selftests/bpf: Add syscall ctx variable offset tests

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Add various tests to exercise fixed and variable offsets on PTR_TO_CTX
for syscall programs, and cover disallowed cases for other program types
lacking convert_ctx_access callback. Load verifier_ctx with CAP_SYS_ADMIN
so that kfunc related logic can be tested. While at it, convert assembly
tests to C. Unfortunately, ctx_pointer_to_helper_2's unpriv case conflicts
with usage of kfuncs in the file and cannot be run.

Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Acked-by: Puranjay Mohan <puranjay@kernel.org>
Acked-by: Mykyta Yatsenko <yatsenko@meta.com>
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260406194403.1649608-5-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Kumar Kartikeya Dwivedi 2026-04-06 21:43:58 +02:00 • committed by Alexei Starovoitov

parent 02f500ce01

commit 5a34139b27

2 changed files with 267 additions and 6 deletions

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271

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

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2

tools/testing/selftests/bpf/test_kmods/bpf_testmod.c

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