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-rw-r--r--src/core/execute.c2
-rw-r--r--src/shared/seccomp-util.c19
2 files changed, 16 insertions, 5 deletions
diff --git a/src/core/execute.c b/src/core/execute.c
index 55f15d7e49..2026137721 100644
--- a/src/core/execute.c
+++ b/src/core/execute.c
@@ -1077,7 +1077,7 @@ static void rename_process_from_path(const char *path) {
static bool skip_seccomp_unavailable(const Unit* u, const char* msg) {
if (!is_seccomp_available()) {
log_open();
- log_unit_debug(u, "SECCOMP not detected in the kernel, skipping %s", msg);
+ log_unit_debug(u, "SECCOMP features not detected in the kernel, skipping %s", msg);
log_close();
return true;
}
diff --git a/src/shared/seccomp-util.c b/src/shared/seccomp-util.c
index 6c489284d1..2f42381fc1 100644
--- a/src/shared/seccomp-util.c
+++ b/src/shared/seccomp-util.c
@@ -20,9 +20,9 @@
#include <errno.h>
#include <seccomp.h>
#include <stddef.h>
+#include <sys/prctl.h>
+#include <linux/seccomp.h>
-#include "alloc-util.h"
-#include "fileio.h"
#include "macro.h"
#include "seccomp-util.h"
#include "string-util.h"
@@ -91,11 +91,22 @@ int seccomp_add_secondary_archs(scmp_filter_ctx *c) {
}
+static bool is_basic_seccomp_available(void) {
+ int r;
+ r = prctl(PR_GET_SECCOMP, 0, 0, 0, 0);
+ return r >= 0;
+}
+
+static bool is_seccomp_filter_available(void) {
+ int r;
+ r = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, NULL, 0, 0);
+ return r < 0 && errno == EFAULT;
+}
+
bool is_seccomp_available(void) {
- _cleanup_free_ char* field = NULL;
static int cached_enabled = -1;
if (cached_enabled < 0)
- cached_enabled = get_proc_field("/proc/self/status", "Seccomp", "\n", &field) == 0;
+ cached_enabled = is_basic_seccomp_available() && is_seccomp_filter_available();
return cached_enabled;
}