From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Ilya Leoshkevich <iii@linux.ibm.com>,
Andrey Ignatov <rdna@fb.com>,
Daniel Borkmann <daniel@iogearbox.net>,
Sasha Levin <sashal@kernel.org>,
linux-kselftest@vger.kernel.org, netdev@vger.kernel.org,
bpf@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 08/68] selftests/bpf: fix sendmsg6_prog on s390
Date: Tue, 13 Aug 2019 22:14:46 -0400 [thread overview]
Message-ID: <20190814021548.16001-8-sashal@kernel.org> (raw)
In-Reply-To: <20190814021548.16001-1-sashal@kernel.org>
From: Ilya Leoshkevich <iii@linux.ibm.com>
[ Upstream commit c8eee4135a456bc031d67cadc454e76880d1afd8 ]
"sendmsg6: rewrite IP & port (C)" fails on s390, because the code in
sendmsg_v6_prog() assumes that (ctx->user_ip6[0] & 0xFFFF) refers to
leading IPv6 address digits, which is not the case on big-endian
machines.
Since checking bitwise operations doesn't seem to be the point of the
test, replace two short comparisons with a single int comparison.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/testing/selftests/bpf/sendmsg6_prog.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/sendmsg6_prog.c b/tools/testing/selftests/bpf/sendmsg6_prog.c
index 5aeaa284fc474..a680628204108 100644
--- a/tools/testing/selftests/bpf/sendmsg6_prog.c
+++ b/tools/testing/selftests/bpf/sendmsg6_prog.c
@@ -41,8 +41,7 @@ int sendmsg_v6_prog(struct bpf_sock_addr *ctx)
}
/* Rewrite destination. */
- if ((ctx->user_ip6[0] & 0xFFFF) == bpf_htons(0xFACE) &&
- ctx->user_ip6[0] >> 16 == bpf_htons(0xB00C)) {
+ if (ctx->user_ip6[0] == bpf_htonl(0xFACEB00C)) {
ctx->user_ip6[0] = bpf_htonl(DST_REWRITE_IP6_0);
ctx->user_ip6[1] = bpf_htonl(DST_REWRITE_IP6_1);
ctx->user_ip6[2] = bpf_htonl(DST_REWRITE_IP6_2);
--
2.20.1
next parent reply other threads:[~2019-08-14 2:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190814021548.16001-1-sashal@kernel.org>
2019-08-14 2:14 ` Sasha Levin [this message]
2019-08-14 2:14 ` [PATCH AUTOSEL 4.19 11/68] selftests: forwarding: gre_multipath: Enable IPv4 forwarding Sasha Levin
2019-08-14 2:14 ` [PATCH AUTOSEL 4.19 12/68] selftests: forwarding: gre_multipath: Fix flower filters Sasha Levin
2019-08-14 2:15 ` [PATCH AUTOSEL 4.19 68/68] selftests: kvm: Adding config fragments Sasha Levin
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