diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/percpu_alloc_fail.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/percpu_alloc_fail.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/percpu_alloc_fail.c b/tools/testing/selftests/bpf/progs/percpu_alloc_fail.c new file mode 100644 index 000000000000..f2b8eb2ff76f --- /dev/null +++ b/tools/testing/selftests/bpf/progs/percpu_alloc_fail.c @@ -0,0 +1,182 @@ +#include "bpf_experimental.h" +#include "bpf_misc.h" + +struct val_t { + long b, c, d; +}; + +struct val2_t { + long b; +}; + +struct val_with_ptr_t { + char *p; +}; + +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; +}; + +struct { + __uint(type, BPF_MAP_TYPE_ARRAY); + __uint(max_entries, 1); + __type(key, int); + __type(value, struct elem); +} array SEC(".maps"); + +long ret; + +SEC("?fentry/bpf_fentry_test1") +__failure __msg("store to referenced kptr disallowed") +int BPF_PROG(test_array_map_1) +{ + struct val_t __percpu_kptr *p; + struct elem *e; + int index = 0; + + e = bpf_map_lookup_elem(&array, &index); + if (!e) + return 0; + + p = bpf_percpu_obj_new(struct val_t); + if (!p) + return 0; + + p = bpf_kptr_xchg(&e->pc, p); + if (p) + bpf_percpu_obj_drop(p); + + e->pc = (struct val_t __percpu_kptr *)ret; + return 0; +} + +SEC("?fentry/bpf_fentry_test1") +__failure __msg("invalid kptr access, R2 type=percpu_ptr_val2_t expected=ptr_val_t") +int BPF_PROG(test_array_map_2) +{ + struct val2_t __percpu_kptr *p2; + struct val_t __percpu_kptr *p; + struct elem *e; + int index = 0; + + e = bpf_map_lookup_elem(&array, &index); + if (!e) + return 0; + + p2 = bpf_percpu_obj_new(struct val2_t); + if (!p2) + return 0; + + p = bpf_kptr_xchg(&e->pc, p2); + if (p) + bpf_percpu_obj_drop(p); + + return 0; +} + +SEC("?fentry.s/bpf_fentry_test1") +__failure __msg("R1 type=scalar expected=percpu_ptr_, percpu_rcu_ptr_, percpu_trusted_ptr_") +int BPF_PROG(test_array_map_3) +{ + struct val_t __percpu_kptr *p, *p1; + struct val_t *v; + struct elem *e; + int index = 0; + + e = bpf_map_lookup_elem(&array, &index); + if (!e) + return 0; + + p = bpf_percpu_obj_new(struct val_t); + if (!p) + return 0; + + p1 = bpf_kptr_xchg(&e->pc, p); + if (p1) + bpf_percpu_obj_drop(p1); + + v = bpf_this_cpu_ptr(p); + ret = v->b; + return 0; +} + +SEC("?fentry.s/bpf_fentry_test1") +__failure __msg("arg#0 expected for bpf_percpu_obj_drop_impl()") +int BPF_PROG(test_array_map_4) +{ + struct val_t __percpu_kptr *p; + + p = bpf_percpu_obj_new(struct val_t); + if (!p) + return 0; + + bpf_obj_drop(p); + return 0; +} + +SEC("?fentry.s/bpf_fentry_test1") +__failure __msg("arg#0 expected for bpf_obj_drop_impl()") +int BPF_PROG(test_array_map_5) +{ + struct val_t *p; + + p = bpf_obj_new(struct val_t); + if (!p) + return 0; + + bpf_percpu_obj_drop(p); + return 0; +} + +SEC("?fentry.s/bpf_fentry_test1") +__failure __msg("bpf_percpu_obj_new type ID argument must be of a struct of scalars") +int BPF_PROG(test_array_map_6) +{ + struct val_with_ptr_t __percpu_kptr *p; + + p = bpf_percpu_obj_new(struct val_with_ptr_t); + if (!p) + return 0; + + bpf_percpu_obj_drop(p); + return 0; +} + +SEC("?fentry.s/bpf_fentry_test1") +__failure __msg("bpf_percpu_obj_new type ID argument must not contain special fields") +int BPF_PROG(test_array_map_7) +{ + struct val_with_rb_root_t __percpu_kptr *p; + + p = bpf_percpu_obj_new(struct val_with_rb_root_t); + if (!p) + return 0; + + bpf_percpu_obj_drop(p); + 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"; |