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02c68b10d8
Ensure that global subprogs and tail calls can only accept an unmodified PTR_TO_CTX for syscall programs. For all other program types, fixed or variable offsets on PTR_TO_CTX is rejected when passed into an argument of any call instruction type, through the unified logic of check_func_arg_reg_off. Finally, add a positive example of a case that should succeed with all our previous changes. 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/20260406194403.1649608-6-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>