linux-kernel - [PATCH 15/15] samples/bpf: Reset global variables

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Message-Id: <20170214011400.13352-16-acme@kernel.org>
Date:   Mon, 13 Feb 2017 22:14:00 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Mickaël Salaün <mic@...ikod.net>,
        Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>,
        "David S . Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 15/15] samples/bpf: Reset global variables

From: Mickaël Salaün <mic@...ikod.net>

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

Signed-off-by: Mickaël Salaün <mic@...ikod.net>
Acked-by: Joe Stringer <joe@....org>
Acked-by: Wang Nan <wangnan0@...wei.com>
Cc: Alexei Starovoitov <ast@...com>
Cc: Daniel Borkmann <daniel@...earbox.net>
Cc: David S. Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org
Link: http://lkml.kernel.org/r/20170208202744.16274-3-mic@digikod.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 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;
 
-- 
2.9.3