Commit a9302e84 authored by 蔡正龙's avatar 蔡正龙 Committed by Matt Turner

alpha: Enable system-call auditing support.

Signed-off-by: default avatarZhenglong.cai <zhenglong.cai@cs2c.com.cn>
Signed-off-by: default avatarMatt Turner <mattst88@gmail.com>
parent e7651b81
...@@ -17,6 +17,7 @@ config ALPHA ...@@ -17,6 +17,7 @@ config ALPHA
select ARCH_WANT_IPC_PARSE_VERSION select ARCH_WANT_IPC_PARSE_VERSION
select ARCH_HAVE_NMI_SAFE_CMPXCHG select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
select AUDIT_ARCH
select GENERIC_CLOCKEVENTS select GENERIC_CLOCKEVENTS
select GENERIC_SMP_IDLE_THREAD select GENERIC_SMP_IDLE_THREAD
select GENERIC_STRNCPY_FROM_USER select GENERIC_STRNCPY_FROM_USER
...@@ -77,6 +78,8 @@ config GENERIC_ISA_DMA ...@@ -77,6 +78,8 @@ config GENERIC_ISA_DMA
source "init/Kconfig" source "init/Kconfig"
source "kernel/Kconfig.freezer" source "kernel/Kconfig.freezer"
config AUDIT_ARCH
bool
menu "System setup" menu "System setup"
......
...@@ -19,4 +19,9 @@ ...@@ -19,4 +19,9 @@
#define force_successful_syscall_return() (current_pt_regs()->r0 = 0) #define force_successful_syscall_return() (current_pt_regs()->r0 = 0)
static inline unsigned long regs_return_value(struct pt_regs *regs)
{
return regs->r0;
}
#endif #endif
...@@ -70,6 +70,7 @@ register struct thread_info *__current_thread_info __asm__("$8"); ...@@ -70,6 +70,7 @@ register struct thread_info *__current_thread_info __asm__("$8");
#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */ #define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
#define TIF_SIGPENDING 2 /* signal pending */ #define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */ #define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_SYSCALL_AUDIT 4 /* syscall audit active */
#define TIF_DIE_IF_KERNEL 9 /* dik recursion lock */ #define TIF_DIE_IF_KERNEL 9 /* dik recursion lock */
#define TIF_MEMDIE 13 /* is terminating due to OOM killer */ #define TIF_MEMDIE 13 /* is terminating due to OOM killer */
...@@ -77,6 +78,7 @@ register struct thread_info *__current_thread_info __asm__("$8"); ...@@ -77,6 +78,7 @@ register struct thread_info *__current_thread_info __asm__("$8");
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING) #define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) #define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
/* Work to do on interrupt/exception return. */ /* Work to do on interrupt/exception return. */
#define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \ #define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
......
...@@ -17,6 +17,7 @@ obj-$(CONFIG_SRM_ENV) += srm_env.o ...@@ -17,6 +17,7 @@ obj-$(CONFIG_SRM_ENV) += srm_env.o
obj-$(CONFIG_MODULES) += module.o obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_PERF_EVENTS) += perf_event.o obj-$(CONFIG_PERF_EVENTS) += perf_event.o
obj-$(CONFIG_RTC_DRV_ALPHA) += rtc.o obj-$(CONFIG_RTC_DRV_ALPHA) += rtc.o
obj-$(CONFIG_AUDIT) += audit.o
ifdef CONFIG_ALPHA_GENERIC ifdef CONFIG_ALPHA_GENERIC
......
#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 read_class[] = {
#include <asm-generic/audit_read.h>
~0U
};
static unsigned write_class[] = {
#include <asm-generic/audit_write.h>
~0U
};
static unsigned chattr_class[] = {
#include <asm-generic/audit_change_attr.h>
~0U
};
static unsigned signal_class[] = {
#include <asm-generic/audit_signal.h>
~0U
};
int audit_classify_arch(int arch)
{
return 0;
}
int audit_classify_syscall(int abi, unsigned syscall)
{
switch(syscall) {
case __NR_open:
return 2;
case __NR_openat:
return 3;
case __NR_execve:
return 5;
default:
return 0;
}
}
static int __init audit_classes_init(void)
{
audit_register_class(AUDIT_CLASS_WRITE, write_class);
audit_register_class(AUDIT_CLASS_READ, read_class);
audit_register_class(AUDIT_CLASS_DIR_WRITE, dir_class);
audit_register_class(AUDIT_CLASS_CHATTR, chattr_class);
audit_register_class(AUDIT_CLASS_SIGNAL, signal_class);
return 0;
}
__initcall(audit_classes_init);
...@@ -465,7 +465,11 @@ entSys: ...@@ -465,7 +465,11 @@ entSys:
.cfi_rel_offset $16, SP_OFF+24 .cfi_rel_offset $16, SP_OFF+24
.cfi_rel_offset $17, SP_OFF+32 .cfi_rel_offset $17, SP_OFF+32
.cfi_rel_offset $18, SP_OFF+40 .cfi_rel_offset $18, SP_OFF+40
blbs $3, strace #ifdef CONFIG_AUDITSYSCALL
lda $6, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
and $3, $6, $3
#endif
bne $3, strace
beq $4, 1f beq $4, 1f
ldq $27, 0($5) ldq $27, 0($5)
1: jsr $26, ($27), alpha_ni_syscall 1: jsr $26, ($27), alpha_ni_syscall
......
...@@ -14,6 +14,7 @@ ...@@ -14,6 +14,7 @@
#include <linux/security.h> #include <linux/security.h>
#include <linux/signal.h> #include <linux/signal.h>
#include <linux/tracehook.h> #include <linux/tracehook.h>
#include <linux/audit.h>
#include <asm/uaccess.h> #include <asm/uaccess.h>
#include <asm/pgtable.h> #include <asm/pgtable.h>
...@@ -316,15 +317,18 @@ long arch_ptrace(struct task_struct *child, long request, ...@@ -316,15 +317,18 @@ long arch_ptrace(struct task_struct *child, long request,
asmlinkage unsigned long syscall_trace_enter(void) asmlinkage unsigned long syscall_trace_enter(void)
{ {
unsigned long ret = 0; unsigned long ret = 0;
struct pt_regs *regs = current_pt_regs();
if (test_thread_flag(TIF_SYSCALL_TRACE) && if (test_thread_flag(TIF_SYSCALL_TRACE) &&
tracehook_report_syscall_entry(current_pt_regs())) tracehook_report_syscall_entry(current_pt_regs()))
ret = -1UL; ret = -1UL;
audit_syscall_entry(AUDIT_ARCH_ALPHA, regs->r0, regs->r16, regs->r17, regs->r18, regs->r19);
return ret ?: current_pt_regs()->r0; return ret ?: current_pt_regs()->r0;
} }
asmlinkage void asmlinkage void
syscall_trace_leave(void) syscall_trace_leave(void)
{ {
audit_syscall_exit(current_pt_regs());
if (test_thread_flag(TIF_SYSCALL_TRACE)) if (test_thread_flag(TIF_SYSCALL_TRACE))
tracehook_report_syscall_exit(current_pt_regs(), 0); tracehook_report_syscall_exit(current_pt_regs(), 0);
} }
...@@ -284,7 +284,7 @@ config AUDIT ...@@ -284,7 +284,7 @@ config AUDIT
config AUDITSYSCALL config AUDITSYSCALL
bool "Enable system-call auditing support" bool "Enable system-call auditing support"
depends on AUDIT && (X86 || PARISC || PPC || S390 || IA64 || UML || SPARC64 || SUPERH || (ARM && AEABI && !OABI_COMPAT)) depends on AUDIT && (X86 || PARISC || PPC || S390 || IA64 || UML || SPARC64 || SUPERH || (ARM && AEABI && !OABI_COMPAT) || ALPHA)
default y if SECURITY_SELINUX default y if SECURITY_SELINUX
help help
Enable low-overhead system-call auditing infrastructure that Enable low-overhead system-call auditing infrastructure that
......
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