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author蔡正龙 <zhenglong.cai@cs2c.com.cn>2013-12-20 10:04:10 +0800
committerEric Paris <eparis@redhat.com>2014-03-20 10:11:09 -0400
commit015d991f7d97783f7220445960c0369b3e54ed08 (patch)
tree5efbf573e89b16595664bb0606fc7ab4324aedb9 /arch/alpha
parent099dd235113700bbb476e572cd191ddb77b9af46 (diff)
downloadlinux-stericsson-015d991f7d97783f7220445960c0369b3e54ed08.tar.gz
alpha: Enable system-call auditing support.
Signed-off-by: Zhenglong.cai <zhenglong.cai@cs2c.com.cn> Signed-off-by: Matt Turner <mattst88@gmail.com>
Diffstat (limited to 'arch/alpha')
-rw-r--r--arch/alpha/Kconfig3
-rw-r--r--arch/alpha/include/asm/ptrace.h5
-rw-r--r--arch/alpha/include/asm/thread_info.h2
-rw-r--r--arch/alpha/kernel/Makefile1
-rw-r--r--arch/alpha/kernel/audit.c60
-rw-r--r--arch/alpha/kernel/entry.S6
-rw-r--r--arch/alpha/kernel/ptrace.c4
7 files changed, 80 insertions, 1 deletions
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index d39dc9b95a2c..f23ab8ba4912 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -16,6 +16,7 @@ config ALPHA
select ARCH_WANT_IPC_PARSE_VERSION
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
+ select AUDIT_ARCH
select GENERIC_CLOCKEVENTS
select GENERIC_SMP_IDLE_THREAD
select GENERIC_STRNCPY_FROM_USER
@@ -76,6 +77,8 @@ config GENERIC_ISA_DMA
source "init/Kconfig"
source "kernel/Kconfig.freezer"
+config AUDIT_ARCH
+ bool
menu "System setup"
diff --git a/arch/alpha/include/asm/ptrace.h b/arch/alpha/include/asm/ptrace.h
index 21128505ddbe..9047c2fe8f23 100644
--- a/arch/alpha/include/asm/ptrace.h
+++ b/arch/alpha/include/asm/ptrace.h
@@ -19,4 +19,9 @@
#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
diff --git a/arch/alpha/include/asm/thread_info.h b/arch/alpha/include/asm/thread_info.h
index 453597b91f3a..3d6ce6d56fc9 100644
--- a/arch/alpha/include/asm/thread_info.h
+++ b/arch/alpha/include/asm/thread_info.h
@@ -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_SIGPENDING 2 /* signal pending */
#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_MEMDIE 13 /* is terminating due to OOM killer */
@@ -77,6 +78,7 @@ register struct thread_info *__current_thread_info __asm__("$8");
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
+#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
/* Work to do on interrupt/exception return. */
#define _TIF_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
diff --git a/arch/alpha/kernel/Makefile b/arch/alpha/kernel/Makefile
index 0d54650e78fc..3ecac0106c8a 100644
--- a/arch/alpha/kernel/Makefile
+++ b/arch/alpha/kernel/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_SRM_ENV) += srm_env.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_PERF_EVENTS) += perf_event.o
obj-$(CONFIG_RTC_DRV_ALPHA) += rtc.o
+obj-$(CONFIG_AUDIT) += audit.o
ifdef CONFIG_ALPHA_GENERIC
diff --git a/arch/alpha/kernel/audit.c b/arch/alpha/kernel/audit.c
new file mode 100644
index 000000000000..96a9d18ff4c4
--- /dev/null
+++ b/arch/alpha/kernel/audit.c
@@ -0,0 +1,60 @@
+#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);
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S
index a969b95ee5ac..98703d99b565 100644
--- a/arch/alpha/kernel/entry.S
+++ b/arch/alpha/kernel/entry.S
@@ -465,7 +465,11 @@ entSys:
.cfi_rel_offset $16, SP_OFF+24
.cfi_rel_offset $17, SP_OFF+32
.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
ldq $27, 0($5)
1: jsr $26, ($27), alpha_ni_syscall
diff --git a/arch/alpha/kernel/ptrace.c b/arch/alpha/kernel/ptrace.c
index 2a4a80ff4a20..86d835157b54 100644
--- a/arch/alpha/kernel/ptrace.c
+++ b/arch/alpha/kernel/ptrace.c
@@ -14,6 +14,7 @@
#include <linux/security.h>
#include <linux/signal.h>
#include <linux/tracehook.h>
+#include <linux/audit.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@@ -316,15 +317,18 @@ long arch_ptrace(struct task_struct *child, long request,
asmlinkage unsigned long syscall_trace_enter(void)
{
unsigned long ret = 0;
+ struct pt_regs *regs = current_pt_regs();
if (test_thread_flag(TIF_SYSCALL_TRACE) &&
tracehook_report_syscall_entry(current_pt_regs()))
ret = -1UL;
+ audit_syscall_entry(AUDIT_ARCH_ALPHA, regs->r0, regs->r16, regs->r17, regs->r18, regs->r19);
return ret ?: current_pt_regs()->r0;
}
asmlinkage void
syscall_trace_leave(void)
{
+ audit_syscall_exit(current_pt_regs());
if (test_thread_flag(TIF_SYSCALL_TRACE))
tracehook_report_syscall_exit(current_pt_regs(), 0);
}