From: Ilya Leoshkevich <iii@linux.ibm.com>
Date: Fri, 30 Aug 2019 13:07:30 +0200
Subject: selftests/bpf: fix "ctx:write sysctl:write read ok" on s390
Patch-mainline: v5.4-rc1
Git-commit: 3404ddf234ba4677bf224cb15ddcdea0ceab956e
References: bsc#1155518
"ctx:write sysctl:write read ok" fails on s390 because it reads the
first byte of an int assuming it's the least-significant one, which
is not the case on big-endian arches. Since we are not testing narrow
accesses here (there is e.g. "ctx:file_pos sysctl:read read ok narrow"
for that), simply read the whole int.
Fixes: 1f5fa9ab6e2e ("selftests/bpf: Test BPF_CGROUP_SYSCTL")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Gary Lin <glin@suse.com>
---
tools/testing/selftests/bpf/test_sysctl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/testing/selftests/bpf/test_sysctl.c
+++ b/tools/testing/selftests/bpf/test_sysctl.c
@@ -100,7 +100,7 @@ static struct sysctl_test tests[] = {
.descr = "ctx:write sysctl:write read ok",
.insns = {
/* If (write) */
- BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_1,
+ BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_1,
offsetof(struct bpf_sysctl, write)),
BPF_JMP_IMM(BPF_JNE, BPF_REG_7, 1, 2),