linux-kernel - [PATCH v1] selftests/bpf: fix application of sizeof to pointer

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Message-Id: <20241117031838.161576-1-guanjing@cmss.chinamobile.com>
Date: Sun, 17 Nov 2024 11:18:38 +0800
From: guanjing <guanjing@...s.chinamobile.com>
To: andrii@...nel.org,
	eddyz87@...il.com,
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Cc: bpf@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	guanjing <guanjing@...s.chinamobile.com>
Subject: [PATCH v1] selftests/bpf: fix application of sizeof to pointer

sizeof when applied to a pointer typed expression gives the size of
the pointer.

tools/testing/selftests/bpf/progs/test_tunnel_kern.c:678:41-47: ERROR: application of sizeof to pointer

The proper fix in this particular case is to code sizeof(*gopt)
instead of sizeof(gopt).

This issue was detected with the help of Coccinelle.

Fixes: 5ddafcc377f9 ("selftests/bpf: Fix a few tests for GCC related warnings.")
Signed-off-by: guanjing <guanjing@...s.chinamobile.com>
---
 tools/testing/selftests/bpf/progs/test_tunnel_kern.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/progs/test_tunnel_kern.c b/tools/testing/selftests/bpf/progs/test_tunnel_kern.c
index 32127f1cd687..3a437cdc5c15 100644
--- a/tools/testing/selftests/bpf/progs/test_tunnel_kern.c
+++ b/tools/testing/selftests/bpf/progs/test_tunnel_kern.c
@@ -675,7 +675,7 @@ int ip6geneve_set_tunnel(struct __sk_buff *skb)
 	gopt->length = 2; /* 4-byte multiple */
 	*(int *) &gopt->opt_data = bpf_htonl(0xfeedbeef);
 
-	ret = bpf_skb_set_tunnel_opt(skb, gopt, sizeof(gopt));
+	ret = bpf_skb_set_tunnel_opt(skb, gopt, sizeof(*gopt));
 	if (ret < 0) {
 		log_err(ret);
 		return TC_ACT_SHOT;
-- 
2.33.0