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Message-Id: <20240424020444.2375773-5-chentao@kylinos.cn>
Date: Wed, 24 Apr 2024 10:04:44 +0800
From: Kunwu Chan <chentao@...inos.cn>
To: ast@...nel.org,
daniel@...earbox.net,
andrii@...nel.org,
martin.lau@...ux.dev,
eddyz87@...il.com,
song@...nel.org,
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Cc: bpf@...r.kernel.org,
linux-kselftest@...r.kernel.org,
linux-kernel@...r.kernel.org,
Kunwu Chan <chentao@...inos.cn>
Subject: [PATCH bpf-next 4/4] selftests/bpf: Add a null pointer check for the serial_test_tp_attach_query
There is a 'malloc' call, which can be unsuccessful.
Add the malloc failure checking to avoid possible null
dereference.
Signed-off-by: Kunwu Chan <chentao@...inos.cn>
---
tools/testing/selftests/bpf/prog_tests/tp_attach_query.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/testing/selftests/bpf/prog_tests/tp_attach_query.c b/tools/testing/selftests/bpf/prog_tests/tp_attach_query.c
index 655d69f0ff0b..302b25408a53 100644
--- a/tools/testing/selftests/bpf/prog_tests/tp_attach_query.c
+++ b/tools/testing/selftests/bpf/prog_tests/tp_attach_query.c
@@ -39,6 +39,9 @@ void serial_test_tp_attach_query(void)
attr.wakeup_events = 1;
query = malloc(sizeof(*query) + sizeof(__u32) * num_progs);
+ if (CHECK(!query, "malloc()", "error:%s\n", strerror(errno)))
+ return;
+
for (i = 0; i < num_progs; i++) {
err = bpf_prog_test_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj[i],
&prog_fd[i]);
--
2.40.1
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