From: Yuntao Wang <ytcoode@gmail.com>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>
Cc: Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>, Shuah Khan <shuah@kernel.org>,
Hengqi Chen <hengqi.chen@gmail.com>,
netdev@vger.kernel.org, bpf@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
Yuntao Wang <ytcoode@gmail.com>
Subject: [PATCH bpf-next] selftests/bpf: Fix return value checks in perf_event_stackmap.c
Date: Thu, 7 Apr 2022 23:38:14 +0800 [thread overview]
Message-ID: <20220407153814.104914-1-ytcoode@gmail.com> (raw)
The bpf_get_stackid() function may also return 0 on success.
Signed-off-by: Yuntao Wang <ytcoode@gmail.com>
---
tools/testing/selftests/bpf/progs/perf_event_stackmap.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/progs/perf_event_stackmap.c b/tools/testing/selftests/bpf/progs/perf_event_stackmap.c
index b3fcb5274ee0..f793280a3238 100644
--- a/tools/testing/selftests/bpf/progs/perf_event_stackmap.c
+++ b/tools/testing/selftests/bpf/progs/perf_event_stackmap.c
@@ -35,10 +35,10 @@ int oncpu(void *ctx)
long val;
val = bpf_get_stackid(ctx, &stackmap, 0);
- if (val > 0)
+ if (val >= 0)
stackid_kernel = 2;
val = bpf_get_stackid(ctx, &stackmap, BPF_F_USER_STACK);
- if (val > 0)
+ if (val >= 0)
stackid_user = 2;
trace = bpf_map_lookup_elem(&stackdata_map, &key);
--
2.35.1
next reply other threads:[~2022-04-07 15:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-07 15:38 Yuntao Wang [this message]
2022-04-07 19:23 ` [PATCH bpf-next] selftests/bpf: Fix return value checks in perf_event_stackmap.c Shuah Khan
2022-04-08 4:14 ` [PATCH bpf-next v2] " Yuntao Wang
2022-04-08 21:09 ` patchwork-bot+netdevbpf
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