From: Kunwu Chan chentao@kylinos.cn
There is a 'malloc' call, which can be unsuccessful. This patch will add the malloc failure checking to avoid possible null dereference.
Signed-off-by: Kunwu Chan chentao@kylinos.cn --- tools/testing/selftests/bpf/test_progs.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c index 89ff704e9dad..ecc3ddeceeeb 100644 --- a/tools/testing/selftests/bpf/test_progs.c +++ b/tools/testing/selftests/bpf/test_progs.c @@ -582,6 +582,11 @@ int compare_stack_ips(int smap_fd, int amap_fd, int stack_trace_len)
val_buf1 = malloc(stack_trace_len); val_buf2 = malloc(stack_trace_len); + if (!val_buf1 || !val_buf2) { + err = -ENOMEM; + goto out; + } + cur_key_p = NULL; next_key_p = &key; while (bpf_map_get_next_key(smap_fd, cur_key_p, next_key_p) == 0) { @@ -1197,6 +1202,8 @@ static int dispatch_thread_send_subtests(int sock_fd, struct test_state *state) int subtest_num = state->subtest_num;
state->subtest_states = malloc(subtest_num * sizeof(*subtest_state)); + if (!state->subtest_states) + return -ENOMEM;
for (int i = 0; i < subtest_num; i++) { subtest_state = &state->subtest_states[i];