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bpf: selftests: Test constant key extraction on irrelevant maps

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Test that very high constant map keys are not interpreted as an error
value by the verifier. This would previously fail.

Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
Link: https://lore.kernel.org/r/c0590b62eb9303f389b2f52c0c7e9cf22a358a30.1738689872.git.dxu@dxuuu.xyz
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Daniel Xu 2025-02-04 10:25:17 -07:00 • committed by Alexei Starovoitov
parent 884c3a18da
commit 973cb1382e
1 changed files with 15 additions and 0 deletions
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15
tools/testing/selftests/bpf/progs/verifier_array_access.c
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@ -713,4 +713,19 @@ unsigned int non_stack_key_lookup(void)
return val->index;
}
SEC("socket")
__description("doesn't reject UINT64_MAX as s64 for irrelevant maps")
__success __retval(42)
unsigned int doesnt_reject_irrelevant_maps(void)
{
__u64 key = 0xFFFFFFFFFFFFFFFF;
struct test_val *val;
val = bpf_map_lookup_elem(&map_hash_48b, &key);
if (val)
return val->index;
return 42;
}
char _license[] SEC("license") = "GPL";