Merge tag 'net-next-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev...

[mirror_ubuntu-jammy-kernel.git] / samples / bpf / tracex7_user.c

diff --git a/samples/bpf/tracex7_user.c b/samples/bpf/tracex7_user.c
index fdcd6580dd736a23639e385f7da363a442064db9..8be7ce18d3ba05682aeaf6c32223f3b22cd499a4 100644 (file)
--- a/samples/bpf/tracex7_user.c
+++ b/samples/bpf/tracex7_user.c
@@ -14,6 +14,11 @@ int main(int argc, char **argv)
        int ret = 0;
        FILE *f;
 
+       if (!argv[1]) {
+               fprintf(stderr, "ERROR: Run with the btrfs device argument!\n");
+               return 0;
+       }
+
        snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
        obj = bpf_object__open_file(filename, NULL);
        if (libbpf_get_error(obj)) {