selftests/bpf: Test invalid DW LDSX diagnostics

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An invalid BPF_MEMSX | BPF_DW instruction can reach Program Structure
diagnostics before opcode validation when placed at the end of a subprogram.
Exercise this path and require the disassembler fallback so table bounds
regressions are caught.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20260820022020.3450479-3-memxor@gmail.com

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Kumar Kartikeya Dwivedi 2026-08-20 04:20:19 +02:00 • committed by Daniel Borkmann

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commit 175a58668e

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tools/testing/selftests/bpf/progs/verifier_cfg.c

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