From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 13 Jul 2018 18:11:39 +0300
Subject: samples: bpf: ensure that we don't load over MAX_PROGS programs
Patch-mainline: v4.19-rc1
Git-commit: b0294bc1ad19e9d2dd03df5faa1ccc395d4ddd4b
References: bsc#1109837
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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
samples/bpf/bpf_load.c | 3 +++
1 file changed, 3 insertions(+)
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -106,6 +106,9 @@ static int load_and_attach(const char *e
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) {