[PATCH v5 3/3] arm64: audit: Add audit hook in ptrace/syscall_trace
This patch adds auditing functions on entry to or exit from
every system call invocation.
Signed-off-by: AKASHI Takahiro <takahiro.akashi(a)linaro.org>
Acked-by: Richard Guy Briggs <rgb(a)redhat.com>
---
arch/arm64/kernel/ptrace.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index c70133e..d4ce70e 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -19,6 +19,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>;.
*/
+#include <linux/audit.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
@@ -38,6 +39,7 @@
#include <asm/compat.h>
#include <asm/debug-monitors.h>
#include <asm/pgtable.h>
+#include <asm/syscall.h>
#include <asm/traps.h>
#include <asm/system_misc.h>
@@ -1062,6 +1064,9 @@ asmlinkage int syscall_trace(int dir, struct pt_regs *regs)
{
unsigned long saved_reg;
+ if (dir && test_thread_flag(TIF_SYSCALL_AUDIT))
+ audit_syscall_exit(regs);
+
if (test_thread_flag(TIF_SYSCALL_TRACE)) {
if (is_compat_task()) {
/* AArch32 uses ip (r12) for scratch */
@@ -1087,5 +1092,11 @@ asmlinkage int syscall_trace(int dir, struct pt_regs *regs)
regs->regs[7] = saved_reg;
}
+ if (!dir && test_thread_flag(TIF_SYSCALL_AUDIT))
+ audit_syscall_entry(syscall_get_arch(current, regs),
+ (int)regs->syscallno,
+ regs->orig_x0, regs->regs[1],
+ regs->regs[2], regs->regs[3]);
+
return regs->syscallno;
}
--
1.7.9.5