samples/bpf: Reset global variables

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

Signed-off-by: Mickaël Salaün <mic@digikod.net>
Acked-by: Joe Stringer <joe@ovn.org>
Acked-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David S. Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Link: http://lkml.kernel.org/r/20170208202744.16274-3-mic@digikod.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index e04fe09d7c2efc397a8ba6435c44d72ecc3c11cc..b86ee54da2d14d6ba0de18481d2c55ed1a70a67b 100644 (file)
--- 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;