bpf: Add check_func_arg_reg_off function

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Lift the list of register types allowed for having fixed and variable
offsets when passed as helper function arguments into a common helper,
so that they can be reused for kfunc checks in later commits. Keeping a
common helper aids maintainability and allows us to follow the same
consistent rules across helpers and kfuncs. Also, convert check_func_arg
to use this function.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220304224645.3677453-2-memxor@gmail.com

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Kumar Kartikeya Dwivedi 2022-03-05 04:16:38 +05:30 • committed by Alexei Starovoitov

parent caec549534

commit 25b35dd281

2 changed files with 44 additions and 28 deletions

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3

include/linux/bpf_verifier.h

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69

kernel/bpf/verifier.c

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