1 files changed, 8 insertions, 0 deletions

diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 27d1f4ffa3de..0ce99c379c30 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -759,6 +759,8 @@ const struct bpf_prog_ops perf_event_prog_ops = {
 
 static DEFINE_MUTEX(bpf_event_mutex);
 
+#define BPF_TRACE_MAX_PROGS 64
+
 int perf_event_attach_bpf_prog(struct perf_event *event,
                                struct bpf_prog *prog)
 {
@@ -772,6 +774,12 @@ int perf_event_attach_bpf_prog(struct perf_event *event,
                 goto unlock;
 
         old_array = event->tp_event->prog_array;
+        if (old_array &&
+            bpf_prog_array_length(old_array) >= BPF_TRACE_MAX_PROGS) {
+                ret = -E2BIG;
+                goto unlock;
+        }
+
         ret = bpf_prog_array_copy(old_array, NULL, prog, &new_array);
         if (ret < 0)
                 goto unlock;