From 1b6cfd1fc0b7499a28c24299a93a80bd18619563 Mon Sep 17 00:00:00 2001
From: Paul Moore <paul@paul-moore.com>
Date: Wed, 6 Nov 2019 22:28:05 -0500
Subject: [PATCH] tools: ensure a bpf file is specified on the command line

(imported from commit 94d42926fd67d2d4fa07031bdc6c6bf8e420a103)
Signed-off-by: Paul Moore <paul@paul-moore.com>
---
 tools/scmp_bpf_sim.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/scmp_bpf_sim.c b/tools/scmp_bpf_sim.c
index 73d056b1..14087178 100644
--- a/tools/scmp_bpf_sim.c
+++ b/tools/scmp_bpf_sim.c
@@ -340,6 +340,8 @@ int main(int argc, char *argv[])
 		exit_fault(ENOMEM);
 
 	/* load the bpf program */
+	if (opt_file == NULL)
+		exit_usage(argv[0]);
 	file = fopen(opt_file, "r");
 	if (file == NULL)
 		exit_fault(errno);