Fix the return value of bpf_strstr_tp_loop when it does not meet the …

…valid range (#1294)
grafana · Oct 31, 2024 · 56e5b9b · 56e5b9b
1 parent d3b2240
commit 56e5b9b
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/bpf/trace_common.h b/bpf/trace_common.h
@@ -93,8 +93,7 @@ static __always_inline unsigned char *bpf_strstr_tp_loop(unsigned char *buf, int
     bpf_loop(nr_loops, tp_match, &data, 0);
 
     if (data.pos) {
-        u32 pos = (data.pos > (TRACE_BUF_SIZE - TRACE_PARENT_HEADER_LEN)) ? 0 : data.pos;
-        return &(buf[pos]);
+        return (data.pos > (TRACE_BUF_SIZE - TRACE_PARENT_HEADER_LEN)) ? 0 : &(buf[data.pos]);
     }
 
     return 0;