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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Lorenz Bauer <lorenz.bauer@isovalent.com>,
	Lorenz Bauer <lmb@isovalent.com>,
	Martin KaFai Lau <martin.lau@kernel.org>,
	Sasha Levin <sashal@kernel.org>,
	ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
	shuah@kernel.org, yhs@fb.com, eddyz87@gmail.com, sdf@google.com,
	error27@gmail.com, iii@linux.ibm.com, memxor@gmail.com,
	bpf@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: [PATCH AUTOSEL 6.2 08/30] selftests/bpf: check that modifier resolves after pointer
Date: Sun, 19 Mar 2023 20:52:33 -0400	[thread overview]
Message-ID: <20230320005258.1428043-8-sashal@kernel.org> (raw)
In-Reply-To: <20230320005258.1428043-1-sashal@kernel.org>

From: Lorenz Bauer <lorenz.bauer@isovalent.com>

[ Upstream commit dfdd608c3b365f0fd49d7e13911ebcde06b9865b ]

Add a regression test that ensures that a VAR pointing at a
modifier which follows a PTR (or STRUCT or ARRAY) is resolved
correctly by the datasec validator.

Signed-off-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/r/20230306112138.155352-3-lmb@isovalent.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/testing/selftests/bpf/prog_tests/btf.c | 28 ++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/tools/testing/selftests/bpf/prog_tests/btf.c b/tools/testing/selftests/bpf/prog_tests/btf.c
index de1b5b9eb93a8..d8d1292e73b53 100644
--- a/tools/testing/selftests/bpf/prog_tests/btf.c
+++ b/tools/testing/selftests/bpf/prog_tests/btf.c
@@ -879,6 +879,34 @@ static struct btf_raw_test raw_tests[] = {
 	.btf_load_err = true,
 	.err_str = "Invalid elem",
 },
+{
+	.descr = "var after datasec, ptr followed by modifier",
+	.raw_types = {
+		/* .bss section */				/* [1] */
+		BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_DATASEC, 0, 2),
+			sizeof(void*)+4),
+		BTF_VAR_SECINFO_ENC(4, 0, sizeof(void*)),
+		BTF_VAR_SECINFO_ENC(6, sizeof(void*), 4),
+		/* int */					/* [2] */
+		BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),
+		/* int* */					/* [3] */
+		BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), 2),
+		BTF_VAR_ENC(NAME_TBD, 3, 0),			/* [4] */
+		/* const int */					/* [5] */
+		BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), 2),
+		BTF_VAR_ENC(NAME_TBD, 5, 0),			/* [6] */
+		BTF_END_RAW,
+	},
+	.str_sec = "\0a\0b\0c\0",
+	.str_sec_size = sizeof("\0a\0b\0c\0"),
+	.map_type = BPF_MAP_TYPE_ARRAY,
+	.map_name = ".bss",
+	.key_size = sizeof(int),
+	.value_size = sizeof(void*)+4,
+	.key_type_id = 0,
+	.value_type_id = 1,
+	.max_entries = 1,
+},
 /* Test member exceeds the size of struct.
  *
  * struct A {
-- 
2.39.2


       reply	other threads:[~2023-03-20  0:54 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20230320005258.1428043-1-sashal@kernel.org>
2023-03-20  0:52 ` Sasha Levin [this message]
2023-03-20 15:31   ` [PATCH AUTOSEL 6.2 08/30] selftests/bpf: check that modifier resolves after pointer Lorenz Bauer
2023-03-20 15:48     ` Greg KH
2023-03-28 10:18       ` Lorenz Bauer
2023-04-11 15:08         ` Lorenz Bauer
2023-04-11 15:14           ` Greg KH
2023-05-24 11:03             ` Lorenz Bauer
2023-05-24 16:03               ` Greg KH
2023-05-24 17:04                 ` Lorenz Bauer
2023-05-26 16:43                   ` Greg KH
2023-05-30 11:24                     ` Lorenz Bauer

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