maxv Exp $ */ +/* $NetBSD: secmodel_suser.c,v 1.44 2018/04/26 18:54:09 alnsn Exp $ */ /*- * Copyright (c) 2006 Elad Efrat <e...@netbsd.org> * All rights reserved. @@ -38,7 +38,7 @@ */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: secmodel_suser.c,v 1.43 2017/06/14 17:48:41 maxv Exp $"); +__KERNEL_RCSID(0, "$NetBSD: secmodel_suser.c,v 1.44 2018/04/26 18:54:09 alnsn Exp $"); #include <sys/types.h> #include <sys/param.h> @@ -854,6 +854,7 @@ secmodel_suser_machdep_cb(kauth_cred_t c case KAUTH_MACHDEP_UNMANAGEDMEM: case KAUTH_MACHDEP_PXG: case KAUTH_MACHDEP_X86PMC: + case KAUTH_MACHDEP_SVS_DISABLE: if (isroot) result = KAUTH_RESULT_ALLOW; break; Index: src/sys/sys/kauth.h diff -u src/sys/sys/kauth.h:1.75 src/sys/sys/kauth.h:1.76 --- src/sys/sys/kauth.h:1.75 Mon Aug 28 00:46:07 2017 +++ src/sys/sys/kauth.h Thu Apr 26 18:54:09 2018 @@ -1,4 +1,4 @@ -/* $NetBSD: kauth.h,v 1.75 2017/08/28 00:46:07 kamil Exp $ */ +/* $NetBSD: kauth.h,v 1.76 2018/04/26 18:54:09 alnsn Exp $ */ /*- * Copyright (c) 2005, 2006 Elad Efrat <e...@netbsd.org> @@ -320,7 +320,8 @@ enum { KAUTH_MACHDEP_NVRAM, KAUTH_MACHDEP_UNMANAGEDMEM, KAUTH_MACHDEP_PXG, - KAUTH_MACHDEP_X86PMC + KAUTH_MACHDEP_X86PMC, + KAUTH_MACHDEP_SVS_DISABLE }; /*