Re: [PATCH][LSM] Early init for security modules and various cleanups

Chris Wright (chris@wirex.com)
Mon, 2 Jun 2003 03:03:19 -0700

# This is a BitKeeper generated patch for the following project:
# Project Name: Linux kernel tree
# This patch format is intended for GNU patch command version 2.5 or higher.
# This patch includes the following deltas:
# ChangeSet 1.1263 -> 1.1264
# arch/m68k/vmlinux-sun3.lds 1.14 -> 1.15
# security/security.c 1.7 -> 1.8
# include/linux/init.h 1.25 -> 1.26
# include/asm-generic/vmlinux.lds.h 1.7 -> 1.8
# arch/x86_64/vmlinux.lds.S 1.16 -> 1.17
# arch/sparc/vmlinux.lds.S 1.16 -> 1.17
# arch/h8300/platform/h8300h/generic/rom.ld 1.1 -> 1.2
# init/main.c 1.99 -> 1.100
# arch/i386/vmlinux.lds.S 1.30 -> 1.31
# arch/parisc/vmlinux.lds.S 1.13 -> 1.14
# arch/mips/vmlinux.lds.S 1.8 -> 1.9
# arch/arm/vmlinux-armv.lds.in 1.24 -> 1.25
# security/capability.c 1.16 -> 1.17
# arch/s390/vmlinux.lds.S 1.13 -> 1.14
# arch/m68knommu/vmlinux.lds.S 1.9 -> 1.10
# arch/cris/vmlinux.lds.S 1.16 -> 1.17
# arch/mips64/vmlinux.lds.S 1.7 -> 1.8
# arch/alpha/vmlinux.lds.S 1.21 -> 1.22
# arch/sh/vmlinux.lds.S 1.10 -> 1.11
# arch/ppc64/vmlinux.lds.S 1.14 -> 1.15
# arch/ia64/vmlinux.lds.S 1.29 -> 1.30
# arch/sparc64/vmlinux.lds.S 1.18 -> 1.19
# arch/m68k/vmlinux-std.lds 1.16 -> 1.17
# arch/arm/vmlinux-armo.lds.in 1.15 -> 1.16
# security/root_plug.c 1.3 -> 1.4
# arch/ppc/vmlinux.lds.S 1.19 -> 1.20
#
# The following is the BitKeeper ChangeSet Log
# --------------------------------------------
# 03/06/02 chris@wirex.com 1.1264
# [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.
# --------------------------------------------
#
diff -Nru a/arch/alpha/vmlinux.lds.S b/arch/alpha/vmlinux.lds.S
--- a/arch/alpha/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/alpha/vmlinux.lds.S Mon Jun 2 01:31:49 2003
@@ -74,6 +74,9 @@
__con_initcall_end = .;
}

+ . = ALIGN(8);
+ SECURITY_INIT
+
. = ALIGN(64);
__per_cpu_start = .;
.data.percpu : { *(.data.percpu) }
diff -Nru a/arch/arm/vmlinux-armo.lds.in b/arch/arm/vmlinux-armo.lds.in
--- a/arch/arm/vmlinux-armo.lds.in Mon Jun 2 01:31:49 2003
+++ b/arch/arm/vmlinux-armo.lds.in Mon Jun 2 01:31:49 2003
@@ -43,6 +43,7 @@
__con_initcall_start = .;
*(.con_initcall.init)
__con_initcall_end = .;
+ SECURITY_INIT
. = ALIGN(32768);
__init_end = .;
}
diff -Nru a/arch/arm/vmlinux-armv.lds.in b/arch/arm/vmlinux-armv.lds.in
--- a/arch/arm/vmlinux-armv.lds.in Mon Jun 2 01:31:49 2003
+++ b/arch/arm/vmlinux-armv.lds.in Mon Jun 2 01:31:49 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)
diff -Nru a/arch/cris/vmlinux.lds.S b/arch/cris/vmlinux.lds.S
--- a/arch/cris/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/cris/vmlinux.lds.S Mon Jun 2 01:31:49 2003
@@ -74,7 +74,9 @@
__con_initcall_start = .;
*(.con_initcall.init)
__con_initcall_end = .;
-
+ }
+ SECURITY_INIT
+
/* 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. */
diff -Nru a/arch/h8300/platform/h8300h/generic/rom.ld b/arch/h8300/platform/h8300h/generic/rom.ld
--- a/arch/h8300/platform/h8300h/generic/rom.ld Mon Jun 2 01:31:49 2003
+++ b/arch/h8300/platform/h8300h/generic/rom.ld Mon Jun 2 01:31:49 2003
@@ -83,6 +83,7 @@
___con_initcall_start = .;
*(.con_initcall.init)
___con_initcall_end = .;
+ SECURITY_INIT
. = ALIGN(4);
___initramfs_start = .;
*(.init.ramfs)
diff -Nru a/arch/i386/vmlinux.lds.S b/arch/i386/vmlinux.lds.S
--- a/arch/i386/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/i386/vmlinux.lds.S Mon Jun 2 01:31:49 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) }
diff -Nru a/arch/ia64/vmlinux.lds.S b/arch/ia64/vmlinux.lds.S
--- a/arch/ia64/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/ia64/vmlinux.lds.S Mon Jun 2 01:31:49 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 = .;

diff -Nru a/arch/m68k/vmlinux-std.lds b/arch/m68k/vmlinux-std.lds
--- a/arch/m68k/vmlinux-std.lds Mon Jun 2 01:31:49 2003
+++ b/arch/m68k/vmlinux-std.lds Mon Jun 2 01:31:49 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) }
diff -Nru a/arch/m68k/vmlinux-sun3.lds b/arch/m68k/vmlinux-sun3.lds
--- a/arch/m68k/vmlinux-sun3.lds Mon Jun 2 01:31:49 2003
+++ b/arch/m68k/vmlinux-sun3.lds Mon Jun 2 01:31:49 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) }
diff -Nru a/arch/m68knommu/vmlinux.lds.S b/arch/m68knommu/vmlinux.lds.S
--- a/arch/m68knommu/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/m68knommu/vmlinux.lds.S Mon Jun 2 01:31:49 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)
diff -Nru a/arch/mips/vmlinux.lds.S b/arch/mips/vmlinux.lds.S
--- a/arch/mips/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/mips/vmlinux.lds.S Mon Jun 2 01:31:49 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 = .;

diff -Nru a/arch/mips64/vmlinux.lds.S b/arch/mips64/vmlinux.lds.S
--- a/arch/mips64/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/mips64/vmlinux.lds.S Mon Jun 2 01:31:49 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 = .;

diff -Nru a/arch/parisc/vmlinux.lds.S b/arch/parisc/vmlinux.lds.S
--- a/arch/parisc/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/parisc/vmlinux.lds.S Mon Jun 2 01:31:49 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) }
diff -Nru a/arch/ppc/vmlinux.lds.S b/arch/ppc/vmlinux.lds.S
--- a/arch/ppc/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/ppc/vmlinux.lds.S Mon Jun 2 01:31:49 2003
@@ -115,6 +115,8 @@
.con_initcall.init : { *(.con_initcall.init) }
__con_initcall_end = .;

+ SECURITY_INIT
+
__start___ftr_fixup = .;
__ftr_fixup : { *(__ftr_fixup) }
__stop___ftr_fixup = .;
diff -Nru a/arch/ppc64/vmlinux.lds.S b/arch/ppc64/vmlinux.lds.S
--- a/arch/ppc64/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/ppc64/vmlinux.lds.S Mon Jun 2 01:31:49 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) }
diff -Nru a/arch/s390/vmlinux.lds.S b/arch/s390/vmlinux.lds.S
--- a/arch/s390/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/s390/vmlinux.lds.S Mon Jun 2 01:31:49 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) }
diff -Nru a/arch/sh/vmlinux.lds.S b/arch/sh/vmlinux.lds.S
--- a/arch/sh/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/sh/vmlinux.lds.S Mon Jun 2 01:31:49 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 = .;
diff -Nru a/arch/sparc/vmlinux.lds.S b/arch/sparc/vmlinux.lds.S
--- a/arch/sparc/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/sparc/vmlinux.lds.S Mon Jun 2 01:31:49 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) }
diff -Nru a/arch/sparc64/vmlinux.lds.S b/arch/sparc64/vmlinux.lds.S
--- a/arch/sparc64/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/sparc64/vmlinux.lds.S Mon Jun 2 01:31:49 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) }
diff -Nru a/arch/x86_64/vmlinux.lds.S b/arch/x86_64/vmlinux.lds.S
--- a/arch/x86_64/vmlinux.lds.S Mon Jun 2 01:31:49 2003
+++ b/arch/x86_64/vmlinux.lds.S Mon Jun 2 01:31:49 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) }
diff -Nru a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
--- a/include/asm-generic/vmlinux.lds.h Mon Jun 2 01:31:49 2003
+++ b/include/asm-generic/vmlinux.lds.h Mon Jun 2 01:31:49 2003
@@ -45,3 +45,9 @@
*(__ksymtab_strings) \
}

+#define SECURITY_INIT \
+ .security_initcall.init : { \
+ __security_initcall_start = .; \
+ *(.security_initcall.init) \
+ __security_initcall_end = .; \
+ }
diff -Nru a/include/linux/init.h b/include/linux/init.h
--- a/include/linux/init.h Mon Jun 2 01:31:49 2003
+++ b/include/linux/init.h Mon Jun 2 01:31:49 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
diff -Nru a/init/main.c b/init/main.c
--- a/init/main.c Mon Jun 2 01:31:49 2003
+++ b/init/main.c Mon Jun 2 01:31:49 2003
@@ -435,8 +435,8 @@
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();
diff -Nru a/security/capability.c b/security/capability.c
--- a/security/capability.c Mon Jun 2 01:31:49 2003
+++ b/security/capability.c Mon Jun 2 01:31:49 2003
@@ -340,7 +340,7 @@
}
}

-module_init (capability_init);
+security_initcall (capability_init);
module_exit (capability_exit);

MODULE_DESCRIPTION("Standard Linux Capabilities Security Module");
diff -Nru a/security/root_plug.c b/security/root_plug.c
--- a/security/root_plug.c Mon Jun 2 01:31:49 2003
+++ b/security/root_plug.c Mon Jun 2 01:31:49 2003
@@ -183,7 +183,7 @@
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");
diff -Nru a/security/security.c b/security/security.c
--- a/security/security.c Mon Jun 2 01:31:49 2003
+++ b/security/security.c Mon Jun 2 01:31:49 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;
}
-
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