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| author | Daniel Borkmann <dborkman@redhat.com> | 2014-05-29 10:22:49 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-06-01 22:16:58 -0700 |
| commit | d50bc1575096250aa37f17299c86ea548156efe8 (patch) | |
| tree | f606b52b3a98a9a3a9514dcf774cdff0b83b3499 /lib | |
| parent | 9fe13baad6b1e8d3063dd48faf1b9be9b7c5e92c (diff) | |
| download | lwn-d50bc1575096250aa37f17299c86ea548156efe8.tar.gz lwn-d50bc1575096250aa37f17299c86ea548156efe8.zip | |
net: filter: add test for loading SKF_AD_OFF limits
This check tests that overloading BPF_LD | BPF_ABS with an
always invalid BPF extension, that is SKF_AD_MAX, fails to
make sure classic BPF behaviour is correct in filter checker.
Also, we add a test for loading at packet offset SKF_AD_OFF-1
which should pass the filter, but later on fail during runtime.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/test_bpf.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/test_bpf.c b/lib/test_bpf.c index 2d0a0d141793..f8d2b2a13131 100644 --- a/lib/test_bpf.c +++ b/lib/test_bpf.c @@ -1655,6 +1655,28 @@ static struct bpf_test tests[] = { { }, { { 0, 0x2a5a5e5 } }, }, + { + "check: SKF_AD_MAX", + .u.insns = { + BPF_STMT(BPF_LD | BPF_W | BPF_ABS, + SKF_AD_OFF + SKF_AD_MAX), + BPF_STMT(BPF_RET | BPF_A, 0), + }, + CLASSIC | FLAG_NO_DATA | FLAG_EXPECTED_FAIL, + { }, + { }, + }, + { /* Passes checker but fails during runtime. */ + "LD [SKF_AD_OFF-1]", + .u.insns = { + BPF_STMT(BPF_LD | BPF_W | BPF_ABS, + SKF_AD_OFF - 1), + BPF_STMT(BPF_RET | BPF_K, 1), + }, + CLASSIC, + { }, + { { 1, 0 } }, + }, }; static struct net_device dev; |