git: 78534b222b99 - stable/13 - binmiscctl: Avoid segfault with "binmiscctl add" and no extra params

[Mark Johnston]

The branch stable/13 has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=78534b222b99f516f1f464675ad0bd92f880f3cf

commit 78534b222b99f516f1f464675ad0bd92f880f3cf
Author:     Mark Johnston <markj at FreeBSD.org>
AuthorDate: 2021-02-08 14:20:38 +0000
Commit:     Mark Johnston <markj at FreeBSD.org>
CommitDate: 2021-02-15 19:12:25 +0000

    binmiscctl: Avoid segfault with "binmiscctl add" and no extra params
    
    (cherry picked from commit c7fcb36f5670b1d6c1f80c3c29d9d2ba374807f7)
---
 usr.sbin/binmiscctl/binmiscctl.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/usr.sbin/binmiscctl/binmiscctl.c b/usr.sbin/binmiscctl/binmiscctl.c
index 471f4c2c68dd..3c5e19def67b 100644
--- a/usr.sbin/binmiscctl/binmiscctl.c
+++ b/usr.sbin/binmiscctl/binmiscctl.c
@@ -284,6 +284,8 @@ add_cmd(__unused int argc, char *argv[], ximgact_binmisc_entry_t *xbe)
 	char *magic = NULL, *mask = NULL;
 	int sz;
 
+	if (argc == 0)
+		usage("Required argument missing\n");
 	if (strlen(argv[0]) > IBE_NAME_MAX)
 		usage("'%s' string length longer than IBE_NAME_MAX (%d)",
 		    IBE_NAME_MAX);