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Subject[PATCH v7 2/2] arm64: audit: Add audit hook in syscall_trace_enter/exit()
Date
This patch adds auditing functions on entry to or exit from
every system call invocation.

Acked-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
---
arch/arm64/kernel/ptrace.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index 9c52b3e..d10c637 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>

@@ -1091,6 +1093,9 @@ asmlinkage int syscall_trace_enter(struct pt_regs *regs)
if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
trace_sys_enter(regs, regs->syscallno);

+ audit_syscall_entry(syscall_get_arch(current, regs), regs->syscallno,
+ regs->orig_x0, regs->regs[1], regs->regs[2], regs->regs[3]);
+
return regs->syscallno;
}

@@ -1098,6 +1103,8 @@ asmlinkage void syscall_trace_exit(struct pt_regs *regs)
{
unsigned long saved_reg;

+ audit_syscall_exit(regs);
+
if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
trace_sys_exit(regs, regs_return_value(regs));

--
1.7.9.5


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