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8 Commits

Author SHA1 Message Date
Martin KaFai Lau
e710bcc6d9 bpf: selftest: Ensure the return value of bpf_skc_to helpers must be checked 
This patch tests:

int bpf_cls(struct __sk_buff *skb)
{
	/* REG_6: sk
	 * REG_7: tp
	 * REG_8: req_sk
	 */

	sk = skb->sk;
	if (!sk)
		return 0;

	tp = bpf_skc_to_tcp_sock(sk);
	req_sk = bpf_skc_to_tcp_request_sock(sk);
	if (!req_sk)
		return 0;

	/* !tp has not been tested, so verifier should reject. */
	return *(__u8 *)tp;
}

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201019194219.1051314-1-kafai@fb.com
 2020-10-19 15:57:42 -07:00
Alexei Starovoitov
7cec0b9271 selftests/bpf: Fix verifier test 
Adjust verifier test due to addition of new field.

Fixes: c3c16f2ea6 ("bpf: Add rx_queue_mapping to bpf_sock")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 2020-06-02 11:57:43 -07:00
Jakub Sitnicki
c321022244 selftests/bpf: Test allowed maps for bpf_sk_select_reuseport 
Check that verifier allows passing a map of type:

 BPF_MAP_TYPE_REUSEPORT_SOCKARRARY, or
 BPF_MAP_TYPE_SOCKMAP, or
 BPF_MAP_TYPE_SOCKHASH

... to bpf_sk_select_reuseport helper.

Suggested-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200430104738.494180-1-jakub@cloudflare.com
 2020-04-30 16:21:14 +02:00
Jakub Sitnicki
34a2cc6eee selftests/bpf: Test that lookup on SOCKMAP/SOCKHASH is allowed 
Now that bpf_map_lookup_elem() is white-listed for SOCKMAP/SOCKHASH,
replace the tests which check that verifier prevents lookup on these map
types with ones that ensure that lookup operation is permitted, but only
with a release of acquired socket reference.

Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20200429181154.479310-3-jakub@cloudflare.com
 2020-04-29 23:30:59 +02:00
Jonathan Lemon
940e7be34a tools/bpf: Add bpf_map_lookup_elem selftest for xskmap 
Check that bpf_map_lookup_elem lookup and structure
access operats correctly.

Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 2019-06-10 23:31:26 -07:00
Martin KaFai Lau
7a9bb9762d bpf: Add verifier tests for the bpf_sk_storage 
This patch adds verifier tests for the bpf_sk_storage:
1. ARG_PTR_TO_MAP_VALUE_OR_NULL
2. Map and helper compatibility (e.g. disallow bpf_map_loookup_elem)

It also takes this chance to remove the unused struct btf_raw_data
and uses the BTF encoding macros from "test_btf.h".

Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 2019-04-27 09:07:05 -07:00
Martin KaFai Lau
b55aa7b04b bpf: Test ref release issue in bpf_tcp_sock and bpf_sk_fullsock 
Adding verifier tests to ensure the ptr returned from bpf_tcp_sock() and
bpf_sk_fullsock() cannot be accessed after bpf_sk_release() is called.
A few of the tests are derived from a reproducer test by Lorenz Bauer.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 2019-03-13 12:04:35 -07:00
Martin KaFai Lau
fb47d1d931 bpf: Add skb->sk, bpf_sk_fullsock and bpf_tcp_sock tests to test_verifer 
This patch tests accessing the skb->sk and the new helpers,
bpf_sk_fullsock and bpf_tcp_sock.

The errstr of some existing "reference tracking" tests is changed
with s/bpf_sock/sock/ and s/socket/sock/ where "sock" is from the
verifier's reg_type_str[].

Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 2019-02-10 19:46:17 -08:00