From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Eric Dumazet <edumazet@google.com>,
Stanislav Fomichev <sdf@google.com>,
Alexei Starovoitov <ast@kernel.org>,
Sasha Levin <sashal@kernel.org>,
linux-kselftest@vger.kernel.org, netdev@vger.kernel.org,
bpf@vger.kernel.org
Subject: [PATCH AUTOSEL 5.2 035/123] selftests/bpf: add another gso_segs access
Date: Tue, 13 Aug 2019 22:09:19 -0400 [thread overview]
Message-ID: <20190814021047.14828-35-sashal@kernel.org> (raw)
In-Reply-To: <20190814021047.14828-1-sashal@kernel.org>
From: Eric Dumazet <edumazet@google.com>
[ Upstream commit be69483bf4f3abaaca5d5ba460dbb50239463552 ]
Use BPF_REG_1 for source and destination of gso_segs read,
to exercise "bpf: fix access to skb_shared_info->gso_segs" fix.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Suggested-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/testing/selftests/bpf/verifier/ctx_skb.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/tools/testing/selftests/bpf/verifier/ctx_skb.c b/tools/testing/selftests/bpf/verifier/ctx_skb.c
index b0fda2877119c..d438193804b21 100644
--- a/tools/testing/selftests/bpf/verifier/ctx_skb.c
+++ b/tools/testing/selftests/bpf/verifier/ctx_skb.c
@@ -974,6 +974,17 @@
.result = ACCEPT,
.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
},
+{
+ "read gso_segs from CGROUP_SKB",
+ .insns = {
+ BPF_LDX_MEM(BPF_W, BPF_REG_1, BPF_REG_1,
+ offsetof(struct __sk_buff, gso_segs)),
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ .prog_type = BPF_PROG_TYPE_CGROUP_SKB,
+},
{
"write gso_segs from CGROUP_SKB",
.insns = {
--
2.20.1
next prev parent reply other threads:[~2019-08-14 2:38 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190814021047.14828-1-sashal@kernel.org>
2019-08-14 2:09 ` [PATCH AUTOSEL 5.2 020/123] libbpf: sanitize VAR to conservative 1-byte INT Sasha Levin
2019-08-14 2:09 ` [PATCH AUTOSEL 5.2 025/123] bpf: sockmap, sock_map_delete needs to use xchg Sasha Levin
2019-08-14 2:09 ` [PATCH AUTOSEL 5.2 026/123] bpf: sockmap, synchronize_rcu before free'ing map Sasha Levin
2019-08-14 2:09 ` [PATCH AUTOSEL 5.2 027/123] bpf: sockmap, only create entry if ulp is not already enabled Sasha Levin
2019-08-14 2:09 ` [PATCH AUTOSEL 5.2 028/123] selftests/bpf: fix sendmsg6_prog on s390 Sasha Levin
2019-08-14 2:09 ` [PATCH AUTOSEL 5.2 034/123] bpf: fix access to skb_shared_info->gso_segs Sasha Levin
2019-08-14 2:09 ` Sasha Levin [this message]
2019-08-14 2:09 ` [PATCH AUTOSEL 5.2 036/123] libbpf: fix using uninitialized ioctl results Sasha Levin
2019-08-14 2:09 ` [PATCH AUTOSEL 5.2 042/123] libbpf: silence GCC8 warning about string truncation Sasha Levin
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