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From: Florian Fainelli <f.fainelli@gmail.com>
To: bpf@vger.kernel.org
Cc: Florian Fainelli <f.fainelli@gmail.com>,
	Andrii Nakryiko <andrii@kernel.org>,
	Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Martin KaFai Lau <martin.lau@linux.dev>,
	Song Liu <song@kernel.org>, Yonghong Song <yhs@fb.com>,
	John Fastabend <john.fastabend@gmail.com>,
	KP Singh <kpsingh@kernel.org>,
	Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>,
	Jiri Olsa <jolsa@kernel.org>,
	Dave Marchevsky <davemarchevsky@fb.com>,
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] libbpf: Initialize err in probe_map_create
Date: Sun, 31 Jul 2022 19:51:09 -0700	[thread overview]
Message-ID: <20220801025109.1206633-1-f.fainelli@gmail.com> (raw)

GCC-11 warns about the possibly unitialized err variable in
probe_map_create:

libbpf_probes.c: In function 'probe_map_create':
libbpf_probes.c:361:38: error: 'err' may be used uninitialized in this function [-Werror=maybe-uninitialized]
  361 |                 return fd < 0 && err == exp_err ? 1 : 0;
      |                                  ~~~~^~~~~~~~~~

Fixes: 878d8def0603 ("libbpf: Rework feature-probing APIs")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 tools/lib/bpf/libbpf_probes.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/bpf/libbpf_probes.c b/tools/lib/bpf/libbpf_probes.c
index 97b06cede56f..6cf44e61815d 100644
--- a/tools/lib/bpf/libbpf_probes.c
+++ b/tools/lib/bpf/libbpf_probes.c
@@ -247,7 +247,7 @@ static int probe_map_create(enum bpf_map_type map_type, __u32 ifindex)
 	LIBBPF_OPTS(bpf_map_create_opts, opts);
 	int key_size, value_size, max_entries;
 	__u32 btf_key_type_id = 0, btf_value_type_id = 0;
-	int fd = -1, btf_fd = -1, fd_inner = -1, exp_err = 0, err;
+	int fd = -1, btf_fd = -1, fd_inner = -1, exp_err = 0, err = 0;
 
 	opts.map_ifindex = ifindex;
 
-- 
2.25.1


             reply	other threads:[~2022-08-01  2:51 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-01  2:51 Florian Fainelli [this message]
2022-08-01 16:25 ` [PATCH] libbpf: Initialize err in probe_map_create Jiri Olsa
2022-08-04 21:50 ` patchwork-bot+netdevbpf
2022-08-31 21:50   ` Florian Fainelli

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