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>,
Hengqi Chen <hengqi.chen@gmail.com>,
Ilya Leoshkevich <iii@linux.ibm.com>,
netdev@vger.kernel.org, bpf@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] bpftool: Fix NULL vs IS_ERR() checking
Date: Sun, 12 Dec 2021 05:04:12 +0000 [thread overview]
Message-ID: <20211212050415.17273-1-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/btf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/bpf/bpftool/btf.c b/tools/bpf/bpftool/btf.c
index 015d2758f826..4a561ec848c0 100644
--- a/tools/bpf/bpftool/btf.c
+++ b/tools/bpf/bpftool/btf.c
@@ -899,7 +899,7 @@ static int do_show(int argc, char **argv)
equal_fn_for_key_as_id, NULL);
btf_map_table = hashmap__new(hash_fn_for_key_as_id,
equal_fn_for_key_as_id, NULL);
- if (!btf_prog_table || !btf_map_table) {
+ if (IS_ERR(btf_prog_table) || IS_ERR(btf_map_table)) {
hashmap__free(btf_prog_table);
hashmap__free(btf_map_table);
if (fd >= 0)
--
2.17.1
reply other threads:[~2021-12-12 5:04 UTC|newest]
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