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selftests/bpf: Add tests for iter arg check

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Add selftests to cover argument type check for iterator kfuncs, and
cover all three kinds (new, next, destroy). Without the fix in the
previous patch, the selftest would not cause a verifier error.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20241203000238.3602922-3-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Kumar Kartikeya Dwivedi 2024-12-02 16:02:38 -08:00 committed by Alexei Starovoitov
parent 12659d2861
commit 7f71197001
1 changed files with 26 additions and 0 deletions
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26
tools/testing/selftests/bpf/progs/iters.c
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@ -1486,4 +1486,30 @@ int iter_subprog_check_stacksafe(const void *ctx)
return 0;
}
struct bpf_iter_num global_it;
SEC("raw_tp")
__failure __msg("arg#0 expected pointer to an iterator on stack")
int iter_new_bad_arg(const void *ctx)
{
bpf_iter_num_new(&global_it, 0, 1);
return 0;
}
SEC("raw_tp")
__failure __msg("arg#0 expected pointer to an iterator on stack")
int iter_next_bad_arg(const void *ctx)
{
bpf_iter_num_next(&global_it);
return 0;
}
SEC("raw_tp")
__failure __msg("arg#0 expected pointer to an iterator on stack")
int iter_destroy_bad_arg(const void *ctx)
{
bpf_iter_num_destroy(&global_it);
return 0;
}
char _license[] SEC("license") = "GPL";