Commit adc8c454 authored by Yonghong Song's avatar Yonghong Song Committed by Alexei Starovoitov
Browse files

selftests/bpf: Add a selftest with > 512-byte percpu allocation size 



Add a selftest to capture the verification failure when the allocation
size is greater than 512.

Acked-by: default avatarHou Tao <houtao1@huawei.com>
Signed-off-by: default avatarYonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20231222031812.1293190-1-yonghong.song@linux.dev


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 21f5a801

tools/testing/selftests/bpf/progs/percpu_alloc_fail.c

+18 −0
Original line number Diff line number Diff line
@@ -17,6 +17,10 @@ struct val_with_rb_root_t { 
	struct bpf_spin_lock lock;

};



struct val_600b_t {

	char b[600];

};



struct elem {

	long sum;

	struct val_t __percpu_kptr *pc;
@@ -161,4 +165,18 @@ int BPF_PROG(test_array_map_7) 
	return 0;

}



SEC("?fentry.s/bpf_fentry_test1")

__failure __msg("bpf_percpu_obj_new type size (600) is greater than 512")

int BPF_PROG(test_array_map_8)

{

	struct val_600b_t __percpu_kptr *p;



	p = bpf_percpu_obj_new(struct val_600b_t);

	if (!p)

		return 0;



	bpf_percpu_obj_drop(p);

	return 0;

}



char _license[] SEC("license") = "GPL";