samples: bpf: ensure that we don't load over MAX_PROGS programs

I can't see that we check prog_cnt to ensure it doesn't go over
MAX_PROGS.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index 89161c9ed466..904e775d1a44 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -107,6 +107,9 @@ static int load_and_attach(const char *event, struct bpf_insn *prog, int size)
                 return -1;
         }
 
+        if (prog_cnt == MAX_PROGS)
+                return -1;
+
         fd = bpf_load_program(prog_type, prog, insns_cnt, license, kern_version,
                               bpf_log_buf, BPF_LOG_BUF_SIZE);
         if (fd < 0) {