test_snprintf_btf fails on s390, because NULL points to a readable
struct lowcore there. Fix by using _REGION1_SIZE instead.
Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
---
tools/testing/selftests/bpf/progs/netif_receive_skb.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/progs/netif_receive_skb.c b/tools/testing/selftests/bpf/progs/netif_receive_skb.c
index 6b670039ea67..fa54d2abc41e 100644
--- a/tools/testing/selftests/bpf/progs/netif_receive_skb.c
+++ b/tools/testing/selftests/bpf/progs/netif_receive_skb.c
@@ -16,6 +16,13 @@ bool skip = false;
#define STRSIZE 2048
#define EXPECTED_STRSIZE 256
+#if defined(bpf_target_s390)
+/* NULL points to a readable struct lowcore on s390, so take _REGION1_SIZE */
+#define BADPTR ((void *)(1ULL << 53))
+#else
+#define BADPTR 0
+#endif
+
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#endif
@@ -114,9 +121,9 @@ int BPF_PROG(trace_netif_receive_skb, struct sk_buff *skb)
/* Check invalid ptr value */
p.ptr = 0;
- __ret = bpf_snprintf_btf(str, STRSIZE, &p, sizeof(p), 0);
+ __ret = bpf_snprintf_btf(str, STRSIZE, &p, sizeof(p), BADPTR);
if (__ret >= 0) {
- bpf_printk("printing NULL should generate error, got (%d)",
+ bpf_printk("printing BADPTR should generate error, got (%d)",
__ret);
ret = -ERANGE;
}
--
2.29.2
