linux-kernel - [PATCH 4.19 47/58] selftests/bpf: add "any alignment" annotation for some tests

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Date:   Tue,  8 Jun 2021 20:27:28 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Björn Töpel <bjorn.topel@...il.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Tiezhu Yang <yangtiezhu@...ngson.cn>
Subject: [PATCH 4.19 47/58] selftests/bpf: add "any alignment" annotation for some tests

From: Björn Töpel <bjorn.topel@...il.com>

commit e2c6f50e48849298bed694de03cceb537d95cdc4 upstream

RISC-V does, in-general, not have "efficient unaligned access". When
testing the RISC-V BPF JIT, some selftests failed in the verification
due to misaligned access. Annotate these tests with the
F_NEEDS_EFFICIENT_UNALIGNED_ACCESS flag.

Signed-off-by: Björn Töpel <bjorn.topel@...il.com>
Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 tools/testing/selftests/bpf/test_verifier.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/tools/testing/selftests/bpf/test_verifier.c
+++ b/tools/testing/selftests/bpf/test_verifier.c
@@ -963,6 +963,7 @@ static struct bpf_test tests[] = {
 		.errstr_unpriv = "attempt to corrupt spilled",
 		.errstr = "corrupted spill",
 		.result = REJECT,
+		.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
 	},
 	{
 		"invalid src register in STX",
@@ -1777,6 +1778,7 @@ static struct bpf_test tests[] = {
 		.errstr = "invalid bpf_context access",
 		.result = REJECT,
 		.prog_type = BPF_PROG_TYPE_SK_MSG,
+		.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
 	},
 	{
 		"invalid read past end of SK_MSG",
@@ -2176,6 +2178,7 @@ static struct bpf_test tests[] = {
 		},
 		.errstr = "invalid bpf_context access",
 		.result = REJECT,
+		.flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS,
 	},
 	{
 		"check skb->hash half load not permitted, unaligned 3",