linux-kernel - [PATCH net-next v1 3/7] samples/bpf: Reset global variables

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Date:   Mon,  6 Feb 2017 00:14:24 +0100
From:   Mickaël Salaün <mic@...ikod.net>
To:     linux-kernel@...r.kernel.org
Cc:     Mickaël Salaün <mic@...ikod.net>,
        netdev@...r.kernel.org, Alexei Starovoitov <ast@...com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        "David S . Miller" <davem@...emloft.net>
Subject: [PATCH net-next v1 3/7] samples/bpf: Reset global variables

Before loading a new ELF, clean previous kernel version, license and
processed sections.

Signed-off-by: Mickaël Salaün <mic@...ikod.net>
Cc: Alexei Starovoitov <ast@...com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Daniel Borkmann <daniel@...earbox.net>
Cc: David S. Miller <davem@...emloft.net>
---
 samples/bpf/bpf_load.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index e04fe09d7c2e..b86ee54da2d1 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -277,6 +277,11 @@ int load_bpf_file(char *path)
 	Elf_Data *data, *data_prog, *symbols = NULL;
 	char *shname, *shname_prog;
 
+	/* reset global variables */
+	kern_version = 0;
+	memset(license, 0, sizeof(license));
+	memset(processed_sec, 0, sizeof(processed_sec));
+
 	if (elf_version(EV_CURRENT) == EV_NONE)
 		return 1;
 
-- 
2.11.0