--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -614,6 +614,7 @@ int __secure_computing(void)
 #ifdef CONFIG_SECCOMP_FILTER
 static u32 __seccomp_phase1_filter(int this_syscall, struct seccomp_data *sd)
 {
+	char name[sizeof(current->comm)];
 	u32 filter_ret, action;
 	int data;
 
@@ -644,6 +645,13 @@ static u32 __seccomp_phase1_filter(int t
 	case SECCOMP_RET_TRACE:
 		return filter_ret;  /* Save the rest for phase 2. */
 
+	case SECCOMP_RET_LOG:
+		get_task_comm(name, current);
+		pr_err_ratelimited("seccomp: %s [%u] tried to call non-whitelisted syscall: %d\n", name, current->pid, this_syscall);
+		syscall_set_return_value(current, task_pt_regs(current),
+					 -data, 0);
+		goto skip;
+
 	case SECCOMP_RET_ALLOW:
 		return SECCOMP_PHASE1_OK;
 
--- a/include/uapi/linux/seccomp.h
+++ b/include/uapi/linux/seccomp.h
@@ -28,6 +28,7 @@
 #define SECCOMP_RET_KILL	0x00000000U /* kill the task immediately */
 #define SECCOMP_RET_TRAP	0x00030000U /* disallow and force a SIGSYS */
 #define SECCOMP_RET_ERRNO	0x00050000U /* returns an errno */
+#define SECCOMP_RET_LOG		0x00070000U /* allow + logline */
 #define SECCOMP_RET_TRACE	0x7ff00000U /* pass to a tracer or disallow */
 #define SECCOMP_RET_ALLOW	0x7fff0000U /* allow */