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-rw-r--r--kernel/auditsc.c2
-rw-r--r--kernel/bpf/syscall.c31
2 files changed, 32 insertions, 1 deletions
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 4effe01ebbe2..9bf1045fedfa 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2545,7 +2545,7 @@ void __audit_ntp_log(const struct audit_ntp_data *ad)
audit_log_ntp_val(ad, "adjust", AUDIT_NTP_ADJUST);
}
-static void audit_log_task(struct audit_buffer *ab)
+void audit_log_task(struct audit_buffer *ab)
{
kuid_t auid, uid;
kgid_t gid;
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index bac3becf9f90..17f4254495f2 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -23,6 +23,7 @@
#include <linux/timekeeping.h>
#include <linux/ctype.h>
#include <linux/nospec.h>
+#include <linux/audit.h>
#include <uapi/linux/btf.h>
#define IS_FD_ARRAY(map) ((map)->map_type == BPF_MAP_TYPE_PROG_ARRAY || \
@@ -1318,6 +1319,34 @@ static void free_used_maps(struct bpf_prog_aux *aux)
kfree(aux->used_maps);
}
+enum bpf_event {
+ BPF_EVENT_LOAD,
+ BPF_EVENT_UNLOAD,
+};
+
+static const char * const bpf_event_audit_str[] = {
+ [BPF_EVENT_LOAD] = "LOAD",
+ [BPF_EVENT_UNLOAD] = "UNLOAD",
+};
+
+static void bpf_audit_prog(const struct bpf_prog *prog, enum bpf_event event)
+{
+ bool has_task_context = event == BPF_EVENT_LOAD;
+ struct audit_buffer *ab;
+
+ if (audit_enabled == AUDIT_OFF)
+ return;
+ ab = audit_log_start(audit_context(), GFP_ATOMIC, AUDIT_BPF);
+ if (unlikely(!ab))
+ return;
+ if (has_task_context)
+ audit_log_task(ab);
+ audit_log_format(ab, "%sprog-id=%u event=%s",
+ has_task_context ? " " : "",
+ prog->aux->id, bpf_event_audit_str[event]);
+ audit_log_end(ab);
+}
+
int __bpf_prog_charge(struct user_struct *user, u32 pages)
{
unsigned long memlock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
@@ -1434,6 +1463,7 @@ static void __bpf_prog_put(struct bpf_prog *prog, bool do_idr_lock)
{
if (atomic64_dec_and_test(&prog->aux->refcnt)) {
perf_event_bpf_event(prog, PERF_BPF_EVENT_PROG_UNLOAD, 0);
+ bpf_audit_prog(prog, BPF_EVENT_UNLOAD);
/* bpf_prog_free_id() must be called first */
bpf_prog_free_id(prog, do_idr_lock);
__bpf_prog_put_noref(prog, true);
@@ -1843,6 +1873,7 @@ static int bpf_prog_load(union bpf_attr *attr, union bpf_attr __user *uattr)
*/
bpf_prog_kallsyms_add(prog);
perf_event_bpf_event(prog, PERF_BPF_EVENT_PROG_LOAD, 0);
+ bpf_audit_prog(prog, BPF_EVENT_LOAD);
err = bpf_prog_new_fd(prog);
if (err < 0)