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

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

Acked-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20231222031812.1293190-1-yonghong.song@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Yonghong Song 2023-12-21 19:18:12 -08:00 • committed by Alexei Starovoitov
parent 21f5a801c1
commit adc8c4549d
1 changed files with 18 additions and 0 deletions
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18
tools/testing/selftests/bpf/progs/percpu_alloc_fail.c
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@ -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";