[PATCH] audit syscall classes

Allow to tie upper bits of syscall bitmap in audit rules to kernel-defined
sets of syscalls.  Infrastructure, a couple of classes (with 32bit counterparts
for biarch targets) and actual tie-in on i386, amd64 and ia64.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

4 files changed, 44 insertions, 0 deletions

diff --git a/arch/x86_64/ia32/Makefile b/arch/x86_64/ia32/Makefile
index e9263b4975e0..62bc5f56da9e 100644
--- a/arch/x86_64/ia32/Makefile
+++ b/arch/x86_64/ia32/Makefile
@@ -11,6 +11,9 @@ obj-$(CONFIG_IA32_EMULATION) += $(sysv-y)
 
 obj-$(CONFIG_IA32_AOUT) += ia32_aout.o
 
+audit-class-$(CONFIG_AUDIT) := audit.o
+obj-$(CONFIG_IA32_EMULATION) += $(audit-class-y)
+
 $(obj)/syscall32_syscall.o: \
 	$(foreach F,sysenter syscall,$(obj)/vsyscall-$F.so)
 
diff --git a/arch/x86_64/ia32/audit.c b/arch/x86_64/ia32/audit.c
new file mode 100644
index 000000000000..ab94f2e58cdd
--- /dev/null
+++ b/arch/x86_64/ia32/audit.c
@@ -0,0 +1,11 @@
+#include <asm-i386/unistd.h>
+
+unsigned ia32_dir_class[] = {
+#include <asm-generic/audit_dir_write.h>
+~0U
+};
+
+unsigned ia32_chattr_class[] = {
+#include <asm-generic/audit_change_attr.h>
+~0U
+};
diff --git a/arch/x86_64/kernel/Makefile b/arch/x86_64/kernel/Makefile
index aeb9c560be88..819e84ec5b64 100644
--- a/arch/x86_64/kernel/Makefile
+++ b/arch/x86_64/kernel/Makefile
@@ -35,6 +35,7 @@ obj-$(CONFIG_KPROBES)		+= kprobes.o
 obj-$(CONFIG_X86_PM_TIMER)	+= pmtimer.o
 obj-$(CONFIG_X86_VSMP)		+= vsmp.o
 obj-$(CONFIG_K8_NB)		+= k8.o
+obj-$(CONFIG_AUDIT)		+= audit.o
 
 obj-$(CONFIG_MODULES)		+= module.o
 
diff --git a/arch/x86_64/kernel/audit.c b/arch/x86_64/kernel/audit.c
new file mode 100644
index 000000000000..a067aa468a85
--- /dev/null
+++ b/arch/x86_64/kernel/audit.c
@@ -0,0 +1,29 @@
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/audit.h>
+#include <asm/unistd.h>
+
+static unsigned dir_class[] = {
+#include <asm-generic/audit_dir_write.h>
+~0U
+};
+
+static unsigned chattr_class[] = {
+#include <asm-generic/audit_change_attr.h>
+~0U
+};
+
+static int __init audit_classes_init(void)
+{
+#ifdef CONFIG_IA32_EMULATION
+	extern __u32 ia32_dir_class[];
+	extern __u32 ia32_chattr_class[];
+	audit_register_class(AUDIT_CLASS_DIR_WRITE_32, ia32_dir_class);
+	audit_register_class(AUDIT_CLASS_CHATTR_32, ia32_chattr_class);
+#endif
+	audit_register_class(AUDIT_CLASS_DIR_WRITE, dir_class);
+	audit_register_class(AUDIT_CLASS_CHATTR, chattr_class);
+	return 0;
+}
+
+__initcall(audit_classes_init);