From: Miaoqian Lin <linmq006@gmail.com>
To: unlisted-recipients:; (no To-header on input)
Cc: linmq006@gmail.com, Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
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>,
Quentin Monnet <quentin@isovalent.com>,
Cong Wang <cong.wang@bytedance.com>,
Hengqi Chen <hengqi.chen@gmail.com>,
netdev@vger.kernel.org, bpf@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] bpftool: Fix NULL vs IS_ERR() checking in do_show()
Date: Sun, 12 Dec 2021 04:42:08 +0000 [thread overview]
Message-ID: <20211212044212.12551-1-linmq006@gmail.com> (raw)
The hashmap__new() function does not return NULL on errors. It returns
ERR_PTR(-ENOMEM). Using IS_ERR() to check the return value
to fix this.
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
tools/bpf/bpftool/prog.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
index 515d22952602..564a15f881c6 100644
--- a/tools/bpf/bpftool/prog.c
+++ b/tools/bpf/bpftool/prog.c
@@ -571,7 +571,7 @@ static int do_show(int argc, char **argv)
if (show_pinned) {
prog_table = hashmap__new(hash_fn_for_key_as_id,
equal_fn_for_key_as_id, NULL);
- if (!prog_table) {
+ if (IS_ERR(prog_table)) {
p_err("failed to create hashmap for pinned paths");
return -1;
}
--
2.17.1
reply other threads:[~2021-12-12 4:42 UTC|newest]
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