From b0294bc1ad19e9d2dd03df5faa1ccc395d4ddd4b Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 13 Jul 2018 18:11:39 +0300
Subject: [PATCH] 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>
---
samples/bpf/bpf_load.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index 89161c9ed466b..904e775d1a44c 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) {
--
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