selftests/bpf: Test CO-RE instruction poisoning restrictions

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Add raw CO-RE relocations that fail to resolve their target enum value.
Place each supported and unsupported instruction form in dead code.
Unsupported targets must fail relocation with a diagnostic even when they
are unreachable. Supported ALU immediates, memory accesses, and ldimm64
instructions must still be poisoned and removed as dead code, allowing the
program to load. Check that both halves of ldimm64 are poisoned.

Load every instruction stream without relocations first to ensure that
rejection is caused by the relocation rather than the original program.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://patch.msgid.link/20260917233222.2542500-8-memxor@gmail.com
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>

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Kumar Kartikeya Dwivedi 2026-09-18 01:32:15 +02:00 • committed by Eduard Zingerman

parent 394ae39833

commit 3440505aca

1 changed files with 60 additions and 1 deletions

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tools/testing/selftests/bpf/prog_tests/core_reloc_raw.c

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