diff mbox series

[bpf-next,v2,4/4] selftests/bpf: Add a null pointer check for the serial_test_tp_attach_query

Message ID 20240510095803.472840-5-kunwu.chan@linux.dev (mailing list archive)
State New
Headers show
Series Add some 'malloc' failure checks | expand

Commit Message

Kunwu Chan May 10, 2024, 9:58 a.m. UTC 
From: Kunwu Chan <chentao@kylinos.cn>

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@kylinos.cn>
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
---
Changes in v2:
	- Use ASSERT* instead of CHECK
	- Add suggested-by tag
---
 tools/testing/selftests/bpf/prog_tests/tp_attach_query.c | 3 +++
 1 file changed, 3 insertions(+)

Comments

Muhammad Usama Anjum May 10, 2024, 11:24 a.m. UTC | #1 
On 5/10/24 2:58 PM, kunwu.chan@linux.dev wrote:
> From: Kunwu Chan <chentao@kylinos.cn>
> 
> 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@kylinos.cn>
> Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
> ---
> Changes in v2:
> 	- Use ASSERT* instead of CHECK
> 	- Add suggested-by tag
> ---
>  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..a5ebfc172ad8 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 (!ASSERT_OK_PTR(query, "malloc"))
> +		return;
> +
LGTM
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>

>  	for (i = 0; i < num_progs; i++) {
>  		err = bpf_prog_test_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj[i],
>  				    &prog_fd[i]);
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Patch

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..a5ebfc172ad8 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 (!ASSERT_OK_PTR(query, "malloc"))
+		return;
+
 	for (i = 0; i < num_progs; i++) {
 		err = bpf_prog_test_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj[i],
 				    &prog_fd[i]);