Do bounds checking on references to the bids array.

Addresses GitHub issue #484.

1 files changed, 3 insertions, 2 deletions

diff --git a/bpf_dump.c b/bpf_dump.c
index b59d6073..a9c91169 100644
--- a/bpf_dump.c
+++ b/bpf_dump.c
@@ -26,6 +26,8 @@
 #include <pcap.h>
 #include <stdio.h>
 
+#include "optimize.h"
+
 void
 bpf_dump(const struct bpf_program *p, int option)
 {
@@ -50,8 +52,7 @@ bpf_dump(const struct bpf_program *p, int option)
 	}
 	for (i = 0; i < n; ++insn, ++i) {
 #ifdef BDEBUG
-		extern int bids[];
-		if (bids[i] > 0)
+		if (i < NBIDS && bids[i] > 0)
 			printf("[%02d]", bids[i] - 1);
 		else
 			printf(" -- ");