Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265181AbTFMG5W (ORCPT ); Fri, 13 Jun 2003 02:57:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265182AbTFMG5V (ORCPT ); Fri, 13 Jun 2003 02:57:21 -0400 Received: from cerebus.wirex.com ([65.102.14.138]:64499 "EHLO figure1.int.wirex.com") by vger.kernel.org with ESMTP id S265181AbTFMG5A (ORCPT ); Fri, 13 Jun 2003 02:57:00 -0400 Date: Fri, 13 Jun 2003 00:10:21 -0700 From: Chris Wright To: torvalds@transmeta.com, akpm@digeo.com Cc: linux-kernel@vger.kernel.org, linux-security-module@wirex.com, greg@kroah.com, sds@epoch.ncsc.mil Message-ID: <20030613001021.D31636@figure1.int.wirex.com> Mail-Followup-To: torvalds@transmeta.com, akpm@digeo.com, linux-kernel@vger.kernel.org, linux-security-module@wirex.com, greg@kroah.com, sds@epoch.ncsc.mil Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 11547 Lines: 339 Bcc: chris@wirex.com Subject: Re: [PATCH][LSM] Early init for security modules 1/4 Reply-To: In-Reply-To: <20030613000409.B31636@figure1.int.wirex.com>; from chris@wirex.com on Fri, Jun 13, 2003 at 12:04:09AM -0700 [LSM] early init for security modules. As discussed before, this allows for early initialization of security modules when compiled statically into the kernel. The standard do_initcalls is too late for complete coverage of all filesystems and threads, for example. --- linus-2.5/arch/alpha/vmlinux.lds.S.early_init Wed Apr 2 00:42:56 2003 +++ linus-2.5/arch/alpha/vmlinux.lds.S Thu Jun 12 00:40:04 2003 @@ -74,6 +74,9 @@ __con_initcall_end = .; } + . = ALIGN(8); + SECURITY_INIT + . = ALIGN(64); __per_cpu_start = .; .data.percpu : { *(.data.percpu) } --- linus-2.5/arch/arm/vmlinux-armo.lds.in.early_init Wed Apr 2 00:42:56 2003 +++ linus-2.5/arch/arm/vmlinux-armo.lds.in Thu Jun 12 00:40:04 2003 @@ -43,6 +43,7 @@ __con_initcall_start = .; *(.con_initcall.init) __con_initcall_end = .; + SECURITY_INIT . = ALIGN(32768); __init_end = .; } --- linus-2.5/arch/arm/vmlinux-armv.lds.in.early_init Sun Apr 27 08:35:24 2003 +++ linus-2.5/arch/arm/vmlinux-armv.lds.in Thu Jun 12 00:40:04 2003 @@ -53,6 +53,7 @@ __con_initcall_start = .; *(.con_initcall.init) __con_initcall_end = .; + SECURITY_INIT . = ALIGN(32); __initramfs_start = .; usr/built-in.o(.init.ramfs) --- linus-2.5/arch/cris/vmlinux.lds.S.early_init Fri Feb 14 14:37:05 2003 +++ linus-2.5/arch/cris/vmlinux.lds.S Thu Jun 12 22:41:51 2003 @@ -74,7 +74,12 @@ __con_initcall_start = .; *(.con_initcall.init) __con_initcall_end = .; - + } + .security_initcall.init : { + __security_initcall_start = .; + *(.security_initcall.init) + __security_initcall_end = .; + /* We fill to the next page, so we can discard all init pages without needing to consider what payload might be appended to the kernel image. */ --- linus-2.5/arch/h8300/platform/h8300h/generic/rom.ld.early_init Thu Apr 17 12:30:45 2003 +++ linus-2.5/arch/h8300/platform/h8300h/generic/rom.ld Thu Jun 12 00:40:05 2003 @@ -83,6 +83,7 @@ ___con_initcall_start = .; *(.con_initcall.init) ___con_initcall_end = .; + SECURITY_INIT . = ALIGN(4); ___initramfs_start = .; *(.init.ramfs) --- linus-2.5/arch/i386/vmlinux.lds.S.early_init Tue May 6 06:54:06 2003 +++ linus-2.5/arch/i386/vmlinux.lds.S Thu Jun 12 00:40:05 2003 @@ -81,6 +81,7 @@ __con_initcall_start = .; .con_initcall.init : { *(.con_initcall.init) } __con_initcall_end = .; + SECURITY_INIT . = ALIGN(4); __alt_instructions = .; .altinstructions : { *(.altinstructions) } --- linus-2.5/arch/ia64/vmlinux.lds.S.early_init Wed Apr 2 00:42:56 2003 +++ linus-2.5/arch/ia64/vmlinux.lds.S Thu Jun 12 00:40:05 2003 @@ -141,6 +141,10 @@ .con_initcall.init : AT(ADDR(.con_initcall.init) - PAGE_OFFSET) { *(.con_initcall.init) } __con_initcall_end = .; + __security_initcall_start = .; + .security_initcall.init : AT(ADDR(.security_initcall.init) - PAGE_OFFSET) + { *(.security_initcall.init) } + __security_initcall_end = .; . = ALIGN(PAGE_SIZE); __init_end = .; --- linus-2.5/arch/m68k/vmlinux-std.lds.early_init Wed Apr 2 00:42:56 2003 +++ linus-2.5/arch/m68k/vmlinux-std.lds Thu Jun 12 00:40:05 2003 @@ -67,6 +67,7 @@ __con_initcall_start = .; .con_initcall.init : { *(.con_initcall.init) } __con_initcall_end = .; + SECURITY_INIT . = ALIGN(8192); __initramfs_start = .; .init.ramfs : { *(.init.ramfs) } --- linus-2.5/arch/m68k/vmlinux-sun3.lds.early_init Wed Apr 2 00:42:56 2003 +++ linus-2.5/arch/m68k/vmlinux-sun3.lds Thu Jun 12 00:40:05 2003 @@ -61,6 +61,7 @@ __con_initcall_start = .; .con_initcall.init : { *(.con_initcall.init) } __con_initcall_end = .; + SECURITY_INIT . = ALIGN(8192); __initramfs_start = .; .init.ramfs : { *(.init.ramfs) } --- linus-2.5/arch/m68knommu/vmlinux.lds.S.early_init Tue May 27 20:13:11 2003 +++ linus-2.5/arch/m68knommu/vmlinux.lds.S Thu Jun 12 00:40:05 2003 @@ -277,9 +277,7 @@ __con_initcall_start = .; *(.con_initcall.init) __con_initcall_end = .; - __security_initcall_start = .; - *(.security_initcall.init) - __security_initcall_end = .; + SECURITY_INIT . = ALIGN(4); __initramfs_start = .; *(.init.ramfs) --- linus-2.5/arch/mips/vmlinux.lds.S.early_init Fri Feb 14 15:09:55 2003 +++ linus-2.5/arch/mips/vmlinux.lds.S Thu Jun 12 00:40:06 2003 @@ -54,6 +54,7 @@ __con_initcall_start = .; .con_initcall.init : { *(.con_initcall.init) } __con_initcall_end = .; + SECURITY_INIT . = ALIGN(4096); /* Align double page for init_task_union */ __init_end = .; --- linus-2.5/arch/mips64/vmlinux.lds.S.early_init Fri Feb 14 15:10:00 2003 +++ linus-2.5/arch/mips64/vmlinux.lds.S Thu Jun 12 00:40:06 2003 @@ -53,6 +53,7 @@ __con_initcall_start = .; .con_initcall.init : { *(.con_initcall.init) } __con_initcall_end = .; + SECURITY_INIT . = ALIGN(4096); /* Align double page for init_task_union */ __init_end = .; --- linus-2.5/arch/parisc/vmlinux.lds.S.early_init Wed Apr 2 00:42:56 2003 +++ linus-2.5/arch/parisc/vmlinux.lds.S Thu Jun 12 00:40:06 2003 @@ -80,6 +80,7 @@ __con_initcall_start = .; .con_initcall.init : { *(.con_initcall.init) } __con_initcall_end = .; + SECURITY_INIT . = ALIGN(4096); __initramfs_start = .; .init.ramfs : { *(.init.ramfs) } --- linus-2.5/arch/ppc/vmlinux.lds.S.early_init Mon May 26 04:58:49 2003 +++ linus-2.5/arch/ppc/vmlinux.lds.S Thu Jun 12 00:40:06 2003 @@ -119,6 +119,8 @@ .con_initcall.init : { *(.con_initcall.init) } __con_initcall_end = .; + SECURITY_INIT + __start___ftr_fixup = .; __ftr_fixup : { *(__ftr_fixup) } __stop___ftr_fixup = .; --- linus-2.5/arch/ppc64/vmlinux.lds.S.early_init Wed Apr 2 00:42:56 2003 +++ linus-2.5/arch/ppc64/vmlinux.lds.S Thu Jun 12 00:40:07 2003 @@ -104,6 +104,7 @@ __con_initcall_start = .; .con_initcall.init : { *(.con_initcall.init) } __con_initcall_end = .; + SECURITY_INIT . = ALIGN(4096); __initramfs_start = .; .init.ramfs : { *(.init.ramfs) } --- linus-2.5/arch/s390/vmlinux.lds.S.early_init Mon May 26 12:20:42 2003 +++ linus-2.5/arch/s390/vmlinux.lds.S Thu Jun 12 00:40:07 2003 @@ -94,6 +94,7 @@ __con_initcall_start = .; .con_initcall.init : { *(.con_initcall.init) } __con_initcall_end = .; + SECURITY_INIT . = ALIGN(256); __initramfs_start = .; .init.ramfs : { *(.init.initramfs) } --- linus-2.5/arch/sh/vmlinux.lds.S.early_init Fri Feb 14 15:11:24 2003 +++ linus-2.5/arch/sh/vmlinux.lds.S Thu Jun 12 00:40:08 2003 @@ -71,6 +71,7 @@ __con_initcall_start = .; .con_initcall.init : { *(.con_initcall.init) } __con_initcall_end = .; + SECURITY_INIT __machvec_start = .; .machvec.init : { *(.machvec.init) } __machvec_end = .; --- linus-2.5/arch/sparc/vmlinux.lds.S.early_init Wed Apr 2 00:42:56 2003 +++ linus-2.5/arch/sparc/vmlinux.lds.S Thu Jun 12 00:40:09 2003 @@ -62,6 +62,7 @@ __con_initcall_start = .; .con_initcall.init : { *(.con_initcall.init) } __con_initcall_end = .; + SECURITY_INIT . = ALIGN(4096); __initramfs_start = .; .init.ramfs : { *(.init.ramfs) } --- linus-2.5/arch/sparc64/vmlinux.lds.S.early_init Wed Apr 2 00:42:56 2003 +++ linus-2.5/arch/sparc64/vmlinux.lds.S Thu Jun 12 00:40:09 2003 @@ -68,6 +68,7 @@ __con_initcall_start = .; .con_initcall.init : { *(.con_initcall.init) } __con_initcall_end = .; + SECURITY_INIT . = ALIGN(8192); __initramfs_start = .; .init.ramfs : { *(.init.ramfs) } --- linus-2.5/arch/x86_64/vmlinux.lds.S.early_init Fri May 23 03:56:33 2003 +++ linus-2.5/arch/x86_64/vmlinux.lds.S Thu Jun 12 00:40:10 2003 @@ -105,6 +105,7 @@ __con_initcall_start = .; .con_initcall.init : { *(.con_initcall.init) } __con_initcall_end = .; + SECURITY_INIT . = ALIGN(4096); __initramfs_start = .; .init.ramfs : { *(.init.ramfs) } --- linus-2.5/include/asm-generic/vmlinux.lds.h.early_init Mon Feb 3 13:00:30 2003 +++ linus-2.5/include/asm-generic/vmlinux.lds.h Thu Jun 12 00:40:10 2003 @@ -45,3 +45,9 @@ *(__ksymtab_strings) \ } +#define SECURITY_INIT \ + .security_initcall.init : { \ + __security_initcall_start = .; \ + *(.security_initcall.init) \ + __security_initcall_end = .; \ + } --- linus-2.5/include/linux/init.h.early_init Mon Mar 3 13:05:26 2003 +++ linus-2.5/include/linux/init.h Thu Jun 12 00:40:10 2003 @@ -64,6 +64,7 @@ typedef void (*exitcall_t)(void); extern initcall_t __con_initcall_start, __con_initcall_end; +extern initcall_t __security_initcall_start, __security_initcall_end; #endif #ifndef MODULE @@ -96,6 +97,9 @@ #define console_initcall(fn) \ static initcall_t __initcall_##fn __attribute__ ((unused,__section__ (".con_initcall.init")))=fn +#define security_initcall(fn) \ + static initcall_t __initcall_##fn __attribute__ ((unused,__section__ (".security_initcall.init"))) = fn + struct obs_kernel_param { const char *str; int (*setup_func)(char *); @@ -142,6 +146,8 @@ #define fs_initcall(fn) module_init(fn) #define device_initcall(fn) module_init(fn) #define late_initcall(fn) module_init(fn) + +#define security_initcall(fn) module_init(fn) /* These macros create a dummy inline: gcc 2.9x does not count alias as usage, hence the `unused function' warning when __init functions --- linus-2.5/init/main.c.early_init Fri Jun 6 17:30:07 2003 +++ linus-2.5/init/main.c Thu Jun 12 00:40:11 2003 @@ -439,8 +439,8 @@ pte_chain_init(); fork_init(num_physpages); proc_caches_init(); - security_scaffolding_startup(); buffer_init(); + security_scaffolding_startup(); vfs_caches_init(num_physpages); radix_tree_init(); signals_init(); --- linus-2.5/security/capability.c.early_init Mon Feb 17 12:08:10 2003 +++ linus-2.5/security/capability.c Thu Jun 12 00:40:11 2003 @@ -348,7 +348,7 @@ } } -module_init (capability_init); +security_initcall (capability_init); module_exit (capability_exit); MODULE_DESCRIPTION("Standard Linux Capabilities Security Module"); --- linus-2.5/security/root_plug.c.early_init Mon Jun 2 03:37:38 2003 +++ linus-2.5/security/root_plug.c Thu Jun 12 00:40:12 2003 @@ -135,7 +135,7 @@ printk (KERN_INFO "Root Plug module removed\n"); } -module_init (rootplug_init); +security_initcall (rootplug_init); module_exit (rootplug_exit); MODULE_DESCRIPTION("Root Plug sample LSM module, written for Linux Journal article"); --- linus-2.5/security/security.c.early_init Wed Dec 18 15:10:17 2002 +++ linus-2.5/security/security.c Thu Jun 12 00:40:12 2003 @@ -38,12 +38,22 @@ return 0; } +static void __init do_security_initcalls(void) +{ + initcall_t *call; + call = &__security_initcall_start; + while (call < &__security_initcall_end) { + (*call)(); + call++; + } +} + /** * security_scaffolding_startup - initialzes the security scaffolding framework * * This should be called early in the kernel initialization sequence. */ -int security_scaffolding_startup (void) +int __init security_scaffolding_startup (void) { printk (KERN_INFO "Security Scaffold v" SECURITY_SCAFFOLD_VERSION " initialized\n"); @@ -55,6 +65,7 @@ } security_ops = &dummy_security_ops; + do_security_initcalls(); return 0; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/